Patent Publication Number: US-6910972-B2

Title: Real-size simulated pneumatic drag strip ride

Description:
BACKGROUND OF THE INVENTION 
   This invention pertains to the field involving amusement rides and drag racing. More particularly this invention describes a simulated, real time, pneumatically powered, real effect drag strip race. This drag strip race may be a stand-alone amusement ride located in population centers or other amusement areas such as parks. This amusement ride is also well adapted to theme parks or amusement parks. These theme parks or amusement parks are located throughout the United States and the world. Such amusement parks are located in England, France, Germany, Russia, and even China. Actual drag strip races are common in the United States and throughout the rest of the world. This particular invention discloses a stimulated drag strip ride for use by the paying public. 
   Amusement rides are often simulations of much more dangerous real life rides or adventures. Many examples of these real life amusement rides have been created at large and small amusement parks across the United States and the world. Some examples include roller coaster rides, bumper car rides, airplane rides and go-cart rides. These rides often attempt to simulate the actual, true-life experience and create many of the same visual and physical sensations associated with those real life rides. 
   One type of real life race in which the average person is not allowed to participate directly due to the dangers involved is the drag race. A drag race comprises two highly powered cars located side-by-side on parallel tracks. When a signal tower is illuminated both drivers of the dragsters accelerate their cars in order to reach the finish line first. The signal tower allows spectators to see the actual winner as well as to see the times that have been posted. These dragster automobiles have high-powered gasoline engines and often accelerate to speeds in excess of 175 miles per hour. This acceleration causes G-forces to be exerted on the driver and any passengers in the dragster. In addition, the noise and exhaust of the dragsters contribute to the real life sensation of the race. 
   It is an object of this invention to create a real-size simulated drag strip race that reproduces the physical and visual sensations of an actual race. Accordingly, it is an object of this invention to simulate acceleration that will apply G-forces to the passenger and driver of the dragster. It is a further object of this invention to create both the sights and sounds of the drag race and to simulate the visual appearance of the dragster, racecourse and finish line. 
   Many amusement rides involve high velocity, dangerous curves and other safety hazards. However, since these rides are designed for laymen, rather than professional riders, safety enhancements and special features of any such ride must be included in the basic design package of any amusement ride. It is a further object of this invention to provide various safety devices, such as harnesses, brake systems, guide rails and other safety features to enable a driver and passenger to simulate a real drag strip race while still being completely safe. 
   Due to the new and unique nature of this particular simulated drag strip race, many innovations and special design features have been incorporated into the below described Specification in order to closely simulate a real life dragster race and to make it safe and exciting to use. 
   BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT 
   This particular ride is designed to recreate a dragster race to simulate the actual dragster experience. The dragster vehicle is designed to look like the well-known funny car, dragster or other racecar. The simulated dragster will have the same appearance of a regular dragster, and will have the same size and body construction as a real vehicle. The drag strip ride consists of at least two vehicles on separate, side-by-side tracks, with a parallel straight track of about 600 feet. A sophisticated, highly redundant control system utilizes multiple locks to keep vehicles separated during the ride. The vehicles appear to ride on upper, simulated wheels. However, the vehicle actually rides on lower actual wheels. The vehicles in the preferred embodiment are powered by a pneumatic system and can achieve speeds of up to 125 to 250 miles per hour, creating approximately 3.5 to 4.5 Gs of force on the driver and passenger of the dragster. The racecourse is laid out like a real drag strip, having a light tower at the finish line. The dragster itself is started and accelerated by the driver. For safety reasons, individual adjustable seats and harnesses are provided. 

   
     BRIEF DESCRIPTION OF THE DRAWING FIGURES 
       FIG. 1  is a perspective view of the drag race showing the side-by-side parallel tracks and the light tower and start line. 
       FIG. 2  is a plan view of the drag race strip and return track. 
       FIG. 2A  is a schematic diagram of the drag strip track of the pneumatic embodiment of this invention. 
       FIG. 3  is a perspective view of the simulated dragster body. 
       FIG. 4  is a perspective view of one embodiment of the dragster frame, including the simulated and actual wheels and the lower frame portions of the dragster. 
       FIG. 5  is a side cutaway view of the driver compartment of the dragster. 
       FIG. 6  is a side view of the steering wheel and shift button. 
       FIG. 7  is a partial side view of the simulated wheel. 
