Here is the
answer to the muffler
problem. Active Noise Control. No big, heavy, draggy muffler
needed.
<snip
from “Canadian Driver”
article>
…Active
Noise Control is unique to this vehicle. Active
Noise Control (ANC) uses sound waves generated from the audio speakers
to
cancel out any booming noise from the powertrain. The ANC controller
uses a
microphone to detect any noise and then generates a signal 180 degrees
out of
phase to cancel out the original noise.
<snip>
Mark S.
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Russell Duffy
Sent: Monday, May 09,
2005 2:24 PM
To: Rotary motors in
aircraft
Subject: [FlyRotary]
Re: center
rotor OFF
I'm thinking
this would not be a good
plan. For the piston engines you referred to, I bet they have a way to
control the valves with solenoids so the deactivated pistons aren't
producing
compression.
Actually they do have
compression. No fuel or fire.
OK, make me
look it up :-) Apparently,
they stop the valves from opening, rather than leaving them open. I
couldn't find anything that gave details of exactly what point in the
sequence
they stop the valves, so the cylinder could either be full of air
(silly and
wasteful of power), empty of air (would cause vacuum that would be as
bad as
the compression force), or perhaps somewhere in between.
Here's the
best article I found,
though with annoying ads. Don't forget about those active controlled
engine mounts to smooth out the 3 cylinder operation in economy
mode. Just boggles the mind what they'll do to make improvements in
economy.
Rusty (Great
Plains VW 2180
running, and for sale)