Stevo Posted July 23, 2014 Share Posted July 23, 2014 Hi All. Got a S/H aircraft that has an exceptionally stiff elevator linkage. It has separate elevators, with two pushrods - typical Blackhorse or Seagull. The links need to come out and be replaced. So I need a coupler.. I'll try and describe what I need ... It's around 12mm diameter, 20mm long. It has three holes, around 2mm diameter from one side to another, so that the centre one will take a central pushrod from the servo, and the two outer ones house the pushrods to each elevator. All three are locked in place by a grubscrew. I've tried looking for coupler..pushrod.. adaptor and various other things. Yep I can make one but it would save a bit of faffing around!! So, what's it called? C'mon, you know what it is... could anyone find one? Edited By Stevo on 23/07/2014 19:20:27 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted July 23, 2014 Share Posted July 23, 2014 Why not solder them together Stevo..the 3 piano wires I mean Do away with the doodah ? John Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 23, 2014 Author Share Posted July 23, 2014 They would need soldering together in the airframe and not a lot of room, and too close to the plastic pushrod guides - wouldnt want to melt them Blackhorse and Segull ARTF's usually have them (the doodahs), and they are so adjustable and quick to set up.. One of these... Edited By Stevo on 23/07/2014 19:39:01 Quote Link to comment Share on other sites More sharing options...
Tim Cheal Posted July 23, 2014 Share Posted July 23, 2014 Could you use an electrical connector (the plastic block things with small screws). I have used them to clamp together control wires, but don't see why you couldn't leave three connected for the use you need? Tim Quote Link to comment Share on other sites More sharing options...
cymaz Posted July 23, 2014 Share Posted July 23, 2014 Tim, you mean these?? They are very useful Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted July 23, 2014 Share Posted July 23, 2014 Hi Steve . Have a look at this set up very strong . Snake outer's MUST be securely fixed at both ends and ideally supported at a couple of places in the middle .The connector is a piece of carbon fiber sheet but could be made from ali paxolin etc . The screw fixing it to the snakes are 14 mm long hex head servo screws these are a nice fit in the snake will not pull out or come loose as snakes will snap first . Edited By Engine Doctor on 23/07/2014 20:55:29 Edited By Engine Doctor on 23/07/2014 20:58:42 Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 23, 2014 Author Share Posted July 23, 2014 Great!! Aha got it now. Thats an interesting way to do it! All my snakes are supported at regular intervals and at both ends anyway - particularly when using the Sullivan ones. Whats the dual switch arrangement on the right?? And still no one has found the item Edited By Stevo on 23/07/2014 21:25:01 Quote Link to comment Share on other sites More sharing options...
Mike Etheridge 1 Posted July 23, 2014 Share Posted July 23, 2014 I had the same problem on the Super Air I finished refurbishing the other week. I used a 3 terminal 15 amp 'fixed connector' to link the twin elevator push rods to the servo. A bit clumsy but it worked. ED's arrangement looks very neat Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted July 23, 2014 Share Posted July 23, 2014 I've used servo horns as the link with ED's method but I'm not sure how you would do it with wire pushrods. Here's what you are looking for - or wait for a clubmate to whoopsy a BlackHorse model Edited By Bob Cotsford on 23/07/2014 22:07:50 Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 23, 2014 Author Share Posted July 23, 2014 Bob gets the prize!!!!!Now try and find one in the UK Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted July 23, 2014 Share Posted July 23, 2014 good luck on that, Google failed Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted July 23, 2014 Share Posted July 23, 2014 Wanted add Stevo ? Must be loads in peoples bits box's John Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 23, 2014 Author Share Posted July 23, 2014 Probably quicker to make my own...Thanks everyone!!! Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted July 23, 2014 Share Posted July 23, 2014 Sullivan S558 / S559 looks interesting. **LINK** and of course, our favourite Chinese importer make a very similar version **LINK** Quote Link to comment Share on other sites More sharing options...
michael cawood Posted July 24, 2014 Share Posted July 24, 2014 any old consumer unit (electric box ) will have brass earth/neutral bars that can be cut to size to make these. mike Quote Link to comment Share on other sites More sharing options...
kc Posted July 24, 2014 Share Posted July 24, 2014 Possibly this is the item Stevo needed, anyway it's hard to find but GiantShark sell them - Full Direction Elevator Arm Quote Link to comment Share on other sites More sharing options...
Gordon Skene Posted July 24, 2014 Share Posted July 24, 2014 Gliders Distribution have what you want go to aircraft spares duo linkage coupler Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted July 24, 2014 Share Posted July 24, 2014 Hi Steve the twin switch is for redundancy. I lost a very nice model a couple of years ago due to a cell failure. Since then any decent or large model is fitted with dual batteries and switches . These also have a diode fitted to stop them draining one another should one fail. The model pictured is a Luscombe Silvair - ish . its about 10.5 foot span and is powered by a Moki 30cc petrol Quote Link to comment Share on other sites More sharing options...
Levanter Posted July 24, 2014 Share Posted July 24, 2014 Stevo. If you are still looking send me a pm with your address. I am sure I have a few lying around and spare. You are welcome to one. Quote Link to comment Share on other sites More sharing options...
Mike Etheridge 1 Posted July 24, 2014 Share Posted July 24, 2014 Good idea Mike, these or similar should be available at an Electrical Wholesaler Quote Link to comment Share on other sites More sharing options...
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