       FIG. 8  is a front cutaway view of another embodiment of the above ground embodiment of the dragster raceway. 
       FIG. 9  is a schematic view of a rail and caster track embodiment of the invention. 
       FIG. 10  is a cutaway plan view of the horizontal and vertical caster arrangement of one embodiment of the invention. 
       FIG. 10   a  is a side view of the horizontal and vertical caster arrangement of one embodiment of the invention. 
       FIG. 11  is a front cutaway view of the track showing one below ground embodiment of the invention. 
       FIG. 12  is a front cutaway view of another below ground embodiment of the invention. 
       FIG. 13  is a side view of the racecar and track of the pneumatic embodiment of this invention. 
       FIG. 14  is a perspective cutaway view of the track and base of the car of the pneumatic embodiment of this invention. 
       FIG. 15  is a front view taken along lines  15 — 15  of  FIG. 14  of the pneumatic embodiment of this invention. 
       FIG. 16  is side cutaway view of the pneumatic embodiment of this invention, showing the piston and cable system of propulsion at the start of the race. 
       FIG. 16A  is a side view of the pneumatic embodiment of this invention, showing the piston and cable near the end of the race. 
       FIG. 17  is a depiction of the “Christmas tree” signal lighting system used in practicing this system. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   A real size, simulated dragster race includes an essentially oval raceway with two side-by-side parallel acceleration strips as best shown in  FIGS. 1 and 2 . Left  1  and right  1 ′ simulated dragsters are located on left  2  and right  2 ′ parallel tracks. The race runs for approximately ⅛ of a mile from start to finish in a first embodiment. At the starting line is a signal tower  3 . This starting line signal tower has a number of lights such as are usually found in a real life drag race. The lights include a set of green lights to signal “go”, a set of yellow lights to signal “ready” and an electronic readout to signify the winner and the speeds at which each simulated dragster proceeded down the track. Different light systems can be used in practicing this invention. 
   Each dragster has an upper, pivotable top  4 . This pivotable top  4  moves upwardly (as shown in  FIG. 1 ) to allow passengers to enter the vehicle. The dragster top  4  is then closed (as shown in  FIG. 3 ) for the duration of the ride. 
   The entire simulated drag strip ride may consist of an essentially oval course as best shown in  FIG. 2 . The main part of the oval course includes an unloading area  5 , an instructional area  6  and a loading area  7 . These particular areas are used to unload passengers, to instruct passengers on the proper operation of the ride and an area in which passengers may be loaded. 
   After the passengers are loaded in area  7 , the ride is commenced. One passenger in each vehicle is allowed to control the take off of the dragster. The traditional signal tower lights at the starting line of the track commence the take off. Acceleration starts with a push of the accelerator pedal by the driver of the simulated dragster. Simulated shifting is accomplished by a push button also operated by the driver. 
   The dragster is accelerated for approximately 185 feet in an acceleration area  8 . Each dragster may accelerate to approximately 125 to 250 miles per hour, during which each driver and passenger would experience a force reaching approximately 3.5 to 4.5 Gs. Once each dragster has accelerated through the acceleration area  8 , the dragsters enter a coasting area  9  (approximately 260 feet) and a braking area  10  (approximately 260 feet). In the braking area, the dragster is automatically decelerated through means to be described later. The total length of the drag race from the loading area to the finish line is approximately ⅛ of a mile. 
   When the ride is finished, each simulated dragster slowly moves through the curved area and back onto the return tracks  11 . A middle maintenance track  12  is also provided for maintenance of the vehicle if desired. Once the dragsters return to the unloading area  5 , passengers are unloaded and the ride is completed. 
   In order to closely simulate a real life drag race, dragsters or “funny car” designs are adopted. One such design is best shown in  FIG. 3 . It is to be noted that the dragsters themselves may take on any design desirable, from drag race type cars to stock cars, to Indy cars. A typical dragster design would include a front, upper body  13  and a rear body  14 . The rear body  14  may be raised in order for riders to enter the car at the loading area  7 . However, when the car is in motion, the rear  14  of the body is in its closed and secured position as best shown in  FIG. 3 . To simulate an actual dragster, a cowl  15  and a spoiler  16  may also be incorporated into the outer appearance of the dragster. The simulated portion of the dragster is completed with the addition of simulated track wheels  17 , as shown in  FIGS. 3 and 4 . These simulated track wheels actually contact the track and may visually be observed by the driver and spectators of the simulated drag race. 
