Suitable Servo Horns for WTC

[corsaire]

What do you use that works best from your experience?

How do you adapt the servo horn to slide nice and smoothly thru the 1/16"
WTC bulkhead seal opening? And how do you accomplish the servo horn hook-up with the 1/16" rod?

I have one Linear Drive by Sullivan left which I'd love to use but it's too "clunky" for WTC placement.

Thanks,

Brian

[wayne frey]

There is a company called

There is a company called Jomar tha makes a linear conversion for the Futuba servos. Many of the builders here use them, including me.
Look at the link here :

http://www.emsjomar.com/SearchResult.aspx?CategoryID=18

The servos shown to be converted are common and easy to get.
Hope this helps

[JWLaRue]

You could always ditch the

You could always ditch the WTC bulkhead seals and go with something that is far less prone to leaking and doesn't require a nearly perfect linear motion:



I use these bellows on my custom-build Seehund dive module. These will likely never leak since there is no rod-to-seal motion. The bellows expands and collapses as necessary to handle the motion of the pushrod.

-Jeff

[corsaire]

Wayne / Jeff,
Wow, I just

Wayne / Jeff,
Wow, I just didn't know about that new little new gadget: the Futaba linear servo converter. After a long hiatus from the hobby I see there are quite a few new gadgets out there for us bubbleheads.
Since I have to buy servos anyway and rather not undo the bulkhead seals I'll go with the adapters.
The bellows is an excellent option though if I were to build my own WTC from scratch, for the next sub perhaps.

Thank you guys,

Brian

[wingtip]

or you could just use

or you could just use these which work for JR or Futaba servos

http://www.miniatureaircraftusa.com/Sto ... inear&pg=1

[PaulC]

Dave,

How do those work?

Dave,

How do those work? I've not seen them before.

[JWLaRue]

Paul,

I use those nice items

Paul,

I use those nice items as well. They're called a "Scotch yoke". I've created an animated GIF image showing how it works when used on a servo. Click on the image below to launch the animated image:



<< in the name of full disclosure, the above GIF is a modified version of the one found on the wikepedia page for the Sctoch yoke and is used/modified based on the Creative Commons Attribution ShareAlike 2.5 License. >>

I like these much better than the LineDrives because the yoke is a more robust device and you won't have to worry about the LineDrive cable breaking. (I've had several do that)

-enjoy,

Jeff