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You get an "A" for attention to detail and I get an "F" for dividing by 2 instead of 3 {:>). 7000/3 = 2333. 60/2333 = 0.0257 , 0.0257/6 = .00428 between pulses. Length = .00428 *1100 = 4.7 ft/2 = 2.35 ft or 28.2 " Yep, still a bit long for your needs.

----- Original Message -----

From: Russell Duffy

To: Rotary motors in aircraft

Sent: Sunday, May 08, 2005 10:20 PM

Subject: [FlyRotary] Re: 4-port intake measurements

For 7000 rpm 60/3500 = .017 sec. .017/6 = .00286 sec or 2.86 millsec. .00286 *1100 = 3.14 ft or 1/2 of that would be 1.5 ft or 18" for a runner length, at least if my math is correct. This is only an approximation but should give you an idea of lengths.

Hi Ed,

Was this a test to see if I was paying attention? Shouldn't this be 7000 rpm 60/2333= .026 sec ? Either way, these lengths seem mightly long for the cowl space I have.

Thanks for taking a look at this. I'm not sure what I'll do, but I also need to get rid of this #%&@ oil leak first. I made some progress on it, and hope I've got it beat now. Won't know how wrong I am until next time I fly.

Rusty (not kidding about the supercharger)