Phone: (503) 631-3206

Fax: (503) 631-3403

Welcome to the Big Sky Stearman Website! We have a great record, with more than 40 years experience providing the Stearman owner/operator with services to repair his wooden wings by using owner produced parts and FAA/PMA parts. We are a source for aircraft-quality Douglas Fir wing spars. Come check us out today!

Big Sky Stearman

Buy Your Complete Conversion Kit Today!

4 Aileron STC Conversion KIT for Stearman Model 75 - NOW AVAILABLE!

Big Sky is now offering 4 Aileron Stearman wood wing kit and the FAA PMA 4 Aileron modification parts.

Kit includes all FAA PMA parts for the modification of a standard aileron. Several components are pre-assembled to ease the field conversion process. A complete documents package including instructions, drawings and photos is included.


- 4 Aileron Wood Wing Components for Complete Aircraft: $14,990.00

- Aileron Modification Kit: $7,490.00


Call John Pike, 503-631-3206

"After many many years (1986-2007) and allot of work the last two years on the part of John Pike at Big Sky the best flying 4 Aileron servo boosted conversion for the model 75 Stearman is now STC ed!!!!! This will be offered by Big Sky Stearman as a field conversion kit for owners to modify stock Ailerons and wings. Our 450 Stearman finished in 1986 has 1800 hours on this proven design. Increase your roll rate reduce control force and improve cross wind tolerance dramatically with this STC. Aileron modifications are flight and flutter tested."

- Addison Pemberton (Spokane, Wa)
(Pemberton's Stearman Pictured Above)

Click Images for Larger Version
4-Aileron Mod
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4-Aileron Mod
4-Aileron Mod 4-Aileron Mod
4-Aileron Mod
4-Aileron Mod 4-Aileron Mod
4-Aileron Mod
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Lower Aileron after conversion.

Upper Aileron after conversion.


Feel free to contact us at (503) 631-3206, fax us at (503) 631-3403, or E-Mail us at

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