am i lucky, or does this happen all the time
03-14-2009 | 03:33 PM
#1
am i lucky, or does this happen all the time
well to get to the point, one of my muffler bolts came out durng flight (yep i checked and locktited them the night before) i think my prop is out of balance and will replace it.
my engine kept running despite the muffler hanging off the engine w/ only one bolt (that was very loose). the sound changed (sounded like a 4 stroke kinda), thats how i realized it and landed.
my point is will the engine keep running w/o a muffler, or did i just get lucky? (engine gms.47)
on a different note
does anyone know where i can buy a gws 29mm motor mount (just the black mount not all the other gearbox junk) heres what i need but w/o all the gearbox stuff (http://www3.towerhobbies.com/cgi-bin...&I=LXHUV7&P=SM)
my engine kept running despite the muffler hanging off the engine w/ only one bolt (that was very loose). the sound changed (sounded like a 4 stroke kinda), thats how i realized it and landed.
my point is will the engine keep running w/o a muffler, or did i just get lucky? (engine gms.47)
on a different note
does anyone know where i can buy a gws 29mm motor mount (just the black mount not all the other gearbox junk) heres what i need but w/o all the gearbox stuff (http://www3.towerhobbies.com/cgi-bin...&I=LXHUV7&P=SM)
03-14-2009 | 04:04 PM
#3
My Feedback: (1)
RE: am i lucky, or does this happen all the time
Normally, you will lose the pressure to the tank. It may run for a while, but it will quit. The safest thing to do is land it and fix it. You don't want to dead-stick upwind somewhere with no place to land.
CGr
CGr
03-14-2009 | 06:48 PM
#5
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From: edinburg, VA
RE: am i lucky, or does this happen all the time
If you think the prop is out of balance not trash it. Balance it. You should balance all your props before you fly them. You can get get simple finger balancers or a stand alone balancer for a little more
03-14-2009 | 07:51 PM
#6
RE: am i lucky, or does this happen all the time
ORIGINAL: CGRetired
Normally, you will lose the pressure to the tank. It may run for a while, but it will quit. The safest thing to do is land it and fix it. You don't want to dead-stick upwind somewhere with no place to land.
CGr
Normally, you will lose the pressure to the tank. It may run for a while, but it will quit. The safest thing to do is land it and fix it. You don't want to dead-stick upwind somewhere with no place to land.
CGr
i wont trash the prop btw i just need to balance it as said.
03-15-2009 | 06:18 AM
#7
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From: Jacksonville, FL
RE: am i lucky, or does this happen all the time
Hey Leavenworth Ks...I grew up not far from you....St. Joseph, Mo....been to Leavenworth many many times.....You Army?
Anyway locktite the night before might not do you much good...check your locktite instructions some say 24 hrs drying time.....and the heat will break it down
try a spilt style lockwasher.....I have an OS 1.60 with a Pitts style muffler no matter what I did that muffler would eventually lossen.... until I drilled a hole in the head of the screws and safety wired the bolts....
If you don't know what I mean by safety wire...look it up on the net or go to an airport and ask a mechanic to show you...thats easier than trying to explain it...basically safety wire you run a wire through the bolt heads to prevent the bolts from lossening
Good Luck
Anyway locktite the night before might not do you much good...check your locktite instructions some say 24 hrs drying time.....and the heat will break it down
try a spilt style lockwasher.....I have an OS 1.60 with a Pitts style muffler no matter what I did that muffler would eventually lossen.... until I drilled a hole in the head of the screws and safety wired the bolts....
If you don't know what I mean by safety wire...look it up on the net or go to an airport and ask a mechanic to show you...thats easier than trying to explain it...basically safety wire you run a wire through the bolt heads to prevent the bolts from lossening
Good Luck
03-15-2009 | 07:25 AM
#8
Senior Member
RE: am i lucky, or does this happen all the time
Most engines will run fine without mufflers. It wasn't to many years ago when few if any of the model engines had mufflers. When noise levels started to be a problem in keeping flying fields (about the mid 1950's) mufflers started to become more common. Some engines then used baffles on the exhaust to help with setting up engine idle speeds.
