So i have this rudder on my jersey skiff www.aeromarinerc.com/component...3367c4f21b0.jpg

and i dont know how to get the control arm on the rudder?
how do I?
Anything is appreciated

PLEASE SEE bottom for urgent second question
-ben

Im no "expert" but It would be best to try to mount it directly at the pivot point of the hinge. If you dont it can do funny things, as far as the travel is concerned. As it moves, you want the horn to stay on a central axis of the pivot as much as possible. Im probably not saying it right. I hope you can follow what I mean.







I think this is the traditional place for this rudder just make sure to mount the horn in such a way that the pushrod holes are toward the front of the rudder,and overhang the pivot point. It seems the horn has the small overhang to accommodate this.

Thank you very much now i know where to put it but how do i get it on it seems like i should drill it but there is no way i can do that because my holes wont fit for sure

Thank you very much

-Ben

Elaborate.

I think the screws may be #2-56
heres a chart that may help you find the right bit
en.wikipedia.org/wiki/List_of_...l_and_tap_sizes

based on the chart a 3/32 or .09375 drill bit should be between a close and loose fit for a 2-56 if thats indeed what it is. SIZE IT! dont take my word for it's size.

I wouldn't be to concerned about where the arm is located. However, what is important is the relationship of the leading edge of the rudder's blade with respect to the center line of the pivot. To far in front of the pivot's center line will make the rudder very sensitive & require less servo force to turn it. To far behind the pivot's center line will make the rudder much less sensitive & require more servo force to turn it. I always put the leading edge of my rudder blades on the center line of the pivot shaft. The first photo shows a rudder arm mounted directly to the 1/4" pivot shaft. The second shows an arm mounted behind the pivot.

Jim Allen

Jim your pictured control arm is on the pivot same as I suggested.
You can ingore this, as it isnt the biggest deal in the world, but If you dont mount it on the pivot then the entire horn travels foward/reverse versus rotating on the pivot axis. The alignment of the control arm and exit hole is much less of a hassle when you mount it on the pivot . Unfortunately this isnt a custom rudder, as youve shown so I was going with what he showed without trying to re-engineer the entire rudder.

Pictures are worth a thousand words.It seems there is much less angle deflection on the control arm with the horn mounted on the pivot

Not to hijack the thread or go too far off topic, Jim please tell me about the turnfin pictured. Is that blue tempered steel?
Looks menacingly cool and very sharp.

The skid fins in the photo & the additional photos are machined from spring steel. They are blackened with steel blackening solution to prevent rusting. Machining is done in a special fixture, with carbide tooling, that allows machining of the wedge from the front edge to the trailing edge. They are 1/16" thick & have a depth of 1/4" in the water at speed when used on straight away boats.

Thank you All VERY much i understand that now but i do have one more question.

I understand that this should go in another topic but i was bending my jeresey skiff stuffing tube today and i kinked it and then i bent it back and i split it. The Stuffing tube came with the aeromarine jersey skiff and at the end it is a little smaller to fit into the strut. What can i buy for a replacement? it does not need to be a direct replacement i just need it to work

Thank you and sorry for the other question.
Ben

You can buy stuffing tube material in your local hobby shop.