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02-23-2014, 08:24 PM
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Join Date: Dec 2008
Location: League city, TX
Posts: 544
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Aileron pushrod rod end length
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Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike
2020 Donation gladly paid..
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02-23-2014, 09:38 PM
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Join Date: Dec 2011
Location: Kirkland, WA
Posts: 886
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1/2" would be fine.
The other important variable is that the threads need to be over 1/2 way in the bearings. If you loosen the stop nuts fully and twist the rod all the way one direction and all the way the other, the thread should not come out of the bearings.
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02-23-2014, 09:39 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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From Aurora bearing FAQ section:
What is the minimum thread engagement required to support the advertised load ratings in the Aurora Bearing Company catalog?
The minimum thread engagement is 1.5 times the major thread diameter unless otherwise stated.
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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02-24-2014, 03:04 AM
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Join Date: Mar 2007
Location: Brisbane, Queensland, Australia
Posts: 44
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When assembled, a final safety check involves using something like a paper clip, or 0.032" lockwire and pushing it into the rodend bearing pin hole. The lockwire should not pass through, it should contact the threaded rod. If not, the thread engagement is insufficient.
From the pics provided, rod engagement in the rodend is fine.
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02-24-2014, 07:13 PM
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Join Date: Dec 2008
Location: League city, TX
Posts: 544
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Thank's for the replies on such a critical part!
__________________
Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike
2020 Donation gladly paid..
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02-24-2014, 08:42 PM
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Join Date: Dec 2011
Location: Kirkland, WA
Posts: 886
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Have you already constructed the large aileron pushrods? Many find the stock dimensions 1/4" or more too short. Mine were. They would twist off the rod end bearing when installed in my RV-7A and controls set to neutral. I ended up fabricating a 2nd set 3/8" longer that worked perfectly.
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02-25-2014, 05:00 PM
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Join Date: Dec 2008
Location: League city, TX
Posts: 544
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Russ,
I actually followed your thread and made the 3/8 adjustment to my long push rods. Love the VAF!!
Thanks
__________________
Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike
2020 Donation gladly paid..
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02-25-2014, 05:56 PM
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Join Date: Dec 2011
Location: Kirkland, WA
Posts: 886
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Awesome. Glad that helped!
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07-08-2014, 08:47 AM
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Join Date: Jun 2011
Location: Hope Valley, Rhode Island
Posts: 133
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Target pushrod length?
Russ-
I'm about to the point of cutting my long aileron push rod tubes and I'd like to benefit from your experience. Can you confirm the extra length that you came up with was 66 1/8 and that worked? A close look at your photo seems to show a smidge over 66 1/8.
What length do you suggest I shoot for when cutting mine?
Thanks for your great posts.
-Ivan
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Ivan Luke
Hope Valley, RI
RV-7 SB
Just hung the engine!
2020 dues paid
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07-08-2014, 08:54 AM
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Join Date: Feb 2005
Location: Westland, MI
Posts: 311
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I've already cut my long pushrods to the length called for on the plans. If that turns out to be too short, then I would expect Vans to replace them!
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