Has anyone good/bad experience using the nylon rudder and elevator pushrods supplied with the Somethin' Extra from Sig?
I consider to change them with the old fasion metal type.
Otherwise it is a great plan I can't wait to fly.

BR
Lars

The nylon pushrods found in the Somethin' Extra and 4*40 get a pretty bad reputation....

The #1 problem with them is usually traceable to the sheath not being WELL glued to each bulkhead (sand the sheath a bit so the glue can stick better)

Also, the portion f the rod outside the sheath needs to be supported by inserting wire. I simply insert the 12 inch rod with the threaded end out, and catch 4 to 6 threads in the plastic rod. Unsupported nylon rod tends to have a different curve at different temperature, giving massive trim adjustment changes. Properly support the rod... and you have essentially no trim changes from 30 F to 110 F.

I had no probems at all. [img]i/expressions/face-icon-small-wink.gif[/img]

My experience:

Unless you enjoy re-trimming your SE every time you take it out, do not use the supplied nylon pushrods.

RJ

I agree that the sig pushrods are not very good. I pulled mine out after watching the effect on a hot day with a friend's 4*60. It would change the elevator and rudder position over a 1/4" on a hot day. I switched to another brand, but wish I had used wooden dowels- they never shrink or grow.

I would use Sullivan Goldenrods and throw away the nyrods. Everytime the temp changes so will the trim.
later daveo

Ummm... Sulivan Goldenrods ARE a type of "Ny-Rod" They are a nylon pushrod. Same temperature expansion as the Sig rods...

Its the way you SUPPORT the rods. If you clip off the sheath right at the place the rod exits the fuselage, and bend the flexible nylon back to the control horn (about 6 unsupported inches in a 4*60) and then have the little 2 inches of metal at the end (clevice and short bit of threaded rod) You've got a substantialy curved, unsupported section of nylon. As temp changes, the flexibilty of the nylon changes, and it assumes a different arc. The arc change may be small, and make a HUGE difference in the control surface position.'

The nylon rod isn't shrinking and growing... its bending.

Support the nylon by having wire in it... (or end the nylon at the place the rod exits the fuselage... and use wire from that pont on) and... no major trim changes with temp change.

The ones I use are Sullivan , maybe Goldenrod is the wrong name. They are steel all they way through
inside a plastic housing. Supporting them is still important . I also like to cross them in the fuse to get a straighter shot out the side. Sorry for any confusion............later daveo