Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-28-2009, 08:06 AM   #1
4 Rivet Member
 
Airstream01's Avatar
 
2008 25' Safari FB SE
Land of fruits and nuts , California
Join Date: Jul 2009
Posts: 291
Quieting a noisy generator

I did a quick search but didn't find anything here, but did find a few sites on the internet. I bought a pre-owned 3500W Craftsman generator off craigslist for $225. It is loud. And heavy. The heavy part I can deal with 'cause I'm young The loud part annoys me, so based on what I've read elswhere on the internet, I'm going to quiet it. Here's the plan: yesterday I went to AutoZone and bought the cheapest car muffler I could find ($19.99) and some of the flexible exhaust pipe and two couplers. I will weld one coupler directly to the existing muffler on the generator. Once that is done everything else will just slide on. I will take photos and such of my progress and post them here. Once complete I will make a short video of a before and after to give everyone an idea of the sound reduction. I don't have a decible meter but I may invest in one to make this scientific and all Stay tuned.
__________________

__________________
Airstream01 is offline   Reply With Quote
Old 08-28-2009, 08:39 AM   #2
Rivet Master
 
SilverRanger's Avatar
 
2005 19' Safari
1968 24' Tradewind
Rural , Delaware
Join Date: Jun 2005
Posts: 1,475
Check this out, especially the second half:

Quieten That Generator
__________________

__________________
2005 Bambi
1968 Trade Wind
2007 Ford F250 4x4 Crew
WDCU
SilverRanger is offline   Reply With Quote
Old 08-28-2009, 08:44 AM   #3
3 Rivet Member
 
snake's Avatar
 
1994 21' Sovereign
Tucson , Arizona
Join Date: Mar 2006
Posts: 174
Unfortunately exhaust isn't the only source of noise from an unenclosed generator. If you can afford a late model Airstream, you can afford a decent Honda or Yamaha generator. Do yourself and your neighbors a favor.
__________________
snake is offline   Reply With Quote
Old 08-28-2009, 08:59 AM   #4
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Any kind of baffle or portable wall will reduce sound for you somewhat. Unfortunately the sound has to go somewhere else.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 08-28-2009, 09:01 AM   #5
2 Rivet Member
 
Clyde-2's Avatar
 
1972 27' Overlander
Bonita , Texas
Join Date: Aug 2009
Posts: 68
Blog Entries: 15
Sounds like you have a contractor grade generator instead of an RV generator. I haven't bought one yet myself but have researched enough to know that you have to shell out some $$$ (new)to get a good quiet one.
__________________
Link to my restoration blog:

http://www.airforums.com/forums/blog...7-clyde-2.html
Clyde-2 is offline   Reply With Quote
Old 08-28-2009, 09:37 AM   #6
4 Rivet Member
 
Airstream01's Avatar
 
2008 25' Safari FB SE
Land of fruits and nuts , California
Join Date: Jul 2009
Posts: 291
Quote:
Originally Posted by snake View Post
Unfortunately exhaust isn't the only source of noise from an unenclosed generator. If you can afford a late model Airstream, you can afford a decent Honda or Yamaha generator. Do yourself and your neighbors a favor.
I know, but it is a significant source of the noise.

Quote:
Originally Posted by Clyde-2 View Post
Sounds like you have a contractor grade generator instead of an RV generator. I haven't bought one yet myself but have researched enough to know that you have to shell out some $$$ (new)to get a good quiet one.
Yes, about $2k. Not gonna happen.
__________________
Airstream01 is offline   Reply With Quote
Old 08-28-2009, 09:43 AM   #7
Rivet Master
 
Airstream25's Avatar
 
1995 25' Excella
1961 26' Overlander
1982 34' Limited
Albuquerque , New Mexico
Join Date: Dec 2005
Posts: 737
Images: 21
Send a message via Skype™ to Airstream25
Getting back to the original point of this thread;

Seems like the 2 things that could be helpful are the muffler that you are already making and some sort of enclosure. The problems with that are getting the exhaust out and getting enough air in for combustion and for cooling. Since heat rises, this suggests that the top of the enclosure should be open.

