I am going to install a "close to scale" rudder and elevator pull-pull on my GP Tiger Moth. I have some scale drawings for reference as to the location of the control horns, guides, cables, etc., but I cannot find any information on the rudder bar.

Is the bar like a long tiller that spans the width of the fuselage, or are there bell cranks on either side? Any info is appreciated.

Thanks,

Dave

Hi Dave,

The full scale Tiger Moth has a simple one piece rudder bar, pinned in the middle, that is longer than the fuselage is wide and actually protrudes through a slot in the covering on each side of the fuselage. The rudder control cables attach to the bar outside the fuselage.

My 1/4 scale Clark Tiger Moth appears to have the same mechanism until you look inside the cockpit. There is a separate short bar for each side. It is pinned in the middle with a screw and is free to rotate. The outboard end connects to the rudder cables, the inboard end (inside the cockpit ) to the rudder servo pushrod. The rudder servo sits in the center of the fuselage about 3 inches behind the two short rudder bars.

Hope this helps.

Tom

The rudder cables are attached to a tiller bar that goes out slots in the fuse just above where the lower wing attaches. The elevators were also run off of a shorter vertical tiller bar behind the rear seat. The elevator control cables criss-cross top to bottom before exiting the fuse.

Jim

Here's a tail shot showing how I have the cables running. The upper elev cables run through an eyelet on the leading edge of the stab. The full-size has a short bar that runs through the eyelet with the cables attached to each end of it.

I used braided nylon fishing line for the rudder cables because I didn't want to have parallel metal wires (possible RF noise). They have held up just fine on a 1/4 scale plane. I used the cable that Balsa USA sells for the elevators. If yours is a smaller plane the fishing line should be OK for everything.

Jim

Thanks for the replies.

After posting, I found on the internet some detail drawings of the inside controls, including the tiller bar, and the elevator bar.

Tonight I de-covered the fuselage and tail feathers and started work. I made a rudder tiller from 1/8" aircraft aluminum with a nylon bushing. I have the appx. locations for everything based on measurements from a 1:40 scale drawing. I will be using the DuBro 4-40 size pull-pull kits. I bought 3 of them. They have coated cable, so I should be alright with the double rudder wires.(?)

I picked up an English publication a few months ago that has a lot of detail shots of the different parts of the Tiger. There are times I wish I hadn't, because it made me realize just how crude the GP Moth is. But, I'm working on it!

Again, I appreciate the replies and the pics!

Dave

I know what you mean. When you start studying some closeup pictures of the Tigermoth you realize that there is an incredible amount of detail there.

Jim