Today's Message Index:
----------------------
1. 04:09 PM - lift struts 2 (Bill R)
2. 04:51 PM - Re: lift struts 2 (Gary Boothe)
3. 07:55 PM - Re: Pietenpol-List Digest: 2 Msgs - 10/05/14 (Temp623j)
4. 08:18 PM - Re: lift struts 2 (Clif Dawson)
Message 1
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ok, lets go down this road a little further.
I am still trying to determine if the aluminum lift struts from Carlson A/C are
adequate for a Pietenpol. I know there are Piets out there flying with these
struts,Dan Helspers being one of them. (thanks Dan for your previous response
and detailed photos). But I am still looking at the numbers and have come up
with a very unscientific conclusion. If I built in a big fudge factor by using
a gross weight of 1320 lbs. and stressed the airframe to 6 G's. that comes out
to 7920 lbs. The small lift struts from Carlson has a shear load capacity of
11,600 lbs. If the load is then divided by 4 (4 struts), it would appear that
these aluminum struts are easily capable of of handling the job.
But alas, this is just to simple,I have to be missing something.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=431626#431626
Message 2
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You are. Cabanes share that load. The picture is even better than you
compute.
Gary Boothe
NX308MB
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Bill R
Sent: Tuesday, October 07, 2014 4:09 PM
Subject: Pietenpol-List: lift struts 2
ok, lets go down this road a little further.
I am still trying to determine if the aluminum lift struts from Carlson A/C
are adequate for a Pietenpol. I know there are Piets out there flying with
these struts,Dan Helspers being one of them. (thanks Dan for your previous
response and detailed photos). But I am still looking at the numbers and
have come up with a very unscientific conclusion. If I built in a big fudge
factor by using a gross weight of 1320 lbs. and stressed the airframe to 6
G's. that comes out to 7920 lbs. The small lift struts from Carlson has a
shear load capacity of 11,600 lbs. If the load is then divided by 4 (4
struts), it would appear that these aluminum struts are easily capable of of
handling the job.
But alas, this is just to simple,I have to be missing something.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=431626#431626
Message 3
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Subject: | Re: Pietenpol-List Digest: 2 Msgs - 10/05/14 |
> On Oct 6, 2014, at 3:02 AM, Pietenpol-List Digest Server <pietenpol-list@matronics.com>
wrote:
>
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete Pietenpol-List Digest can also be found in either of the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the Pietenpol-List Digest and can be viewed with a generic text editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 14-10-05&Archive=Pietenpol
>
> Text Version:
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 14-10-05&Archive=Pietenpol
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> Pietenpol-List Digest Archive
> ---
> Total Messages Posted Sun 10/05/14: 2
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 10:34 AM - Re: riblett 612 (nightmare)
> 2. 06:48 PM - Fw: Nose stand (Steven Dortch)
>
>
>
> ________________________________ Message 1 _____________________________________
>
>
> Time: 10:34:49 AM PST US
> Subject: Pietenpol-List: Re: riblett 612
> From: "nightmare" <pauldonahuepilot@yahoo.com>
>
>
> Great info Robert. im building with the 613.5 and making my educated guess on
equal
> cabane lengths as well. we'll see...
>
> --------
> Paul Donahue
> Started 8-3-12
> do not archive
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=431538#431538
>
>
> ________________________________ Message 2 _____________________________________
>
>
> Time: 06:48:35 PM PST US
> Subject: Pietenpol-List: Fwd: Nose stand
> From: Steven Dortch <steven.d.dortch@gmail.com>
>
> Gentlemen, Here is version 2.0 of my nose cradle. Version 1.0 was just a 8
> inch bench with an old Beech Bonanza seatback and a blanket.
>
> Putting it on wheels makes it mobile and gives me at least a foot more room
> for my other plane. Also this clears my cowling and carb.
>
> Made from am $8 (with a coupon) Harbor Freight dolly, scrap 2x6, and scrap
> plywood. the 2X6 is notched to match the prop shape and padded with one
> layer of sleeping pad (the type you camp out with) and a layer of Pipe
> insulation, covered with carpet. The hole in the front is so that I can
> hang it on the prop while I bungee it in. I bungee the cradle onto the prop
> so that when I lower the nose I don't have to aim for the cradle, It is all
> one piece.
>
> When the piet is flying the planes will switch so that I can get the Piet
> out without having to move the Beech Bonanza in and out, I intend on flying
> the piet a lot more than the Vtail.
>
> Blue Skies,
> Steve D.
>
>
>
>
>
>
>
>
Message 4
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Subject: | Re: lift struts 2 |
First off you can't just divide by four. The front strut takes
the larger part of the load and the rear less of it. I'm not
sure what the ratio is on the Piet airfoil though. Most
likely somewhere around a third more.
Second, the load on the wing is vertical but the tensile stress
on the strut is not. The length of the strut is in the
neighbourhood of double the vertical component. So
your strut sees double the value of the lift supported
by that strut. 600lb lifted puts 1200lb tension on the strut.
third, the cabanes carry a portion of the load but not a lot.
I figured all this stuff out some time ago and put it in
some quite intelligent location. Now that my intelligence
has eroded I can't find it!!
Clif
When I was younger, I could remember anything,
whether it happened or not.
Mark Twain
----- Original Message -----
From: "Bill R" <brcapper@gmail.com>
Sent: Tuesday, October 07, 2014 4:09 PM
Subject: Pietenpol-List: lift struts 2
>
> ok, lets go down this road a little further.
> I am still trying to determine if the aluminum lift struts from Carlson
> A/C are adequate for a Pietenpol. I know there are Piets out there flying
> with these struts,Dan Helspers being one of them. (thanks Dan for your
> previous response and detailed photos). But I am still looking at the
> numbers and have come up with a very unscientific conclusion. If I built
> in a big fudge factor by using a gross weight of 1320 lbs. and stressed
> the airframe to 6 G's. that comes out to 7920 lbs. The small lift struts
> from Carlson has a shear load capacity of 11,600 lbs. If the load is then
> divided by 4 (4 struts), it would appear that these aluminum struts are
> easily capable of of handling the job.
> But alas, this is just to simple,I have to be missing something.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=431626#431626
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
>
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