How it's Made - Gliders

[Craig[_2_]]

I just ran across this for those of you who missed this segment on
Discovery Channel.
http://www.youtube.com/watch?v=VxhwkM0ZXRM

Craig

[Paul Remde]

Part 1 of that episode is available in the link below. Start at 5:35 for
the glider part.
http://www.youtube.com/watch?v=lwiF8pi26Nc

Paul Remde

"Craig" > wrote in message
...
>I just ran across this for those of you who missed this segment on
> Discovery Channel.
> http://www.youtube.com/watch?v=VxhwkM0ZXRM
>
> Craig
>

[Greg Arnold[_2_]]

Interesting -- SH is vacuum bagging the wings, and then curing in an
oven. I didn't know they were so high tech.


Paul Remde wrote:
> Part 1 of that episode is available in the link below. Start at 5:35 for
> the glider part.
> http://www.youtube.com/watch?v=lwiF8pi26Nc
>
> Paul Remde
>
> "Craig" > wrote in message
> ...
>> I just ran across this for those of you who missed this segment on
>> Discovery Channel.
>> http://www.youtube.com/watch?v=VxhwkM0ZXRM
>>
>> Craig
>>
>
>

[Mike the Strike]

On Mar 2, 8:05*pm, Greg Arnold > wrote:
> Interesting -- SH is vacuum bagging the wings, and then curing in an
> oven. *I didn't know they were so high tech.
>

Ssshh! Everyone will want one!

Mike

[[email protected]]

On Mar 2, 10:05*pm, Greg Arnold > wrote:
> Interesting -- SH is vacuum bagging the wings, and then curing in an
> oven. *I didn't know they were so high tech.
>
>
>
> Paul Remde wrote:
> > Part 1 of that episode is available in the link below. *Start at 5:35 for
> > the glider part.
> >http://www.youtube.com/watch?v=lwiF8pi26Nc
>
> > Paul Remde
>
> > "Craig" > wrote in message
> ...
> >> I just ran across this for those of you who missed this segment on
> >> Discovery Channel.
> >>http://www.youtube.com/watch?v=VxhwkM0ZXRM
>
> >> Craig- Hide quoted text -
>
> - Show quoted text -

The resins used in our modern gliders must be cured at 60 deg C for 12
hrs or more to achieve their full strength properties. Since you can't
see that the carbon cloth is completely wetted out, vacuum bagging is
used so that a minumum of excess resin is required. Not as low a resin
content as autoclaved prepreg but much less costly in terms of
equipment and tooling required since molds don't have to remain stable
at very high temperatures. Also more practical to field repair due to
materials used.
No axes are required to build a modern sailplane- nor rocks and
chisels.
Cool to see our stuff shown on TV.
UH

[Eric Greenwell]

Greg Arnold wrote:

>>
>> "Craig" > wrote in message
>> ...
>>> I just ran across this for those of you who missed this segment on
>>> Discovery Channel.
>>> http://www.youtube.com/watch?v=VxhwkM0ZXRM

> Interesting -- SH is vacuum bagging the wings, and then curing in an
> oven. I didn't know they were so high tech.

Vacuum bagging has been used for many decades, even by people repairing
gliders, and you'll know it's "high tech" oven curing only when you can
order your new Ventus painted red!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* Sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

[Steve Leonard[_2_]]

Anyone else notice that when the wing is being put on during the assembly,
one of the auto hookups misses? Watch closely at 3:15 into Part 2.

Oops! I bet the "amatuers" that assembled and launched the Discus in
under a minute didn't have that problem!

Steve

[Derek Copeland[_2_]]

Hmmm! Just as I had always suspected, there is a connection between gliding
and bell ringing!

Some of it looks more like cookery than engineering! Mix some ingredients
together and then bake in an oven for x hours!

Derek


At 20:56 02 March 2009, Craig wrote:
>I just ran across this for those of you who missed this segment on
>Discovery Channel.
>http://www.youtube.com/watch?v=VxhwkM0ZXRM
>
>Craig
>
>

[The Real Doctor]

On 3 Mar, 13:39, wrote:
> Since you can't
> see that the carbon cloth is completely wetted out, vacuum bagging is
> used so that a minumum of excess resin is required.

