Does The Bellcrank Position Really Matter - Maybe

Food for Thought. Made with Igor in mind.

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Lots of features.

1. Initial yaw and Max. yaw can be set with stop screw

2. The whole package drops into a wing receiver. Mount on a
set of rails in the wing and access thru the bottom.
Servicable control system without surgery.

3. Addition of another stop screww opposite to the one show allows setting min. yaw.

4. Won't crack, chip peel or dent for 20 years or your money

5. Actually not to bad to set up.

back.

Great pictures Dick, it looks even better then my logo crank. Looks like another difference between your and our metric word. We have screws in packages 5 or 10 or 20pcs, and you have 6, 12 ... so if you buy 6, you need 4 for engine, 1 for BC axle and that one is over, so you what at least use it to adjust your gismo ... good idea

But I do not know why so complicated. It needs little more trivial (screw free) approach, I see I must really do some pictures. Could be they are better than my english ... and this is not joke. I see it is really necessary.

So keep warm and wait for them ... learning coreldraw ...

BTW does your tricky device count with force in pushrod? That force can be 2x stronger than that force in lines. ... just note for those who want really try it

" BTW does your tricky device count with force in pushrod? That force can be 2x stronger than that force in lines. ... just note for those who want really try it"

Hmmmmm...... the wingover would look good.
Seriously though, placing the arm's pivot point as close to the pushrod connection point or past it would help this. Shorten the pivot arm.

You are right about pictures and it applies to people who speak the same language. I can't imagine trying to describe this with words only.

OK, so look to new thread "Yaw and leadouts on pictures after all"

Aside from friction and/or mechanical losses that you get when the bellcrank is not mounted pretty close to the CG it matters not a whit where it goes - all that really counts is where the lead-outs emerge from the wing tip (or line guide) and its relation to the C.G. (read W. Netzband and/or contemplate the "Gyrator"). Just for laughs I've put bellcranks in all sorts of odd places (in sport models) and they all work just fine - if the leadouts emerge from the wingtip in the proper place.

Nagio Forbes

Ah.... but I have no line guides.