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On Sep 3, 12:00*pm, Charles Vincent wrote:
wrote: On Aug 31, 10:29 pm, " wrote: Sorry, but that quote does not say the specific technical reason(s) he gave up, just the basic economic idea that i've already heard -- hence the original post. *I wanted to hear a really good reason to not use an auto engine, give readily available magnetos. *Someone eventually said propellor loads on the auto crankshaft. * What? We didn't mention cooling issues, weight issues, PSRU issues, cost issues or anything else? Aren't these good things to consider? * * * * Dan Guess you didn't know that the only thing holding back progress of the auto engine in aviation was the availability of a hundred and twenty two year old ignition design. Charles Guess not. Now we can put a magneto on any old engine and go flying! Considering that the magneto has a much higher failure rate than the old battery point-and-condenser ignition, and therefore we need two of them, I have no idea why, in this age of electronic everything, the homebuilder market hasn't come up with a self-powered electronic ignition module for conversions. It would look like a magneto, and have the rotating magnet alternator to generate some power, but wouldn't use the troublesome points or impulse couplings or distributor and the alternator part would have many magnets, not just one, so that the magneto dynamics that sometimes lead to drive failure wouldn't be there. Dave Blanton found those dynamics in his conversions and had to modify the mag drives to take it. Dan |
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