Wots Wot - aileron linkage help

[Simon B]

Hello folks. I've got most of my build done, but i've lost the manual and i'm unsure how to join the top and bottom ailerons. Has anyone got any pics of theirs I could see? I think I get how I'd do it, but want to err on the safe side.

[ben goodfellow 1]

i had one of these years ago , brilliant with a st 90 g ring.. if i remember it had a 1/4 dowel with m2 studding set in each end and a clevis on each end

[John Lee]

I'm also having to cast my mind back years. I used cut down control horns - just 1 hole left - on the top of the bottom aileron at the trailing edge and bottom of the top one. I then linked them with 2mm Irvine pushrod sets.

[Concorde Speedbird]

Here is what I did for my Domino (click fot larger image).

Cut down horns, bicycle spoke and clevis at one end.

CS

[Simon B]

Cheers chaps. I've used sawn off horns as per suggestion. Just need to hook it all up and test it now :D

[Braddock, VC]

I don't know what size engine you have in your plane but I would seriously consider fitting 3 mm rods between lower and upper ailerons with 3 mm clevises if you have a 61 or larger engine in it.

I don't think the 2mm bike spokes are fit for purpose when they are over 3 or 4 inches in length.

On my ultimate bipe I used 3 mm rods with a 3 mm ball joint one end and a 3 mm clevis the other, this makes dismantling the plane easier.

If you are committed to 2 mm rods, then reinforce them with either brass or aluminium or carbon fibre tube epoxied over the rod to stiffen it up.

Just my two p.

[Simon B]

I haven't decided on the size of pushrod yet. Carbon rods seem tempting though

[Engine Doctor]

Hello simon . I hav'nt got any pics to hand but using normal horns fixed to the ailerons you will get differential between the top and bottom aileron. to get the same movement I have found it best to make horns from paxolin or glass fiber sheet that slot into the aileron from the trailing edge . Fixing them like that you will get both ailerons to move the same and get smoother control . For rods I have used some thin carbon tubing with some short lenghts of threaded rod cyano'd into the ends then for the clevis to be screwed on to . The ends of the carbon tube will have to be bound with some thread and coated with some cyano as it splits very easily. this makes very stiff , strong and light rods .

[Steve Hargreaves - Moderator]

I'm with ED here.....connecting the ailerons via horns mounted on the ailerons themselves produces all sorts of horrible movements & differential because of the "rotation" of the horns. Some epoxy fibreboard (or similar) let into each trailing edge & epoxied in place is much better. Join these together with a length of metal rod with a threaded clevis at one end. Since the link rods are often quite long too, slip a length of carbon tube over the metal rod (again epoxied in place) to stiffen it up & stop it bending....