15% power gain with resonator   
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Giant Scale Cars >> 15% power gain with resonator Page: [1]

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15% power gain with resonator - 10/23/2009 2:32 PM   
OLD_SLOW and in the WAY



Posts: 1424
Score: 100
Joined: 8/22/2002
Last Login: 12/1/2009
From: , OR, USA
Status: offline 		the units i tested have a 355ml volume ( as reference it the same volume as a 12oz pop can) with a 3/8" diameter intake horn by 1" long, the horn can be anywhere on the resonator. basically it uses the spitback to help charge the resonator box and the inertia of the incoming air through the smaller opening overcomes the spitback which supercharges the next intake cycle. the engine comes on like a nitrous shot. the shape of the resonator isnt critical as long as you have 1" between the carb opening and the resonator wall, you will have to have the intake runner lenght set at 3 13/16" from piston face to carb opening. the resonator will give you some insurance in a dunking by keeping from gettin hydro'd.
nevermind the aluminum chips it was in the construction stage



here are the only pice i have left of the "ratflask" hemmholz resonator.
the container was made by rubbermaid and had a very tight seal with the lid.

[URL=http://img11.imageshack.us/i/0999999.jpg/] [/URL]



this is the velocity stack used inside the flask

[URL=http://img260.imageshack.us/i/mutantengtyp017.jpg/] [/URL]


inlet horn and grommet

[URL=http://img18.imageshack.us/i/obstuff126.jpg/] [/URL]


interior of flask

[URL=http://img260.imageshack.us/i/obstuff127.jpg/] [/URL]


profile of intake stack, the 5 to 8% refernces the gain over a straight carb opening

[URL=http://img260.imageshack.us/i/vstacks1.jpg/] [/URL]






i am no longer in the biz so youz guyz are on your own if you want one

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RE: 15% power gain with resonator - 10/23/2009 2:37 PM   
dc2 man



Posts: 2087
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Joined: 2/8/2009
Last Login: 3/22/2010
From: limerick, IRELAND
Status: offline 		thanks for sharing that.

mmm intresting...i would like to learn more about this.
from looking at pics i still cant understand where it goes how it works?

could you explain please where it is mounted?
thanks
dc2


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