Dave,
Yeah, I can see it now. While you are
enjoying a blissful, quiet flight, the people and small animals nearby are
bleeding from the ears. That would be really bad for the rotary movement.
Mark
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of David Staten
Sent: Monday, May 09, 2005 5:04 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: center
rotor OFF
Ok... so whats the solution for all the people who are nearby when you
fire the engine up? Your neighbors, etc?
Dave
Mark R Steitle wrote:
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)