160 DZ noise

[Koenig, Tom]

Gents,

Just shooting for prop combinations.

On the weekend we were doing some ( disturbing) noise tests. We are also about to run our annual comp and team trials for CAOCC and our Bi-annual Trans Tasman punch up with the new Zealander's, where we will be noise testing. so I thought I'd better be prepared.

Anyway- my 160 DZ, Hattori 698, CD header on 29 % Nitro Coolpower 'blue' oil, Hyde style soft mount, APC 16.5 x 12 W and Synergy airframe produced 99 DB at 3 meters @ 8600 rpm!!!!!!!!

This thing is making a RACKETT!!!!!

Next day I went down to 25% Nitro and 15.5 x 12.5 W and reduced this to 95 DB.

Now I am not running that different a set-up to most people, but it confirms my suspicion that most of those that I compete against are WAY over the noise limit.

Since I have heaps of power I am about to try a 20% nitro mix and see if I can get the thing to shut some more. I am also considering trying a 15.5 four blade.

Those of you who HAVE noise tested your set ups.....what are you using successfully???

Thanks for any recommendations.

Tom

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