Hall Bulldog Rudder Pedals
Part of The Hall Bulldog Project — documenting Bob Hall's 1932 Thompson Trophy racer.
Explore the Project →Not much survives of the Hall Bulldog’s original engineering drawings, but I did come across this scan of the original rudder pedal design with dimensional information.
The Drawing
Original engineering drawing from Springfield Aircraft Company, Bowles Airport, Agawam, Mass.
This document features the Springfield Aircraft Company letterhead and shows the rudder pedal design in detail. The pedals feature embossed “S” and “A” letters—the company’s initials—along with a decorative concentric circle pattern at the center.
Visible Dimensions
The drawing includes several dimensional callouts:
- Width: 5 3/16”
- Profile dimensions: 3/4” and 1 3/8” visible on the side elevation
The profile view on the left shows the pedal’s thickness and the mounting interface.
3D Model
For those interested in 3D printing or CAD work, an STL file of the rudder pedal is available for download.
Download STL File
(184 KB)You’ll need 3D modeling software or a slicer application to view and print the STL file.
I’m not sure who originally provided these documents to me. If I owe you an attribution, please let me know!
