David aircraft engine, David 4 stroke 60 HP aircraft engine.

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David ultralight aircraft engine

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David vs. Goliath (Rotax)
Over the years I have flown on many different brands of engines - the majority were not "aircraft engines." That is they weren't until they were put on an ultralight - then of course they became aircraft engines - sort of. Due to liability especially in the U.S. manufacturers have shied away from openly supplying us at their front door. Through the back door we have been able to obtain just about anything we wanted to use. Japanese manufacturers have been the most "openly" against selling us engines, while for some reason we are still able to get new engines parts etc. I won't go into naming names - however a new engine to the U.S. was introduced at Oshkosh - The David engine.

The first manufacturer to install the David engine on his plane was Mark Bierle owner and manufacturer of the Thunder Gull line of aircraft. Mark is a great guy, down to earth easy to talk to and always open to new ideas. Another thing about Mark is that he has never trailered a plane to the show, he always flies them in. Mark has made the trips from home base the Rotax 277, the 503, 582, and 912. Last year he flew in on the HKS 60 HP four stroke. So if you want to get an honest comparison on an engine Mark is a good guy to talk to.
At Sun N Fun Mark gave the HKS a good rating, saying that it was a little more powerful than the 503 while not quite up to the power of a 582. He also said it was quieter and a little stingier on fuel than the Rotax line of engines.

When asked about the new David engine Mark was again honest and straight forward. While the engine is suppose to put out 60 HP he was not able to get that out of it with the reduction drive and prop supplied. He did say that he believed this was just time. His impression of the engine was that it would indeed pull 60 hp. Noise came in about the same as the HKS, with fuel about the same. The engine is a V twin design, adapted from an industrial engine concept with the addition of some formula racing technology. Looking very close at the engine I would swear that it was a dual overhead cam Honda generator engine - but then what does a little short sighted, bald headed Canadian know.

If this thing does come out on the market, and is priced right, and is in fact produced by a "major manufacturer" with world wide parts and service it will certainly fill an opening in the ultralight 4 stroke power hunt.

David 4 stroke 60 HP aircraft engine.

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