National Aeronca Association Bulletin Board

After multiple calls to Parker's Cleveland Wheel and Brake division
I have found that replacement Wheel and Drums for The Cleveland DMB mechanical brakes are available. Original part # 3050 / Cleveland part # 40-7. 2008 list prices were a Painful $3460/each.

Wag Aero has an STC'd Brake Conversion kit OEM #SAR8 for the 7EC which shares the same gear leg/axel as the 11AC,BC,CC. Per Tom O'Neil at Wag Aero the kit will fit an 11CC gear leg/axel. The Kit is about $2K.

What I need to work out is a way to attach an aviation grade master cylinder to my 11CC toe pedals +/- remote reservoir and line routes.

Given that I would spend around $7k to replace the mechanical brakes that would still have a 500hour inspection AD, investing around $4K to get brakes that would have parts for the next 20years and no AD seems like a reasonable goal. My FSDO will consider a well planned and executed conversion.

There is another thread in this forum about Toe Brake conversions for 11AC, held by the late Buzz Wagoner. Has anyone done this conversion and was it for hydraulic brakes? Could you supply details?

Burl Rogers also holds an STC for hydraulic brakes on the 15AC sedan which had the same sand cast brake pedals as the 11CC. Anyone have this conversion and is also willing to give details?

shep
I think I would fix what I have. When properly maintained and adjusted the mechanical are fine. Install new Bowden casings and cables and you will be surprised how well they work. Don't use a liquid lubricant, try powdered graphite. If its the AD on the DMB's that's bothering you the Goodyear mechanical disc could be an option.
Paul

It is the AD that bothers me. I presume the AD exists because the wheels are prone to cracking. I'm in my mid 50's and hope that I can fly another 20 years.

I suspect that the available wheels will be consumed secondary to cracks over the next 20 years and that the new available wheels are NOS.

I am restoring my plane and the fuselage presently has all fabric and attachments removed Now would be a good to remove the old chromate and add the needed weldments prior to re-finishing the fuselage.

The hydraulic brake conversion for a Chief does not look realistic at this point. Are goodyear mechanical disks hard to find and get parts for?

You can still get parts for the Goodyears. I have some extra wheels and such and the Luscombe people have some hard to find spares.

If you keep the brake rotor clips in the wheels, they are reliable. Only other issue is to check them for cracking.

Joe A

Are the Goodyears for sale? I will pay a fair price for airworthy, rebuildable wheels and brakes.
I think I will finish the rebuild with the Clevlands and keep a set of Goodyears in reserve should the clevelands crack

I didnt know there was such a thing as a mechanical disk brake. shows
what I know. Brakes on my 48 11CC are shoes and got a spare set
with the airplane. Havent looked at the wheels close as of yet, so dont
know if cracks are in my near future or they are already there. Shep
said he hoped to fly another 20 years. Thats where I am right now and
am in hopes I can wear out a lot of my neat little airplane before I check
out. ITs in like new condition, however I cant say the same for myself.
All my parts are still working however and no cracks, SO FAR. 75 and
holding. My 48 Stinson -3 had juice brakes that took the place of cables
and they were a bothersome deal with the tube from the reservoir leaking
thru the O ring because of vibration and a drop of fluid would happen
every now and then making a little mess. couldnt stop it. units cost around 1300 bucks. worked good, but messed up under the floorboards.
OH Well. had to bleed them often from the wheel up. Cleveland.

Ok all, been going through my old files and found something that Mike Brudjar kindly shared with me a while ago, and that I had not found the time to post.

There is the 337 and all approval paperwork that Mike and his IA used to install hyd brakes on his 11BC!









Hope this helps.

Joe A

Photos, but not sure whose they are.

Joe, I really appreciate the help. It will take some work but I think will be worth it in the long run.

Thanks again.

Shep,

Thats why he sent them to me, so that it was easier for the next person. Really good data, and good to share.

Joe