|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

02-26-2016, 04:17 PM
|
|
|
|
Join Date: Oct 2007
Location: Boston Area
Posts: 284
|
|
Crowsfoot adapters for torque wrench
It seems like I need something like a crowsfoot adapter to be able to torque the aileron bellcrank nuts which sit behind a flange. AN4 nuts are 5/16" nuts which is not something in the common sets available around here.
Where did you pick yours up (for AN3 and AN4) or are there other solutions to torque things like the bellcranks?
Thanks.
__________________
Jeff
RV-14A
Status: Wings complete(ish), Working on: Empennage. Fuselage kit on order
Location:MA
http://vans14a.blogspot.com/
|

02-26-2016, 04:47 PM
|
|
|
|
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 662
|
|
I took a 5/16 open wrench, heated it and bent it 90*. Not exactly torqued to spec, but I'm sure it's close.
__________________
Jim Averett
RV-8
TS36 - Silver Wings
Fredericksburg, TX
|

02-26-2016, 05:32 PM
|
 |
|
|
Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,861
|
|
I bought a set of Craftsman crowsfeet from Sears.
__________________
Todd "I drink and know things" Stovall
PP ASEL-IA
RV-10 N728TT - Flying!
WAR EAGLE!
|

02-26-2016, 05:49 PM
|
|
|
|
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,261
|
|
Yep might as well bite the bullet and buy a set from Sears.
__________________
Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
|

02-26-2016, 08:02 PM
|
|
|
|
Join Date: Oct 2007
Location: Boston Area
Posts: 284
|
|
Sorry for the basic question, let me check sears. All the other places I checked have sets that start with 3/8" which is too large of course for the AN3/4 size.
Thanks
__________________
Jeff
RV-14A
Status: Wings complete(ish), Working on: Empennage. Fuselage kit on order
Location:MA
http://vans14a.blogspot.com/
Last edited by JDBoston : 02-26-2016 at 08:04 PM.
|

02-26-2016, 09:27 PM
|
|
|
|
Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 1,056
|
|
Even with a crowfoot that is a difficult place to get the wrench to. I ended up taping the end of the correct box wrench inside the jaws of the largest set crowfoot to make it a long crowfoot - then torquing that assembly. Weird and I have no pic but it works. There is a weird bending arm you have to avoid putting your force vector on the wrong direction to get it right.
I saw in Home Depot a few weeks ago a flexible socket shaft. The torque on a flex shaft is the same as a straight shaft and if I was doing it again I would probably use the flex shaft to make it easier and I'm sure it would work fine with either a crowfoot or a straight socket. Using that it would be socket->flex shaft->longer extension->wrench outside the hole. I've seen long debates about whether torque readings on a flex shaft are valid. But worry not, the torque is as read and the nut is giving everything back the wrench/socket gives it - or it would move. Now if you torque and change the amount of flex, then you bring inaccuracy. I think you minimize this by holding the rigid extension in fixed place while turning the torque wrench and by measuring the running torque in the same configuration.
__________________
Ser 104142, RV-14A flying - N1463 
Ser 83825, RV-8 building - N8638? 
USN Ret, Urologist, AME, Repeat Offender
Last edited by JDA_BTR : 02-26-2016 at 09:33 PM.
|

02-27-2016, 06:48 AM
|
 |
|
|
Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,861
|
|
Quote:
Originally Posted by JDBoston
Sorry for the basic question, let me check sears. All the other places I checked have sets that start with 3/8" which is too large of course for the AN3/4 size.
Thanks
|
Huh? A 3/8" inch wrench/socket is the size for an AN3 (3/16") bolt / AN365-1032 nut. A 7/16" wrench/socket is the size for an AN4 (1/4") bolt/ AN365-428 nut.
__________________
Todd "I drink and know things" Stovall
PP ASEL-IA
RV-10 N728TT - Flying!
WAR EAGLE!
|

02-27-2016, 07:03 AM
|
|
|
|
Join Date: Jun 2005
Location: Raleigh, North Carolina
Posts: 1,128
|
|
Harbor Freight
Before you drop a ton of money on a set from Craftsman that you'll only use a couple of times, check out the cheap but adequate set from Harbor Freight.
The saved money will pay for some Avgas for you. 
__________________
Tom Norwood
Classic "Short Tail 6A N822PM
TMX-O360. Phase 1
|

02-27-2016, 07:07 AM
|
|
|
|
Join Date: Jan 2012
Location: Northeast Ohio
Posts: 685
|
|
Buy a set of crowsfoot wrenches
Third vote for a set of Craftsman crowsfoot wrenches or similar. They will also come in handy to torque the flair fittings on fuel and brake lines as well.
Just remember when using a crowsfoot on the end of a torque wrench, it is necessary to compensate for the extra length (or not) depending on the position of the crowsfoot relative to the torque wrench. I have posted how to make the calculations at the following link:
http://www.dogaviation.com/2014/01/c...-for-fuel.html
Happy building,
__________________
John
www.dogaviation.com
RV-12 Wings, Empennage, Fuselage, Finishing, Avionics and Powerplant kits all completed
Now Flying!!
Donation paid until September 2021
|

02-27-2016, 07:20 AM
|
|
|
|
Join Date: Oct 2007
Location: Boston Area
Posts: 284
|
|
Quote:
Originally Posted by Auburntsts
Huh? A 3/8" inch wrench/socket is the size for an AN3 (3/16") bolt / AN365-1032 nut. A 7/16" wrench/socket is the size for an AN4 (1/4") bolt/ AN365-428 nut.
|
More specifically ms21042-4 which is what is called for (not an4 as I mentioned) is 5/16" for the nut.
__________________
Jeff
RV-14A
Status: Wings complete(ish), Working on: Empennage. Fuselage kit on order
Location:MA
http://vans14a.blogspot.com/
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 08:31 AM.
|