VAF Forums

VAF Forums (https://vansairforce.net/community/index.php)
-   RV General Discussion/News (https://vansairforce.net/community/forumdisplay.php?f=2)
-   -   Torqueing AN818 nuts for vent and fuel lines? (https://vansairforce.net/community/showthread.php?t=140199)

spaceflightmeow 07-25-2016 11:31 PM

Raised "vein" on backside of flare
 
On an unrelated note, the photo shows a slightly raised "vein" on the back side of the flare, caused by the tube extruding into the gap between the two halves of the dies in the Rolo Flair tool. This looked bad, but I torqued the flare as-is and the sleeve seems to crush that vein down into place with no problem.

The pre-made fuel pickup tube supplied by Vans also has a "vein" on the back side of the flare. I figured if it's good enough for them, it's good enough for me.

jarhead 07-27-2016 01:17 PM

Quote:

Originally Posted by rapid_ascent (Post 1097854)
I know a lot of people do the 90 degree thing but I don't think its technically correct.

Leonardo (the helicopter mfr. formerly known as Agusta), Airbus (the helicopter mfr. formerly known as Eurocopter), Bell, MD Helicopters, and Sikorsky all show the 90* method in their Standard Practices Manuals, as well as the formula for when you can't make 90*.

For those who like apps, there is a free iOS app called The Norbar Torque Wrench Extension Calculator (I think Norbar has an Android version as well) that I was "blessed" by our QA Dept. to use when I worked at Sikorsky. We did several calculations manually and checked the answers against the app's answers, and they were always the same.


All times are GMT -6. The time now is 08:18 AM.