Monday, August 28, 2006

Jerry's Original "Howell V-Four" (V4)

"The engine is 1.95 Cu. In. (32cc) in displacement. Cylinders are 90 degrees apart in order to have the engine balanced for vibration free running. The cylinder bore is .875" and the piston stroke is .812". The cylinder banks are not staggered and robust knife and fork connecting rods are used. The multi segment built-up crankshaft and twin cam shafts are amazingly easy to make. A Hall Effect distributor is driven off the end of one of the cam shafts. The distributor body is linked to the throttle arm for spark advance/retard with the throttle setting. The throttle is my newest proven 2-jet design with an oiled foam air cleaner. " - Jerry Howell

See plan revisions at:

YouTube Video:

Tuesday, August 1, 2006

Jerry running his Howell V-Four

Jerry Howell running his original "Howell V-Four" in his small shop in Colorado Springs, probably in 2006. Dad always liked to put his engines "to work" as seen by the light bulb attachment. Sounds great - hard to believe it's just 32cc!

Friday, February 10, 2006

Jerry's Original "Howell" 2-Jet Throttle

"It is small in physical size, very adjustable and not nearly as difficult to build as it looks. The configuration and size of mounting flange (or a spigot) at the base of the unit is easily modified to suit your engine requirements. The two threaded holes at the top are for mounting an air filter (included in the plans) if desired. Otherwise, a trumpet shape velocity stack may be used instead - or your own special treatment." - Jerry Howell

Sunday, January 8, 2006

Jerry's Original "Howell" Magnetic Drive Engine Water Pump

"This is the high performance water pump I designed for my 'Howell V-Four' engine. Ordinary pumps have a shaft that enters the case to drive the impeller. This requires a lubricated shaft seal to prevent leakage. In miniature sizes it can be a challenge to have a seal that prevents leaks, not create excessive friction on the shaft and be reliable over long periods of time. I designed this pump to satisfy all these requirements. There is no shaft that enters the pump case, so no seal is needed at all. It takes very little power  to turn even at high water delivery rates. The pump housing internal has an easy to produce simulated involute spiral shape with a cutwater for efficient operation and high delivery. The pump is made almost entirely of brass. I nickel plated mine for looks, but that has nothing at all to do with operation or anything else." - Jerry Howell