03-15-2009 | 07:03 PM
#9
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From: Chester,
NS, CANADA
RE: am i lucky, or does this happen all the time
I have experienced mufflers coming loose a few times over the years, and from my experience, the biggest concern is not "will the engine quit", but will that loose jangling muffler cause so much radio interference that I will not be able to land the plane. Personally
I would rather the part fell completely off, than lose my plane. IMHO you did get lucky, as you recovered your plane as well as your muffler. Nice going.
Lm
I would rather the part fell completely off, than lose my plane. IMHO you did get lucky, as you recovered your plane as well as your muffler. Nice going.
Lm
03-15-2009 | 09:34 PM
#10
RE: am i lucky, or does this happen all the time
ORIGINAL: lordmerren
I have experienced mufflers coming loose a few times over the years, and from my experience, the biggest concern is not "will the engine quit", but will that loose jangling muffler cause so much radio interference that I will not be able to land the plane. Personally
I would rather the part fell completely off, than lose my plane. IMHO you did get lucky, as you recovered your plane as well as your muffler. Nice going.
Lm
I have experienced mufflers coming loose a few times over the years, and from my experience, the biggest concern is not "will the engine quit", but will that loose jangling muffler cause so much radio interference that I will not be able to land the plane. Personally
I would rather the part fell completely off, than lose my plane. IMHO you did get lucky, as you recovered your plane as well as your muffler. Nice going.
Lm
engine was being weird all day (4 hours), it wouldnt idle which it usually does very well (i can never get it to stop), until near the end of the day i noticed that the screw that keeps the carb together (that little one on the top) was very loose. once i screwed that down all was good again.
and i flew my gp rapture at the end of the day, that plane is so smooth (compared to my spad), although the roll rate isnt as high as i would like, its still fun to fly, a great "sunday flyer"
03-15-2009 | 10:58 PM
#11
RE: am i lucky, or does this happen all the time
jj 213, here is a little tip that very few will listen to. It is very simple but doesn't do justice to the I-pod and $200 sneaker crowd, but it saves mufflers. I have planted a number of mufflers way back when we first started using them. I have never seen where any sprouted and grew a muffler bush, tree, whatever. I don't care to plant them.
1. Using regular sissors, you can cut some aluminum from a pop can. Cut it far bigger than the engine exhaust outlet.
2. Now press the alum. against the exhaust, run your fingers around it, including the screw holes. You have defined the size of the exhaust.
3. Take a sharp x-acto type knife and cut away the INSIDE of the alum. I always leave a 1/16" or more inside just for security.
4. I use the x-acto point to make my screw hole. Perfection is not needed but use a drill if you must.
5. I always tap out the muffler holes for 6-32 or bigger on BIG engines. Use black socket-head screws. They are at the home / hardware stores cheaper than a hobby shop. Your call.
6. Now you can clear off some of the outside alum. You can tidy it up after mounting your muffler.
7. That thin metal gasket will do the trick. I never use locktite or anything. I have not planted a muffler in years. I do every so often tighten the screws but they seldom take any. The soft gaskets that come with the engine are strictly POOP!
8. Each time I remove a muffler for general maintenance, I make a new gasket. I make these for backplates, for head gaskets, etc. Easy to make, perfection not required, cheap, and works great. My Kind of Thing!.
1. Using regular sissors, you can cut some aluminum from a pop can. Cut it far bigger than the engine exhaust outlet.
2. Now press the alum. against the exhaust, run your fingers around it, including the screw holes. You have defined the size of the exhaust.
3. Take a sharp x-acto type knife and cut away the INSIDE of the alum. I always leave a 1/16" or more inside just for security.
4. I use the x-acto point to make my screw hole. Perfection is not needed but use a drill if you must.
5. I always tap out the muffler holes for 6-32 or bigger on BIG engines. Use black socket-head screws. They are at the home / hardware stores cheaper than a hobby shop. Your call.
