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Old 01-01-2019, 05:55 PM
Jvon811's Avatar
Jvon811 Jvon811 is offline
Join Date: Mar 2014
Location: Fenton, MI
Posts: 84
Default Missing piece? F-466 Trailing Edge Fillet???

A friend of mine recently purchased an RV-4 and after getting it home and further inspection, we've discovered his airplane is missing a part that mine has... It's the fillet between the fuse/cockpit area and the tailcone of the airplane.

I went back, looked at my set of plans and sure enough, there it is, F-466. My question is, how many (if any) RV's are flying around out there without this? Is is structural or purely a cosmetic/aerodynamic piece? My RV-4 does have this F-466 piece and it seems to have 15+ rivets holding it on making me wonder if it's structural. If nothing else, it gives my friend and I a reason to bend some sheet metal and learn some building techniques.

RV-4 N249P O-320, Warnke Prop, GRT Sport EX

Last edited by Jvon811 : 01-01-2019 at 07:34 PM.
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Old 01-02-2019, 05:00 AM
fixnflyguy fixnflyguy is offline
Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 979
Default Just a fairing

It is simply a transition fairing with no structural value that blends the "square" fuselage to the radius of the belly skins . You could make and install one using solid or blind rivets. If I recall, its only .020" or .025" aluminum , but gives a nice clean look and better aerodynamics.
Bill E.
8A7 / Advance NC
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Old 04-13-2019, 10:30 AM
msnow387 msnow387 is offline
Join Date: Aug 2018
Location: Andover, KS
Posts: 1
Default trailing edge fillet

It is actually .016. The plans call for a 90 degree bend, but is the aft portion of the fillet formed to match the tailcone?
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Old 04-13-2019, 12:06 PM
skiandtom skiandtom is offline
Join Date: May 2008
Location: COlumbia, SC
Posts: 34
Default RV-4 wing trailing edge fillet.

On our (my brother and me) RV-4, I made a cardboard model. When it fit correctly, I transferred it to .016” aluminum. I did not make to 90 degree bend as the instructions show. Mine is one changing radius bend. It looks very good. The front is a radius of maybe 1/4” inch gradually transitioning about a six or eight inch radius. I don’t have a picture of it. We built a -7A and a -4. I have the 7A here. My brother has the -4 there.
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Old 04-13-2019, 12:08 PM
skiandtom skiandtom is offline
Join Date: May 2008
Location: COlumbia, SC
Posts: 34

Yes. The aft end matches the radius of the tail cone.
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