[NSRCA-discussion] Pipe Length for 18.1
Ed Miller
edbon85 at charter.net
Wed Nov 29 13:20:40 AKST 2006
Speaking of weather, today in Knoxville TN, or Harriman where I fly was 73
degrees, partly sunny and just a very light breeze. Been out flying 4 of
the last 6 days. Still have a bit to go with the new Masters schedule
though.
Ed M.
----- Original Message -----
From: "Dr. Mike Harrison" <drmikedds at sbcglobal.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, November 29, 2006 4:50 PM
Subject: Re: [NSRCA-discussion] Pipe Length for 18.1
> 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
>>>>>
>>>>>
>>>>>----------------------------------------------------------------------------
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> NSRCA-discussion mailing list
>>>>> NSRCA-discussion at lists.nsrca.org
>>>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>>>>
>>>>>
>>>>>------------------------------------------------------------------------------
>>>>>
>>>>>
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>>>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>>>
>>>>
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