Today's Message Index:
----------------------
1. 06:13 AM - Re: FW: Re: Main Landing Gear Length (Roman Bukolt)
2. 02:20 PM - photos on the list? (Jeff Boatright)
3. 02:29 PM - Re: photos on the list? (Dick Navratil)
4. 02:30 PM - Re: photos on the list? (Matt Dralle)
5. 02:35 PM - Re: FW: Re: Main Landing Gear Length (Dick Navratil)
6. 02:46 PM - Re: Main Landing Gear Length (Catdesigns)
7. 04:04 PM - Thanks for info on attachments (Jeff Boatright)
8. 05:19 PM - Anyone know about Simon McCormick's Piet? (Douwe Blumberg)
9. 05:38 PM - Re: Anyone know about Simon McCormick's Piet? (Peter W Johnson)
10. 06:07 PM - Anyone know about Simon McCormick's Piet? (Peter W Johnson)
11. 06:19 PM - Re: Anyone know about Simon McCormick's Piet? (Catdesigns)
12. 06:21 PM - Re: Main Landing Gear Length (Don Emch)
13. 06:42 PM - Re: Re: Main Landing Gear Length (Catdesigns)
14. 07:55 PM - McCormack's Piet article (santiago morete)
15. 09:00 PM - Wing drag wires and cables (Rcaprd@aol.com)
16. 11:15 PM - Re: Building a Scimitar Prop (Gary Gower)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: FW: Re: Main Landing Gear Length |
My two cents worth. There seems to be WAY too much concern over thie
Deck angle thing. Here's a new low in this extensive database of deck
angles. My angle is 8 1/2 degrees, and you know what? My plane flies
great and the prop doesn't touch the ground on take off or landing.
What Greg says is the real important and only important dimension is the
distance back from the leading edge when the deck angle is level. A
half inch can make a difference in ground handling during take off. My
plane is 6 1/2". Also, Bill Rewey, I believe did some research on this
and he suggested 6 1/2 in. More important than axle location is the
fact that the front cabanes are one inch longer than the rear.
Oh Oh! did I just open a "new can of worms"?
Roman Bukolt NX20795
----- Original Message -----
From: gcardinal
To: pietenpol-list@matronics.com
Sent: Saturday, March 10, 2007 10:29 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
The axle on NX18235 is 6.5" aft of the leading edge of the wing when
in a level attitude.
Greg C.
----- Original Message -----
From: Clif Dawson
To: pietenpol-list@matronics.com
Sent: Saturday, March 10, 2007 8:55 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
The one important thing I have not seen any mention of
in this entire thread is the relationship of axle position
relative to the wing.
Clif
----- Original Message -----
From: Bill Church
To: pietenpol-list@matronics.com
Sent: Friday, March 09, 2007 10:51 AM
Subject: Pietenpol-List: FW: Re: Main Landing Gear Length
Here are a few pics that I imported into a CAD program, then
sketched a few lines over the image, to approximate the "ground level"
and the top longeron, then measured the angle. It's not really precise,
since the pictures are not perfectly parallel to the planes, and the
ground surface becomes "fuzzy" with grass, but it gives an
approximation. One thing that becomes apparent is that there do seem to
be variations in the resulting angles. About a 4 or 5 degree range,
which backs up the calculations arrived at by Chris Tracy.
Overall, I get the feeling that adegree or so this way or that
from the target (13=B0) ain't gonna hurt.
Bill C.
-------------------------------------------------------------------------
-
Date: 3/9/2007 6:53 PM
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | photos on the list? |
Several posts lately have mentioned attached photos. I have not seen
any attachments. I get the digest version of the list. Are
attachments allowed on the regular list but not the digest?
Thanks,
Jeff
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: photos on the list? |
Jeff
That is correct, no photos on digest.
Dick
----- Original Message -----
From: "Jeff Boatright" <jboatri@emory.edu>
Sent: Sunday, March 11, 2007 4:19 PM
Subject: Pietenpol-List: photos on the list?
>
> Several posts lately have mentioned attached photos. I have not seen
> any attachments. I get the digest version of the list. Are
> attachments allowed on the regular list but not the digest?
>
> Thanks,
>
> Jeff
>
>
>
>
>
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: photos on the list? |
Hi Jeff,
For technical reasons, the photos aren't included in the Digest. You can access
them, however, from the Forum interface. Just surf over to the link below and
look for the specific message:
http://forums.matronics.com/viewforum.php?f=7
Best regards,
Matt Dralle
Matronics Email List Admin
At 02:19 PM 3/11/2007 Sunday, you wrote:
>
>Several posts lately have mentioned attached photos. I have not seen
>any attachments. I get the digest version of the list. Are
>attachments allowed on the regular list but not the digest?