   The front  13  and rear  14  portions of the outer body of one embodiment of the dragster are supported by frame supports  18 , as best shown in  FIG. 4 . These frame supports  18  are preferably made of a strong yet lightweight metal. The dragster body itself may be made of fiberglass using a biaxial cloth with a modified vinyl ester resin. This fiberglass body and frame insures a lightweight dragster with superior strength. 
   Although the observer is able to see only the simulated track wheels  17 , the vehicle really rides on actual rubber or metal wheels  19  and  19 ′ ( FIGS. 4 and 12 ) or casters  33  and  33 ′ ( FIGS. 8–11 ). In the preferred embodiment, a set of front wheels  19  and  19 ′ and a set of rear wheels support the weight of the dragster as it moves down the track. 
   As shown in  FIG. 5 , a number of unique safety features are incorporated into this particular ride in order to insure the safety of the driver and passenger of the simulated drag strip race. These safety features include an adjustable helmet  20 . This adjustable helmet has a vertical adjustment member  21  and a horizontal adjustment member  22 . These adjustment members allow the attendant of the ride to adjust the helmet of the driver or passenger of the dragster according to his or her particular size. In addition, an adjustable seat  23  moves upward and forward, depending on the size of the driver or passenger. Finally, a Y-shaped safety seat harness  24  is provided for both the driver and the passenger of this drag strip ride. In normal amusement rides, a simple padded bar around the rider&#39;s waist would be utilized to keep the passenger in the ride. However, due to the special considerations in constructing a simulated drag strip race, a safety harness is incorporated into the overall design of the device. 
   The race begins when the starting line signal tower flashes green for “go”. At that point, each of the two side-by-side dragster drivers will push the acceleration pedal  25 . In real life this acceleration pedal feeds gasoline to the carburetor or fuel injectors of the engine. In this simulated ride, the acceleration pedal gives a signal to the linear induction motor, or other drive means to begin the race. A brake pedal (not shown on the drawing figures) is also provided to decelerate the vehicle should such a procedure be necessary. 
   The dash panel of the vehicle also includes a steering wheel  26 . Although the steering wheel is included for purposes of making the ride realistic, the vehicle actually rides on a straight and clearly defined track. While no steering of the vehicle is actually necessary or desirable, the presence of the steering wheel is used to enhance the realism of the device. However, buttons  27  and  27 ′ are present on the instrument panel, as best shown in  FIG. 6 . These buttons could simulate the actual shifting done in a dragster in real life, or could be used as simulated ignition or “ready” buttons. The use of these buttons is described later herein. Using the linear induction motor means of accelerating the vehicle, simulating shifting can be readily incorporated as a feature of this ride. Such a simulated shifting is described later. 
   As previously noted, the dragster itself rides on actual wheels  19  and  19 ′, which are hidden from the view of the spectators or riders of the vehicle. However, in order to provide a realistic depiction of the actual ride, simulated wheels  17  are provided on the front and rear of the vehicle. These simulated wheels  17  are held in contact with the upper track surface  39  by means of a wheel strut bracket  28  and a wheel strut spring  30 . This bracket and spring bias the simulated wheel strut  29  downwardly towards the track surface  39 , as best shown in  FIG. 7 . Each left and right front and rear simulated wheel  17  has such a spring mechanism. 
   Turning now to the linear track design,  FIGS. 8 and 9  show two such above track embodiments. 
     FIG. 8  shows the basic concrete track  31 . This concrete track  31  is normally comprised of concrete reinforced with approximately ½ inch rebar, as shown. Inside the simulated wheels  17  and underneath the dragster frame lower base  35  are side-by-side steel channel guide systems. These guide systems include a left channel  32  and a right channel  32 ′. These channels are generally C-shaped as shown, and face each other as illustrated in  FIG. 8 . The dragster frame lower base  35  is connected to an actual axle  34 ′ by a dragster lower base frame-actual wheel connection column  43 . The lower base frame  35  thus rides on the actual axle  34 ′. 
