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For rotorheads that are contemplating using (also the mildly curious) the Flowmaster HP-2 "resonator" muffler,
I installed the HP-2 today on my 20B and was able to do a run-up. Bobby Hughes and I both agree that the exhaust tone is much, much mellower with a deeper tone. My Lighspeed ANR headset had no problem cancelling out this low-frequency exhaust tone. While the overall sound level was still pretty significant, the exhaust tone was much more pleasant to the ears. The ear-piercing, glass shattering, nails-on-the-chalkboard, make-you-bleed-from-the-ears, exhaust tone is totally tamed. The 3-blade M/T prop is the primary noisemaker now. The test took place between two rows of hangars, so I feel that DB readings are not very realistic. I'll take those again out on the ramp and post the numbers. If the HP-2 holds up to the pounding of the rotary's exhaust, I'll be a very happy camper.
Mark S.
On Jan 12, 2008 3:22 PM, Ed Anderson < eanderson@carolina.rr.com> wrote:
They are both used stock Rx-7 turbos. one is the
older model pre 89 and the second is a later model 91 year. They
both appear to be in working condition in no nicks on the blades and they
spin. I used compressed air to spin the compressor wheels to they were
really whizzing along.
One came with my 91 turbo block and the other was given to
me.
Ed
----- Original Message -----
Sent: Saturday, January 12, 2008 3:46
PM
Subject: [FlyRotary] Re: URL for
HushPower
Well,
then we just have to keep on looking for a
"justification" for you/your area/etc. :)
Just wait, I'll find
something! :)
Thomas
How about: "..... I have
two turbo sitting in my shop......."
...are they new/used?
What's the scoop on them?
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