Mailing List flyrotary@lancaironline.net Message #51718
From: George Lendich <lendich@aanet.com.au>
Subject: Re: [FlyRotary] Re: Tie Down Hardpoints
Date: Mon, 19 Jul 2010 08:17:11 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
 Thomas,
Well that's a new one on me.  Sound to me you might be getting confused with Anodized Aluminium. I know lower grade stainless can pit because of electrolysis in extreme environments and because of that they use 316 ( marine) grade. I know carbon grade stainless can rust
However if anyone can confirm this I would appreciate hearing further about it.
George ( down under)
I think I want to stay away from the stainless because it will be completely enclosed in fiberglas.
Stainless needs to be exposed to an oxygen environment in order to for that protective layer (chrome oxide) that prevents further oxidation.

At least that's what I've been told/read.



 Thomas,
I agree with Tony, use something that won't rust, nothing looks worse on the exterior of a plane. Maybe consider stainless steel, I use it on everything.
George (down under)
Hey Tony.
Now I'm looking for the tie down hardpoints (either parts or specs) referenced on page 25 of the 'A' kit manual.

I have not found them in the drawings either.

They say thay are Cad plated steel. I can have them made but I would be guessing.
Maybe .125  3" x 3.5" plate would suffice with a threaded steel bushing welded to it and then plated.
I figure the bushing threaded/tapped 1/4" x 28 could be 5/8" material ... maybe. ... or 3/4".

Any Ideas?

Thanks.

T Mann

Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster