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Aviation
- Thread starter donbmw
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That is really cool.
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Can't wait to see it fly... wonder if the pilot needs a multi engine rating to fly it?
aeronca65t
Great Pumpkin
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That is knock-your-socks-off cool!
BustedKnuckles
Jedi Knight
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The construction photos are mind blowing. I'm going to dedicate a whole day to go through those albums slowly!
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Quite an accomplishment to say the least. I'm wondering what those engines are? At first I thought they were the later Rotax engines, but I don't think so. They have an odd head position on them which should make them easy to identify, but I don't have them in my list of engines. PJ
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This is what I found regarding the engines:
The engines are the Hirth 3002 4-cylinder 2-stroke that usually have a reduction unit and make about 80hp. Jack chose this engine because of its size... it was small enough to fit inside a properly scaled nacelle. However, to make it fit properly, the reduction unit is removed which will bring the power down around 60hp each, with the engines spinning the 46.4" diameter props at about 3,300 rpm.
The engines are the Hirth 3002 4-cylinder 2-stroke that usually have a reduction unit and make about 80hp. Jack chose this engine because of its size... it was small enough to fit inside a properly scaled nacelle. However, to make it fit properly, the reduction unit is removed which will bring the power down around 60hp each, with the engines spinning the 46.4" diameter props at about 3,300 rpm.
That reminds me of this plane -- a 3/8th scale PBM Mariner that the Martin company built as a scale prototype:
Tadpole Clipper by onyxsax, on Flickr
The "Tadpole Clipper" as it was called is amazingly still extant. It was restored by a group of former Martin employees and is now on display at the Baltimore Museum of Industry. IIRC, it is powered by an inverted Chevrolet engine (it was the only way it could fit) which turned the two props. One of the guys who currently works up at Jack Kosko's hangar in Fawn Grove, PA was one of the guys who helped restore the plane.
Tadpole Clipper by onyxsax, on Flickr
The "Tadpole Clipper" as it was called is amazingly still extant. It was restored by a group of former Martin employees and is now on display at the Baltimore Museum of Industry. IIRC, it is powered by an inverted Chevrolet engine (it was the only way it could fit) which turned the two props. One of the guys who currently works up at Jack Kosko's hangar in Fawn Grove, PA was one of the guys who helped restore the plane.