Need Set of Tcraft BC 12 D Pedals

[swift1b]

Hank
Could you take some measurements of the pedals on you uncovered TCraft fuselage. The distance from the center of the attachment (pivot) point to the top of the pedal would be useful to determine values for different arm lengths.

bob

[Laz]

Maybe someone can remember better than I can, but someone did make a replacement pedal for the original T-craft brake pedal that was oval. It had a cross hatch pattern and was rectangular. Whatever you do , do not make them too big, they are easy to activate when you do not want to.

[Hank Jarrett]

I have a pedal in front of me right now. The heel contact plate is 2" high and 1.2 inches wide (oval). The tube the pedal pivots on is 5/8" diameter and the distance fromthe center of the pivot to the center of the contact plate is just about 3". The distance from the center of the pivot to the holes for the brake cables are 2" and 2 7/8". As I remember the lower hole was for the brake cable and the upper one was for the return spring.

[Hank Jarrett]

Looking at the pedal I think it would actually be easier to make new ones from a weldment than a casting. A piece of tube at the base with a piece of "T" section for the arm welded to a piece of curved steel for the contact pedal. Changing the moment arm would be easy by moving the attach point on the "T" section. It would also be easier to attach the master cyl to the steel than modifying the cast aluminum.

[3Dreaming]

No return springs on the brake pedals. The top hole is where you attach the parking brake bridle.

I have a set of pedals I bought a couple months ago with some other stuff. I though I might need them sometime, but I guess I would be willing to let them go.

[swift1b]

Hank:
Thank you for the measurements!

bob

[Hank Jarrett]

DANG! That's right! I was thinking of the springs that keep tension on the rudder pedals. I think I am getting Old Timmers!

Hank

[astjp2]

I would CNC them from billet aluminum before welding them up...

[Hank Jarrett]

Whether to use CNC or welding is usually a choice made based on availability of a CNC machine or a really good welder. I like CNC, but have a really good welder available. ;-)

[swift1b]

Hank

I am not familiar with the CNC process. Could you enlighten me?

[3Dreaming]

Hank

I am not familiar with the CNC process. Could you enlighten me?

It is a process for controlling a machine by computer. It can be programmed to do intricate machine work, such as machining a new pedal out of a chunk of aluminum.

[Hank Jarrett]

Works great and produces beautiful parts, but a bit expensive.

[Mike S]

DANG! That's right! I was thinking of the springs that keep tension on the rudder pedals.

Sorry for the thread drift but I should replace the springs on my rudder pedals. Presently they appear to be hardware store screen door springs with many years and coats of paint on them. Does anyone have a source or a picture of how they should be?

[Hank Jarrett]

Honestly every plane I hav looked at they DID look like screen door springs. That may have been what they used in 1946! Taylor was known to use what was available and the door springs seem to work just fine (without the paint or rust).

[Norm G]

I installed a set of Scott hyd pedals and Cleveland wheels and brakes in my 1941 BC12, Got a field approval for the setup. They are more than I need but they work great with 850/6.

Norm G