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Speed,Combat,Scale,Racing => Carrier => Topic started by: Dennis Leonhardi on February 09, 2012, 02:18:59 PM

Title: Tongue Muffler?
Post by: Dennis Leonhardi on February 09, 2012, 02:18:59 PM

How do throttled engines behave with tongue mufflers?  Curious minds want to know ...

TIA!


Dennis
 ???

Title: Re: Tongue Muffler?
Post by: Fred Cronenwett on February 09, 2012, 02:39:20 PM

I have flown more than one CL scale model that have Tongue mufflers on the engine (with throttle) with no problems. My one and only CL carrier model has flown with a std OS muffler and the Tonque muffler, and without a muffler for carrier competition. They work just fine, the OS std mufflers do a better job with the noise.

Fred C.

Title: Re: Tongue Muffler?
Post by: Wayne J. Buran on February 09, 2012, 02:44:31 PM

I have used a tongue muffler on a carrier ship several times and the work fine. What is your concern?
Wayne

Title: Re: Tongue Muffler?
Post by: skyshark58 on February 09, 2012, 03:00:23 PM

Not very effective at reducing noise and the ones I've used tended to make the engine run a bit hot.    Mike

Title: Re: Tongue Muffler?
Post by: Dennis Leonhardi on February 09, 2012, 03:10:35 PM

Thanks guys!  You've answered my question.


Dennis
 :)

Title: Re: Tongue Muffler?
Post by: Douglas Ames on February 12, 2012, 01:17:51 PM

A neat trick is to slice the muffler "tongue" off an engine's R/C muffler and use that as an exhaust tube to direct some of the oil away from your model. Does nothing to silence but makes a neat install.

Title: Re: Tongue Muffler?
Post by: Chris Wilson on February 12, 2012, 05:53:25 PM

Quote from: ama353 on February 09, 2012, 02:18:59 PM

How do throttled engines behave with tongue mufflers?  Curious minds want to know ...

TIA!


Dennis
 ???

The increased back pressure may well aid idling but will rob some off the top end.

Title: Re: Tongue Muffler?
Post by: Paul Smith on February 13, 2012, 09:15:48 AM

Very true.  In fact, some engines need the back pressure to idle at all.  Considering the scoring emphasis on low speed, sacrificing a bit of high end in favor of reliable idling is a fair price to pay.

Of course the optimum would be to make an oldest exhaust value.  Full high speed and good low speed.

Title: Re: Tongue Muffler?
Post by: Chris Wilson on February 13, 2012, 02:14:33 PM

Quote from: Paul Smith on February 13, 2012, 09:15:48 AM

Of course the optimum would be to make an oldest exhaust value.  Full high speed and good low speed.

Is that meant to be "valve?"

I was thinking the same thing actually, throttling is just not confined to the intake with an adjustable exhaust valve.

Its just that I really hate tongue 'mufflers' ........... I mean diffusers.