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1/4 turn wing fixings

Where have they gone?

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Peter Miller22/09/2018 10:43:23
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Many years ago we had a range of wing hold downs that only needed a 1/4 turn to lock themin place.

The two examples shown come from my box of bits.

quarter turn latches.jpg

The black one is a Dzus 090 one, the other is IM. They always worked and were great especially on a cold day (Not that I fly in the cold these days)

I found a company in the USA that does the Dzus type but suspect that if you only want a few they don't want to know.

Does anyone know if and where they might still be available.?

NOTE The SLEC one is not nearly as positive

 

Edited By Peter Miller on 22/09/2018 10:45:26

Martin Harris22/09/2018 11:23:11
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Not exactly the same but these look like they have possibilities - maybe very useful for those awkward ARTF wing fixing bolts that are inserted through the fuselage sides into the wing roots?

RS Components aren't the cheapest of suppliers but when you factor in the free postage they can be very good for small items.

I've ordered a pack...

Peter Miller22/09/2018 11:31:37
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I saw those but could not work out how they worked.

Edited By Peter Miller on 22/09/2018 11:32:16

Martin Harris22/09/2018 11:45:49
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In the absence of any comms engineers with experience of these particular fixings, I'll report back in a couple of days...

Peter Miller22/09/2018 12:17:18
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I will lok forward to your comments

Tom Sharp 222/09/2018 12:40:20
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Spitfire cowlings were held on by quarter turn fasteners, so if they were go enough then.

Peter Miller22/09/2018 13:30:39
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Lots and lots of things were held on to all aircraft with Dzus and Oddie fasteners. I have corns from doing them up and undoing them.

But they are not long enough to hold a models wings on. and Oddie fastners are not near;ly as secure as Dzus types.

The advantage of Oddie fastners was that they only needed to be lined up with the paint marks and could then be just pressed home.

Oh, and for models it is easy to make a scale working Oddie fastener with a countersunk screw and and a press stud (also know as a dress snap.

Stephen Smith 1422/09/2018 18:42:02
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http://rhf.co.uk/southco/?gclid=EAIaIQobChMI3dTw7pPP3QIVSZPtCh1mmwDfEAAYASAAEgKsb_D_BwE                       

Or most places that sell race bike stuff

Edited By Stephen Smith 14 on 22/09/2018 18:42:59

Peter Miller22/09/2018 18:53:34
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The trouble is that very few of them (None that I have found anyway) that are long enoufgh to go throught a wing and ply plate etc, As per my photo

eflightray22/09/2018 19:45:46
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For plug in wings --- Emotec Magnetic Locking System --- **LINK**

But very expensive. (spotted in a thread on a well known USA forum).

Just guessing, but I imagine they operate similar to security tags on clothing, where a magnet is required to release them.

.

Biggles' Elder Brother - Moderator22/09/2018 20:00:30
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Wow! Nice, but 80 euros?!

BEB

Peter Miller23/09/2018 08:20:35
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Sounds good...but my complete models don't cost that much!!! (not counting radio and powere units)

Andrew Dunn 123/09/2018 09:14:57
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not sure if these might be too heavy or not ...... https://www.carbuildersolutions.com/uk/dzus-fasteners-2

Ron Gray23/09/2018 10:03:49
1038 forum posts
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Might be a good subject for 3D printing?

Ron Gray23/09/2018 10:13:43
1038 forum posts
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A quick search found this, sure it can be modded for our use!

**LINK**

Peter Miller23/09/2018 10:23:53
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Most metal ones tend to be too short. The thngyverse 3D printed ones have possibilies if the material is strong enough.

Ron Gray23/09/2018 11:02:29
1038 forum posts
273 photos

I don’t think they would have to be too strong would they? After all, the main forces exerted on a wing aren’t in the plane that the fixings are operating in. I would say that they would have the same strength as nylon wing fixing bolts.

Peter Miller23/09/2018 12:03:04
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Quite possibly. Most of the loads woould be pure tension. Sheer loads would mainly be in the event of a tumble.

Ron Gray23/09/2018 13:00:41
1038 forum posts
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Just got to get my 3D printer, it will be soon!

Martin Harris24/09/2018 11:58:34
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Posted by Martin Harris on 22/09/2018 11:23:11:

Not exactly the same but these look like they have possibilities - maybe very useful for those awkward ARTF wing fixing bolts that are inserted through the fuselage sides into the wing roots?

RS Components aren't the cheapest of suppliers but when you factor in the free postage they can be very good for small items.

...and quick! They arrived this morning @ 08.00 - not bad as I ordered them late on Saturday morning...

However, they won't be suitable. They are push fit into a 3/8" square hole where they expand 4 leaves (one just visible at the back of the left hand component) to grip - quite a hard push at that. Release is 1/8 of a turn and very easy - it uses the ramp visible in the pictures to click out. They really need to be used for sheet metal or rigid plastic but might possibly work for thin ply components with occasional use.

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