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    A New Method for the Design of a Three Arc Cam Lobe

    A few years ago, 'awake' posted his algebraic and CAD drawing solutions of the geometry of a three arc cam here: Cam Calculations SOLVED! (But is there an easier way??). He asked if there was a simpler method. Well, yes there is. I've attached the .pdf file below. The article concentrates on...
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    For Sale Sold Locally: Books on cam design and grinding for IC engines

    Valve Gear Design, Michael Turkish, 1946. A complete compendium of information on the design of the three arc cam and its variants, and the design of ring cams for radial engines. At this time cam designers were beginning to use algebraic equations to overcome the high jerk of three arc cams...
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    Mery Explosive Vapor Engine: Getting 'Er Running

    I've assembled my Mery engine and am working on the auxiliary systems. I have compression on both sides of the engine and will check for equal compression this week. It will be run on propane and I have a demand regulator built to Jerry Howell's design. What should the pressure at the tank...
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    Rotary valve for GEARS 2008 engine kit

    I'm building the 2008 commemorative engine from the Oregon Gears 2008 show. It is single cylinder double acting with a rotary valve. I've spent some time trying to understand the drawing for the slots in the valve that control the inlet and exhaust timing. I expected to see one pair of slots...
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    Mery Engine Piston Rings Won't Seat

    I'm chasing various problems with my Mery Explosive Vapor Engine. It ran upon completion but poorly and I have been chasing various problems. The big one is the piston rings have not seated. I motored the engine for about 4 hours with lots of oil hoping that would do the job but a pressure test...
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