On Wed, 9 Nov 2005 02:11:58 -0500, "Morgans"
wrote:


"Roger" wrote

We have several SR-22s and those suckers are loud. I was surprised
that they make more noise than most of the Bonanzas and 210s.

That is the very first I have heard anyone say that about SR-22's. Is it
all prop noise, or is there a good share of engine noise that could be
helped with a bit of muffler? Inconsiderate pilots carrying too many RPM.s
too far out?

Surprisingly, unlike the 210 or Bo, the SR22 makes most of the noise
with the exhaust. They are large diameter free flow pipes and with an
IO-550 on the other end make a rather distinctive sound quite
different than that of supersonic prop tips of the T-6 and Bo with a
2-blade prop.

I am not one to be anti aviation (in the least!!!), but I say that at times,
we are our own worst enemies, in regard to watching our noise.


With the Bo and 210 you only have to drop the RPM down to cruise,
which I do as soon as I'm high enough to have a selection of
"just-in-case" sites at hand.

Certain planes do seem to have more of a problem, for sure. At OSH every
year, I cringe at the T-6's blasting out of there, like there is not another
person in miles, and that everyone loves to hear their props. I love the
sound of power, but there is a point at which one has to think about what
they are doing, IMHO.

I've threatened to get some guys to bring in their T-6s and Vultee
Vibrators to do some early morning pattern work. The FBO durn near
had a case of appoplexy :-)) I wasn't serious, but he's a tad
sensitive about that. OTOH if I had the money I'd be flying either a
T28, or Skyraider out of there. :-)) Man, that skyraider is one BIG
airplane. That huge engine has a low note that just about shakes the
ground. So, if you hear of a Skyraider noise problem at 3BS you'll
know I won the lottery.

The problem with the T-6 is that long, 2-blade prop. The tips go
supersonic just past the cruise setting.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com