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Date: Tue, 10 May 2005 11:12:10 -0400
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: center rotor OFF
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cardmarc@charter.net wrote:

>Look at the latest engineering of these engines. Audi does it for one of many. The valves are electronically controlled. Since you cruise at a small % of power, you shut off the power you don't need for accelleration, etc. The cylinders come on as needed automatically. Of course you also could just throw the engine out and get a smaller engine for that part of the trip, which is exactly what lots of hybrids are coming to. 2 engines, one for to and one for cruise!
>Marc
>  
>
>>From: "Jack Ford" <jackoford@theofficenet.com>
>>Date: 2005/05/09 Mon PM 10:49:42 EDT
>>To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>>Subject: [FlyRotary] Re: center rotor OFF
>>
>>That entire variable cylinder configuration routine seems to me to be a lot 
>>of (old) advertising hype. The concept seems to be that the public thinks 
>>fewer cylinders burn less fuel, so you can have your eight cylinder cake and 
>>eat four cylinder fuel. Purest balderdash.
>>
>>    
>>

Didn't Cadillac market a 12 cylinder at on point that would disconnect 
the crankshaft to half of the engine for cruise?

Controlling power with throttle means less air in the cylinder, leading 
to less compression pressure.  Doesn't higher pressure equate to more 
complete combustion?  Would running 2 cylinders hard be more efficient 
than running 4 cylinders half as hard?

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