RunRyder RC Helicopter Topic - Quiet gasser

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Gasser Model RC Helicopters > Quiet gasser

cmartin
Veteran
Location: Kouts IN

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Ive got the stock muffler on my gasser and I really want to quiet it down, like really quiet. You guys have any to suggest??

Chad

07-14-2003 Over year old.

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Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

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Chad, look at what is being used on the higher performance GoPeds, and you will see the challenge heli muffler designers face. The least offensive muffler is probably the MA Tuned muffler/header combo.

07-14-2003 Over year old.

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smosher
Senior Heliman
Location: canada

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The new Bergen gas muffler works great. It's easily as quiet as the one I have on my MA Gas, a whole lot quieter than the stock muffler on a Z230 and seems to work better in the midrange.

Have a Z230 set up to hover at 1600 RPM. Took that muffler off, put the Bergen on and tacked at 1800 RPM.

07-14-2003 Over year old.

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cmartin
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Location: Kouts IN

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Bergen muffler

I was thinking about the bergen muffler, but one of my buddies is having a problem with the mounting of the muffler, the mounting studs and bolts keep coming loose, I know I dont want another problem. Any other?

Thanks

07-15-2003 Over year old.

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smosher
Senior Heliman
Location: canada

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My Bergen has stayed tight since I installed it (+20 flights). I put Locktite on the studs and used the lock washers - worked fine (vrs, the Bisson which came loose every flight).

Maybe a Bergen rep could jump in here and comment.

07-15-2003 Over year old.

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Malorie
Elite Veteran
Location: Paw squared, MI

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Use high temp LocTite on the studs and nuts and a light coating of high temp gasket sealer on the mating surfaces.

I have 5-6 gallons through mine since the last rebuild with no signs of coming loose.

The muffler coming loose can be a sign of unresolved vibration issues.

I have run both the Bergen and the MA mufflers. They are about the same db level. The Bergen has a smoother sound and produces more power. The MA sounds a bit brassier and doesn't produce the same power.

Life's a journey, NOT a destination.

07-15-2003 Over year old.

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Dr.Tim
Key Veteran
Location: Mojave Desert

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A Little High Temp Locktite will do the trick ..... I can honestly say that I have NEVER had a Gasser Muffler or tuned pipe come loose! .......... I have seen Tree limbs and other debri fall from my helo but, never a tunes pipe

Dr.Tim

From Simple minds come simple ideas! Starwood Models, Approach Engineering .

07-15-2003 Over year old.

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cmartin
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Location: Kouts IN

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I will tell my friend, and When I save up the $$ probably go for the Bergen then.

07-16-2003 Over year old.

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cmartin
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Location: Kouts IN

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intake silencer ??

Tell me more, Im all ears

07-16-2003 Over year old.

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Gasser Model RC Helicopters > Quiet gasser

ImRich
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Location: Derry, NH USA

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Here's an idea if you want a very quiet exhaust. Try to add a secondary muffler. Start with the MinAir 4030 (or the Bergen, are these the same unit? I'm not sure). Then use some hi-temp silicone tubing and link the output of the 4030 to another muffler for additional quieting.

Be sure that the secondary muffler does add undue back pressure.

No, I haven't tried this, I'm just thinking with my fingers. I could imagine a second muffler below the first one, there is room for it!

As to an intake silencer, the carburator (and intake) actually contribute to a lot of noise. You need some sort of silencer for that also, but one that does not restrict airflow. A tough challenge!

Also, remember you are adding weight with each modification.

---
Rich

07-17-2003 Over year old.

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Gasser Model RC Helicopters > Quiet gasser

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