This suggestion is probably overkill, but a 4 sided enclosure taller than a standing person would likely do a good job of directing most of the noise straight up and away from people. The material could be rigid foam sheets of 1 1/2 or 2" building insulation. If the panels were hinged together then they could be folded up for transportation or opened for adding fuel.
Cut a port near the bottom and install a cooling fan to blow on the engine. Plug the fan into the generator.

Like I said, suggestion is probably overkill but it should do a really good quieting job.
__________________
Airstream25
KE5CKG on 2 meters
AIR #10274
Airstream25 is offline   Reply With Quote
Old 08-28-2009, 09:55 AM   #8
Past Prez.NEU/Membership
 
AirHog's Avatar
 
2005 34' Classic
2015 Interstate Ext. Coach
N Smithfield , Rhode Island
Join Date: Feb 2004
Posts: 846
Images: 21
The Honda E2000 purrs like a kitten....... and we paid in the high $800's for ours. We ordered ours on line.

Gail
__________________
T & Gail
2015 Airstream Interstate Ext
2005 34'Classic- Mercury (Goddess of Travel)
2004 Yukon Denali
, 2016 GMC 2500 Denali-Duramax Diesel
WBCCI #2905-NEU

AirHog is offline   Reply With Quote
Old 08-28-2009, 10:05 AM   #9
4 Rivet Member
 
Airstream01's Avatar
 
2008 25' Safari FB SE
Land of fruits and nuts , California
Join Date: Jul 2009
Posts: 291
Quote:
Originally Posted by Airstream25 View Post
Getting back to the original point of this thread;

Seems like the 2 things that could be helpful are the muffler that you are already making and some sort of enclosure. The problems with that are getting the exhaust out and getting enough air in for combustion and for cooling. Since heat rises, this suggests that the top of the enclosure should be open.

This suggestion is probably overkill, but a 4 sided enclosure taller than a standing person would likely do a good job of directing most of the noise straight up and away from people. The material could be rigid foam sheets of 1 1/2 or 2" building insulation. If the panels were hinged together then they could be folded up for transportation or opened for adding fuel.
Cut a port near the bottom and install a cooling fan to blow on the engine. Plug the fan into the generator.

Like I said, suggestion is probably overkill but it should do a really good quieting job.
The top of my generator is the fuel tank.I may enclose 2 sides with 3/4" plywood, but I'm going to see how well the muffler quiets it first.

Quote:
Originally Posted by Titu & Gail View Post
The Honda E2000 purrs like a kitten....... and we paid in the high $800's for ours. We ordered ours on line.

Gail
Gail, unfortunately, that generator will not run my 13,500 A/C unit. Two of them in parallel would, but then I'm carrying two (expensive) generators. If I can do the job with one (heavy as it may be) generator that is reasonably quiet, that is the route I prefer.
__________________
Airstream01 is offline   Reply With Quote
Old 08-28-2009, 10:56 AM   #10
Rivet Master
 
SilverRanger's Avatar
 
2005 19' Safari
1968 24' Tradewind
Rural , Delaware
Join Date: Jun 2005
Posts: 1,475
generator soundproof box
__________________
2005 Bambi
1968 Trade Wind
2007 Ford F250 4x4 Crew
WDCU
SilverRanger is offline   Reply With Quote
Old 08-28-2009, 11:28 AM   #11
banjobill
 
wmarsha's Avatar
 
2000 30' Limited
battle ground, , Washington
Join Date: Jun 2009
Posts: 510
if you look at a commercial tin can (acoustic enclosure) for a large standby genset, you will find the interior is perforated metal with a sound absorbing material underneath-the thicker the pleats or openings in the sound absorbing mat'l the better. The exhaust, of course, is muffled-on a small B&S engine there is a lot of noise coming from the valve train. so, you need to enclose the unit-but ya gotta move some air around the dang thing to cool it. any exposed exhaust pipe between the engine and the muffler will also have a sound resonating from it-so close couple the muffler, and insulate around the pipe. good luck.
__________________
wmarsha is offline   Reply With Quote
Old 08-28-2009, 09:25 PM   #12
Rivet Master
 
