[NSRCA-discussion] Pipe Length for 18.1

[Ed Alt]

Dean:

If memory serves correctly, a cubit is the unit of measurement used by 
facilities management to figure out how many engineers they can cram into 
the space not occupied by executive offices and conference rooms.

It's either that or a Cuban bunny rabbit.  I can't remember which.

Ed

----- 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 9:57 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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