Today's Message Index:
----------------------
1. 03:46 AM - Re: Aluminum head (helspersew@aol.com)
2. 05:18 AM - Re: Aluminum Head (womenfly2)
3. 05:56 AM - Mountain Piet Mending Update (Greg Bacon)
4. 06:06 AM - Re: Aluminum Head (Brett Phillips)
5. 07:04 AM - Re: Aluminum Head (womenfly2)
6. 04:08 PM - Re: Re: Aluminum Head (helspersew@aol.com)
Message 1
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| Subject: | Re: Aluminum head |
Hey Larry- Not so fast. Mine is nose heavy with the Aluminum head.
Dan Helsper
Puryear, TN
-----Original Message-----
From: Lawrence Williams <lnawms@yahoo.com>
Sent: Mon, Nov 21, 2011 7:56 pm
Subject: Pietenpol-List: Aluminum head
Fred-
why in the world would you want an aluminum head? Get a good iron head (the
heavier the better) and you won't be perpetually fighting a tail-heavy aer
oplane.
Larry
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Message 2
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| Subject: | Re: Aluminum Head |
helspersew(at)aol.com wrote:
> How do you know it was in fact 59 HP? 82 inches seems very long. What was the
ground clearance?
>
> Dan Helsper
> Puryear, TN
>
>
>
> --
Calculated with actual numbers from flight testing. Wheels 18" rims with tyres,
23" OD. Fuselage was from the Flying & Glider Manual and the deepest dimension
mid cockpits is 24" per plans. Prop had 6" ground clearance with stretched bungees
with top fuselage longeron leveled.
--------
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=358793#358793
Message 3
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| Subject: | Mountain Piet Mending Update |
Epoxy varnish is completed on both the new center section and wing.
Covering is next. Also, a few days ago, a local A&P mechanic stopped by
to inspect my work prior to covering. He took a bunch of photos and said
it looked "marvelous", so I'm feeling a lot better about that first flight.
After final assembly, he will check it out again and issue a ferry permit.
I'll fly it to his shop for it's first annual in 7 years. My goal is to
get this done this Winter, weather permitting.
I'm still in need of 3 yards of 3 inch bias cut tape. If anyone has some,
please contact me off line at gbacon67@gmail.com so we can work out a
purchase/trade. Thanks
Greg Bacon
Prairie Home, MO
Message 4
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| Subject: | Re: Aluminum Head |
Larry has a good point! If your airplane is already tail heavy, a good cast iron
head would be a much better fix than adding lead to the nose. The iron heads
are thought to be more stable and resistant to warping too. Mr Pietenpol's
first Air Campers were all flown with the stock iron heads. It wasn't until
the early-mid thirties that he began recommending the high compression heads (which
happened to be aluminum).
Regarding propellers: The propeller Mr Pietenpol recommended for the Model A in
the Flying and Glider manual article was a WWI surplus item intended for use
on the 28 HP Lawrance powered Breese Penguin like this one:
http://www.woodenpropeller.com/LangLawrance.html
Note that it measures 2000mm x 1000mm (78.74 x 39.37). Mr Pietenpol later revised
his recommendation to a smaller diameter and steeper pitch. I wonder if this
was for economic reasons (no more cheap surplus props), or performance reasons?
I know, more questions than answers....
Brett Phillips
Strasburg, VA
NX311GP
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=358799#358799
Message 5
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| Subject: | Re: Aluminum Head |
.... if using an aluminum head on the Model-A, best to lengthen your motor mount
to balance her. Heavy aft CG depends more on the pilots weight in rear cockpit.
You want to be more in the torque curve on the Model-A, 1600-1800 RPM.
--------
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=358810#358810
Message 6
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| Subject: | Re: Aluminum Head |
That 6" ground clearance is too close for comfort. I think Bingelis recomme
nds 9 or 11, can't remember. Please explain the formula for flight-testing
H.P. calculation.
Dan Helsper
Puryear, TN
-----Original Message-----
From: womenfly2 <Love2Fly.KAP@gmail.com>
Sent: Tue, Nov 22, 2011 7:18 am
Subject: Pietenpol-List: Re: Aluminum Head
elspersew(at)aol.com wrote:
How do you know it was in fact 59 HP? 82 inches seems very long. What was
the
round clearance?
Dan Helsper
Puryear, TN
--
alculated with actual numbers from flight testing. Wheels 18" rims with tyr
es,
3" OD. Fuselage was from the Flying & Glider Manual and the deepest dimensi
on
id cockpits is 24" per plans. Prop had 6" ground clearance with stretched
ungees with top fuselage longeron leveled.
--------
ead this topic online here:
http://forums.matronics.com/viewtopic.php?p=358793#358793
-
-= -- Please Support Your Lists This Month --
-= (And Get Some AWESOME FREE Gifts!)
-
-= November is the Annual List Fund Raiser. Click on
-= the Contribution link below to find out more about
-= this year's Terrific Free Incentive Gifts provided
-= by:
-=
-= * AeroElectric www.aeroelectric.com
-= * The Builder's Bookstore www.buildersbooks.com
-= * HomebuiltHELP www.homebuilthelp.com
-
-= List Contribution Web Site:
-
-= --> http://www.matronics.com/contribution
-
-= Thank you for your generous support!
-
-= -Matt Dralle, List Admin.
-
-========================
-= - The Pietenpol-List Email Forum -
-= Use the Matronics List Features Navigator to browse
-= the many List utilities such as List Un/Subscription,
-= Archive Search & Download, 7-Day Browse, Chat, FAQ,
-= Photoshare, and much much more:
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-= --> http://www.matronics.com/Navigator?Pietenpol-List
-
-========================
-= - MATRONICS WEB FORUMS -
-= Same great content also available via the Web Forums!
-
-= --> http://forums.matronics.com
-
-========================
-= - List Contribution Web Site -
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-= -Matt Dralle, List Admin.
-= --> http://www.matronics.com/contribution
-========================
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