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10-11-2005 | 06:32 AM

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Rudeboy

Joined: Dec 2002

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From: Kortessem, BELGIUM

Prop noise sample

Here are a couple of examples of prop noise.

This is my ASP .91 on the test stand with an APC 11x7 prop.

In the video it is running at about 9200 rpm, with the muffler attached to a "noise trap" (a length of silicone feeds the exhaust into a metal fuel can)
In the sound file you can hear me removing the silicone hose from the muffler about 30 seconds into the recording.

IMO this shows that the best way to keep noise down, is to keep the rpm and the prop tip speed down...

[link=http://users.pandora.be/my_rc_world/IMAG0215.ASF]video sample[/link]
[link=http://users.pandora.be/my_rc_world/IMAG0216.WAV]sound sample[/link]

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