The Timm Aircoach, also called the Timm Coach and the Golden Shell Special, was a custom-built, high-capacity, high altitude aircraft for charter flights.

Al Menasco had a shop nearby where he modified engines.

The Aircoach was a single engine, conventional landing gear equipped biplane with an open cockpit for two pilots and enclosed passenger cabin.

The fuselage was made of welded steel tubing with plywood covering.

[3] Data from Jane's all the World's Aircraft 1928,[4] Aerofiles:Timm[5]General characteristics Performance