Mailing List flyrotary@lancaironline.net Message #30711
From: M Roberts <montyr2157@alltel.net>
Subject: heat output
Date: Mon, 13 Mar 2006 18:23:10 -0600
To: <flyrotary@lancaironline.net>
Thomas, while there is probably more hydrocarbon (fuel) being ejected from the combustion chamber ports of a rotary than a non-race  reciprocating engine , I think you will find that its already being burned in the header pipes - that is one of the reasons for the Rotary's hotter exhaust.  So great idea, but I believe you will find its already ignited in the 1700F+ temps of the exhaust. 
 
Humm, so if its already ignited, then all we need to do is shape a rocket reaction chamber shape and get additional thrust......  On the other hand, I think a turbo charger would probably be a more effective use of that exhaust energy.  But, that's just my opinion and it might be interesting to see if any thrust would result.  Monty???.
 
Ed
 
Really the only way to get it back is turbo-compound, not that I am a big advocate of turbocompounding, but it will work if you have the budget and the burning need. Turbocharging does some good, but you can only use it effectively if you have variable pitch prop. The fuel consumption numbers for all out power get really ugly, plus you are working the snot out of the engine and trying to cool it in thin air, and turbo's really prefer to have the turbine inlet temp south of 1600f.
 
The rocket:
 
sure just put some nitrous in there with some extra fuel and you can have a JATO. Rotary equivalent of the afterburner, guaranteed airshow crowd pleaser ;-)
 
I'm all for smoke flames and noise! (in a semi-controlled fashion of course)
 
Monty
 
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