   The actual axle  34 ′ is connected to a series of casters, as best shown in  FIGS. 8 ,  9 ,  10  and  10   a . A left actual caster wheel  33  and a right actual caster wheel  33 ′ are located vertically. Although the axle  34 ′ does not turn, the caster wheels  33  and  33 ′ do turn. The vehicle itself is accelerated in the preferred embodiment by a linear induction motor  36 . While the actual axle  34 ′ supports the weight of the vehicle and passengers, a simulated axle  34  (as shown in  FIGS. 7 and 11 ) connects the left and right simulated wheels. However, as previously noted, these wheels are simulated wheels only and do not actually operate to move or drive the vehicle forward. 
   Turning to  FIG. 12 , the linear induction motor  36  and  36 ′ is shown in one embodiment. This linear induction motor  36  and  36 ′ creates a magnetic field in a reaction plate  37  that propels the vehicle down the track through the acceleration zone  8 . In order to understand the acceleration means of the preferred embodiment, a brief discussion of electromotive accelerating means would be beneficial. 
   Rotary induction motors, often referred to as “squirrel cage motors,” were invented decades ago. Their usage is now widespread. The compressor motor used in a typical refrigerator is an example of a squirrel cage motor. Michael Faraday discovered electromagnetic induction, the principle by which linear induction motors function, about 250 years ago. Further experiments by pioneers in this field such as Lenz vastly increased the understanding of this phenomenon. Electromagnetism functions within an induction motor when a current is passed through wire coiled around a conductive core (referred to as a motor). When a current is passed through such a coiled wire, the core produces a magnetic field. The direction of this field is dependent upon the direction of the current. The strength of the field is dependent upon the number of windings in the coil as well as the strength of the current. 
   If a non-ferrous, conductive metal (referred to as a “reaction plate”) is introduced into this magnetic field and there is relative motion between the field and the conductor, a current is induced in the conductor. This is known as electromagnetic induction. The induced current will flow within the conductor in a coil-like pattern, thus producing a secondary magnetic field, with the conductor as its core. It is the interaction between these two magnetic fields that creates motion. 
   A linear induction motor consists of one top  36  and one bottom  36 ′ of a motor bolted into a housing. There is a small air gap (approximately 18 mm in this application) in which the magnetic field produced by the motors is contained. The reaction plate  37  is an aluminum fin attached to the vehicle, as shown in  FIG. 12 . 
   When current is supplied to motors  36  and  36 ′, the windings of the motors produce a magnetic field that “appears” to be traveling forward. A second magnetic field is subsequently produced in the reaction plate, and this magnetic field (and hence the reaction plate and drag strip car) attempts to “catch up to” the first field. This effect is similar to moving one magnet on top of a table by using a second magnet on the bottom of the table. 
   The setup of the windings within the motors greatly effects how the reaction plate behaves. Each setup is dependent upon the estimated speed of the car as it passes through the respective LIM. This system is similar to gears in a transmission. Since the system is similar to gears in a transmission, the shift button  27  can simulate the shifting of gears in a dragster. A series of LIMs are utilized in this particular invention to create a launch time of the dragster through the acceleration area  8 . 
   The actual energy inputs, number of LIMS and LIM assemblies, launch amps and launch volts, as well as programmable launching controller systems are well known in the art and may be adapted to this particular drag strip race by someone with ordinary skill in the art. However, the use of a LIM to propel a drag strip ride for sudden acceleration such as this is new and unique to the amusement ride industry. 
   It is to be noted that the programmable launching controller system continually monitors the position and velocity of each dragster vehicle as it travels along the acceleration area  8 . Each LIM is switched on just before the vehicle enters and is switched off just after the vehicle exits. Once the vehicle reaches the required speed, (a maximum of approximately 250 miles per hour) all LIMs are switched off. The dragster vehicle then coasts through coasting area  9  and into braking area  10 . The dragster is decelerated by means of magnetic brakes and a redundant mechanical brake system on the vehicle. The mechanical footbrake also shuts down all LIMS. 
   The LIM housings used are designed and fabricated to very strict tolerances. The power to each pair of LIM is channeled through dedicated control panels having individual control panels and redundant fuses. Each LIM has three internal thermal protection circuits that will disrupt the power to the motor if it overheats. 
   Returning now to  FIG. 12 , the operation of the vehicle in its linear induction mode can be readily ascertained. The vehicle itself has upper frame supports  18  attached to the front  13  and rear  14  of the dragster bodies. The frame  18  is attached to left  19  and right  19 ′ actual wheels, which ride along in a predetermined track. The left  19  and right  19 ′ actual wheels are attached to the lower frame base  35  through the dragster lower base frame-actual wheel connection column  43 , as shown on  FIG. 12 . The actual wheels ride in troughs  44 . 
