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Old 08-17-2022, 06:05 PM
BillL's Avatar
BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 6,920
Default Clarification

Originally Posted by Taltruda View Post
If I had a -7, that’s what I would do.. especially because that -9 rudder feels just too big and stiff. Those folded trailing edges feel sweeter. Isn’t the vertical different too? Like the -7 crowd would need to change the stab and the rudder together? I thought the -8 balance tab was smaller and doesn’t fit the -7 stab..
The original 7 release came with the same-as-the-8 rudder also the same as counterweighted 6 rudder with .020 skin. Let's call it the 7Short. The vertical on the 7 does not change with the rudder. I have both, the 6-8-7short hanging in my basement, 7tall/9 on the plane.

Vans shipped free tall (aka -9) rudders for early 7 serial numbers after they did spin testing and a test pilot did not like the recovery response.

A number of the inflight failures, broke the rudder, broke the forward VS spar, and folded down the HS spar - -maybe in that order the first pieces to hit the ground were the upper section of rudder w/counterweight.

These are all facts listed in reports.

What I would like to know: How much flutter margin (if that is the real issue) changes with the rudder change on a 7? I get vertigo just reading about flutter.

Last edited by BillL : 08-17-2022 at 06:15 PM.
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