[NSRCA-discussion] Pipe Length for 18.1

Dr. Mike Harrison drmikedds at sbcglobal.net
Wed Nov 29 12:51:33 AKST 2006 

Will Do weather permitting..
Mike
----- 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 3:38 PM
Subject: Re: [NSRCA-discussion] Pipe Length for 18.1


> Hey Mike,
> Now I know you are being too modest. For grins, please do the prolonged 
> full throttle test for me.
> When it's all said and done, if it works in the patternn, then nothing 
> else matters!
> I already ordered a few of the 18.5 X 9.5s with an eye toward pitching 
> them up for electric!
> We'll try it real soon on Matt K's Temptress / Webra 160.
> 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 4:16 PM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] Pipe Length for 18.1
>
>
> Dean and Dave
> I don't seem to notice any of those issues.  That doesn't mean it doesn't
> occur.  It could be with these props somehow those issues resolve
> themselves.  Also, you may be more keenly aware than I.  I do fly pretty
> much a light caramel exhaust and lots of smoke, but I have tons of power 
> and
> unlimited vertical.  There are the days of much heat and much humidity 
> with
> crappy air that power may be affected, not sure.
>
> I had the mixture control and the single shim and dual plugs.  I now have 
> no
> mixture control, the original OS head, and 2 shims at the aforementioned
> length.  I am trying to fly a very deliberate moderate pace at about 150
> meters using the 18.5x9.5.   You would have to email Fred at APC to get
> those.  I typically fly about 1/3 to 2/3 throttle on horizontal and a
> gradual transition to full on vertical.  Plane weighs 11 lbs.
>
> Dave, I believe you are correct, I will check, IF I REMEMBER!!!!!
>
> Hope this helps
> Mike
> ----- 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 2:50 PM
> Subject: Re: [NSRCA-discussion] Pipe Length for 18.1
>
>
>> 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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>>>>     NSRCA-discussion at lists.nsrca.org
>>>>     http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>>>
>>>>
>>>>------------------------------------------------------------------------------
>>>>
>>>>
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>>>
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>>
>>
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>
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