Help wanted: need ID and supplier for 1940s turn-and-release bolt

I had some a couple of years ago from www.hall-fast.com

They were commercial fasteners, but identical to the old aircraft ones. Perhaps your certification method might allow their use.

Thank you Bruce, a good pointer. Our aircraft being Annex-II allows us to certify our our parts ourselves to a certain extent, which makes life a lot more easy indeed.

I had some a couple of years ago from www.hall-fast.com

They were commercial fasteners, but identical to the old aircraft ones. Perhaps your certification method might allow their use.

Bruce

Hi Eric

I don’t have any, sorry. You’ll find that the pins holding the parachute boxes are about 3 cm long but the one for the tailplane fairing is only about 12.5 mm long (half an inch, you know what I mean).

I can get the guys at Oxford to measure them if you need.

Best wishes for the New Year to all the gang

Dave W

Thanks Dave, we’ll measure as soon as the fuse is in the shop again. There’s a couple of other things to finish to more modern gliders first (including a 9,000-hours inspection).

Hi Eric

I don’t have any, sorry. You’ll find that the pins holding the parachute boxes are about 3 cm long but the one for the tailplane fairing is only about 12.5 mm long (half an inch, you know what I mean).

I can get the guys at Oxford to measure them if you need.

Best wishes for the New Year to all the gang

Dave W

Sorry Eric I had a look but could not find any in the workshop.

Dave

Thanks for looking Dave. We’ll find some somewhere though.

Yep, as seen here, the oring also is designed to absorb vibrations

http://www.savigny-oddie.co.uk/oddiefasteners.htm

Thanks. I don’t see any vibrations being an issue in this aircraft though, since it is distinctly lacking an engine.

Used on motorbikes too, don’t know if right length

http://www.classicmotorcyclespares.com/index.php/default/frame-forks-wheels/fasteners-fixings.html#Frame,_Forks_&_Wheels

Sorry Eric I had a look but could not find any in the workshop.

Dave

Yep, as seen here, the oring also is designed to absorb vibrations

http://www.savigny-oddie.co.uk/oddiefasteners.htm

They also require a small rubber retaining ring to be fitted once the Oddie fastener is through the panel to make it captive and “floating”. Small neoprene rubber O-rings are easily and cheaply available for this, though I don’t know what the situation would be for a flying aircraft. Original stock rings would probably be perished by now.

Anon.

Thanks Anon, that is news to me, I have only seen them without (on gliders). Have suitable o-rings though, so will find out what’s the better option…

Eric

They also require a small rubber retaining ring to be fitted once the Oddie fastener is through the panel to make it captive and “floating”. Small neoprene rubber O-rings are easily and cheaply available for this, though I don’t know what the situation would be for a flying aircraft. Original stock rings would probably be perished by now.

Anon.

Also standard on the Proctor

Good one, let me get back to you on that one. The bit they fit on (the fuselage) is in storage until the end of January due to other workshop engagements.

What length and diameter do you need?

They were used post-war on Meteors and probably other types as well.

Anon.

Thank you Jon, that looks indeed to be it. Never heard of it until today, but we have similar ones on other aircraft. They seem to be restricted to British-built aircraft…

Looks like an Oddie fastener

http://www.savigny-oddie.co.uk/studs.htm

Jon