hermanmullis(at)aol.com
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 Posted: Mon Dec 15, 2008 2:05 am Post subject: aero-BMW info |
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Dale- There are no easy sources for the BMW conversion!
i started with by looking at the old Zenith files.
Then googled BMW aircraft and found lots of homebuilders in Europe with these engines.
One of them led me to:
www.takeoff-ul.de
Which has an English translation but poorly done. They specialise in pushers and are expensive!
Here is another German source:
http://www.silent-hektik.de/
They specialize in fuel injection and are also expensive!
Finally, i spoke to sales at Woodcomp propellers in CZ, who told me about Boris Lange of Kostonice.
Boris has a flight school in the Cz Rep which started with a crashed 601, which he repaired.
It's still flying and now has over +3000 hours with the Bmer engine (also a crash).
i flew it also, over a year ago on a cold November day.
It took 5 minutes of taxiing to get the oil temp up to normal!
He now has 3 aircraft, all with Bmers, all with >1000 hours on the engines.
Boris told me that his business depends on the BMW engines because his students can't afford the fuel on the Rotax!!
One of his students is now flying as a passenger pilot in Arizona!
However, Boris speaks only Czech and Russian, so i had to get a German-Czech Translator.
He built my gearbox. He has also built 20 more gearboxes for friends and clients. Including me.
Up he recommends the R1150 R Bmer engine and you must send him the Brain box as well.
Getting a good engine is the first problem, with all the electrical! But no tranny or flywheel.
Mine cost me 1000 u$d. It's a 2001 R1100 S.
The 1200 series engines have more power but a new and more complicated Brain box and cannot be reprogrammed for flight!
You must get a new one from SH above, since BMW will charge you an arm and a leg and is useless for flight!
Boris does not make gearboxes for the 1200 because of this! He uses all original BMW parts.
Right off the bike!
If you have access to metal shop you could probably make your own gearbox using a Rotax gearbox and a clutch!
Another guy who is flying a Cherry, used a Hirth gearbox and a clutch from Take-Off.
The BMW engine is the only fuel injected, air cooled engine that you can literally, take off the bike and bolt on and fly without mods!
Right now, i am cutting down the profile and moving the alternator in order to make it fit under the cowl,
but Boris just cut the top of the cowl for his first conversion. Ugly, but cheap!
The whole thing weighs about 80kg and produces >90 hp.
So far, it's cost me ~5000 u$d for the engine, gearbox and prop.
HKM
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