   In addition to the guide troughs  44  a LIM trough  38  is also provided. This LIM trough  38  houses the linear induction motor utilized to accelerate the dragster as described above. While the simulated wheels  17  ride on the track surface  39 , the actual dragster  1  rides on the actual wheels  19 . The wheels  19  are accelerated by the linear induction motor  36  and  36 ′ and the reaction plate  37 . 
   The LIM embodiment of this invention is best shown in  FIG. 12 . However, the below surface embodiment shown in  FIG. 12  could be modified such that the actual wheel trough upon which the dragster vehicle  1  rides is above the ground, as shown in  FIGS. 8 and 9 . 
   In another embodiment, shown in  FIG. 9 , the C-shaped steel channeled guide system  32  shown in  FIG. 8  is replaced with a guide system that includes a left side rail or pipe  40  and a right side rail or pipe  40 ′. These left and right circular side rails would be attached in the center of and underneath the dragster  1 , as shown. These side rails would be attached to left and right inner walls. However, in order to keep the dragster  1  on its correct path, horizontal  41  and vertical  42  restraining casters would be attached to the dragster frame lower base  35 . These restraining casters  41  and  42  are best shown in  FIGS. 10 and 10   a.    
   As shown in  FIGS. 10 and 10   a , the horizontal  41  and vertical  42  restraining casters are attached alternately to the dragster frame lower base  35 . The horizontal restraining casters  41  would keep the dragster vehicle  1  from moving sideways along the linear track. The vertical restraining casters  42  would keep the vehicle from moving up and down in a vertical direction along the track. The side rails and horizontal and vertical casters would be a modification of the steel-channeled guide system  32  as shown in  FIG. 8 . 
   One final alternate embodiment of the guide system for the dragster ride is shown in  FIG. 11 . In this embodiment, the dragster frame lower base  35  is connected to the actual wheel axle  34 ′ by the dragster lower base frame-actual wheel connection column  43  as shown. The linear induction motor system shown at  36  would drive the vehicle as previously noted. However, in this embodiment, the horizontal  41  and vertical  42  restraining casters would be driven along below-surface steel channel guides, as shown. These below surface steel channel guides  45  and  45 ′ are similar to the steel channel guides  32  and  32 ′ shown in  FIG. 8 . 
   The dragster  1  also has simulated exhaust smoke, which would be coordinated with the movement of the acceleration pedal by the driver of the vehicle. In addition, the acceleration pedal could be connected and coordinated with real sounds of a drag race through a sound system. The simulated sounds and vibrations of a real drag race are simulated through speakers in each driver&#39;s and passenger&#39;s helmet. 
   Another and preferred embodiment of this invention uses pneumatic air pressure to power the racecars down the drag strip. The pneumatic propulsion of the racecars is new to this particular field of simulated drag strips. However, the pneumatic propulsion of amusement rides has previously been disclosed in the art. The patents issued to Checketts, culminating with a 1997 United States patent, disclosed a pneumatic device for accelerating and decelerating objects. This patent, U.S. Pat. No. 5,632,686, was used to develop an oscillating parachute-type ride for amusement parks. The propulsion system described in Checketts disclosed a system of compressed air, a piston, and one or more pulleys, which, when oriented in the horizontal direction, can propel an amusement ride. However, certain modifications and improvements upon the general disclosure and design of the Checketts patent were necessary in order to propel the dual drag strips down the track. In addition, the concept of pneumatic propulsion of this drag strip ride required a new and novel approach to the use of pneumatic power on a flat, side-by-side track. 
     FIG. 13  discloses the pneumatic propulsion embodiment of this particular invention. The simulated dragster  1  has simulated track wheels  17  that ride on the track surface  46 . The dragster  1  is attached to the base sled  47  of the pneumatic embodiment by means of the connecting frame  48 . The connecting frame  48  is connected to the pneumatic propulsion mechanism and track to be described later herein. 