6. Now you can clear off some of the outside alum. You can tidy it up after mounting your muffler.
7. That thin metal gasket will do the trick. I never use locktite or anything. I have not planted a muffler in years. I do every so often tighten the screws but they seldom take any. The soft gaskets that come with the engine are strictly POOP!
8. Each time I remove a muffler for general maintenance, I make a new gasket. I make these for backplates, for head gaskets, etc. Easy to make, perfection not required, cheap, and works great. My Kind of Thing!.
03-16-2009 | 12:04 PM
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From: Poolesville, MD
RE: am i lucky, or does this happen all the time
ORIGINAL: jimmyjames213
my point is will the engine keep running w/o a muffler, or did i just get lucky? (engine gms.47)
my point is will the engine keep running w/o a muffler, or did i just get lucky? (engine gms.47)
When you get your replacement muffler make sure you tap a retaining screw in so it cannot come loose again.
I too have planted a few "muffler seeds" at our field...
03-16-2009 | 01:19 PM
#13
RE: am i lucky, or does this happen all the time
ORIGINAL: Hossfly
jj 213, here is a little tip that very few will listen to. It is very simple but doesn't do justice to the I-pod and $200 sneaker crowd, but it saves mufflers. I have planted a number of mufflers way back when we first started using them. I have never seen where any sprouted and grew a muffler bush, tree, whatever. I don't care to plant them.
1. Using regular sissors, you can cut some aluminum from a pop can. Cut it far bigger than the engine exhaust outlet.
2. Now press the alum. against the exhaust, run your fingers around it, including the screw holes. You have defined the size of the exhaust.
3. Take a sharp x-acto type knife and cut away the INSIDE of the alum. I always leave a 1/16" or more inside just for security.
4. I use the x-acto point to make my screw hole. Perfection is not needed but use a drill if you must.
5. I always tap out the muffler holes for 6-32 or bigger on BIG engines. Use black socket-head screws. They are at the home / hardware stores cheaper than a hobby shop. Your call.
6. Now you can clear off some of the outside alum. You can tidy it up after mounting your muffler.
7. That thin metal gasket will do the trick. I never use locktite or anything. I have not planted a muffler in years. I do every so often tighten the screws but they seldom take any. The soft gaskets that come with the engine are strictly POOP!
8. Each time I remove a muffler for general maintenance, I make a new gasket. I make these for backplates, for head gaskets, etc. Easy to make, perfection not required, cheap, and works great. My Kind of Thing!.
jj 213, here is a little tip that very few will listen to. It is very simple but doesn't do justice to the I-pod and $200 sneaker crowd, but it saves mufflers. I have planted a number of mufflers way back when we first started using them. I have never seen where any sprouted and grew a muffler bush, tree, whatever. I don't care to plant them.
1. Using regular sissors, you can cut some aluminum from a pop can. Cut it far bigger than the engine exhaust outlet.
2. Now press the alum. against the exhaust, run your fingers around it, including the screw holes. You have defined the size of the exhaust.
3. Take a sharp x-acto type knife and cut away the INSIDE of the alum. I always leave a 1/16" or more inside just for security.
4. I use the x-acto point to make my screw hole. Perfection is not needed but use a drill if you must.
5. I always tap out the muffler holes for 6-32 or bigger on BIG engines. Use black socket-head screws. They are at the home / hardware stores cheaper than a hobby shop. Your call.
6. Now you can clear off some of the outside alum. You can tidy it up after mounting your muffler.
7. That thin metal gasket will do the trick. I never use locktite or anything. I have not planted a muffler in years. I do every so often tighten the screws but they seldom take any. The soft gaskets that come with the engine are strictly POOP!
8. Each time I remove a muffler for general maintenance, I make a new gasket. I make these for backplates, for head gaskets, etc. Easy to make, perfection not required, cheap, and works great. My Kind of Thing!.
