Catalyst Machineworks Speed Addict 210-R FPV Racing Frame Super low top fuselage deck keeps lithium battery low and centered between props allowing as much mass as possible centralized at the line of thrust. Ideal center of gravity with this design. Incredibly durable design that is highly resilient to crashes. Nearly impossible to break! Constructed of high quality twill weave 3K carbon fiber. Unibody "X" frame configuration. 4mm thick main frame plate. 220mm size. Fits 5" props. 118 gram bare frame weight (with included antenna). FPV camera is adjustable from 0 to 45 degrees. Aircraft grade blue aluminum fasteners. Arms support 1806, 2204, 2205, 2206, and 2208 sized motors. Highest quality FPV racing frame in the industry. Designed and manufactured in the USA. Electronics sold separately. PDB NOT INCLUDED More force is required to rotate an object if that object&#039;s mass concentration is located some distance from the axis of rotation. Conversely, less force is required to rotate said object the closer you bring the object&#039;s mass toward the axis of rotation. In other words, think of an ice skater spinning. As she brings her arms in tight towards her body she spins faster. As she moves her arms away from her body she spins slower. This technique of mass placement is used by engineers of full scale aerobatic craft looking to optimize maneuverability. This principle also applies to racing drones. To accomplish this we locate the power distribution board below the main frame plate. Bringing the PDB down in this way allows everything else above the PDB to be brought down as well. Including the flight controller, top fuselage deck plate, and most importantly the lithium battery. This super low profile deck is one of the hallmarks of our design and keeps the largest contributor to overall craft weight (the lipo) as close as possible to the axis of roll and pitch rotation. With any aircraft speed and agility are directly linked to power/weight ratio. The lighter the craft is compared to it&#039;s overall power output the faster it will go. Additionally, its ability to make directional changes improves (a.k.a. agility). To keep weight down we employ a unibody &#034;X&#034; design. Unibody keeps overall frame weight low because less fasteners and carbon fiber are needed to join the frame together. In addition our use of carbon fiber is very efficient throughout the frame. Carbon fiber is located where it needs to be, with any unnecessary material removed. But, durability is not compromised. The Speed Addict 210 will accept very high power motor and prop combos. 2206 motors will fit, but the ideal motor is a 2204 spinning 5&#034; props. A craft that is symmetric about it&#039;s center of gravity has better flight characteristics than a front heavy or tail heavy design. In addition, its imperative to line up the center of gravity as close to the propeller plane as possible. When the two exist on the same plane there is a smaller moment to overcome during maneuvers resulting in more rapid directional changes. We accomplished this by the use of 3D Computer Aided Design. We assembled everything together in the CAD model. The program is used to calculate where the true center of gravity exists in 3D space. This information allowed us to alter the frame design and location of all the electronics and gear to move the center of gravity to the optimum location. This was an iterative process and required extensive work. After months of work we finally accomplished our goal. Dry frame weight is 118 grams without included antenna mount. Ideal center of gravity location. Unibody &#034;X&#034; frame configuration. Symmetric weight distribution front-rear and side-side. Super low top fuselage deck keeps mass low as possible. Durable robust design that is highly resilient to crashes. 210mm frame size optimized for 2204 motors paired with 5&#034; props. 210mm frame and 180mm frame share most of the same parts. Only the main frame plates are different! High quality twill weave 3K gloss carbon fiber construction. High quality black anodized aluminum frame standoffs. All aircraft grade 7075 blue aluminum fasteners. FPV camera is adjustable from 0 to 45 degrees. Anti-vibration HD camera mount removes jello from your footage. Never balance props again. (Sold separately) Anti-vibration HD camera mount orients camera at 35 degrees. (Sold separately) Anti-vibration HD camera mount is <span class="a-text-italic">field removable</span> in minutes by removing 4 screws. (Sold separately) RX antenna mount included. 3mm or 4mm thick unibody lower frame plate. 3mm thick FPV camera cage top plate. All other plates are 1.5mm thick. XT-60 passthrough grommet. 4mm Frame Weight: 123 grams with antenna mount or 118 grams without. Frame size is 210mm - prop to prop diagonally. Supported motors: 2204, 2206, 2208, 1806, 1306. Supported lipo sizes: 1000mah - 1800 mah Supported lipo voltage: 4s is suggested for this frame. Max prop size: 5&#034;