M. Adam Davis wrote: > That is very cool! Although I'm curious how hot the shaft gets > compared to a normal engine shaft. > > -Adam > > On 11/20/06, Rolf wrote: > > >> That is a very cool 4-stroke engine that has only 4 moving parts and 4 >> bearings. >> >> http://www.rcvengines.com/how-it-works.htm >> >> > > When I fly my plane it is too hot to touch for about 5 minutes after landing ... ;-) Remember though that these planes automatically get good air-circulation when running. On the other hand, the back-end of the engine remains cool-ish, and does not appear to damage the wood fire-wall, or the fire-wall's epoxy fuel-proof coating. The issue with the engine is that it has no easy way to adjust the timing ;-) They do have larger scale versions of the same concept used in motorbikes, and UAV's that have the additional features expected from modern engines. See their main page. In the model RC field, they get a lot of raised eye-brows because of the fairly loud mechanical noise generated by the gearing. Typical RC Engines make an exhaust noise only... the RCV engine's mechanical noise is louder than the exhaust noise. Rolf -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist