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Can I Raise The Height Of Engine??

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Can I Raise The Height Of Engine??

Old 01-20-2007, 10:15 AM
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Michden
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Default Can I Raise The Height Of Engine??

Hi--I am building a Yak-18 military trainer 40 size ARF from Hobby People. Invert, 40 Magnum does not line up well with the fiberglass cowl. I would like to raise the engine about 3/8" --As it sits now to line up the center of the crank shaft with the hole in the cowl, the cowl has a downward slant looking from the side view and looks stupid. Side to Side is good. What effect will raising this engine- 3/8" -have on flight??
Old 01-20-2007, 10:31 AM
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aerowoof
 
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Default RE: Can I Raise The Height Of Engine??

when you raise the engine you also raise the thrust line,there may be a slight change in pitch control at certain power settings,probaly not even noticeable.
Old 01-21-2007, 03:13 AM
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ho2zoo
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Default RE: Can I Raise The Height Of Engine??

I have the same plane and did the same thing. Except I used an MDS .46 engine and re-mounted the engine mount to the firewall so that the engine would be upright instead of inverted. Knocked the blind nuts out of the firewall, filled the holes with hardwood, and redrilled the holes for the new mount position.

The plane flies very well. But I hate the stupid MDS engine! Runs too hot and surges back and forth. Need to replace it.

It is a good flying plane though.
Old 01-22-2007, 04:14 PM
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pt19 flyer
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Default RE: Can I Raise The Height Of Engine??

hi

when you raise the engine you will also have to adjust the fuel tank position to be centerline or 1/4 to 1/2 inch below needle valve for proper engine operation.

good luck and happy flying

pt19 flyer

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