I well knew the specs when I got the plane and engine. I had also read several times the review here in RCU Mag as well as watched carefully what everyone was using for power. .50 2 strokes and .63-.72 4 strokes are all I have seen used, accept for Dave Patrick. I was concerned about getting a 4 stroke, and my concers have become reality. What a mistake. It vibrates a lot and is very finicky to get adjusted correctly.

The DPM Ultimate 40 is well over 5 lbs. I cannot imagine a .45 size 2 stroke in it. What a slug it would likely be. The only .45 I have is a Viper Q500 that weighs 4.25 lbs and it is just adequate.

I have always over powered my planes. My previous Ultimate was a .40 size running a .60 on a tuned pipe which weighed 4.75 lbs ready to fly, and it flew great.

An intersting note on Dave Patricks addendum to the RCU review. DP said the Saito 72 would add considerable vibration, well he was right. He also said it would add considerable weight, mine was still tail heavy. I have the 1450 mah battery on the firewall and 1/2 oz of weight on the nose to get the CG at 1.25" in front of the rear cabane. DP recommends 1.5" to start and then move back slowly, I'm not adding the additional 2 oz to it though to get the CG where he recommends. My .45 is 3 oz lighter than the Saito.