Mazda Forum - Mazda Enthusiast Forums - Ultimate Rotary Engine, 12 Rotors

Didn't know where to put this as this is a unique item, but should be familiar with Mazda rotary engines.
This is a custom motor. The 12 rotors, displacement measures 960 cubic inches. Overall, the 12-rotor engine is 30 inches long, 31 inches wide and 24 inches tall. Total weight is 830 pounds.
http://cdn.speednik.com/files/2014/02/12r4.jpg
“We came to the limit what a big-block could,” says Gavin. “We wanted to make more continuous power, not just power for drag racing. The rotary makes more power for its size.”
[Y design] was the only way get 12 rotors in the space of a big-block.”
Basically, there are three banks of four rotors. The top two banks help drive the bottom bank that has the actual output shaft. The three banks are connected by a gears on the back of the engine block. One bank is set up to counter rotate against the main bank while the other gearset is fitted with a idler gear so it rotates in the same direction as the main shaft.

“We needed one bank to counter rotate so the exhaust side would match up with the other,”
According to Gavin, the engine is designed to be flexible enough to use in pleasure boating at around 1,400 horsepower for up 400 hours between scheduled maintenance, or it could be turborcharged with a pair of 122mm turbos (10 pounds of boost) to make 2,400 horsepower for about 200 hours for poker runs and other spirited adventures. Both those power numbers are on 87 octane fuel. Jumping up to 25 pounds of boost on race gas could elevate the power levels beyond 3,600 horsepower. And 50 pounds of boost could result in over 5,000 horsepower. For steady state running, recommended rpm will be in the 8,500 to 9,000 range. But an all-out drag version could spin up to 14,000 rpm.

“These numbers come from a 2-rotor version we built and dynoed,” says Gavin. “We’ll start off with two turbos. If they don’t supply enough air, we’ll add two more.”

The modular design of the engine allows a variety of configurations, including diesel and a 6-rotor version.

http://cdn.speednik.com/image/2014/02/12r2.jpg
http://cdn.speednik.com/image/2014/02/12r3.jpg
http://cdn.speednik.com/files/2014/02/12r1.jpg

Watch the last part of the video where there is a glass of water on the engine, the engine runs so smooth it does not even ripple the water. The glass on the back you are seeing the reflection of the exhaust tubes bouncing on the flat surface of the water. The water actually does not even have a ripple.