Speed,Combat,Scale,Racing > Combat

Bellcrank movement

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Casey:
What is the effective movement range in degrees for a 2 inch bellcrank in a Nostalgic combat model?

john e. holliday:
I have never used a 2 inch bell crank in the old combat planes.  In that period of time it was the Veco 3 inch.  Also used what area the space between ribs allowed.   The control horn is where I adjusted for elevator deflexion. D>K

Paul Smith:

--- Quote from: Motorman on September 07, 2020, 03:43:35 PM ---I would stay with a 45 degree max each way.

--- End quote ---

That's a good number for ANY crank arm mechanism.  Beyond 45 degrees each way, 90 degrees total, the actual output is minimal.

phil c:
+/- 45° is about right.  I used that on quite a few  Fast combat planes 1992-2002.  Pushrod in the inner hole.  The balance point was far enough back to make it responsive.  It allowed me to put the bellcrank on the boom and still clear a bladder tube behind the spars, pretty much on the CG.
It worked quite well.

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