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03-30-2010 05:59 PM  10 years ago
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paulferr8203

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canton, ct. usa

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Muffler Needed
I was working on my Helicopter the other day when I noticed that one side of my muffler was stripped and would not allow me to thread the screw in. I need a muffler that will fit my o.s. 28F-H engine. Does anyone have one for sale or know where I could find one?
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03-30-2010 06:11 PM  10 years ago
Brokenlink

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Oakdale

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Try the classified forum.Jamie Griffith
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03-30-2010 06:13 PM  10 years ago
trekrider586

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Sylacauga,Al

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can't you just use a longer bolt and a nut??it's better to ask for forgiveness than for permission
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03-30-2010 06:19 PM  10 years ago
paulferr8203

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canton, ct. usa

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The problem is that the muffler itself is what is threaded so there are no bolts. Just the screw that screws into the muffler which is stripped.
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03-30-2010 06:46 PM  10 years ago
z11355

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New England

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might want to consider threaded inserts to rebuild the threads in steel, not aluminum.

like this......

http://www.mcmaster.com/#threaded-inserts/=6g0vbh
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03-30-2010 07:00 PM  10 years ago
QuantumPSI

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Atlanta, GA

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Is there anything stopping you from using a longer screw and putting a nut on the back like trek said? Maybe I missed something?! ...now where was I, dh/dt = BS-dx/dt
I will fly you forever... till earth do us part
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03-30-2010 07:15 PM  10 years ago
trekrider586

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Sylacauga,Al

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what muffler you using?

most of them bolt thru the engine first then thru the muffler.and then if you strip out the threads in the muffler you can use a longer bolt,then put a nut on the back.unless the threads are inside the header with nothing showing on the outside.
it's better to ask for forgiveness than for permission
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03-30-2010 08:08 PM  10 years ago
rotormonkey

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Ottawa, ON - Canada

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unless the threads are inside the header with nothing showing on the outside.
Even then, if it's already stripped out, just drill it through, and use a longer bolt w/ a nut anyway.

the only limitation I can see is if for some reason there isn't enough room to get that nut in there.
If it can't hover, it ain't worth flying.
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03-31-2010 12:35 AM  10 years ago
junkpilot

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Alamogordo N.M.

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Muffler
Hi Paul;
So what kind of bird are you flying? Maybe tell us a little about your bird and yourself. I notice you're flying or trying to fly with an old 28,Is it a case of thats all we got or just a preference?
Some thing tells me to help you so get your story in order and PM me.
I'm sure I have a more modern enging if that will help.(no charge) And I know I have a muffler you can have.
Junkpilot
When you fly JUNK it's hard to tell when you've crashed!
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03-31-2010 12:40 AM  10 years ago
Yug

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UK. Herts

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Drill out the threads and use a couple of long bolts with aerotight nuts.Vegetable rights and Peace
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03-31-2010 12:45 AM  10 years ago
z11355

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New England

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Yug,

those all metal locknut Aerotight 'stiff nuts' aren't available in the US (or I've never seen them). I got 100 of them many years ago and treat them like gold
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03-31-2010 12:52 AM  10 years ago
Yug

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UK. Herts

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So for anyone that is interested, these aerotight nuts can be purchased from http://www.modelfixings.co.ukVegetable rights and Peace
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03-31-2010 09:21 PM  10 years ago
paulferr8203

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canton, ct. usa

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Thank you all for your replies. The problem was that the bolts thread into the header with nothing showing. I cut the extra material off and drilled though but in the process i ended up puting a hole in the muffler because i slipped with the drill... now i deffinitely need a new one... thanks for the help though the information was definitaly useful
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04-01-2010 03:20 PM  10 years ago
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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show us some pics of what you have(or give more details), we are all willing to help. i have a nmuffler i can donate but need to make sure it will help ya out.
what machine are you flying?
drive a rotary, fly a rotorcraft
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04-11-2010 01:29 AM  10 years ago
TONYVAL

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Keyport, NJ - USA

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can you use the 3rd muffler I have listed?

Its a weston muffler, they work great on 30 size motors

its not threaded, you would use longer bolts with nuts

https://rc.runryder.com/t581201p1/
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04-11-2010 01:51 AM  10 years ago
Mighty Mouse

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Deep South

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Just put a scew in the hole that you drilled into the muffler....:0)Here I come to save the day !!!
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04-12-2010 02:44 PM  10 years ago
heliman45

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dayton ohio usa

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fix
all you need to do is get a longer screw and run it all the way trough and put a lock nut on the backside and tighten it down.
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