- Donald Reid said;
There is a lot of science involved in structural design and it is
certainly
one area in which you do not want to do something stupid.
Another "design" method is TLAR, which stands for THAT LOOKS ABOUT
RIGHT. But that's not design. On another issue, I've seen many threads
Brian Kraut wrote:
> From the FAA A.C. 43.13 (You have read the FAA bible, havn't you?):
I was thinking it was more like the Necronomicron ;)
> 1-43. REPLACING SOLID TYPE SPARS WITH LAMINATED TYPE SPARS
> Solid spars may be replaced with laminated spars or vice versa,
> provided the material is o
Donald Reid wrote:
>
> You do NOT want to make spar caps out of plywood. In the FAA
> reference, they are talking about laminating using with the wood
> fibers oriented along the length of the spar. The grain may be
> oriented in a variety of different ways in spar lamination, but the
> wood fi
You do know that if you make them the way the plans call for and don't try
to reinvent the wheel,you will be done sooner which means flying sooner.The
spars in the plans and the ones for the AS50xx have been proven and they do
work rather well.Again just a thought...
>
> Again, there was never any
"Bubba" wrote:
> (Note: the above opinion was checked out with both a mechanical engineer
and
> an aerospace engineer. Both agreed 100%)
Maybe you should know that Don is BOTH a mechanical AND an aerospace
engineer, and he's obsessed with structures and airfoils. You'd probably
know that if you'
Bubba wrote:
> Again, there was never any discussion of using plywood for spar caps.
Maybe not from you, but I seem to remember something like:
"Don't forget, most laminates (such as plywood) are stronger as compared
to a solid peice of wood the same thickness because of the different
grain ori
At 10:34 PM 2/9/2005, you wrote:
>Donald Reid wrote:
> >
> > You do NOT want to make spar caps out of plywood. In the FAA
> > reference, they are talking about laminating using with the wood
> > fibers oriented along the length of the spar. The grain may be
> > oriented in a variety of different
Don't forget, most laminates (such as plywood) are stronger as compared
to a solid peice of wood the same thickness because of the different
grain orientations.
+++
I also believe this - so here is a question for the knowledgeable among
us:
How about making up wing spar caps out
> Using 5 ply must surely result in a bullet proof spar?
You don't mean 5 ply PLYwood do you? Because two of the five plies in
plywood run perpindicular to the other three, it would be weaker than solid
wood when used in the "unidirectional" application of a spar cap.
But to answer somebody's q
Stephen Jacobs wrote:
>
> I also believe this - so here is a question for the knowledgeable
> among us:
>
> How about making up wing spar caps out of several laminations of ply?
> As we are taught, a good scarf makes for any length you like without
> any strength compromise.
>
> 8 x 1/4" lamination
Hi, all;
Wouldn't that make for a really heavy spar (solid plywood)? Unless
you're just talking laminated spar CAPS.
Paul
Kr2s
- Original Message -
>Paul Wrote>
> >unless you're just talking laminated spar CAPS.
>
>> If laminations are as strong as I think they are, why couldn't a person
laminate a well grained piece of pine for spar caps?
Pat Driscoll
Saint Paul, MN 55102
patric...@usfamily.net>
> _
patric...@usfamily.net wrote:
>
> If laminations are as strong as I think they are, why couldn't a
> person laminate a well grained piece of pine for spar caps?
Yup, just have to calculate the strength and make sure it's suitable. Also
have to make sure the wood is durable enough. It would suck m
2005 8:00 AM
Subject: Re: KR> To laminate or not ...
> Stephen Jacobs wrote:
>>
>> I also believe this - so here is a question for the knowledgeable
>> among us:
>>
>> How about making up wing spar caps out of several laminations of ply?
>> As we are tau
:
To: "KRnet"
Sent: Tuesday, February 08, 2005 11:10 AM
Subject: Re: KR> To laminate or not ...
>
> - Original Message -
>
>>Paul Wrote>
>> >unless you're just talking laminated spar CAPS.
>>
>>> If laminations are as strong
patrusso wrote:
> Not a good idea. Not all the plys are going in the direction you
> would want them to for the spar. There are many planes with plywood
> spars but they are usually capped with a solid timber.
We're not talking about going down to Home Depot and getting a sheet of 1"
CDX. All the
52 PM
To: KRnet
Subject: Re: KR> To laminate or not ...
patrusso wrote:
> Not a good idea. Not all the plys are going in the direction you
> would want them to for the spar. There are many planes with plywood
> spars but they are usually capped with a solid timber.
We're not talking
I know the
>design, built to plans, is more than strong enough, but I'd really like to
>put the dihedral break in the middle of the fuselage instead of out in the
>airstream.
>Steve
=
If you're looking for pure speed, why have any dihedral at all
larry flesner wrote:
>
> If you're looking for pure speed, why have any dihedral at all ??
>
> Dihedral = stability and stability = drag ? Or has my brain exceeded
>
> Vne?
Yeah it's probably a little more drag, but I kinda like it when my landing
gear would rather point down than up ;)
--
Stev
yeah, thats the kind of real bad gear up landings.
Jim
On Tue, 8 Feb 2005 18:22:52 -0600 "Bubba" writes:
> larry flesner wrote:
> >
> > If you're looking for pure speed, why have any dihedral at all ??
> >
> > Dihedral = stability and stability = drag ? Or has my brain
> exceeded
> >
> > Vne?
>
o: KRnet
Subject: Re: KR> To laminate or not ...
Stephen Jacobs wrote:
>
> I also believe this - so here is a question for the knowledgeable
> among us:
>
> How about making up wing spar caps out of several laminations of ply?
> As we are taught, a good scarf makes for any
At 08:07 PM 2/8/2005, you wrote:
> >From the FAA A.C. 43.13 (You have read the FAA bible, havn't you?):
>
>1-43. REPLACING SOLID TYPE SPARS WITH LAMINATED TYPE SPARS
>Solid spars may be replaced with laminated spars or vice versa, provided the
>material is of the same high quality.
>
>There is also
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