SIG Pushrods.
 

Hi.

I have a question about the sig push rod set up on the Four star 40 ARFs. They have a metal rod that goes into the nylon rod for the linkage set up on the rudder and elevator. how does this work? Do I glue the metal rod in with epoxy? I don't see anything about this in the manual.

Shane

RE: SIG Pushrods.
 

The metal rod just slides through the nylon housing.

RE: SIG Pushrods.
 

Are the metal rods threaded?

If so, put the threaded end into your drill and tighen it down. Then "drill" the non threaded end into the nylon rod. Keep drilling it in until the first part of the threaded end begins to thread into the sleeve. Let it thread in about a quarter inch or so. Then you'll screw your clevis onto the remaining threads.

Repeat the same thing on the other side, but this side might need to be tweaked as far as its length is concerned so that when the servo is centered, the surface is also centered. YOu would do this adjustment first my cutting the nylon rod to the right length. You can then vary the amount of metal threaded into the sleeve. And lastly make any minor adjustments by adjusting how far on the clevis is screwed.

Hope this helps.

RE: SIG Pushrods.
 

if this is threaded method then make sure when you size it to take onto account the clevis being on the threaded ends.

RE: SIG Pushrods.
 

You might need to check on this subject further. I am building a Sig Something Extra which has the same type installation.. The posts I found complained about trim changes in hot weather. Because of this, I replaced inner nylon tubes with 2-56 rods. Outer tubes remained the same..Fred 123[&:]

RE: SIG Pushrods.
 

aerobatixkid, On the rods, You push the unthreaded end into the nylon
tube up to the threads on the other end, then screw it in about 1/4", then
screw on the link on the remaining threads of the rod... But as fred123
said they do require retriming for temp. changes, and are a bit flexable
... I replaced mine on my 4*60 with C.F. rods and used the same outer
guides, It was a BIG difference!!... If you do go with metal rods, IMO I
would go with 4-40....