>
>Thanks,
>
>Jeff
>
>
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551
925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: FW: Re: Main Landing Gear Length |
I'l see your two cents and raise two cents. The only concern I have on
deck angle is, the steeper the angle, the more important to get the tail
up early on take off. When I first started flying mine, I almost had a
ground stall, not getting the tail up fast enough. Air gets under the
wing, prop effect takes right wing up and plane goes off the side of
runway.
Dick N.
----- Original Message -----
From: Roman Bukolt
To: pietenpol-list@matronics.com
Sent: Sunday, March 11, 2007 8:13 AM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
My two cents worth. There seems to be WAY too much concern over thie
Deck angle thing. Here's a new low in this extensive database of deck
angles. My angle is 8 1/2 degrees, and you know what? My plane flies
great and the prop doesn't touch the ground on take off or landing.
What Greg says is the real important and only important dimension is
the distance back from the leading edge when the deck angle is level. A
half inch can make a difference in ground handling during take off. My
plane is 6 1/2". Also, Bill Rewey, I believe did some research on this
and he suggested 6 1/2 in. More important than axle location is the
fact that the front cabanes are one inch longer than the rear.
Oh Oh! did I just open a "new can of worms"?
Roman Bukolt NX20795
----- Original Message -----
From: gcardinal
To: pietenpol-list@matronics.com
Sent: Saturday, March 10, 2007 10:29 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
The axle on NX18235 is 6.5" aft of the leading edge of the wing when
in a level attitude.
Greg C.
----- Original Message -----
From: Clif Dawson
To: pietenpol-list@matronics.com
Sent: Saturday, March 10, 2007 8:55 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
The one important thing I have not seen any mention of
in this entire thread is the relationship of axle position
relative to the wing.
Clif
----- Original Message -----
From: Bill Church
To: pietenpol-list@matronics.com
Sent: Friday, March 09, 2007 10:51 AM
Subject: Pietenpol-List: FW: Re: Main Landing Gear Length
Here are a few pics that I imported into a CAD program, then
sketched a few lines over the image, to approximate the "ground level"
and the top longeron, then measured the angle. It's not really precise,
since the pictures are not perfectly parallel to the planes, and the
ground surface becomes "fuzzy" with grass, but it gives an
approximation. One thing that becomes apparent is that there do seem to
be variations in the resulting angles. About a 4 or 5 degree range,
which backs up the calculations arrived at by Chris Tracy.
Overall, I get the feeling that adegree or so this way or that
from the target (13=B0) ain't gonna hurt.
Bill C.
------------------------------------------------------------------------
Date: 3/9/2007 6:53 PM
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
Message 6
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Main Landing Gear Length |
Dick,
That is interesting and something I never considered. The only reason I
want the steep deck angle is because I like the look of it.
Chris Tracy
Sacramento, Ca
Website at http://www.Westcoastpiet.com
do not archive
----- Original Message -----
From: Dick Navratil
To: pietenpol-list@matronics.com
Sent: Sunday, March 11, 2007 1:35 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
I'l see your two cents and raise two cents. The only concern I have
on deck angle is, the steeper the angle, the more important to get the
tail up early on take off. When I first started flying mine, I almost
had a ground stall, not getting the tail up fast enough. Air gets under
the wing, prop effect takes right wing up and plane goes off the side of
runway.
Dick N.
----- Original Message -----
From: Roman Bukolt
To: pietenpol-list@matronics.com
Sent: Sunday, March 11, 2007 8:13 AM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
My two cents worth. There seems to be WAY too much concern over
thie Deck angle thing. Here's a new low in this extensive database of
deck angles. My angle is 8 1/2 degrees, and you know what? My plane
flies great and the prop doesn't touch the ground on take off or
landing.
What Greg says is the real important and only important dimension is
the distance back from the leading edge when the deck angle is level. A
half inch can make a difference in ground handling during take off. My
plane is 6 1/2". Also, Bill Rewey, I believe did some research on this
and he suggested 6 1/2 in. More important than axle location is the
fact that the front cabanes are one inch longer than the rear.
Oh Oh! did I just open a "new can of worms"?
