Welcome to Valley Engineering, L.L.C and Culver Propellers.
We
specialize in giving you the very best in PSRUs for the VW engine,
and custom made propellers for your ultralight and light sport aircraft.
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Check out our Backyard Flyer UL page for updated photo gallery. 

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Presenting the new part 103 LEGAL Back Yard Flyer 
Swing-Wing Ultralight . 
Please note: There is an error in the February 2009 issue of Kitplanes Magazine. The Big Twin is NOT a Harley-Davidson engine. Please click here for more details.

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We use only the finest, hand selected hard woods for your propellers, and we draw upon over five years of extensive research and development to provide you with a high quality reduction unit for your VW engine. We also offer two different High Performance light Aircraft. The two-seat Back Yard Flyer and the single seat Back Yard Flyer UL/SP.  For your light sport aircraft engine needs, we also offer the Big Twin, two-cylinder, four-stroke engine. The Big Twin is your new alternative to two-stroke engines. Check out our information sheets, our products, our photo galleries, and our prices. We're here to make your flying experience the best it can possibly be!
AIRVENTURE 2010 IS COMING UP!!!
Please stop by and see us and say, "Howdy"  at our booth in the Ultralight display area . The Back Yard Flyer Swing-Wing will be there plus a few surprises.  We saw a lot of old friends in 2009 and made a lot of new friends. We hope to see you there again this year.  Click HERE to see a YouTube video of the Back Yard Flyer Swing-Wing in action at Oshkosh 2009.

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