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04-19-2009, 09:48 AM
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Join Date: Aug 2007
Location: S21, Oregon
Posts: 161
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Dent in aileron push tube
I came across this dent AFTER I had cut them to length (naturally). Had I noticed it before, I could have cut it off. It's about 5" from the end, and MAYBE 1/16" deep. Obviously a big enough dent will surely weaken a tube under compression. Do you think replacement is neccessary, or more of a "feel good" precaution? I'll send the pic to Van's, but thought I'd get some feedback here while I waited for them to reply.
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Kelly
RV-7 empennage done, wings done, fuselage to QB stage.
1973 Maule M4-220C flying
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04-19-2009, 09:59 AM
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Join Date: Aug 2005
Location: Pasadena CA
Posts: 2,484
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You are building a $75k+ airplane... I'd just replace it now before you do the work. It'd probably be just fine, but why go through the work of finishing up a sub-standard part?
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Stephen Samuelian, CFII, A&P IA, CTO
RV4 wing in Jig @ KPOC
RV7 emp built
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04-19-2009, 10:19 AM
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Join Date: Mar 2006
Location: Evansville, Indiana
Posts: 661
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Like many, I have replaced parts simply for cosmetic reasons. This one really has safety of flight issues though. I once talked to Ken at Van's about my vertical stabilizer spar that I had scratched rather deeply. He said that there are two reasons for replacing a part. One is if it really is compromised and two is if it is going to bug you every time you think about it. I think this probably falls in the second category so IMHO replace it for peace of mind.
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Steve Eberhart, W9JUQ
3EV - Evansville, IN
Where is Steve and the Sky Terrier?
RV-7A Slider, O-360 A1A, Catto 3 blade, 2 screen Garmin G3X Classic, GTN 650, Bionics APRS. FLYING since June 24, 2009
EAA Chapter 21
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04-19-2009, 11:20 AM
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Join Date: May 2008
Location: Houston, Alaska
Posts: 292
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Structurally it is probably fine, but replace it anyway otherwise it will bug the snot out of you when your in some good turbulence and it's all you can think about.
schu
Last edited by akschu : 04-19-2009 at 11:22 AM.
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04-19-2009, 11:25 AM
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Join Date: Nov 2005
Posts: 452
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Push a ball bearing thru, just big enough to enter the tube. Use a broomstick as a plunger. It will virtually remove the whole dent.
Or as others said replace.
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EJ
RV7 flying
xp360, CS, All Glass cockpit
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04-21-2009, 11:32 AM
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Join Date: Aug 2007
Location: S21, Oregon
Posts: 161
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I heard back from Scott at Van's yesterday, and the consensus is that it would probably be OK, but they'll cover the cost for a new tube. Sounds good to me! It also gives me another excuse to drive over the mountains and pick up some other stuff 
Yet another confirmation that we've all chosen the best planes to build!
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Kelly
RV-7 empennage done, wings done, fuselage to QB stage.
1973 Maule M4-220C flying
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04-22-2009, 11:29 AM
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Join Date: Sep 2006
Location: Trento, northern Italy
Posts: 621
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do it
replace it, do it.
@ the top of your first loop you have other things to do
my 2 cent
ps: I've just ordered the push pull tube due to the 'probably' short cut - as per plan (I don't like to have only 1/2 thread inside) |
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