Roman Bukolt NX20795
----- Original Message -----
From: gcardinal
To: pietenpol-list@matronics.com
Sent: Saturday, March 10, 2007 10:29 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
The axle on NX18235 is 6.5" aft of the leading edge of the wing
when in a level attitude.
Greg C.
----- Original Message -----
From: Clif Dawson
To: pietenpol-list@matronics.com
Sent: Saturday, March 10, 2007 8:55 PM
Subject: Re: Pietenpol-List: FW: Re: Main Landing Gear Length
The one important thing I have not seen any mention of
in this entire thread is the relationship of axle position
relative to the wing.
Clif
----- Original Message -----
From: Bill Church
To: pietenpol-list@matronics.com
Sent: Friday, March 09, 2007 10:51 AM
Subject: Pietenpol-List: FW: Re: Main Landing Gear Length
Here are a few pics that I imported into a CAD program, then
sketched a few lines over the image, to approximate the "ground level"
and the top longeron, then measured the angle. It's not really precise,
since the pictures are not perfectly parallel to the planes, and the
ground surface becomes "fuzzy" with grass, but it gives an
approximation. One thing that becomes apparent is that there do seem to
be variations in the resulting angles. About a 4 or 5 degree range,
which backs up the calculations arrived at by Chris Tracy.
Overall, I get the feeling that adegree or so this way or that
from the target (13=B0) ain't gonna hurt.
Bill C.
----------------------------------------------------------------------
Date: 3/9/2007 6:53 PM
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/Navigator?Pietenpol-List">http://www.mat
ronics.com/Navigator?Pietenpol-List
href="http://forums.matronics.com">http://forums.matronics.com
Message 7
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Thanks for info on attachments |
Hm. Maybe I need to change back to the "live" list...
Message 8
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Anyone know about Simon McCormick's Piet? |
HI,
Being deeply interested in all Ford powered Piets (as well as all piets
in general) I was wondering if anyone knows how Simon McCormick's Piet
in Australia is doing. Saw a pic of it appearing finished on Chris
Tracy's site.
I'd love to hear or get his email to hear his experiences with the Ford.
Douwe
Message 9
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Anyone know about Simon McCormick's Piet? |
Douwe,
Simon=92s Piet is finished and flying. There was an article about it in
our
SAAA a few months ago. Apparently superb construction.
Cheers
Peter.
Wonthaggi Australia
HYPERLINK "http://www.cpc-world.com/"http://www.cpc-world.com
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Douwe
Blumberg
Sent: Monday, 12 March 2007 12:23 PM
Subject: Pietenpol-List: Anyone know about Simon McCormick's Piet?
HI,
Being deeply interested in all Ford powered Piets (as well as all piets
in
general) I was wondering if anyone knows how Simon McCormick's Piet in
Australia is doing. Saw a pic of it appearing finished on Chris Tracy's
site.
I'd love to hear or get his email to hear his experiences with the Ford.
Douwe
"http://www.matronics.com/Navigator?Pietenpol-List"http://www.matronics.c
om/
Navigator?Pietenpol-List
"http://forums.matronics.com"http://forums.matronics.com
10/03/2007
2:25 PM
--
10/03/2007
2:25 PM
Message 10
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Anyone know about Simon McCormick's Piet? |
Douwe,
I have scanned the article. Files total 1.5Mb. Do you want me to send you a
copy?
Cheers
Peter.
_____
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Douwe
Blumberg
Sent: Monday, 12 March 2007 12:23 PM
Subject: Pietenpol-List: Anyone know about Simon McCormick's Piet?
HI,
Being deeply interested in all Ford powered Piets (as well as all piets in
general) I was wondering if anyone knows how Simon McCormick's Piet in
Australia is doing. Saw a pic of it appearing finished on Chris Tracy's
site.
I'd love to hear or get his email to hear his experiences with the Ford.
Douwe
"http://www.matronics.com/Navigator?Pietenpol-List"http://www.matronics.com/
Navigator?Pietenpol-List
2:25 PM
--
2:25 PM
--
2:25 PM
Message 11
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Anyone know about Simon McCormick's Piet? |
Can I have a copy too? Please...
Chris Tracy
Sacramento, Ca
Website at http://www.Westcoastpiet.com
----- Original Message -----
From: Peter W Johnson
To: pietenpol-list@matronics.com
Sent: Sunday, March 11, 2007 5:07 PM
Subject: Pietenpol-List: Anyone know about Simon McCormick's Piet?