   The pneumatic propulsion mechanism is best shown in  FIGS. 14 and 15 . As shown on  FIG. 15 , the actual wheels  19  and  19 ′, which drive the entire mechanism, ride on upper track surfaces  49 . These upper track surfaces have an inverted L-shape, as shown on  FIGS. 14 and 15 . The wheels ride just below the track surface  46  and are connected to each other by axle  50 . On one side of one axle is connected an irregularly shaped safety brace  51 . This irregularly shaped safety brace is connected to the axle  50  and protrudes beneath the horizontal flange  52  of the actual wheel surface  49 . The flange and safety brace interlock such that the dragster  1  is secured from leaving the track in a vertical direction. 
   In order to ensure that the dragster  1  remains on the track in the horizontal direction, the horizontal safety wheel  53  is also attached to the axle  50 . This horizontal safety wheel  53  is mounted in a horizontal orientation as best shown on  FIG. 15 . Left and right horizontal safety wheel surfaces  54  are located along the length of the drag strip track. The safety wheel is attached to the axle  50  and hence the frame by means of a vertical safety wheel axle  55 . The horizontal safety wheel  53  may rotate on axle  55 , and allows the dragster  1  to travel down the track without the possibility that the dragster  1  could move or disassociate from the track in the horizontal direction. Since the dragster  1  is prohibited from leaving the track in either the vertical or horizontal direction, the safety of the dragster and the entire ride is thus assured. 
   The base sled  47  runs on four actual wheels shown best on  FIG. 14 . The front actual wheels  19  and the rear actual wheels  19 ′ are connected to the base sled  47  in a conventional manner. The base sled has a rectangular perimeter as shown on  FIG. 14 . This rectangular perimeter includes left and right side rails  56 , which run parallel to the track. Horizontal end rails  57  connect the side rails  56 . Inner horizontal rails  58  further reinforce the sled. 
   This particular and preferred track is not oval in shape, as shown in the embodiment disclosed in  FIG. 2A . Rather, the pneumatic embodiment track of this device is shown in  FIG. 2A . The pneumatic embodiment track includes a staging area  59  where participants may position themselves in the vehicle as previously described. The side-by-side tracks  60  and  60 ′ run approximately 600 feet. The 600 feet of track includes an acceleration area  61  of approximately 200 feet and a coasting and deceleration area  62  of approximately 400 feet. Rather than having an oval track where the dragsters move around in a continuous loop, the dragster in this particular embodiment decelerates and then moves in the opposite direction back to staging area  59  after the ride is completed. The propulsion mechanism for acceleration, deceleration and return is described further. The side-by-side tracks  60  and  60 ′ are laid out in a fashion similar to a railroad track, with ties  63  laid along the length of the track to form the foundation for the actual wheel surface  49  and the horizontal wheel safety wheel surfaces  54 . The horizontal ties are best shown in  FIGS. 14 and 15 . 
   Turning now to the actual propulsion system, the pneumatic acceleration and deceleration system is shown schematically in  FIGS. 16 and 16A . In  FIG. 16 , the pneumatic system is shown in the starting position, while  FIG. 16A  depicts the pneumatic system as the dragsters complete the drag race but before the dragster is returned to the staging area  59 . 
   Turning specifically to  FIG. 16 , a schematic of the propulsion system is shown. The propulsion system includes a cylindrical housing  64  that runs the length of the track. This cylindrical housing  64  creates a longitudinal bore  65  that runs parallel to the length of the track, as best shown in  FIG. 14 . Inside this longitudinal bore  65  is a piston  66 . The piston  66  is connected to a cable  67 . The lead end  68  of the cable is connected to the front end  69  of the sled. The trailing end  70  of the cable is connected to the rear end  71  as shown in  FIGS. 14 and 16 . The cable is looped around a starting line pulley  72  and a finish line pulley  73 . 
   The piston  66  is driven by the introduction of compressed air at the starting line end  74  of the cylindrical housing  64 . This is shown schematically by the arrow shown at the starting line end of the cylinder housing shown on  FIG. 16 . The introduction of this air pressure, and its regulation, has previously been described in the prior art, most particularly in the 1997 patent issued to Checketts. While the introduction of air to drive a piston is well known in the art, the particular horizontal and reversible application described herein is a new and novel way to use the propulsion mechanisms previously generally disclosed. 
   The finish line end  75  of the cylindrical housing  64  is sealed, except for the small aperture required to allow the cable to exit the cylindrical housing. 
