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have you considered a virtual model? i.e. 3d I have made such models under NDAs for a few 'inventors' . it can be instructive , i have pointed out a few wrinkles as well;-) BTW what you described initially, put me in mine of the Marshall Tri-dyne engine :http://wktodd.webspace.virginmedia.com/animations/Tridyne%20colourised.gif
If you have not already seen it, check out the Doxford opposed piston marine engines. There is a museum and a web site with history and pictures.Hugh
Also take a look at Napier Deltic ---Commer T S 3--- Junkers Diesel aircraft.-- Free piston engines.it May help.Brian
The one I thought of at school (From memory) had one inner and one outer 'piston' and 'cylinder' the 'piston' was offset from the 'cylinder' with the piston spinning inside the also spinning cylinder. I remember getting stuck with sealing, as the 'piston ring' needed to be split at the 'corners' so that the centre ones could centrifuge outwards while the side ones were pushed sideways.C.
QuoteThe one I thought of at school (From memory) had one inner and one outer 'piston' and 'cylinder' the 'piston' was offset from the 'cylinder' with the piston spinning inside the also spinning cylinder. I remember getting stuck with sealing, as the 'piston ring' needed to be split at the 'corners' so that the centre ones could centrifuge outwards while the side ones were pushed sideways.C.Sounds like the Cooley design (pre cursor to the wankel which used the same basic mechanism) www.douglas-self.com/MUSEUM/POWER/rotaryengines/rotaryeng6.htm#coolNot wishing to sound too cynical, but I doubt you will have come up with any basic layout that would be patentable , the are a finite number of cylinder and piston arrangements and they've all been tried before, often many times. Most new engine patents these days seem to have been devised only to circumvent previous patents , there's just not a whole lot of originality left.Bill
Mine doesn't have a crankshaft or output shaft, and only delivers electric current.
Quote Mine doesn't have a crankshaft or output shaft, and only delivers electric current.So we are talking about a free-piston oscillator or a cam engine ? Bouncing pistons off springs , gas or magnetic fields ? (NASA played with this for an in space generator and there's at least one company selling a Stirling cycle free-piston generator for the home) Cams ( ) lots of promise , lots of designs , few have solved the piston-cam interface problem and had any commercial success. Here's one I animated, just out of NDA - http://www.5cycleengine.com/