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1. 05:50 AM - Re: Cabin noise (Rich Ellis)
2. PM - stick it in a cute blonde tonight! 15 (jan)
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--> Tailwind-List message posted by: Rich Ellis <rjrellis@yahoo.com>
Red,
Very interesting information. It would be of most
interest to see the difference in db before and after
noise deadening was added to your W10. rle
--- red <redswings@reds-headers.com> wrote:
> I've got some:
>
> O320 W-10 with 8lbs of sound barrier and absorber;
> and upholstery
>
> dB taxi climb 2500
> cruise 2000cruise
>
> Ear level 92 108 108
> 102
> Windshield 93
> Lap 87
>
> I have since changed mufflers and gotten about 2 dB
> less in cruise. I want to try the dive to 250 with
> closed throttle and see what that noise level is, as
> suggested. that would tend to isolate wind noise
> from engine noise. For the record, same meter, same
> w10, before any door seals or sound deadening, but
> with upholstery, 117 at high cruise! say what?
>
> Cessna 180, not generally thought of as a quiet
> a/c,1953 with O470U, Beech mufflers, no sound
> deadening on firewall,standard windshield and side
> windows, same categories, same meter
>
> 86 102
> 98 94
>
> Red Hamilton
> 374WT
>
>
> ----- Original Message -----
> From: Dave Conrad
> To: tailwind-list@matronics.com
> Sent: Thursday, May 06, 2004 8:11 PM
> Subject: Re: Tailwind-List: Cabin noise
>
>
> It would be interesting to know what the same
> meter would read in a Cessna 172 or warrior. Dave
> Conrad
> On Thursday, May 6, 2004, at 08:19 AM, DaveM
> wrote:
>
>
> I visited Red Hamilton at Ft. Bragg, and we got
> to talking about noise levels in the Tailwind. He
> has been taking readings in his new one, and adding
> some sound deadening material. He loaned me his
> sound meter, and I took the following readings in
> N168A (Clement trike) on the way back to Yolo
> County. Thought the group might be interested.
>
> Here are the results:
>
> DB Taxi Runup Climb
> Cruise (2500) Slo Cruise (2000)
> Ear level 94 104
> 106 104-6 94
> Windshield 93 105 108
> 109-114 95
> Lap level 90 104
> 107 106 94
>
> As you can see, the levels are fairly high, no
> matter where in the cabin it is measured. I think
> the meter is set to average sound intensity over a
> short (1 sec or so) interval.
> Dave
> N202Q
> N168A
>
>
=====
Richard L. Ellis, M.D.
Gundersen Lutheran Health System
Co-Director
Norma J. Vinger Center for Breast Care
1900 South Avenue
La Crosse, WI 54601
800.362.9567, ext. 52102
rjrellis@yahoo.com
__________________________________
http://hotjobs.sweepstakes.yahoo.com/careermakeover
Message 2
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| Subject: | it in a cute blonde tonight! 15 |
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