Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Filling cotton inside of muffler? Cox_ba12




Filling cotton inside of muffler? Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Still don't get it.
by Scotland421 Today at 8:36 am

» Engine trade --- A Cox diesel engine for an Enya .049 custom built?
by sosam117 Yesterday at 8:50 pm

» When Everybody Flew with Spark Plugs or Diesels
by Ken Cook Yesterday at 2:25 pm

» Ordered a 1/2A Skyray kit
by TLAnderson Sun Jun 20, 2021 7:52 pm

» Follow Rusty's Memorial Traveling Engines!
by NEW222 Sun Jun 20, 2021 7:33 pm

» Ron's Baby Clown and It's Bladder System from a Few Years Ago!
by Yabby Sun Jun 20, 2021 3:17 pm

» How's the weather?
by Admin Sat Jun 19, 2021 11:14 am

» C-Clip pliers and the clutch connection
by rsv1cox Sat Jun 19, 2021 10:23 am

» Lightening a piston using common tools
by davidll1984 Fri Jun 18, 2021 10:03 am

» Hobby Air Products Multi Cylinder Cox Engines
by getback Fri Jun 18, 2021 9:02 am

» music vids.. some of your favorites
by getback Thu Jun 17, 2021 1:36 pm

» Yet another Killer Bee clone by Estes?
by davidll1984 Thu Jun 17, 2021 9:58 am

Cox Engine of The Month
June-2021
balogh's

"Little Red Rooster"




PAST WINNERS
CEF Traveling Engine

Win This Engine!
Forum Store
CEF Ear Savers
Gallery


Filling cotton inside of muffler? Empty

Filling cotton inside of muffler?

Go down

Filling cotton inside of muffler? Empty Filling cotton inside of muffler?

Post  Levent Suberk Mon Jan 18, 2021 3:26 am

I think to open several holes on muffler and fill inside with cotton packing for a more effective one. Will it be quitier? Muffler is newer version: https://coxengines.ca/cox-.049-muffler.html
Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  getback Mon Jan 18, 2021 5:24 am

I think it will become wet with exhaust castor and choke the engine down / maybe loose steel wool? Happy New Year
getback
getback
Top Poster
Top Poster

2019 Supporter

2020 Supporter

Posts : 7899
Join date : 2013-01-18
Age : 63
Location : julian , NC

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Levent Suberk Mon Jan 18, 2021 6:28 am

Good idea.
Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  NEW222 Mon Jan 18, 2021 6:56 am

Very interesting topic. As well, I see both sides to the possible outcomes. Good for Mifflin, but at the same time, possibly bad for starving / choking the engine. I guess if it does hypothetically work, one may be able to replace the cotton between flights to keep it from getting overly saturated. As well, if it was me, it may be worth a shot at running it with different amounts of cotton.
NEW222
NEW222
Top Poster
Top Poster

Posts : 3282
Join date : 2011-08-13
Age : 42
Location : oakbank, mb

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  MauricioB Mon Jan 18, 2021 8:52 am

Hello Levent, I would not  No! use cotton there, because on the one hand it will saturate quickly, it can get hot and it can even ignite by the engine's flame output from the exhaust port. You are at risk of fire.
Be careful with steel wool, if the threads are fine, it is also ignited by exhaust flames.
You must use metallic material, but thick enough in diameter so that it does not catch fire or melt,
If you want to silence the cylinder, use a perforated iron plate - steel belt, as some Cox engines originally came, and that will lower the noise a lot, although you will also lose some power.
Filling cotton inside of muffler? S-l30010
MauricioB
MauricioB
Diamond Member
Diamond Member

2020 Supporter

Posts : 2883
Join date : 2016-02-16
Age : 50
Location : ARG

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Cribbs74 Mon Jan 18, 2021 11:00 am

Either of those two materials steel wool/cotton would end up being ingested by the engine.

The stock Cox muffler is pretty effective as is.


Last edited by Cribbs74 on Mon Jan 18, 2021 11:07 am; edited 1 time in total
Cribbs74
Cribbs74
Moderator

2019 Supporter

2020 Supporter

2021 Supporter

Posts : 11522
Join date : 2011-10-24
Age : 47
Location : Tuttle, OK

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  davidll1984 Mon Jan 18, 2021 11:06 am

If you want lowes noise posible try sort of silencer try m'y way Filling cotton inside of muffler? 16109810
davidll1984
davidll1984
Diamond Member
Diamond Member

Posts : 1383
Join date : 2020-02-12
Age : 36
Location : shawinigan

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Levent Suberk Mon Jan 18, 2021 11:12 am

I want to achieve a very quiet muffler. Thanks for answers.