   Each track ( 60  or  60 ′ shown in  FIG. 2A ) comprises a pair of cylindrical housings  64 . Thus, two longitudinal bores  65  are located directly beneath each track of the drag strip race. Each cylindrical housing  64  contains a piston  66 , as best shown in  FIG. 16 . 
   The operation of the acceleration and deceleration of the sled is based on the introduction of compressed air into the cylindrical bore  65 . As air is introduced at end  74 , the piston  66  is driven from left to right on  FIG. 16 . The movement of the piston  66  from left to right causes the acceleration of the dragster  1  from right to left. As the compressed air is introduced into acceleration chamber portion  76  of the cylindrical housing, the dragster  1  accelerates according to the amount and pressure of the air so introduced. As the dragster  1  moves down the drag strip towards the finish line, the area  76  in the acceleration chamber increases since the piston  66  is now traveling down the bore  65 . Ultimately, the acceleration chamber  76  increases such that the natural friction forces of the cable on the pulley and the dragster on the track begin to slow down or decelerate. 
   As shown in  FIG. 16A , as the dragster approaches the finish line, the acceleration chamber  76  is greatly expanded. This change in the acceleration chamber  76  creates a much smaller deceleration chamber  77 . Since the acceleration force is now greatly reduced, the sled is naturally slowing down. Further, since the deceleration end  75  of the cylindrical bore  65  is now smaller, the air within the deceleration chamber  77  is greatly compressed. Compression of this air also slows down the movement of the piston  66  from left to right. Eventually, the deceleration chamber compressed air creates a force that reverses the piston  66  such that the piston  66  slides from the position shown in  FIG. 16A  back to the position shown in  FIG. 16 . This reverses the direction of the sled  47  so that the sled ends up at the staging area for participants  59 . While the acceleration, deceleration and return of the sled are easily accomplished using the introduction of air pressure and the compression of air at the deceleration end of the housing, it is also within the spirit and disclosure of this invention to return the dragster to the staging area by means of the introduction of a small amount of compressed gas to the deceleration chamber  27 . 
   Each track  60  and  60 ′ has a pair of housings  64  with longitudinal bores  65  beneath the track to accelerate, decelerate and return the dragster. The introduction of the air is regulated by a computer, sensor switches, and valves as described previously in the prior art. However, the unique method of providing acceleration for a dragster, and compressing deceleration for the dragster, as well as the intrinsic return mechanism are all new and novel to this art. 
   As a final refinement of this particular invention, a Christmas tree tower  78  is shown in  FIG. 17 . This Christmas tree tower  78  is located near the starting line of the dragster race. The tower includes yellow Prestage lights  79 , yellow Staging light  80 , a set of three yellow Acceleration lights  81  and a set of two green “Go” lights  82 . These lights are located near the starting line. A set of lights  79  through  82  is arranged on the Christmas tree for each driver. The Christmas tree thus has a set of lights  79  through  82  on the left side of the tree for the driver in the left lane and a set of lights  79 ′ through  82 ′ for the driver on the right drag strip lane. 
   In order to enhance the reality of the dragster experience, it would be desirable to simulate the “burn out” of the actual dragster during preparation for the race. The “burn out” period is a period when the dragster driver spins his wheels on the pavement. This creates a loud noise as well as smoke coming from the frictional reactions between the rubber tires of the dragster and the surface. Obviously, in an amusement ride, one would not want to actually spin the simulated tires  17  on the track surface  46 . Therefore, a special roller  83  is provided near the starting line to simulate this experience. As the rear wheels  17 ′ of the dragster are located on the roller  83 , the simulated wheels  17 ′ are lifted slightly off of the surface  46  on the roller  83 . The roller turns rapidly, thus spinning the simulated wheels  17 ′ in an effort that closely simulates the actual “burn out” of a dragster prior to starting the race. Simultaneously with the spinning of the rear wheels, an audio amplification system plays sound effects that simulate the screeching of the tires in the actual “burn out” condition. Also simultaneously smoke is emitted from underneath the track surface  46 . The effect of the rear tires spinning, the loud screeching noise and the visual smoke emitted from the track all create a very close simulation of the “burn out” of a dragster. 
