the rudder and fin? The print shows 1/8th of an inch. I'm doing scale hinging with tube, wire and gudgeon. So should I go with the amount of space shown on plans or is this not the correct spacing and I should know something else about this? It's a Meister Zero so you know what I don't know what I'm talking about.
Here's a couple of pics.




And maybe you can tell me if I can use the same number of the hinges the real plane used, 2 instead of three as is called for on the plan.
Thanks, Jim.

Try to get the hinge gap as close as possible. They draw it on the plans with a gap so you can tell where the fin stops and the rudder starts. But if you can get it even closer that is better. Large gaps are more likely to flutter. I'd use three hinges.

Being a full scale jetmech...please don't say fin...it's a vertical stabilizer and rudder or a horizontal stabilizer and elevator.....Sorry I am ok now....
Agreed get the gap as close as possible. When I use pinned hinges I cut out a little for the raised part of the hinge to set into....yes it does decrease the throw some but closes the gap and I have never come close to not having enough throw.
As far as the number of hinges I would probably do 3
Good Luck

Yea, but it's easier to type "fin"

Fin, tail feathers, whatever, works for me. I retired to get away from that A&P stuff long time ago. It's a hobby, call it a gobber snout if ya want.

I've been reading so much on this subject my head is all truned around. I've even read where some are calling the fin (vert. stab.) the rudder and the rudder the fin. I know from my days of driving boats that the rudder swings. But not everyone has driven boats so it's understandable.
But to get to the point, I'll be using three grudeons (as advised) and hope there long enough to resist the stresses of the yaw. Thanks.

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Is "gobber snout" supposed to be hyphenated?

As close as you can get them without binding at full throw. As to flutter, gap has no bearing on helping or hindering it. However, the smaller the gap, the more effective the response for the same amount of throw.

Thank you Rodney. That is the definitive answer.