I found flame resistant, square section cord. They are made from asbest or teflon and used for stove lids. Perhaps it works.
Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Levent Suberk Mon Jan 18, 2021 11:13 am

Hi David, I want to make it more compact, without a silencer. Thanks.
Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Levent Suberk Mon Jan 18, 2021 11:18 am

Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Lukemiester Mon Jan 18, 2021 11:24 am

Maybe fill it with some sort of fiberglass? (Insulation, tape, something like that), but as noted before, it could get sucked into the engine.... how to retain it...
Lukemiester
Lukemiester
Gold Member
Gold Member

Posts : 144
Join date : 2020-10-08
Location : Wickenburg, Arizona

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  coxaddict Mon Jan 18, 2021 2:08 pm

Hi Levent,
If you can find window screen made of aluminum you can try cutting a strip of it, roll it up to be able to fit in the muffler. The many layers would help disperse the sound waves without creating too much back pressure.
coxaddict
coxaddict
Gold Member
Gold Member

Posts : 401
Join date : 2013-01-27
Location : north shore oahu, Hawaii

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  davidll1984 Mon Jan 18, 2021 2:16 pm

Dirt bike use som sort of like that stuf we call in french laine d'amiante its pact in last parts of the tune called pipe its silencer and its Not obstructed al around the tube wit lots of hole tink if u try that Not going To work use just smaler tube od inside the exaust wit lots of smal hole and dril in the exaust couple more hole Not as mutch like the one inside and it wil work sure dont fil the gap wit that stuf very bad if the engine ingestion if y was u y try Somting difrent
davidll1984
davidll1984
Diamond Member
Diamond Member

Posts : 1383
Join date : 2020-02-12
Age : 36
Location : shawinigan

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  davidll1984 Mon Jan 18, 2021 2:20 pm

Folow coxadict Good solutions coper screen To wil have chance To work dont use coton What?
davidll1984
davidll1984
Diamond Member
Diamond Member

Posts : 1383
Join date : 2020-02-12
Age : 36
Location : shawinigan

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Levent Suberk Mon Jan 18, 2021 2:21 pm

@coxaddict wrote:Hi Levent,
If you can find window screen made of aluminum you can try cutting a strip of it, roll it up to be able to fit in the muffler.  The many layers would help disperse the sound waves without creating too much back pressure.  

Very good idea Very Happy
Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  OhBee Mon Jan 18, 2021 2:24 pm

The smaller the holes,the faster it will plug up with exhaust residue and gag the engine.  We constantly had to burn that crap out of plugged up Moped exhaust systems with a torch so they would run again!
OhBee
OhBee
Platinum Member
Platinum Member

Posts : 693
Join date : 2016-03-23
Age : 70
Location : Minnesota

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Lukemiester Mon Jan 18, 2021 2:44 pm

When i attempted my amazon rc boat with a cox, i made an underwater exhaust for it, but when i would start it outside the water, i noticed lots of noise came from the engine itself and not all from the exhaust.
Lukemiester
Lukemiester
Gold Member
Gold Member

Posts : 144
Join date : 2020-10-08
Location : Wickenburg, Arizona

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Mark Boesen Mon Jan 18, 2021 4:30 pm

@MauricioB wrote:Hello Levent, I would not  No! use cotton there, because on the one hand it will saturate quickly, it can get hot and it can even ignite by the engine's flame output from the exhaust port. You are at risk of fire.
Be careful with steel wool, if the threads are fine, it is also ignited by exhaust flames.
You must use metallic material, but thick enough in diameter so that it does not catch fire or melt,
If you want to silence the cylinder, use a perforated iron plate - steel belt, as some Cox engines originally came, and that will lower the noise a lot, although you will also lose some power.
Filling cotton inside of muffler? S-l30010
'
I'm pretty sure the cylinder in photo was an early version designed to prevent fires.

Packing course steel wool has been used by modelers for years, not a big gain and why you'd bother, but not unheard of.
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3897
Join date : 2011-09-01
Age : 62
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  roddie Mon Jan 18, 2021 8:52 pm

@getback wrote:I think it will become wet with exhaust castor and choke the engine down / maybe loose steel wool? Happy New Year

Yea! that's it! steel wool.. or fiberglass stuffed in the header-pipe(s).. "glass-packs".. Cool  ...... I'll try running some in my header-pipes.

edit; the exhaust-oil will drip-through the header; creating an acoustic-cushion (remember extrude-hone?) for the passage of the exhaust-note(s).. and drip-out of the pipe(s).. unless a sump is devised. Collecting/containing exhaust-oil wastes could help promote the further use of IC model engines at the flying-clubs.
roddie
roddie
Top Poster
Top Poster

Posts : 7192
Join date : 2013-07-17
Age : 61
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  sosam117 Mon Jan 18, 2021 10:46 pm

What about a muffler like that MauricioB has?
It an old Tatone muffler and it look like a muffler like for bigger engines?

sosam117

@MauricioB wrote:A good friend a long time ago gave me this accessory, because it must be something interesting to use, although when I do, I will put a pressure pressurizer for the fuel tank.
Filling cotton inside of muffler? 20210110
Filling cotton inside of muffler? 20210111
sosam117
sosam117
Gold Member
Gold Member

Posts : 439
Join date : 2016-03-23
Location : Suburb of Chicago, Illinois

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Oldenginerod Tue Jan 19, 2021 3:01 pm

I've used this stuff in small stationary engine mufflers before. Just a common pot scourer.
Filling cotton inside of muffler? Stainl10
Oldenginerod
Oldenginerod
Top Poster
Top Poster

Posts : 3361
Join date : 2012-06-15
Age : 58
Location : Drouin, Victoria

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Levent Suberk Tue Jan 19, 2021 4:27 pm

It is best to try a rolled strip of fine screen mesh inside of muffler as coxaddict suggested.

Filling cotton inside of muffler? Format10
Levent Suberk
Levent Suberk
Diamond Member
Diamond Member

Posts : 1229
Join date : 2017-12-24
Location : Turkey

Back to top Go down

Filling cotton inside of muffler? Empty Re: Filling cotton inside of muffler?

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum