i try to give my LHS business, but they have non-existent pushrod selections for park-flyers and other lightweights.
ordering online is like $8 shipping for $2 of stuff.
in this case i need stuff for a rudder and i was thinking i could rig up some sort of DIY pull-pull system, but the servo's location makes this impossible.
so i'm wondering if anyone can suggest locally sourced materials and setups that can be appropriate for light-weight pushrod setups.
Real, honest-to-goodness hardware stores often carry music wire, or, of course, a music store carries it. Spray can nozzle extension tubes can be used as guides for small wire.
You can also obtain free flexible cable from junk throttle cables at lawn and garden equipment repair shops. Bigger sizes are available in the scrap bins at bicycle shops.
You might want to re-do the servo mount and go with your pull-pull system anyway, since it is the lightest. I sometimes just use balsa sticks for real light stuff, provided the rod isn't too long.
Paul
snipped-for-privacy@email.com wrote:
Bozett95 wrote in news:rpari.30006 $ snipped-for-privacy@newssvr14.news.prodigy.net:
FYI, "real light stuff" goes up to the .25-powered Sig Seniorita, which (per plans) has balsa pushrods. I've flown several Snitas with the balsa pushrods and they've worked fine.
I've used balsa pushrods on several of my small electrics, with good success. If you can get your hands on some .025 music wire and decent
1/8" or 3/16" square balsa . . . maybe a little heat-shrink tubing for the ends . . .Dowel is more available than balsa, but ounce-for-ounce you'll get a much stiffer (but bulkier) system from balsa.
Of course, the pull-pull has the potential to be the lightest system, although there are arguably more ways to screw up a pull-pull.
How big is your plane?
on the light side.
AUW is rated @ ~10oz, although the aforementioned bits for the rudder retrofit will add some weight.
wPolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.