Douwe,
I have scanned the article. Files total 1.5Mb. Do you want me to send
you a copy?
Cheers
Peter.
-------------------------------------------------------------------------
-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Douwe
Blumberg
Sent: Monday, 12 March 2007 12:23 PM
To: pietenpolgroup
Subject: Pietenpol-List: Anyone know about Simon McCormick's Piet?
HI,
Being deeply interested in all Ford powered Piets (as well as all
piets in general) I was wondering if anyone knows how Simon McCormick's
Piet in Australia is doing. Saw a pic of it appearing finished on Chris
Tracy's site.
I'd love to hear or get his email to hear his experiences with the
Ford.
Douwe
-- Date: 10/03/2007 2:25 PM
--
10/03/2007 2:25 PM
--
10/03/2007 2:25 PM
Message 12
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Main Landing Gear Length |
Chris,
Your last post about the reason you are interested in the steep deck angle is the
same reason I was into it, because I liked it. Well I went out to the strip
today and took a few measurements. I screwed up and I'm sorry but I gave you
some wrong numbers. I need to be more careful before I throw out numbers next
time. The top of my longeron at the tailpost is 19 1/2" above the ground.
The top of my longeron at the firewall is 57 5/8". Figuring the length of the
longeron at 172" gives an angle of 12 1/2 degrees. I don't know where I got
my 15 degree thing but it's not! Sorry about that! My tires have a diameter
of 26 1/2". The gear vees are right off of the plans. I didn't write them down
today but they did compare to what was on the plans and I don't recall their
lengths. Keep in mind the split axle vees are longer than the straight axle
vees. The only real change I made in the gear was to lengthen the axles by
2" to accomodate brakes. This gives me a track of about 60". With the bungees
tight the wheels are pulled in slightly. There is about 5 1/2" of vertical
distance between the tops of my tires and the belly. With 1" stringers on the
belly though it brings that to 4 1/2". You know all of this sounds really important
and technical but the truth is, it really is more about aesthetics.
Yeah it's gonna land a little different than the next one, but you just adapt
to it. The cool thing about the Piet is that you can build the structure very
close to the plans and still taylor it to what aesthetically pleases you! This
is one of the things that attracts so many people to the design. Is it just
me or do many other homebuilt designs ( kits especially) just seem to be boring!?
Don Emch
NX899DE
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=100010#100010
Message 13
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Main Landing Gear Length |
Don,
Excellent news! I'm so glad you were wrong :-). I can get 12.5 degrees with
my current jig setup and all I need to do now is cut the legs to size. I
realized today, as I played with my CAD drawing, that I am basically making
the wood gear conform to the steel gear dimensions. Now I know I'm doing it
right and I can proceed with confidence.
A BIG BIG thank you for your effort. I owe you one.
Chris Tracy
Sacramento, Ca
Website at http://www.Westcoastpiet.com
----- Original Message -----
From: "Don Emch" <EmchAir@aol.com>
Sent: Sunday, March 11, 2007 5:21 PM
Subject: Pietenpol-List: Re: Main Landing Gear Length
>
> Chris,
> Your last post about the reason you are interested in the steep deck angle
> is the same reason I was into it, because I liked it. Well I went out to
> the strip today and took a few measurements. I screwed up and I'm sorry
> but I gave you some wrong numbers. I need to be more careful before I
> throw out numbers next time. The top of my longeron at the tailpost is 19
> 1/2" above the ground. The top of my longeron at the firewall is 57 5/8".
> Figuring the length of the longeron at 172" gives an angle of 12 1/2
> degrees. I don't know where I got my 15 degree thing but it's not! Sorry
> about that! My tires have a diameter of 26 1/2". The gear vees are right
> off of the plans. I didn't write them down today but they did compare to
> what was on the plans and I don't recall their lengths. Keep in mind the
> split axle vees are longer than the straight axle vees. The only real
> change I made in the gear was to lengthen the axles by 2" to accomodate
> brakes. This gives me a track of !
> about 60". With the bungees tight the wheels are pulled in slightly.
> There is about 5 1/2" of vertical distance between the tops of my tires
> and the belly. With 1" stringers on the belly though it brings that to 4
> 1/2". You know all of this sounds really important and technical but the
> truth is, it really is more about aesthetics. Yeah it's gonna land a
> little different than the next one, but you just adapt to it. The cool
> thing about the Piet is that you can build the structure very close to the
> plans and still taylor it to what aesthetically pleases you! This is one
> of the things that attracts so many people to the design. Is it just me
> or do many other homebuilt designs ( kits especially) just seem to be
> boring!?
