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Flap Question

 
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h&jeuropa



Joined: 07 Nov 2006
Posts: 391

PostPosted: Mon Sep 24, 2018 1:24 am    Post subject: Flap Question Reply with quote

On departure we found we couldn’t retract the gear. This is an XS mono wheel with 975 hours.

Examination found a problem with replacement shocks we installed previously. We repaired that problem and the gear would retract but with great effort. When we disconnect FL20 pushrod, the wheel retracts easily.

The past two years we have found the gear difficult and there has been binding or rubbing on the FL20 pushrod near the fuel selector. Sanding that area has resolved the problem.

We decided since we needed to replace the pushrod with a push pull cable to gain clearance under our revised glider wing spars and we had the parts, to remove the pushrod and replace it with a cable.

In doing so I happened to try to raise the flaps just by pulling on the flap cross tube with my hands without the cable or pushrod connected but with the short wings in place. I was surprised at how much effort was required! I could do it but it certainly wasn’t easy. Given the location of the pushrod attachment point, I think the effort required at the gear lever is pretty high.

Has anyone ever tried doing this? How much effort is required? It seems it shouldn’t take much effort to raise the flaps. The cross tube in the fuselage is simple and when one works the flaps with the wings off the fuselage not much effort is required. If this our problem, how do we find the cause?

We’re open to ideas and experiences.

Jim & Heather


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