Today's Message Index:
----------------------
1. 12:44 AM - Re: Cabin noise (von Allmen Guido)
2. 04:22 AM - Re: Cabin noise (William Bernard)
3. 07:57 AM - Re: Cabin noise (Richard Lamb)
4. 09:05 PM - Re: Cabin noise (red)
Message 1
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--> Tailwind-List message posted by: von Allmen Guido <lapulce@freesurf.ch>
This item will be one of our future problems since here in Switzerland we
have very strict rules about noise in GA. For us the problem won't be the
cabin noise but the noise measured outside. The first thing we will try is
certainly the swiss muffler described by Bingelis. But we are not yet there.
Guido
> From: "William Bernard" <billbernard@worldnet.att.net>
> Reply-To: tailwind-list@matronics.com
> Date: Sat, 8 May 2004 06:22:11 -0500
> To: <tailwind-list@matronics.com>
> Subject: Re: Tailwind-List: Cabin noise
>
> --> Tailwind-List message posted by: "William Bernard"
> <billbernard@worldnet.att.net>
>
> In the 'for whatit's worth' category, several years ago at OSH, I stopped by
> a booth selling high tech sound deadening material. When I told the guy that
> the Tailwind was fabric covered, his response was "don't bother" with sound
> deadening.
>
> Only slightly off this thread, I wonder what our European members are doing
> about noise, especially from the exhaust?
>
> Bill
> ----- Original Message -----
> From: "Rich Ellis" <rjrellis@yahoo.com>
> To: <tailwind-list@matronics.com>
> Sent: Friday, May 07, 2004 7:47 AM
> Subject: Re: Tailwind-List: Cabin noise
>
>
>> --> 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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--> Tailwind-List message posted by: "William Bernard" <billbernard@worldnet.att.net>
We don't particualrly have noise regulations that apply to us -yet- but
exhaust noise is still a concern. The classic case is folks moving near an
airport and then complaining about the noise! The fact that the airport was
there first is generally irrelevant to the defense.
Please keep us posted as to your progress in this area.
Bill
----- Original Message -----
From: "von Allmen Guido" <lapulce@freesurf.ch>
Subject: Re: Tailwind-List: Cabin noise
> --> Tailwind-List message posted by: von Allmen Guido
<lapulce@freesurf.ch>
>
> This item will be one of our future problems since here in Switzerland we
> have very strict rules about noise in GA. For us the problem won't be the
> cabin noise but the noise measured outside. The first thing we will try is
> certainly the swiss muffler described by Bingelis. But we are not yet
there.
> Guido
>
> > From: "William Bernard" <billbernard@worldnet.att.net>
> > Reply-To: tailwind-list@matronics.com
> > Date: Sat, 8 May 2004 06:22:11 -0500
> > To: <tailwind-list@matronics.com>
> > Subject: Re: Tailwind-List: Cabin noise
> >
> > --> Tailwind-List message posted by: "William Bernard"
> > <billbernard@worldnet.att.net>
> >
> > In the 'for whatit's worth' category, several years ago at OSH, I
stopped by
> > a booth selling high tech sound deadening material. When I told the guy
that
> > the Tailwind was fabric covered, his response was "don't bother" with
sound
> > deadening.
> >
> > Only slightly off this thread, I wonder what our European members are
doing
> > about noise, especially from the exhaust?
> >
> > Bill
> > ----- Original Message -----
> > From: "Rich Ellis" <rjrellis@yahoo.com>
> > To: <tailwind-list@matronics.com>
> > Sent: Friday, May 07, 2004 7:47 AM
> > Subject: Re: Tailwind-List: Cabin noise
> >
> >
> >> --> 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 3
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--> Tailwind-List message posted by: Richard Lamb <n6228l@earthlink.net>
William Bernard wrote:
>
> --> Tailwind-List message posted by: "William Bernard" <billbernard@worldnet.att.net>
>
> We don't particualrly have noise regulations that apply to us -yet- but
> exhaust noise is still a concern. The classic case is folks moving near an
> airport and then complaining about the noise! The fact that the airport was
> there first is generally irrelevant to the defense.
>
> Please keep us posted as to your progress in this area.
>
> Bill
When I bought my house on this airport, I had to sign and notarize
a paper that said there was an airport near by and my property could
be adversly effected ny Airplane Noies(tm).
Well DUH!
Richard
Message 4
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ÿÿÿÿgt; ÿÿÿÿ: "Wÿÿÿÿam Bÿÿÿÿrd" ÿÿÿÿtÿÿÿÿind-ÿÿÿÿ@matÿÿÿÿcs.cÿÿÿÿa>&gÿÿÿÿ ÿÿÿÿ; SeÿÿÿÿSatuÿÿÿÿ, Maÿÿÿÿ, 20ÿÿÿÿ:22 ÿÿÿÿ ÿÿÿÿ; Suÿÿÿÿt: RÿÿÿÿailwÿÿÿÿListÿÿÿÿbin ÿÿÿÿe
ÿÿÿÿ>ÿÿÿÿ &ÿÿÿÿ ÿÿÿÿt; &ÿÿÿÿ--&gÿÿÿÿailwÿÿÿÿListÿÿÿÿsage posted by: "William Bernard"
> <billbernard@worldnet.att.net>
> >
> > In the 'for whatit's worth' category, several years ago at OSH, I
stopped
> by
> > a booth selling high tech sound deadening material. When I told the guy
> that
> > the Tailwind was fabric covered, his response was "don't bother" with
> sound
> > deadening.
> >
> > Only slightly off this thread, I wonder what our European members are
> doing
> > about noise, especially from the exhaust?
> >
> > Bill
> > ----- Original Message -----
> > From: "Rich Ellis" <rjrellis@yahoo.com>
> > To: <tailwind-list@matronics.com>
> > Sent: Friday, May 07, 2004 7:47 AM
> > Subject: Re: Tailwind-List: Cabin noise
> >
> >
> > > --> 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
> > >
> > >
> > >
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