TBRich's Avatar

 
2006 19' Safari SE
Tucson , Arizona
Join Date: Jun 2007
Posts: 4,483
Images: 64
After struggling with this issue of a good and quiet generator...you know, weight vs cost vs power vs loudness...we finally bit the bullet and got a Honda EU2000i Companion after much research and balancing the factors... Boy are we glad we did. We just got back from camping 12 days all dry camping in NF campgrounds and it performed beautifully and is easy to use...and light enough as to not get a a hernia trying to wrangle it around. There were other generators in the campground and we were amazed at how loud some of them were...one fella's near our camp site had one that sounded like a dang chain saw or lawn mower...I almost went over and asked him to turn it off ... just so we could hear ours purring nearby! The Hondas really are the ticket. We figured if we REALLY find we need to have AC we'll do the parallel thing down the pike...

Another thing to consider in using industrial strength genreators is the quality of electricty you get...the Hondas (and equivalent Yamahas) give you clean sine wave power that will not hurt your electronics.
__________________
TB & Greg and Abbey Schnauzer
AirForums #21900 . Membership Chair, 4C
Unit #3954
Travel Log: AZBambi...On the Road Again
TBRich is offline   Reply With Quote
Old 08-28-2009, 11:22 PM   #13
Rivet Master
 
ROBERTSUNRUS's Avatar

 
2005 25' Safari
Salem , Oregon
Join Date: Mar 2006
Posts: 7,266
Images: 18
Blog Entries: 51
Hi, the two easiest ways to make a noisey generator quiet are: A 500 foot power cord, or a 10 lb. sledge hammer smack dab in the middle of it.

One generator that won't break the bank, or your back, and run your A/C is the Yamaha 2400. I know to you it's a challenge, but most of us have already gone down that road [including me] and in the end you just have to spend the bucks and realize that the quiet generators are more than just fancy mufflers.
Attached Thumbnails
Click image for larger version

Name:	IMG_0460 (Large).JPG
Views:	265
Size:	103.6 KB
ID:	86302  
__________________
Bob

2005 Safari 25-B
"Le Petit Chateau Argent"
[ Small Silver Castle ]
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
ROBERTSUNRUS is offline   Reply With Quote
Old 08-29-2009, 08:23 AM   #14
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
The 1st generator I bought was a 4500 watt Champion (chinese) generator on sale for about $300. Noisy but not as much as some, but still obnoxious. I used it a total of about 6 times and also was trying to figure how to quiet it. I then found a good deal on a used Honda 2000 inverter and never used the Champion again although I held on to it for a while in case I needed to power my AC (never did). I would rather be a little hot than have to listen to that noisy generator so I sold it this summer in a garage sale for $100. I find I only use my Honda once or twice a season. I put in more battery power and can easily get through a long weekend without it. My one compromise with technology is we have a 20" flat panel combination TV/ DVD player. Next project is to put in one or 2 Fantastic fans to help with cooling when away from shore power. I also would like to paint the roof white and put on window awnings.
__________________

__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
NT 30 Motor/Fan Noisy Lumatic Furnaces, Heaters, Fireplaces & Air Conditioning 5 12-02-2008 06:31 PM
noisy radio BINDER Electrical - Systems, Generators, Batteries & Solar 18 11-15-2006 09:19 AM
Noisy Air Conditioner Larry71 Furnaces, Heaters, Fireplaces & Air Conditioning 2 07-13-2006 02:01 PM
Noisy fan wacnstac Roof Vents, Skylights & Fans 6 04-19-2006 05:47 PM
noisy water lines kooblekidz Airstream Motorhome Forums 1 08-03-2003 02:35 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:47 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.