Presumably it also helps to outgas the resin as much as possible. I
spent a couple of years of my life developing a standard test for
measuring resin-matrix bonds in composites...

> No axes are required to build a modern sailplane- nor rocks and
> chisels.

The final hand finishing is still pretty primitive!

Ian

[Andy[_1_]]

On Mar 3, 7:30*pm, Steve Leonard > wrote:
> Anyone else notice that when the wing is being put on during the assembly,
> one of the auto hookups misses? *Watch closely at 3:15 into Part 2.

I didn't see that first time but yes, it did miss and roll down the
side of the fuselage didn't it. Is that possible with everything
rigged properly?

Andy

[Tuno]

That happened to me a few times with my Ventus 2C. The wing stops well
short of being seated. A simple matter of watching the hooks as the
wing is being inserted.

[bildan]

On Mar 5, 8:16*am, Tuno > wrote:
> That happened to me a few times with my Ventus 2C. The wing stops well
> short of being seated. A simple matter of watching the hooks as the
> wing is being inserted.

This is most likely just an artifact of "movie making" - the shot was
staged for the camera. The worker was probably told by the director
to "insert the wing and walk away". Editors choose the best clips
available and hope no one notices the unavoidable screw-ups. Actors
just ignore set glitches and try to look like nothing happened.
There's a lot of this sort of thing that finds it's way into theater
films. There are web sites based on it.

I presume there's no real safety issue since, as has been pointed out,
the wings won't fully seat so the wing pins can be inserted unless the
control hookups engage properly.

[bildan]

On Mar 3, 7:30*pm, Steve Leonard > wrote:
> Anyone else notice that when the wing is being put on during the assembly,
> one of the auto hookups misses? *Watch closely at 3:15 into Part 2.
>
> Oops! *I bet the "amatuers" that assembled and launched the Discus in
> under a minute didn't have that problem!
>
> Steve

FYI, the "Worlds Fastest Glider Assembly" video has been expanded to
show training of the team members and trial assemblies before the
camera rolled for the final cut - presumably due to criticism that it
looked unsafe. It looks to me as if the Fins did a fine job.

[Steve Leonard[_2_]]

I also know that it IS possible to assmble an ASG-29 with a "miss"
similar to this. I got to help remove a wing, get it right, and put the
pins back in on the grid at a contest. The driver went in the fuselage,
but missed the cup in the fuselage.

The moral of my comment was that just because there are automatic hookups
doesn't mean they will always hook up. I am pretty sure I can get the
wings on my Austria and miss one of its auto hookups. On SH and
Glasflugel stuff, if a control surface is held full travel one way, this
will very likely happen. So, when I am helping my friend with his
Mosquito, I make sure I get the aileron near neutral as we are sliding the
wings home (he has a mid-aileron leading edge dolly that is held in place
with a loop of big bore surgical tubing that can set teh aileron against
the up stop.)

I am also quite aware of how shots are made and assembled for a piece like
that shown on "How it's made." Ever notice how many shots in "The Boy
Who Flew With Condors" have the registration number on the 1-26
backwards? And how many times his hair parts first on the left, then on
the right and back to the left in one flight? Some of us don't have to
worry about combing our hair back and forth during a flight! :-) I
remember discussions about "Why did the towplane break right when the
glider released?" Because the film was flipped around!

Steve Leonard

[Dave Doe]

In article >,
says...
> Interesting -- SH is vacuum bagging the wings, and then curing in an
> oven. I didn't know they were so high tech.

Standard stuff ain't it?

--
Duncan

[Peter Purdie[_4_]]

They were doing this when I first visited SH in '71 (and I don't expect
the other major manufacturers were doing anything different). Nothing
new.

At 11:37 10 March 2009, Dave Doe wrote:
>In article ,
>says...
>> Interesting -- SH is vacuum bagging the wings, and then curing in an
>> oven. I didn't know they were so high tech.
>
>Standard stuff ain't it?
>
>--
>Duncan
>