   Audio effects are also arranged along the track such that the occupants of the dragster as well as spectators near the track are able to hear the actual audio effects of a drag race. The screeching of the tires at “burn out”, the acceleration of the motor at the starting line, the sound of the motor moving down the track, as well as the deceleration sounds are simulated throughout the ride. These simulations are coordinated by the operator of the ride and by the use of a computer system. The computer system is connected to the audio system and synchronizes the noises of an actual drag race as the race progresses. The audio system is available in speakers along the track as well as in the actual dragster. Thus, the occupants of the dragster as well as the onlookers are treated to the full audio, visual, and actual effects of a drag strip race. 
   The operation of this second embodiment closely simulates the actual drag strip race, including both audio and visual scenarios. As the rider approaches the staging area  59  for participants, the top of the simulated dragster is opened and the driver and/or passenger is seated. The Y-shaped harness is fastened. The driver is within easy reach of the steering wheel and operational buttons  27  and  27 ′. The driver of the simulated drag strip begins the ride by pushing the button  27  on the dash, which is the start button. This button then actuates the audio engine idling sound and moves the dragster forward slightly, approximately two feet. As the rear simulated wheels  17 ′ cross the “burn out” roller  83 , the rear wheels are rotated by the roller. Simultaneously, the audio simulation of the screeching tires, as well as the simulated smoke emitted from under the track, create the sensory experience of a dragster “burn out”. 
   The simulated dragster then approaches the starting line, moving forward approximately one foot. As the dragster is going through this process, the first yellow or Prestage light  79  on the Christmas tree tower  78  illuminates. The operator of the simulated drag strip then pushes the second yellow Staging button  27 ′. This activates the staging sound simulation that simulates a motor revving at the starting line of a drag strip race ready to accelerate the dragster down the track. 
   When both dragsters are at the staging position on the starting line, the operator of the ride will illuminate the three yellow Acceleration lights  81 . When these yellow Acceleration lights  81  are illuminated, each driver should push down on the acceleration pedal  25  as quickly as possible to begin the drag race. In this simulation, a computer module allows approximately 0.04 of a second between the times that the three yellow Acceleration lights  81  are illuminated until the time that the two green “Go” lights  82  are illuminated. Once the green Acceleration lights are illuminated, the pneumatic powered system accelerates the dragsters by the introduction of high-pressure compressed air as previously described. The race will be won by the driver who presses the acceleration pedal  25  the fastest. While the acceleration pedal does not in fact allow the driver to accelerate the dragster once the green lights have occurred, since this occurs automatically by the introduction of the compressed air, the initial reaction time of each driver determines the outcome of the race. 
   In the event a driver depresses the acceleration pedal before the “Go” lights  82  are illuminated, a built-in several second delay from the green light illumination to the pneumatically powered automatic acceleration force is applied to that dragster. This means that a person who defaults the race by depressing the acceleration pedal before he is allowed will actually cross the finish line later in time than the person who correctly depresses the acceleration pedal within the yellow light “Acceleration” time and the green light “Go” time. In a normal race, of course, the dragster that begins the race before the green lights would cross the finish line first, since he has a head start. However, in this simulation, the penalty is applied at the beginning of the race so that the driver who correctly accelerates his vehicle according to the lights will actually cross the simulated finish line first. 
   While the race is occurring, audio sounds of a typical drag race will be reproduced both by the audio means within each dragster itself and by an audio system located along the length of the track. 
   Several refinements to this particular system are well within the keeping and disclosure of this invention. For example, the pulleys  72  and  73  may be expandable and may take the form of adjustable shives. These shives would move the outer edges of the pulleys to widen the pulleys or to lessen the distance between the outer edges of the pulleys, thus adjusting for the acceleration of the cable. Furthermore, the apertures necessary to allow the cables to exit either end of the cylindrical bore could be larger or smaller, depending on the specific tolerances necessary to accelerate the dragster. Furthermore, the cables could be nylon-coated cables so that the leakage of the apertures would remain quite minimal. 
   It is to be appreciated that this device is new and novel as a general concept with respect to amusement rides. Both the creation of the actual physical and visual sensations involved in this drag strip ride, as well as the numerous innovations required to make such a ride safe and realistic have not heretofore been disclosed by any known devices. However, the actual embodiment of this device is meant as a means of illustration only. Minor variations of the appearance of the device, the location and shape of the track, as well as the drive mechanisms is still within the keeping and spirit of this invention. For example, the racetrack could be ¼ mile or longer. Further, a simple bungee cord type of propulsion system or a spring mechanism could replace the described preferred pneumatic system of propelling the vehicle.