> Don Emch
> NX899DE
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=100010#100010
>
>
>
Message 14
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | McCormack's Piet article |
Peter, could you please send me a copy of the article? I'm building a Ford powered
Piet to. My mail address is moretesantiago@yahoo.com.ar Thank you.
Santiago Morete
---------------------------------
Pregunt. Respond. Descubr.
Todo lo que queras saber, y lo que ni imaginabas,
est en Yahoo! Respuestas (Beta).
Message 15
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Wing drag wires and cables |
In a message dated 3/10/2007 3:19:37 PM Central Daylight Time,
hanover@centramedia.net writes:
what are you guys using as size for the brace cables that run in the same
plane as the wing struts-(the X brace cables.)
I used 3/32" cable for the lift strut X cables. I also used 3/32" for the
drag / anti-drag cables, cabane cables around the front pit, and flipper cables.
I used 1/8" for the rudder cables, and 1/16" cables for the empenage and
tail wheel...the tailwheel cables go all the way up to the inboard portion of the
rudder bar.
Chuck G.
NX770CG
<BR><BR><BR>**************************************<BR> AOL now offers free
email to everyone. Find out more about what's free from AOL at
http://www.aol.com.
Message 16
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Building a Scimitar Prop |
Hello Chuck,
I just found this info about cimiterre propellers. Sorry is in french, but they
say that a photo or drawing is better than a million words... I will ask
a friend to try to translate as much as possible, if he is able to understand
the hand writing :-)
Rcaprd@aol.com wrote: In a message dated 3/7/2007 7:31:56 PM Central Standard
Time, ggower_99@yahoo.com writes:
Hello Chuck,
I will love to learn carve a scimitar prop also, some day, I will appreciate any
lead for info on carving one... Dificult to find this type of info...
Please post as you learn... I carved almost all my props, only bought one for
one ultralight years ago (IVO) not a great prop...
Saludos
Gary Gower.
Hey Gary,
The very best information I have on the Scimitar Prop, is a few short paragraph's,
and a few sketches, from the book by Eric Clutton, called 'PROPELLER MAKING
for the AMATEUR'. I've got the clamps, and the wood for the jig required,
and I'm looking around for prices of a stack of 24 birch planks, measuring 1/4"
thick, 3 1/2" wide, quarter sawn, and 7 feet long.
It's basically the method to get the extreme curves in the wood, to make the
Scimitar. I'm thinking of steaming the 1/4" planks and pre-bending them, before
gluing the stack together. Then place maybe five planks at a time in the
jig, clamp it down with Resorcinol Glue, then clamping down the next series
of planks with glue, and so on with each stack till it's about 6" across, which
is the width of the hub of the prop. I think this stuff works better under
clamping pressure. I use T88 exclusively, but I don't think it would work in
this application, because you're not supposed to clamp it very tightly, but then
if it had a layer of Scrim Cloth, it would maintain the bond line to at least
.002". But then this bond line would probably be much more prevalent than
if it was Resorcinal Glue.
After it's all glued up, I'll use the plan view of the prop that I have drawn
on the top of the flat, straight, steel top table that I use to build props
on. I make a templet for each 6" station of the blade of the prop. Plane the
for and aft faces of the prop hub so they are parallel with each other, and
use a carpenters square to check the plan form of the wood, against the sketch
on the table. Then it's just a matter of whittling away everything that doesn't
look like a Scimitar Propeller !! For the Continental A65, I'm going to
start out with a 74 X 44...maybe even 46 This is certainly a time consuming and
learning process, so I'll have to see what works. I've already started a video
of the beginnings of the planning process.
In the correspondence I had with Eric, it wasn't in his book, but he mentioned
it might be better to use a kind of face plate (about 1/4" thick) on the
forward and aft hub area of the prop, so the clamping pressure wouldn't be against
the edges of the 1/4" planks.
If it is successful, I'm going to build a Scimitar for the 150 hp Tailwind.
Steve Wittman was obviously very much into the Scimitar design, as you can
see on the back wall of his hanger at Pioneer Field in Oshkosh.
Chuck G.
NX770CG
---------------------------------
AOL now offers free email to everyone. Find out more about what's free from AOL
at AOL.com.
---------------------------------
No need to miss a message. Get email on-the-go
with Yahoo! Mail for Mobile. Get started.
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|