Honda 500cc V-twin engine converted to run on compressed air

This engine was originally purchased new and retrofitted by engineer Paul Trentham.  He had been hired to take over by Terry Miller's partner when Terry gave up the air car project due to health problems.  When the project was finally abandoned, Paul gave the engine to the University of Washington and they used it successfully in their nitrogen car.  This project was undertaken by Abe Hertzberg and members of the U of W aerospace engineering faculty.  Several scientific papers were published as a result of the university's experiments and the car was used quite a bit around campus.  Finally I was given the engine and had time to clean it and take pictures before I had to pass it on to someone else since I was leaving the country indefinitely.  For more information on the engine and how it was designed and built, see the introduction to my book Air Engines.

#3: AS IS

right valve-head (in front)

throttle (on left)

chain & sprocket valve-op gear (on right)

intake/front end on left

exhaust/back end on right

output shaft on left

#4: AFTER CLEANING

front/shaft/intake/throttle end

shaft lower right

throttle handle upper right

5: THROTTLE ASSEMBLY FROM FRONT

intake hose remnants stuffed with rage to keep dirt out

6: RIGHT SIDE OF ENGINE

exhaust hoses removed & hose barbs stuffed with clean rags

7: VALVE GEAR ASSEMBLY FROM RIGHT

8: THROTTLE ASSEMBLY FROM ABOVE RIGHT

9: FROM BACK

10: VALVE GEAR ASSEMBLY FROM ABOVE BACK

11: FROM LEFT SIDE

12: THROTTLE ASSEMBLY FROM LEFT

13: VALVE GEAR ASSEMBLY FROM LEFT

14: VALVE GEAR ASSEMBLY FROM LEFT

 15: LEFT CYLINDER WITH VALVE-HEAD REMOVED

gasket is intact

piston is at top of cylinder