flap cable triangle

[DBeaulieu]

For connecting the cable run from the flap handle to the flap triangle plate, what hardware are people using? Direct cable thimble to the plate? I understand about the turnbuckles for the other flap runs attached to the upper side of the triangle but want to minimize distance from the triangle to the center pully below when making the connection. Hope it's clear...pics are helpful!

Cheers (Dave from Maine)

[svyolo]

I think most used turnbuckles. Because you can release tension easily, I didn't see the need for turnbuckles but I did want the cables adjustable, and you can't do it at the flap arm, no space. I used a swaged threaded stud, and a threaded fork for all 3 cables at that plate. Lots of adjustment. The threaded studs look exactly like swaged turnbuckle ends, but have 3 times more thread. They look like they are made by the same company. MS21259 and AN486 are the part numbers. I used them in a few other places for the same reason, primarily because the AN486 has a 3/16" hole instead of 1/4" like most other hardware meant for 1/8" cable.

[DBeaulieu]

Thanks...good idea regarding increased adjustment

[DBeaulieu]

What I ended up doing so far...
flap triangle.jpg

[AZBearhawk272]

One rigging comment. This has to do with a potential failure in a run to the wing that would cause a split flap condition.

Be aware that the triangle yolk piece needs to be located high up enough to allow translational movement towards the connected side, allowing the connected side flap to “retract” and reduce a split flap condition.

Kevin D

# 272

[svyolo]

You can definitely induce a lot of variables rigging the flaps. As best as I can tell, start with getting the flaps to rest evenly on the stops with the springs, and adjust the pushrods to get them symmetrical side to side. Only then would I mess with adjusting cables.

[Pbruce]

Im just curious how high would that need to be? Say, from the triangle to the pulley at the bottom center of the fuse? Mark G specifically suggested that I keep the triangle as low as possible above the pulley. I’m thinking it might tend to provide a more symmetrical pull across the two flap cables that way. On the other hand, I do understand the theoretical benefit of your suggestion.

[svyolo]

At flaps up my triangle is about 10" from the center of the pulley to the center of triangle. Not flying yet (very soon). The way I rigged mine (others chiming in please) is I have the flaps resting on the stops, I adjust the pushrods so the flaps are at the same angle. Then I adjusted the cables at the triangle so the triangle is level, and at Flaps up (bottom detent) the flaps are on the stops, AND the cables (all 3) have tension. I can untension the cables by pushing the flap handle past the bottom detent.

[DBeaulieu]

Hoping to have wings and stuff on by Fall. Will be interesting to fgure things out. Thanks fo the tips/insight.

[Pbruce]

Well, I learned that I should not do any more cabling of the flaps until the wings are mounted again at final assembly. Then I can look at every flap setting an situeion. Thanks guys.