If I may be so bold as to point this out. . .

In a bit of an impromptu "test" to see if my BME110/Composite-ARF 40% 330 combination was a viable competitor for the heavier CA40% 330's powered by DA and 3W150's, we held a "just for fun" drag race at the Mocksville IMAC contest after the competition was finished. About 50 people were on hand to watch the fun.

All 3 planes are 40% Composite-ARF 330's. Mine is a "lightened" version, that has a takeoff weight full of gas of about 30.5 lbs. The other two 330's were not weighed, but carried the "normal " equipment. The 3W powered aircraft had a 3W150 TOC on Tuned pefa Canister exhaust, the DA had standard DA mufflers. All planes ran Mejzlik propellors, 32-10's on the 150's and a 28-10 on the BME110.

The first matchup was the 3W powered plane against the BME110. The planes started side-by-side in the middle of the runway. 3...2...1...GO

The BME leapt ahead and was off the ground going vertical in about 15 feet. . .the 3W powered plane took about 30 feet to get airborne and by the time it was going vertical the BME was about 3-4 lengths ahead and gaining ground. After 10 seconds (unofficial duration limit) the BME110 powered plane was about 7-8 lengths ahead of the 3W 150 powered plane. . . we then broke it off and went flying for a while.

The second "Race" was BME110 vs. DA150. . using the same lineing-up and start process. . .this time the BME stumbled slightly due to a long idle period, and didn't get up to full power instantly the way it had before. When the BME plane broke ground so did the DA powered plane, and it was a dead heat at that point. 10 seconds later the BME powered plane was ahead by 2-3 lengths as the planes passed through about 750 feet or so, then we broke it off.

NOW. . .the results may vary from day to day, tuning setup and prop selection make a big difference, and a bit of "tweaking" may have gotten some more power out of any of the engines involved. The other two flyers, and myself, all run just a little rich on the top end of the power curve. That being said. . The BME's performance was ( to put it mildly) VERY impressive.

So. . you just gotta ask yourself. .

Which engine do you REALLY want???

These pics were taken of the "event". . the DA vs. BME part of the race.

Photo #1. . Combatants for the DA vs. BME part of the race venue. . On the left. . BME110 powered plane. . on the right the DA-150 powered plane. . Note the difference in propellor lengths.
Photo #2 .. Lined up and. . GO. . rpm's just coming up as the planes begin the race. . BME stumbled a little bit before it got going, so the DA has the lead at this point. . .

Photo#3. . It's a close race. . BME powered plane on the right, but closer to the camera from this angle.

Photo #4. . Both planes are a dot. . Witnesses reported the BME powered plane had a slgiht lead. . Either way. .both planes reached altitude in a BIG hurry.