[NSRCA-discussion] Pipe Length for 18.1

[Dean Pappas]

Hi Mike,
So do you encounter much richening of the mixture if you stand on the throttle in prolonged level flight?
How about during just the tiniest bit of a dive at wide open throttle?
later,
Dean

Dean Pappas
Sr. Design Engineer
Kodeos Communications
111 Corporate Blvd.
South Plainfield, N.J. 07080
(908) 222-7817 phone
(908) 222-2392 fax
d.pappas at kodeos.com


-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Dr. Mike
Harrison
Sent: Wednesday, November 29, 2006 2:52 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Pipe Length for 18.1


I have got to remember to measure, I think I am closer to 26.5 inches
----- Original Message ----- 
From: "Dean Pappas" <d.pappas at kodeos.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, November 29, 2006 8:57 AM
Subject: Re: [NSRCA-discussion] Pipe Length for 18.1


>I just realized, that qoute is probably more like "Riiiiight! What's a 
>cubit?"
>
> Dean Pappas
> Sr. Design Engineer
> Kodeos Communications
> 111 Corporate Blvd.
> South Plainfield, N.J. 07080
> (908) 222-7817 phone
> (908) 222-2392 fax
> d.pappas at kodeos.com
>
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Dean
> Pappas
> Sent: Wednesday, November 29, 2006 9:55 AM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] Pipe Length for 18.1
>
>
>
> Hi Anthony,
> Yes! The pipe length specified in cubits ..." What's a cubit?" "Let's see, 
> I used to know what a cubit was."
> The stock OS header plus a Hattori 900 pipe yields 24" to the baffle. 
> (1.33 cubits)
> This is where I run my pipe length, using a Bolly 140 EQ, but I use a 
> throttle-coupled
> mixture control needle valve to fix the fuel metering for the prop I use.
> I also run rather rich with two glo-plugs and only one head gasket, which 
> already helps with the mid-range richness.
> For must of us running two head gaskets, to stop the pinging, pipe lengths 
> maybe 25" to 26"  are more appropriate.
> If I understand Mike, he runs at close to 25".
>
> later,
> Dean
>
>
> Dean Pappas
> Sr. Design Engineer
> Kodeos Communications
> 111 Corporate Blvd.
> South Plainfield, N.J. 07080
> (908) 222-7817 phone
> (908) 222-2392 fax
> d.pappas at kodeos.com
>
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Anthony
> Romano
> Sent: Wednesday, November 29, 2006 9:16 AM
> To: nsrca-discussion at lists.nsrca.org
> Subject: [NSRCA-discussion] Pipe Length for 18.1
>
>
>
> Interesting comments will have to give on of these a try. I like to have
> more speed available so the  18.1 X 10.1  sounds more appropriate than the
> W. Am I correct on this?
> Does anyone have a pipe length glow plug to baffle since I cut my headers?
> Inches, MM, cubits, etc.
>
> Anthony
>
>>From: "Dave Smith" <davidsmith at ns.sympatico.ca>
>>Reply-To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>>To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>>Subject: Re: [NSRCA-discussion] Pipe Length
>>Date: Tue, 28 Nov 2006 18:00:17 -0400
>>
>>Thanks Mike.  I ran this prop for a few flights on the same pipe setting 
>>as
>>I used for a 16x12.5 wide APC,and 15% Cool Power. It would turn about
>>7400,but I backed off the needle so that it barely touched 7200.  It 
>>pulled
>>a 10.75 lb.
>>Brio surprisingly well but certainly not well enough on verticals.
>>My mistake in misnaming the fuel I intend to use.
>>
>>Thanks again
>>
>>Dave
>>   ----- Original Message -----
>>   From: Dr. Mike Harrison
>>   To: NSRCA Mailing List
>>   Sent: Tuesday, November 28, 2006 5:38 PM
>>   Subject: Re: [NSRCA-discussion] Pipe Length
>>
>>
>>   One more thing, the Cool Power is 20% Problend.
>>   Mike
>>     ----- Original Message -----
>>     From: Dave Smith
>>     To: NSRCA Mailing List
>>     Sent: Tuesday, November 28, 2006 2:46 PM
>>     Subject: [NSRCA-discussion] Pipe Length
>>
>>
>>     What would be a good starting point to set an ES tuned pipe,Model 2C
>>140MU on an OS 140 RX,(w/extra head shim and OS "F" plug),running on Cool
>>Power 20/20?
>>
>>     Prop is APC 18.1x10.1W.
>>
>>     Thans,Dave  NSRCA  #943
>>
>>
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