 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
larry(at)macsmachine.com
Guest
|
 Posted: Sun Nov 04, 2007 1:22 pm Post subject: 601 sound attenuation |
 |
|
Hi Guys,
The last several days, I've been adding foam soundproofing to complete
the firewall, sides, floor etc. I'm not done, but could wait no longer.
I drove to the hangar, pulled the plane onto the apron and started it. I
wanted to check the effect of soundproofing, so I left my headset off
first. The sound was a lower, more muffled frequency. With the double-D
type rubber canopy seals in place, there were no drafts at my elbows,
despite a wind with 25-mph gusts. Canopy latch operation was not
affected by the slight compression of the seals either. With the
headset on, sound seemed more noticeable behind, as soundproofing was
not yet added to the baggage turtle deck. I taxied about and was really
satisfied with smooth low tone of the Subaru engine from 1100 to 3000
rpm. I put the plane back in the hangar with satisfaction and resolved
to do the baggage turtle-deck and the forward top skin next. It looks
like the penalty for soundproofing all around will be about 5 pounds.
I'll post again when it's "done", but thought you'd like to know it does
make a difference.
Larry McFarland 601HDS at www.macsmachine.com
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
| Back to top |
|
 |
purplemoon99(at)bellsouth
Guest
|
| Posted: Sun Nov 04, 2007 2:33 pm Post subject: 601 sound attenuation |
|
|
Larry, what type of foam are you using.? is it a sheet type . What is the
double D type rubber seal?
Joe N101HD 601XL/RAM
---
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
| Back to top |
|
|
larry(at)macsmachine.com
Guest
|
| Posted: Sun Nov 04, 2007 3:19 pm Post subject: 601 sound attenuation |
|
|
Hi Joe, The foam is from Aircraft Spruce, 1/2-inch. I'd used 3/8"
between the firewall and the header tank, but used 1/2-inch all round on
the forward side of the
firewall, under the carpeted floor and sides. The D-type soft rubber
seals were from the trim strip area of Lowe's. It actually comes in a
coil advertised at 17-feet, but is double width for a perfect 3/4-inch
wide double-D, 1/4-inch high section. Very soft, 10-year service
guarantee. The foam is a 3M formula 77 spray adhesive. You press the
material lightly inside and the flanges mark the foam so you can cut the
piece. The best cutter is one that the blade slides out of the handle
and is segmented so you can break off pieces of it as it dulls. Cuts
best when it's against a metal yardstick on the foam.
Larry
Southern Reflections wrote:
[quote]
<purplemoon99(at)bellsouth.net>
Larry, what type of foam are you using.? is it a sheet type . What
is the double D type rubber seal? Joe N101HD 601XL/RAM
---
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
