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Old 10-28-2004, 01:31 AM
Richard Riley Richard Riley is offline
Join Date: Oct 2004
Posts: 14

Originally Posted by phoenix221

So the entire wing/canard of the Berkut is made of carbon fiber only?
I'm not going to get into a discussion on flutter analysis, but I'll give you the basic facts.

The early Berkuts were foam core wings, winglets, canard and elevators. The canard and wing spar caps were carbon, the main wing skin (including aileron skins) were carbon. The canard, elevators and winglet skins were E-glass, the same layup schedule as the LEZ

Later Berkuts were molded canards, wings, winglets, and ailerons. The ailerons, canard and mainwing skins, canard and mainwing sparcaps were carbon. Elevators and winglets were glass. All 2 skin sandwitch over a 5 lb PVC and SAN cores, with ribs made of Eglass over 8 lb urethane core (urethane only for the low cost)

This is the last time I will answer this question on this forum.

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