Today's Message Index:
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0. 12:29 AM - No "Black Friday" For List Fund Raiser... (Matt Dralle)
1. 02:51 AM - Re: built up spars (ivan.todorovic)
2. 03:36 AM - Re: Re: built up spars (Peter W Johnson)
3. 04:48 AM - Re: Re: built up spars (Ryan Mueller)
4. 05:35 AM - Re: built up spars (ivan.todorovic)
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| Subject: | No "Black Friday" For List Fund Raiser... |
Even though the number of List subscriptions and List posts are up significantly
this year compared to last year, support during this year's List Fund Raiser
has been woefully lagging from last year. There are only a couple more days
left in November and the end of the Fund Raiser is quickly approaching.
I have always preferred a non-commercial List experience as many, many members
have also expressed that they do as well. However, if the yearly fund raiser
cannot generate sufficient funds to keep the bills paid on the List service expenses,
I will have to look into some sort of advertising. Please don't let that
happen!
Your personal contribution of $20 or $30 goes a long ways to keeping the operation
a float. The lunch combo at Carl's Jr costs nearly $10 these days. Isn't
the List worth at least as much as a couple of burgers?
Please make sure your name is on this year's List of Contributors published in
December. The Contribution site is secure, quick, and easy:
http://www.matronics.com/contribution
Thank you in advance for your support!
Matt Dralle
Matronics Email List and Forum Administrator
Message 1
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| Subject: | Re: built up spars |
OK, Peter, I've got it.
I hope I'll draw the rear spar as soon as I get some time. My plans arrived last
week, I've bought a set of Grega plans from James Thursby (Thank's to Matronics
list for finding the available set), and now I'm in "finding wood" phase.
There is no "Aircraft spruce" or shops like that here where I live, as a meter
of fact the spruce doesn't grow on this continent, I have to actually call and
go search the lumberyards (go ahead, laugh). Last but not least - I have to
draw this modification for Riblett I'm planing to build... Busy time ahead.
One more question: This additional width of the spars also needs to make a room
for the spar in the rib wider, but in which direction? On both sides symmetrical
to the center of the spar, or on the inside of the wing, further from the
leading and trailing edge?
Regards,
Ivan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=275198#275198
Message 2
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| Subject: | Re: built up spars |
Ivan,
My Pietenpol plans show the front spar as 1 1/8" and the rear at 1". These
are the same dimensions as the UK plans (7/8" caps with 2 x 1/8" ply for the
front and 3/4" caps with 2 x 1/8" ply on the rear).
I made my ribs first and followed Bernard's plans. I didn't change anything
to get them to fit the box spars.
Cheers
Peter
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of
ivan.todorovic
Sent: Saturday, 28 November 2009 9:51 PM
Subject: Pietenpol-List: Re: built up spars
OK, Peter, I've got it.
I hope I'll draw the rear spar as soon as I get some time. My plans arrived
last week, I've bought a set of Grega plans from James Thursby (Thank's to
Matronics list for finding the available set), and now I'm in "finding wood"
phase. There is no "Aircraft spruce" or shops like that here where I live,
as a meter of fact the spruce doesn't grow on this continent, I have to
actually call and go search the lumberyards (go ahead, laugh). Last but not
least - I have to draw this modification for Riblett I'm planing to build...
Busy time ahead.
One more question: This additional width of the spars also needs to make a
room for the spar in the rib wider, but in which direction? On both sides
symmetrical to the center of the spar, or on the inside of the wing, further
from the leading and trailing edge?
Regards,
Ivan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=275198#275198
Message 3
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| Subject: | Re: built up spars |
Ivan,
At least with the actual Pietenpol plans, when dealing with ribs and
different spar widths (original 1" routed, 3/4" solid, etc) you want to
maintain the 27 3/4" dimension (if my memory is correct) between the front
and rear spar, as this corresponds to the cabane struts coming off the
fuselage.
Or you could think of it as the rear face of the front spar and the front
face of the rear spar being immovable, as constants. If you are going to
increase or decrease spar width you would "move" the front face of the front
spar, or the rear face of the rear spar and adjust your ribs accordingly.
Again, this is with the Pietenpol plans; your mileage may vary with the
Grega Plans.
Ryan
On Sat, Nov 28, 2009 at 4:51 AM, ivan.todorovic <tosha@sezampro.rs> wrote:
> s>
>
> OK, Peter, I've got it.
>
> I hope I'll draw the rear spar as soon as I get some time. My plans arrived
> last week, I've bought a set of Grega plans from James Thursby (Thank's to
> Matronics list for finding the available set), and now I'm in "finding wood"
> phase. There is no "Aircraft spruce" or shops like that here where I live,
> as a meter of fact the spruce doesn't grow on this continent, I have to
> actually call and go search the lumberyards (go ahead, laugh). Last but not
> least - I have to draw this modification for Riblett I'm planing to build...
> Busy time ahead.
>
> One more question: This additional width of the spars also needs to make a
> room for the spar in the rib wider, but in which direction? On both sides
> symmetrical to the center of the spar, or on the inside of the wing, further
> from the leading and trailing edge?
>
> Regards,
> Ivan
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=275198#275198
>
>
Message 4
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| Subject: | Re: built up spars |
Ryan,
Your second option seems logical to me. Luckily, Peter has the original box-spar
plans in his possession, we will see what the designer of Piet box-spar thinks
about that detail.
Ivan
[quote="Ryan Mueller"]Ivan,
At least with the actual Pietenpol plans, when dealing with ribs and different
spar widths (original 1" routed, 3/4" solid, etc) you want to maintain the 27
3/4" dimension (if my memory is correct) between the front and rear spar, as this
corresponds to the cabane struts coming off the fuselage.
Or you could think of it as the rear face of the front spar and the front face
of the rear spar being immovable, as constants. If you are going to increase or
decrease spar width you would "move" the front face of the front spar, or the
rear face of the rear spar and adjust your ribs accordingly. Again, this is
with the Pietenpol plans; your mileage may vary with the Grega Plans.
Ryan
On Sat, Nov 28, 2009 at 4:51 AM, ivan.todorovic wrote:
>
>
> OK, Peter, I've got it.
>
> I hope I'll draw the rear spar as soon as I get some time. My plans arrived
last week, I've bought a set of Grega plans from James Thursby (Thank's to Matronics
list for finding the available set), and now I'm in "finding wood" phase.
There is no "Aircraft spruce" or shops like that here where I live, as a meter
of fact the spruce doesn't grow on this continent, I have to actually call
and go search the lumberyards (go ahead, laugh). Last but not least - I have
to draw this modification for Riblett I'm planing to build... Busy time ahead.
>
> One more question: This additional width of the spars also needs to make a room
for the spar in the rib wider, but in which direction? On both sides symmetrical
to the center of the spar, or on the inside of the wing, further from the
leading and trailing edge?
>
>
> Regards,
> Ivan
>
>
>
>
> Read this topic online here:
>
>
> http://forums.matronics.com/viewtopic.php?p=275198#275198 (http://forums.matronics.com/viewtopic.php?p=275198#275198)
>
>
>
>
>
>
>
>
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> et="_blank">www.homebuilthelp.com
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> le, List Admin.
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> st" target="_blank">http://www.matronics.com/Navigator?Pietenpol-List
> ==========
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=275202#275202
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