The Lancia V6 in 1950 used a 60° angle between the cylinder banks and a six-throw crankshaft, to achieve equally spaced firing intervals of 120°. This still has some balance and secondary vibration problems. The first Buick V6 was a 90°, based on their 90° V8. This produced a rough-running design. This was unacceptable to many customers. Later designs have improved the engine and made it reasonably smooth.
The most efficient cylinder bank angle for a V6 is 60 degrees. This makes the smallest size engine and reduces vibration. 60° V6 engines are not as well balanced. Modern design has reduced most of the vibration. 60 degree V6 engines do not need balance shafts. This design works well in larger cars where four-cylinder engines do not have enough power.
Some 90° V6 engines are built. They are usually based on V8 engines. It takes little work to change a V8 into a V6 engine. The problem is these engines are wider and have more vibration than a 60° V6. More modern 90° V6 engine designs avoid vibration problems by changing the crankshaft's design and firing timing. Balancing shafts are often used to remove the remaining vibration.
120° could be thought of as the "natural" angle for a V6. Each cylinder fires a power stroke every 120° of crankshaft rotation. This allows pairs of pistons to share crank pins (a connection on the crankshaft). Unlike the V8, there is no way to arrange a V6 to balance the piston forces. Because of the odd number of cylinders in each bank, a balance shaft is needed.
The 120° design also creates a very wide engine. It is too wide for most cars. It is often used in race cars. Race cars are designed around the engine, and vibration is not as important.
The flat-6 "boxer" engine (180°) is only slightly wider than the 120° V6, and it is fully balanced.
When the fuel in a cylinder is burned, it pushes the piston down and creates power. This is often referred to as "firing".
Many early V6 engines were based on V8 engine designs. This made a firing pattern with groups of two cylinders with an "odd-firing" order. This resulting in rough-running engines with unpleasant vibrations at certain engine speeds.
More modern 90° V6 engines avoid this problem. They use a split crank pin where the piston connects to the crankshaft. This makes an even 120° firing pattern. A 'split' crank pin is weaker than a straight one. Modern metallurgical techniques can produce a crankshaft that is strong enough to not break.
The V6 engine was introduced into racing by Lancia in the early 1950s. They had some good results. Then Ferrari built the Dino V6. Alfredo Ferrari, the son of Enzo Ferrari, was nicknamed Dino. He suggested building a 1.5 litre V6 engine for Formula Two racing. The Dino V6 was updated several times, and increased to a 2.4 litre engine. The Dino V6 was used in the Ferrari 246 Formula One car in 1958.
Laverda showed a 996 cc V6-engined motorcycle at the 1977 Milan show. The motorcycle was raced in the 1978 Bol d'Or 24 hour race.
Valtteri Filppula
Valtteri Filppula (born March 20, 1984) is a Finnish professional ice hockey centre and left winger. He currently plays for the Tampa Bay Lightning of the National Hockey League (NHL). He has also played in the NHL for the Detroit Red Wings and for Jokerit of the SM-liiga. His brother Ilari Filppula plays hockey for HC CSKA Moscow of the Kontinental Hockey League (KHL).
Before playing in the NHL, Filppula played two seasons with Jokerit of the SM-liiga. He was drafted with the 95th overall by the Detroit Red Wings in the 2002 NHL Entry Draft. Filppula won the Stanley Cup with the Detroit Red Wings in 2008 when they beat the Pittsburgh Penguins 4 games to 2.
On July 5, 2013, he signed a five-year, $25 million contract with the Tampa Bay Lightning.
Filppula won a bronze medal at the 2010 Winter Olympics with team Finland.
Foolad F.C.
Foolad Khuzestan Football Club is an Iranian football club, based in Ahvaz, Khuzestan.
The table below chronicles the achievements of Foolad in various competitions since 1997.
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Rah Ahan F.C.
Rah Ahan Football Club is an Iranian football club based in Shahr-e-Rey. They currently play in the IPL.
The table below chronicles the achievements of Rah Ahan every season, from 2002 to the present day.
Saba Qom F.C.
Saba Qom Football Club is a football team based in Qom, Iran.
The table below chronicles the achievements of Saba Battery every season, from 2002 to the present day.
Sepahan Esfahan FC
Sepahan Esfahan is an Iranian football club based in Isfahan, Iran. Sepahan is the last champion of the IPL in 2009-10 season.
Top Goal Scorer in the Iranian Premier League
2009-10 : Emad Mohammed Ridha - 19 Goals
The following list of clubs are affiliated with Sepahan:
Mes Kerman F.C.
Sanat Mes Kerman Football Club () is an Iranian football team based in Kerman, Iran. The team is named after and sponsored by Kerman's copper industries.
as of August 27, 2010
Cam Neely
Cameron Michael Neely (born June 6, 1965 in Comox, British Columbia, Canada) is a Canadian retired professional ice hockey right winger. He played for the Vancouver Canucks for 3 seasons and the Boston Bruins for 10 seasons. Neely was inducted into the Hockey Hall of Fame in 2005. He was named President of the Boston Bruins on June 16, 2010. His jersey number #8 was retired by the Boston Bruins.
Neely joined the 50 goals in 50 games club when he scored 50 goals in 44 games in 1993–94.
Both of Neely's parents died of cancer. He set up the "Cam Neely Foundation". He helps cancer patients live at the "Neely House" while having cancer treatments.
Notochord
The notochord is a flexible, rod-shaped body found in embryos of all chordates. It forms the axis of the embryo. In some chordates, it persists throughout life as the main support down the length of the body. In most vertebrates it is replaced by the vertebral column. The notochord is found ventral (underneath) the neural tube (future spinal cord).
Notochords were the first "backbones" in chordates. Notochords were advantageous to primitive fish-ancestors: they were a rigid structure for muscle attachment, but flexible enough to allow movement. Embryos of vertebrates have notochords, and develop the vertebral column later.
Hurricane Diana
Hurricane Diana struck Mexico in August of 1990 Atlantic hurricane season. Although the hurricane had winds speeding at only 100 miles an hour, the storm still killed more than 130 people. This hurricane also caused more than $100 million in damage (1990 USD). The name Diana was later retired in Spring of 1991 and then replaced by Dolly.
Hurricane Erin (1995)
Hurricane Erin struck Florida twice: the eastern side and the Panhandle Region in the 1995 Atlantic hurricane season. The storm also struck Alabama. It was not a very severe storm, though the damage caused by Erin was over $700 million. Despite the damage, the name Erin did not get retired.
Tropical Storm Alberto (1994)
Tropical Storm Alberto was a catastrophic storm in the 1994 Atlantic hurricane season. The cyclone was responsible for between 22 and 38 deaths and between $500 million and $1 billion in destruction (1994 USD). The storm struck Northwest Florida, southwest Georgia and Alabama. In spite of the destruction, the name "Alberto" was not retired.
Menai Strait
The Menai Strait (, the "River Menai") is a narrow stretch of water which separates the island of Anglesey from the mainland of Wales. It is in the northwest corner of Wales. The straight is about 25km long. The water is not very deep. There are two bridges over the strait. The A5 road (which goes all the way to central London), goes across by the Menai Suspension Bridge. There is also the Britannia Tubular Bridge.
Zob Ahan Isfahan FC
Zob Ahan Football Club is an Iranian football club based in Esfahan, Iran.
The table below chronicles the achievements of Zob Ahan since 1973.
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Paykan F.C.
Paykan Football Club , is a football team based in Qazvin, Iran.
as of August 16 2010
List of Team Umizoomi episodes