Author Topic: exhaust extension in Perky (Read 1522 times)

Ken Burdick · « **on:** November 28, 2017, 04:01:34 PM »

I may have found a way to get a reflective wave to travel back up a straight pipe. Since this is an "extension" like a mini pipe, is it legal in Perky?

C.T. Schaefer · « **Reply #1 on:** November 28, 2017, 05:04:20 PM »

I define mini pipe as a constant diameter from one end to the other. But....... I did not make the rules. TS

Dave Edwards · « **Reply #2 on:** November 28, 2017, 06:09:49 PM »

And I have some long, skinny f2d mufflers that add a few rpm, are these ok? Seems open to interpretation and maybe we should tighten up the rules to eliminate any extensions/mufflers/pipes???

Al Ferraro · « **Reply #3 on:** November 28, 2017, 08:25:19 PM »

From the AMA website.
A minipipe cannot be longer than six inches from the centerline of the engine bore to the end of pipe. The inside diameter of the pipe shall be of constant size.
Mufflers are legal in Perky.
Al

Paul Smith · « **Reply #4 on:** November 28, 2017, 09:01:25 PM »

per NASS Perky rules.

7. No Tuned Pipes or Megaphone exhaust extensions allowed. Mini
Pipes and Mufflers are ok.

Ken Burdick · « **Reply #5 on:** November 29, 2017, 08:46:14 AM »

so it's legal.

Thanks!

Russell Shaffer · « **Reply #6 on:** November 29, 2017, 04:05:08 PM »

Hey Ken. Will it work on a LA25?

Paul Smith · « **Reply #7 on:** November 29, 2017, 06:51:20 PM »

All depends on what you call "work". If it reduces noise or gets the exhaust out of the airplane, it works OK.

If it enhances power, then it's a tuned pipe and thus illegal.

Author Topic: exhaust extension in Perky (Read 1522 times)

Ken Burdick

exhaust extension in Perky

C.T. Schaefer

Re: exhaust extension in Perky

Dave Edwards

Re: exhaust extension in Perky

Al Ferraro

Re: exhaust extension in Perky

Paul Smith

Re: exhaust extension in Perky

Ken Burdick

Re: exhaust extension in Perky

Russell Shaffer

Re: exhaust extension in Perky

Paul Smith

Re: exhaust extension in Perky