Can I just add one thing to that diatribe - please:
> The thermodynamic facts to take way here are: > 1) An ideal compressor is Isothermal (no heat addition during compression) > 2) An ideal Engine is Adiabatic (no heat loss during compression) and 3) The theoretical efficiency of a heat engine is a function solely of one thing -the difference between the starting and finishing temperatures. Any analogies you can think of? So aircraft cruise as high as they can (ATC permitting), as low intake temps are vital for efficiciency, regardless of the low air density and pressure, which is in fact an aerodynamic boon. Their intakes design and then efficient compressors can (easily) make up the pressure, especially when starting with very low temperatures. Clive Smith |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.