REFLECTOR: Auto engine installed 172

Don Johnston don at numa.aero
Fri Nov 12 07:06:32 CST 2010


What bugs me is that there are now parking spaces for "hybrids" but I can't
use them with my VW TDI. :-(


Subject: Re: REFLECTOR: Auto engine installed 172
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <4CDC9E9C.2070503 at awpi.com>

Wikipedia says the Prius THS II engine is 37% efficient.
The Volkswagen 3.3L TDI engine is 41.1% efficient which they are showing
as a SFC of .33, which is a little better than my Franklin.

So, that Prius engine is pretty small and doesn't get better than the
TDI engine.  Why didn't they use a TDI engine instead?

My guess is weight, and power requirements.
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