Mufflers

[john e. holliday]

On one of the posts it is mentioned that tongue mufflers are not that quiet.   To the pilot in the middle of the circle they might be a decibal or two noiser.   As old age is creeping up on me I notice that by the time I get to the handle I can barely hear my Fox .35 Stunt or even the LA .25 or .46 with tongue mufflers.   Even quieter with stock mufflers.   But, when the muffler came off the OS .35 on my Jerkline Special, what a racket.  It was a stock tube muffler.  Swiped the tongue muffler off another plane I had at the field and put a tongue muffler on.   On top of the plane while starting I could hear no difference.  But in the middle of the circle there was a slight difference.  By the way didn't check center of gravity.   What a wild flight I had.   Took it home to find a tube muffler to put back on the plane.  By the way planes do get a lot of attention when mufflers fall off or come apart, like my Fox muffler did in Wichita this year.

[Dan Berry]

I can overcome the noise with my earmuffs. I don't want to irritate guys outside the circle with an inadequate muffler.
I'm already adding 1.5oz to the tail and don't really want to put a kludge muffler and more tailweight onto it.

[Bill Little]

Hi Doc,

Not a "muffler" story, but Dan Banjock flew his jet stunter twice during the day at Huntersville.  I forgot just how loud a full size Dyna Jet actually is!

BIG Bear
RNMM/AMM

[Douglas Ames]

Hearing loss involves losing frequencies.
I can hear my cats cruching away on food 30' from my bed but sometimes can't hear someone talking next to me.

Tongue mufflers don't do much of anything I think, except generate back-pressure.

[Paul Taylor]

I will say that I can tell a big difference in sound on my LA 46's. I put the stock tube back on my Tut 2 when I go to the city park.

I was also told that you get more powe with any tube type muffler.

Think I might order a lite tube from Randy. 

[Jim Kraft]

I do not run mufflers on anything any more. My Fox 35's are not that loud and run really nice without the muffler. My McCoy Red Heads are even quieter than the Fox 35's, both the 35's and 40's. I wear ear muffs when running my Fox 59's and 60 size ignition engines. The one exception on ignition is the Ohlsson sideports as they are fairly quiet. Our R/C C/L field is out in the middle of nowhere, so we don't have a problem with neighbors. I do tend to not fly the really noisy stuff if guys are there flying R/C, but have not had any complants. It is pretty hard to hear an electric plane over an Anderson Spitfire or Orwick.