alternative push-rod setups for park-flyers?

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wamanning@email.com - 29 Jul 2007 15:20 GMT

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.

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Geoff Sanders - 29 Jul 2007 23:32 GMT

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.

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Bozett95 - 30 Jul 2007 01:37 GMT

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

> i try to give my LHS business, but they have non-existent pushrod
> selections for park-flyers and other lightweights.
[quoted text clipped - 7 lines]
> so i'm wondering if anyone can suggest locally sourced materials and
> setups that can be appropriate for light-weight pushrod setups.

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Mark Miller - 31 Jul 2007 01:43 GMT

Bozett95 <Bozett@DONT.SPAM.Me.hotmail.com> wrote in news:rpari.30006
$2v1.25815@newssvr14.news.prodigy.net:

> 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

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?

>> i try to give my LHS business, but they have non-existent pushrod
>> selections for park-flyers and other lightweights.
[quoted text clipped - 7 lines]
>> so i'm wondering if anyone can suggest locally sourced materials and
>> setups that can be appropriate for light-weight pushrod setups.

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wamanning@email.com - 01 Aug 2007 00:43 GMT

on the light side.

AUW is rated @ ~10oz, although the aforementioned bits for the rudder
retrofit will add some weight.

w

> How big is your plane?

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Model Forum / Radio Controlled / Air Models / July 2007

alternative push-rod setups for park-flyers?