Open ended Torque wrench or getting tricky?

[cdeerinck]

How do most of you torque AN fittings?

Every torque wrench I find is for a socket, but to tighten an AN fitting with a hose, that won't work.

I remember someone having some type of "trick", like finger tight, and then turn some amount more, but how much? Is that safe to do, and is that the same for all AN fittings?

 

[pilot2512]

Crows foot?

 

[az_gila]

Vans "alternate methods" here -

https://www.vansaircraft.com/pdf/Torque_Spec_Aluminum_Fittings.pdf

 

[Mike S]

Snap On makes a torque wrench with interchangeable heads------including open ended ones.

Great for doing nuts on a constant speed prop.

https://store.snapon.com/INTERCHANGEABLE-HEAD-CLICK-TYPE-TORQUE-WRENCHES-C629538.aspx

 

[fl-mike]

Crow's foot at 90 degrees. No math!

https://www.motorcraftservice.com/renderers/torquewrench/wrench_formula_main_en.asp

also: http://www.robins.af.mil/shared/media/document/AFD-091006-042.pdf

see page 6-5

 

[cdeerinck]

Awesome!

Wow, you guys delivered in spades!!! Thank you!

 

[JonJay]

Vans "alternate methods" here -

https://www.vansaircraft.com/pdf/Torque_Spec_Aluminum_Fittings.pdf

I use this method exclusively. You will find it very difficult to get a torque wrench on many of the fittings. Also, I have seen more damage caused by misuse and misunderstanding of torque wrenches than if you just guessed at it. The alternate method also leaves me some nice marks on the fittings along with a dab of torque seal, I know it was torqued. (that doesn't mean don't check at next CI).
Put a wrench on everything!

 

[erich weaver]

Crow's foot at 90 degrees. No math! QUOTE]

Cant imagine anyone getting the math wrong

 

[terrye]

AN fitting wrench

Snap on makes a series of "Flank Drive, Flare Nut Deep, Inches, 12 Point"
AN85086B 3/8" to AN85089B 9/16"
And
AN850810B 5/8" to AN850817B 1-1/16"
https://store.snapon.com/CROWFOOT-1-4-DRIVE--C629587.aspx

I have the 9/16", 11/16' and 13/16"

 

[Jesse]

Crow's foot at 90 degrees. No math!

https://www.motorcraftservice.com/renderers/torquewrench/wrench_formula_main_en.asp

Exactly right, although I just use this for prop lugs.

 

[rgmwa]

Combination spanner (open one end, ring on the other) and electronic spring balance to measure the pull required to get the torque value specified for the fitting.

 

[BillSchlatterer]

From Vans and my favorite because I can remember it

Alternate Tightening Method Two:

The second alternate method of tightening is very simple and
easy to remember. Bring the nut to hand tight and then rotate a
quarter of a turn. This applies to all sizes. Mark the fitting as
indicated in the flat method to confirm the quarter turn.

.

 

[JonJay]

From Vans and my favorite because I can remember it
Alternate Tightening Method Two:
The second alternate method of tightening is very simple and
easy to remember. Bring the nut to hand tight and then rotate a
quarter of a turn. This applies to all sizes. Mark the fitting as
indicated in the flat method to confirm the quarter turn.
.

Yup - Not sure how to calculate this one from Crabandy, or if one even needs to (not picking on you, very creative)

 

[Bob Kuykendall]

Crow's foot at 90 degrees. No math!...

But... What about the 0.8 factor?

 

[krw5927]

But... What about the 0.8 factor?

NOOOOOOOOOOOOOOOOOO!!!!!

 

[LettersFromFlyoverCountry]

I hate to confess it, but I actually always did the math when using a crows foot.