Today's Message Index:
----------------------
1. 01:27 AM - Re: prop info (Rcaprd@aol.com)
2. 06:59 AM - Re: prop info (Carbarvo@aol.com)
3. 09:19 AM - Firewall Bulkhead Insulation (Lynn & Doris Knoll)
4. 01:00 PM - [ Bill Sayre ] : New Email List Photo Share Available! (Email List Photo Shares)
5. 06:28 PM - prop info (Oscar Zuniga)
6. 09:18 PM - Prop Info (Rcaprd@aol.com)
Message 1
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--> Pietenpol-List message posted by: Rcaprd@aol.com
In a message dated 10/17/03 8:58:20 AM Central Daylight Time,
BARNSTMR@aol.com writes:
<< Chuck,
Where can I get a copy of Cluton's book? Whats the name of the book? >>
Terry, et all,
The name of the book is 'Propeller Making for the Amature' by Eric
Clutton. He's British. You can get it from EAA library, and it only costs about
8
bucks or so. It is a MUST READ TWICE if you are even thinking about building
a prop. He gives building methods & tips, and all the formulas for
estimating the pitch and diameter for a given horsepower / airframe, but he notes
a
preferred method is to use previous a successful combination of Prop / Powerplant
/ Airframe.
He goes into detail how to build a Scimitar Prop - where the blade tips
are swept back quite a bit. I've done some research on this type of prop, but
for the life of me I can't figure out why everybody doesn't use this design
prop. There are six Scimitar Props hanging in Steve Wittman's hanger. It's
like an automatic blade pitch, with no moving parts. At high R.P.M. for take
off, using cintrifugal force and aerodynamic twisting force the wood prop blade
angle is reduced for more thrust. When airborn and power is reduced, the prop
'unloads', the blade angle relax's and you have a higher blade angle for more
efficient cruise. What more could you want ??? !!! To be honest, it would
require quite a bit more work to build one using the 'Cluton' method, and I
suppose with all the flexing the blades are exposed to, there would be more of
a
chance for a blade to fail.
I did read one story about a W W 1 pilot that had a Scimitar prop. It
seems his opponent was on his tail slinging lead at him, so he went into a full
power dive. Overspeed the engine, and over ran the prop when the blades began
to 'flutter' just before a blade failed and broke off. He was having a bad
day. Not sure if he made it.
Chuck G.
Message 2
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--> Pietenpol-List message posted by: Carbarvo@aol.com
Chuck...I don't know if this is the kind of input you want at this stage, but
I have a 3/4 scale reproduction of a 1917 Paragon propeller which was hand
carved from mahogany by the guy I bought a Pietenpol project from. It is a
scimitar which is 75" long. I understand that the original propeller was used on
an
airship. I have a picture of it, but no data. I don't see how this can be of
much help to you except inspiration...It's beautiful.....Carl Vought.....do
not archive
Message 3
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| Subject: | Firewall Bulkhead Insulation |
--> Pietenpol-List message posted by: "Lynn & Doris Knoll" <dknoll@cox.net>
Tony B. recommends a layer of fabric called ZETEX be installed behind the metal
firewall. I emailed the Newtex Corp. for info but no response.
What did you guys use?
Lynn Knoll
Wichita
Message 4
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| Subject: | [ Bill Sayre ] : New Email List Photo Share Available! |
--> Pietenpol-List message posted by: Email List Photo Shares <pictures@matronics.com>
A new Email List Photo Share is available:
Poster: Bill Sayre <william.g.sayre@boeing.com>
Subject: Front shoulder harness
http://www.matronics.com/photoshare/william.g.sayre@boeing.com.10.18.2003/index.html
o Main Photo Share Index
http://www.matronics.com/photoshare
o Submitting a Photo Share
If you wish to submit a Photo Share of your own, please include the
following information along with your email message and files:
1) Email List or Lists that they are related to:
2) Your Full Name:
3) Your Email Address:
4) One line Subject description:
5) Multi-line, multi-paragraph description of topic:
6) One-line Description of each photo or file:
Email the information above and your files and photos to:
pictures@matronics.com
Message 5
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--> Pietenpol-List message posted by: "Oscar Zuniga" <taildrags@hotmail.com>
I forgot to mention (about my Tennessee Props prop) that I have painted the
prop tips yellow to provide a visible arc to help ground recognition when
the engine is running, and also painted the backsides of the blades flat
black to cut any glare or reflections back into my eyes.
Wouldn't want to lose sight of Der Faker Fokker in my gunsights ahead if
there is some glare off the prop ;o)
Oscar Zuniga
San Antonio, TX
mailto: taildrags@hotmail.com
website at http://www.flysquirrel.net
Never get a busy signal because you are always connected with high-speed
Internet access. Click here to comparison-shop providers.
https://broadband.msn.com
Message 6
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--> Pietenpol-List message posted by: Rcaprd@aol.com
In a message dated 10/17/03 8:58:20 AM Central Daylight Time,
BARNSTMR@aol.com writes:
<< Chuck,
Where can I get a copy of Cluton's book? Whats the name of the book? >>
Terry, et all,
The name of the book is 'Propeller Making for the Amature' by Eric
Clutton. He's British. You can get it from EAA library, and it only costs about
8
bucks or so. It is a MUST READ TWICE if you are even thinking about building
a prop. He gives building methods & tips, and all the formulas for
estimating the pitch and diameter for a given horsepower / airframe, but he notes
a
preferred method is to use previous a successful combination of Prop / Powerplant
/ Airframe.
He goes into a little detail about how to build a Scimitar Prop - where
the blade tips are swept back quite a bit. I've done some research on this
type of prop, but for the life of me I can't figure out why everybody doesn't use
this design prop. There are six Scimitar Props hanging in Steve Wittman's
hanger. It's like an automatic blade pitch, with no moving parts. At high
R.P.M. for take off, using cintrifugal force and aerodynamic twisting force the
wood prop blade angle is reduced for more thrust. When airborn and power is
reduced, the prop 'unloads', the blade angle relax's and you have a higher blade
angle for more efficient cruise. What more could you want ??? !!! To be
honest, it would require quite a bit more work to build one using the 'Cluton'
method, and I suppose with all the flexing the blades are exposed to, there
would be more of a chance for a blade to fail.
I did read one story about a W W 1 pilot that had a Scimitar prop. It
seems his opponent was on his tail slinging lead at him, so he went into a full
power dive. Overspeed the engine, and over ran the prop when the blades began
to 'flutter' just before a blade failed and broke off. He was having a bad
day. Not sure if he made it.
Chuck G.
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