Warbird Information Exchange

DISCLAIMER: The views expressed on this site are the responsibility of the poster and do not reflect the views of the management.
It is currently Thu Nov 27, 2014 8:58 am

All times are UTC - 5 hours


Click here to goto Amazon.com


Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: A75 vs. BT-13 brakes
PostPosted: Mon Apr 14, 2008 6:04 pm 
Offline
Sergeant
User avatar

Joined: Mon Jun 25, 2007 9:29 pm
Posts: 58
Location: Sacramento, CA
I'm a new partner in a N2S-5 Stearman... still getting acquainted with the airplane and maintenance.

My understanding is that for many (or most) of the civilian A75's, the original mechanical brakes were converted to BT-13 hydraulic brakes. This is the case with my aircraft.

Is anyone familiar with this conversion? I assume that the caliper/piston is BT-13, but which aircraft does the wheel and lining combination come from?

In other words, when it's time for new brakes, are they BT-13 or Stearman linings (or are they interchangeable)?

Thanks in advance, Tim


Top
 Profile  
 
 Post subject:
PostPosted: Mon Apr 14, 2008 10:54 pm 
Offline
Wing Commander
User avatar

Joined: Sun Dec 09, 2007 10:57 am
Posts: 280
Location: Southwest USA
Tim,

Congratulations on being a new partner in a N2S-5 Stearman.

The 27-inch Vultee BT-13 Hayes type wheels and brakes are larger than the original Stearman Bendix wheels and brakes. The parts are not interchangeable. The conversion changed out the axles, wheels and brake assemblies as well as other parts. In many conversions the original master cylinders were changed out for automotive type master cylinders. Parts are available from several Stearman suppliers. Check the forum on the Stearman Restorers Association site for more discussion on brakes: http://www.stearman.net/

All the best on your new airplane.


Top
 Profile  
 
 Post subject: BT-13 wheels and brakes
PostPosted: Wed Jun 04, 2008 2:47 pm 
Offline
Squadron Leader

Joined: Tue Mar 11, 2008 9:30 pm
Posts: 194
Location: Missoula Montana
I have a pair of 27 inch wheels and brakes for the BT-13 that should fill the bill for your Stearman needs. I do not have axles.
the wheels are 27 inch Hayes with used brake drum linings. the brakes are either old style single-band reversable brakes or more modern twin shoe brakes.
price is $200 per wheel, comes with a decent 4 fastner wheel cover.
thanks
Jim


Top
 Profile  
 
 Post subject:
PostPosted: Tue Jun 17, 2008 5:16 am 
The original Stearman brakes were hydraulic but the wheels were 24 inch. When most of them were converted to sprayers they got 27 inch wheels (handled the higher weight better, better on rough fields, plus the BT-13 type brake is just a better design). To put the bigger wheels and brakes on required changing the axles. Duster's and Sprayer's Supply in Chickisha OK have most everything you'll need when the time comes but alot of guys today are switching to Redline disc brakes (available from Air Repair (www.airrepairinc.com) who also stock just about everything you might need for your airplane.) The original Stearman brakes and the BT brakes are kinda finicky - you're forever adjusting and playing with them, but the Redlines have a really good reputation. I'm just about to order the Redline kit for my airplane.

By the way - there is an automotive type lining that will fit the BT brake shoes but NEVER use one. They'll heat, swell, seize the wheel, and you're upside down in the dirt faster than it took to read this sentence.

Dan


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group