Author Topic: Aermacchi 350 Noise testing rpm  (Read 644 times)

Andy Guy

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Aermacchi 350 Noise testing rpm
« on: October 14, 2020, 02:52:46 PM »
Can anyone remember off the top of their head the rpm an 80mm stroke single has to be revved  for noise testing?

Thankyou
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Spen

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Ken Perch

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Re: Aermacchi 350 Noise testing rpm
« Reply #2 on: October 14, 2020, 05:01:29 PM »
On p62 of the 2020 ACU Handbook it states that for fourstroke machines the measurement is calculated on a mean piston speed of 11m/sec.
There is an accompanying table and with a stroke of 80mm this equates to 4125rpm.

Andy Guy

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Re: Aermacchi 350 Noise testing rpm
« Reply #3 on: October 14, 2020, 09:23:11 PM »
Smashing. Thanks chaps
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