Updated: 13-Mar-2017
Not a specific aviaton manufacturer but they built aeroengines for their use in terrestrial and marine vehicles like bicycles (with example below), canoas, trineos, etc.
"Nice view of the Aero Thrust"
The company is the Aerothrust Engine Co from La Porta, Indiana. It used the trade mark Aero Sled.
Engines of AEROTHRUST ENGINE CO
We have no more detailed engine information for this brand. We continue our search. Any help will be appreciated.