Mailing List flyrotary@lancaironline.net Message #52796
From: <Lehanover@aol.com>
Subject: Re: [FlyRotary] Re: Finite Amplitude Wave was Sausage Re: EM2 Numbers
Date: Tue, 2 Nov 2010 21:52:49 EDT
To: <flyrotary@lancaironline.net>
In a message dated 11/2/2010 5:33:25 P.M. Eastern Daylight Time, keltro@att.net writes:
Lynn,
   Correct me if I am wrong but turbocharging a periferal port Rotary engine would then be like
turbocharging a piston engine with a extreme overlap camshaft.........Not a good idea ??........
Lots to think about for that. The step up onto the cam (jn piston engines) would be very detectable. Once you have enough boost to overcome the back pressure and dilution, the ride would be worth the work.
 
Some of the energy is spent just pushing the exhaust gasses further down the header, but the net result is still a boosted engine. Low RPM torque would be minimal. Another advantage of boost is to overcome reverse flow caused by a late closing intake. Should some insane person port the intake too high. Better at the top end much worse at the bottom. Plus it is typical to use low compression rotors which gives even worse bottom end torque. It is done in street cars and drag racers.
 
Short duration cams in turbo engines help the poor bottom end performance. Not much of a problem in sort of constant speed aircraft use.
 
Lynn E. Hanover
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