International 1/2A engine
02-18-2004, 01:58 PM
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International 1/2A engine
Pictured is a hybrid made from a collection of parts. Norvel, Cox, G Mark, Wasp and custom fabricated crankcase and tankmount.
That makes it a Russian, Polish, Canadian, Japanese, Chinese and American hybrid. The idea was to make a totally self contained unit that could be simply bolted to the firewall without the hassle of a seperate tank and plumbing. The cylinder sits on top of a "deck" that can be rotated to give left or right, or even rear exhaust for those with a tuned pipe. A commercial version would have a cast crankcase dispensing with the Cox components. These were used only because it's much simpler to make a throttle carrier that way.
Performance with the Wasp cylinder is 18K on a 6 X 3 black Tornado prop. Swapping in a Norvel assembly produces 19K. The G Mark throttle has an adjustable airbleed and throttling is very good with excellent transition and a reliable idle below 5K.
That makes it a Russian, Polish, Canadian, Japanese, Chinese and American hybrid. The idea was to make a totally self contained unit that could be simply bolted to the firewall without the hassle of a seperate tank and plumbing. The cylinder sits on top of a "deck" that can be rotated to give left or right, or even rear exhaust for those with a tuned pipe. A commercial version would have a cast crankcase dispensing with the Cox components. These were used only because it's much simpler to make a throttle carrier that way.
Performance with the Wasp cylinder is 18K on a 6 X 3 black Tornado prop. Swapping in a Norvel assembly produces 19K. The G Mark throttle has an adjustable airbleed and throttling is very good with excellent transition and a reliable idle below 5K.
02-18-2004, 06:42 PM
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RE: International 1/2A engine
Hi Lynn,
Yes, although I've had Wasps actually do 19K, most are good for 18,, which is pretty good. I attribute the usually better performance of the Norvels to the good compression seal of the Revlite arrangement.
Yes, although I've had Wasps actually do 19K, most are good for 18,, which is pretty good. I attribute the usually better performance of the Norvels to the good compression seal of the Revlite arrangement.
