BME-102 DB readings need to be under 98 DB at 9 feet is it possible without using tuned cans? I would like to stay away from 3 bladed props if possible however am open to suggestions. Please help.

Thanks
Mike

Mike, no problem getting under 98dB on the stock mufflers with a BME 102. A MenzS 26-10 2 blade will be right on the edge with a broken in motor turning 6700 rpm static. My IMAC prop of choice for my 102 is the MSC 26-10 which turns 6100-6200 rpm while producing 39 pounds of thrust according to my Digital fish scale .....er.........THRUST GAUGE. That's only a pound or two less than the MenzS produced, but is a BUNCH quieter (less rpm). Noise level was less than 96 dB over hard surface! Downline braking is a LOT better also, since the MSC blades are a lot wider than the Menz blades.

Tim,

Did you see the distance, 9 ft. Not IMAC's 25 ft. I don't think it can be done without a 3 blade. It might take canisters and a 3 blade. But I haven't done any tests at 9 ft. so not really sure.

Tracy Hill

OOOPS. Yepper, 9 feet would make a BIG difference. On the other hand, if it's 9 feet over grass rather than over a hard surface, that's gives another 2 dB to work with. I wonder what my plane's 94dB over grass reading would be at 9 feet? I get some weather, and I'll take a reading to find out.

Tim

Tim
Thanks for the info. I need to know what props you are using MSC? will need readings over grass that should be some help. if you get readings please let me know.

Thanks
Mike

Did sound tests at our club on Sunday. My BME 102 with a 27x10 Mejzlik was 102db at 9 ft; 94db at 25 ft. Hard surface.

Craig.

My G-62 has been measured to 94dB at 9ft.
The engine is equipped with a Toni-Clark 3-chamber silencer and swinging an APC 22x10 7400rpm.
Although this is by no means a BME 102 I´m just trying to tell you that it is possible to quiet down large gassers.

Is that an in cowl muffler?
if so do they have a web site?
Thanks
Mike

For pictures of the silencer/mount go to: http://www.nuserne.dk/temporary/

Toni Clark´s website is: http://www.toni-clark.com

New J & A Mufflers
Has anyone used these mufflers and if so what reading did you get.



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