aa-fords.com

I'm considering building a log truck, using a '31 AA cab/chassis/running gear. Before jumping off on this, I have some questions. What brake linkage system was used for semi-trailers in the 1930-31 era? And, what wheelbase should I use for the cab/chassis?

I think your best bet would be vacuum operated mechanical brakes.

Bob

I wonder if that company is still in business? May be fun to try order one!! Show them that sales sheet!!

Just a heads up - depending on your state antique or not you may need a CDL to drive it...

double post

KimVanOrder wrote: ↑

July 31st, 2018, 3:41 pm

I wonder if that company is still in business? May be fun to try order one!! Show them that sales sheet!!

Fruehauf went out of business in 1989. https://www.singingwheels.com/what-happ ... mpany.html

Thanks for the advice, gentlemen. I'm assuming that in the era of the Model A's and mechanical brakes, semi trailers simply did not have brake axles. Is this a fair assumption?

Also, when choosing a chassis to build a log truck project (or any truck with a fifth wheel to pull a semi-trailer), would you choose a 131.5 inch wheelbase or a 157 inch?

I have a vacuum operated brake system for mechanical brakes I might consider selling

wild4679 wrote: ↑

July 31st, 2018, 10:21 pm

Thanks for the advice, gentlemen. I'm assuming that in the era of the Model A's and mechanical brakes, semi trailers simply did not have brake axles. Is this a fair assumption?

Also, when choosing a chassis to build a log truck project (or any truck with a fifth wheel to pull a semi-trailer), would you choose a 131.5 inch wheelbase or a 157 inch?

Do you plan to haul logs with it? if so longer the wheelbase the more stable it is under braking (wont jackknife as easily) but also increases turning radius and physical space it takes up. Most vintage pics ive seen of AA semis is the standard 131.

Also this site would be a great rescource for all that legality stuff and trailer brake questions id imagine as well

https://aths.org/