Needle settings for a OS 50 heli.

[belair]

Can anyone give me the factory or most common needle settings for a OS50 heli engine? Also what glowplug would you use for this engine?
Belair

[Ade_Law]

enya 3 or OS 8

1.5 turns on the main needle
about 20degs anti clockwise of horizontal (when its sitting in the heli) on the mixture screw.

Ade

[belair]

Ade to the rescue again.
Thanks for your help.
Belair

[Janek]

My OS50SXH setting (in two R50's) are a bit richer on the low end, and a bit leaner on the top end in comparision to Ade's settings, but there probably isn't much in it.

My OS50's run very cool, but have lots of power

[belair]

How do you do that "at the low end and top end"?
Belair :?

[Ade_Law]

the idle mixture adjustment screw is also called "the low end needle"

same goes for the main needle too.

Ade

[Janek]

Doh, sorry Belair, I shouldn't have dipped into techno speak !

"Low End", it the idle adjustment needle, which is the little screw located between the "prongs" of the U shaped, copper, "thing" on the side of the carb, just next to the mixture needle. The screw, which is actually a cam, only rotates about half a turn in total. The "neuteral" setting is with the screw slot parallel with the two "arms of the copper U. As I said it only rotates a very small amount, therefore any adjustment of this screw will be tiny.

The "High End" is the knurled knob, which is the main mixture adjustment. This has a little spring clip, that makes it "Click" when turned. Therefore if someone says "I richened it by a couple of CLICKS" you'll know what they mean (after you read and understood what I've written below )

Both of these two adjustments, RICHEN the mixture when turned in a anti-clockwise direction (i.e. undoing them), and LEAN the mixture when turned in a clockwise direction (i.e. doing the up)

Clear now ?

[belair]

That's clear now Janek, thank you very much. I'll try it out this week-end.
Belair