Wood grain orientation in a built-up spar

cmyr wrote:
In my effort to learn/remember/practice correct building
procedures,I monitor several wood aircraft design sights. In the
emerauders group,much discussion about using a wingspar that was built
and purchased by another builder. The Emeraud spar consists of 2
laminated built ip beams,w ply intercoastals, and boxed front and rear
w/ply. The spar in question was made with vertical grain wood, and
laminated with the grain perpendicular relative to the wing chord, I
believe the spar caps and laminations should have grain approx.
parallel to the wing chord. If anyone has a definitive answer that may
even prevent an accident go yo yahoo groups,emerauders


You might look at what some of the old timers did--NACA server
http://naca.larc.nasa.gov/search.jsp?No=10&Ne=26&N=17+45+269&Ns=HarvestDate| 1&as=false


strength of one-piece solid, build-up and laminated wood airplane wing beams

Author(s): Nelson, John H
Abstract: The purpose of this report is to summarize the results of all
wood airplane wing beams tested to date in the Bureau of Standards
Laboratory in order that the various kinds of wood and methods of
construction may be compared. ...
NASA Center: NASA (non Center Specific)
Publication Year: 1920=========================(=Lookie here ---1920!!!)
Added to NTRS: 2006-11-06
Accession Number: 93R20355; Document ID: 19930091065; Report Number:
NACA-TR-35



If you are interested--I can give you a blow by blow of how to get
there--or you can write the help desk--as I did.. Jerry

Jerry Wass wrote:

[cmyr]
... The spar in question was made with vertical grain wood, and
laminated with the grain perpendicular relative to the wing chord

[Jerry]
You might look at what some of the old timers did--NACA server
http://naca.larc.nasa.gov/search.jsp?No=10&Ne=26&N=17+45+269&Ns=HarvestDate| 1&as=false



[NACA]
strength of one-piece solid, build-up and laminated wood airplane wing
beams

Author(s): Nelson, John H
Abstract: The purpose of this report is to summarize the results of all
wood airplane wing beams tested to date in the Bureau of Standards
Laboratory in order that the various kinds of wood and methods of
construction may be compared. ...
NASA Center: NASA (non Center Specific)
Publication Year: 1920=========================(=Lookie here ---1920!!!)
Added to NTRS: 2006-11-06
Accession Number: 93R20355; Document ID: 19930091065; Report Number:
NACA-TR-35



If you are interested--I can give you a blow by blow of how to get
there--or you can write the help desk--as I did.. Jerry

This is how I viewed it:

http://naca.larc.nasa.gov/search.jsp?R=961129&id=1&as=false&or=true&qs=Ntt%3 Dnaca-tr-35%26Ntk%3Dall%26Ntx%3Dmode%2Bmatchall%26Ns%3DHarv estDate%257c1%26N%3D286

Despite the angle brackets I placed round the long URL above, it is
almost certain to break when I mail it. Thanks to TINYurl, this is the
short form:
http://tinyurl.com/l4aaxp
Click "View PDF file" (half way down the page with the abstract of
NACA-TR-35 for the online version.)

Notice in the comparison of alternate woods and alternate lamination and
build up methods, the solid I beam is shown with a curved largely
vertical grain orientation in cross section. (Think that was page 357?)

Regards


Brian W

"Brian Whatcott" wrote

Despite the angle brackets I placed round the long URL above, it is almost
certain to break when I mail it. Thanks to TINYurl, this is the short
form:
http://tinyurl.com/l4aaxp
Click "View PDF file" (half way down the page with the abstract of
NACA-TR-35 for the online version.)

Notice in the comparison of alternate woods and alternate lamination and
build up methods, the solid I beam is shown with a curved largely vertical
grain orientation in cross section. (Think that was page 357?)
I got a radiator article when that link was tried. How about this one:

http://naca.larc.nasa.gov/search.jsp?Ns=HarvestDate|1&N=17+45+269&Ntk=all&Nt x=mode%20matchall&Ntt=NACA-TR-35
--
Jim in NC

Morgans wrote:


"Brian Whatcott" wrote

Despite the angle brackets I placed round the long URL above, it is
almost certain to break when I mail it. Thanks to TINYurl, this is the
short form:
http://tinyurl.com/l4aaxp
Click "View PDF file" (half way down the page with the abstract of
NACA-TR-35 for the online version.)

Notice in the comparison of alternate woods and alternate lamination
and build up methods, the solid I beam is shown with a curved largely
vertical grain orientation in cross section. (Think that was page 357?)
I got a radiator article when that link was tried. How about this one:

http://naca.larc.nasa.gov/search.jsp?Ns=HarvestDate|1&N=17+45+269&Ntk=all&Nt x=mode%20matchall&Ntt=NACA-TR-35


Darn it - you're right! But your URL gets me there....

BrianW

On Fri, 26 Jun 2009 00:08:28 GMT, Jerry Wass
wrote:

cmyr wrote:
In my effort to learn/remember/practice correct building
procedures,I monitor several wood aircraft design sights. In the
emerauders group,much discussion about using a wingspar that was built
and purchased by another builder. The Emeraud spar consists of 2
laminated built ip beams,w ply intercoastals, and boxed front and rear
w/ply. The spar in question was made with vertical grain wood, and
laminated with the grain perpendicular relative to the wing chord, I
believe the spar caps and laminations should have grain approx.
parallel to the wing chord. If anyone has a definitive answer that may
even prevent an accident go yo yahoo groups,emerauders


You might look at what some of the old timers did--NACA server
http://naca.larc.nasa.gov/search.jsp?No=10&Ne=26&N=17+45+269&Ns=HarvestDate| 1&as=false


strength of one-piece solid, build-up and laminated wood airplane wing beams

Author(s): Nelson, John H
Abstract: The purpose of this report is to summarize the results of all
wood airplane wing beams tested to date in the Bureau of Standards
Laboratory in order that the various kinds of wood and methods of
construction may be compared. ...
NASA Center: NASA (non Center Specific)
Publication Year: 1920=========================(=Lookie here ---1920!!!)
Added to NTRS: 2006-11-06
Accession Number: 93R20355; Document ID: 19930091065; Report Number:
NACA-TR-35



If you are interested--I can give you a blow by blow of how to get
there--or you can write the help desk--as I did.. Jerry

get the nasa web site up http://naca.larc.nasa.gov and search on the
document id number and you will go straight to it.
Stealth Pilot