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Think you've heard all the stupid questions people can ask?.

 
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expresstechonsite
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PostPosted: Fri May 26, 2006 10:52 am    Post subject: Think you've heard all the stupid questions people can ask?. Reply with quote



Ok... I'm sure most anyone that reads this will think I'm an idiot, but

I'm so curious...

Could I build an ultralight airframe from EMT (electrical conduit) from

the local hardware store? I know that welding it would be inadvisable
due to the fact that it is galvanized (although I understand that
galvanizing can be 'stripped' thru use of an acid solution) but are
there other differences between standard hardware store emt tubing and
the steel tubing recommended for aircraft construction?

And now for the REALLLY stupid question... what about using PVC tubing?

I know that PVC is much more flexible than steel or aluminum tube, but

could it work? The reason I ask is because I keep thinking that if we
once made airframes out of wood, then wouldn't PVC be just about as
strong and more durable (long lasting?).

Rich

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expresstechonsite
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PostPosted: Fri May 26, 2006 11:34 am    Post subject: Re: Think you've heard all the stupid questions people can a Reply with quote



I should've also asked if there are any commonly available materials at
the local homedepot or acehardware type stores that I could use to
build my ultralight?
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JKimmel
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PostPosted: Fri May 26, 2006 9:35 pm    Post subject: Re: Think you've heard all the stupid questions people can a Reply with quote

expresstechonsite wrote:
Quote:
I should've also asked if there are any commonly available materials at
the local homedepot or acehardware type stores that I could use to
build my ultralight?

Wood, glue, screws, nails, cable, cable swagers, paint, fiberglass,

resin, plexiglass, etc.

--
J Kimmel
myname (AT) whereIwork (DOT) com
www.metalinnovations.com

"Cuius testiculos habes, habeas cardia et cerebellum." - When you have
their full attention in your grip, their hearts and minds will follow.
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Dana M. Hague
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PostPosted: Sat May 27, 2006 3:31 am    Post subject: Re: Think you've heard all the stupid questions people can a Reply with quote

On 25 May 2006 22:52:46 -0700, "expresstechonsite"
<rich (AT) expresstechonsite (DOT) com> wrote:

Quote:
Could I build an ultralight airframe from EMT (electrical conduit) from

the local hardware store?

Yes, you could. I would even be quite safe, since it would be too
heavy to ever leave the ground.

Quote:
...if we
once made airframes out of wood, then wouldn't PVC be just about as
strong and more durable (long lasting?).

Don't even THINK about it. PVC has nowhere NEAR the strength to
weight ratio of wood.

When you build an aircraft, you use aircraft quality materials... if
you want to live.

-Dana
--
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If replying by email, please make the obvious changes.
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1200 bps used to seem so fast!
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Gilan
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PostPosted: Mon Jul 03, 2006 6:11 am    Post subject: Re: Think you've heard all the stupid questions people can a Reply with quote

OK Rich
I'm sure your question is just a joke.
or
Are you trying to win a Darwin award???

--
Have a good day and stay out of the trees!
See ya on Sport Aircraft group
http://groups.yahoo.com/group/Sport_Aircraft/


"expresstechonsite" <rich (AT) expresstechonsite (DOT) com> wrote in message
news:1148622766.013964.9680 (AT) g10g2000cwb (DOT) googlegroups.com...
Quote:
Ok... I'm sure most anyone that reads this will think I'm an idiot, but

I'm so curious...

Could I build an ultralight airframe from EMT (electrical conduit) from

the local hardware store? I know that welding it would be inadvisable
due to the fact that it is galvanized (although I understand that
galvanizing can be 'stripped' thru use of an acid solution) but are
there other differences between standard hardware store emt tubing and
the steel tubing recommended for aircraft construction?

And now for the REALLLY stupid question... what about using PVC tubing?

I know that PVC is much more flexible than steel or aluminum tube, but

could it work? The reason I ask is because I keep thinking that if we
once made airframes out of wood, then wouldn't PVC be just about as
strong and more durable (long lasting?).

Rich
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Stache
Guest





PostPosted: Sat Jul 08, 2006 9:00 pm    Post subject: Re: Think you've heard all the stupid questions people can a Reply with quote

Quote:
Could I build an ultralight airframe from EMT (electrical conduit) from

the local hardware store? I know that welding it would be inadvisable
due to the fact that it is galvanized (although I understand that
galvanizing can be 'stripped' thru use of an acid solution) but are
there other differences between standard hardware store emt tubing and
the steel tubing recommended for aircraft construction?

And now for the REALLLY stupid question... what about using PVC tubing?

I know that PVC is much more flexible than steel or aluminum tube, but

could it work? The reason I ask is because I keep thinking that if we
once made airframes out of wood, then wouldn't PVC be just about as
strong and more durable (long lasting?).

Rich

You can build an aircraft out of anything you want, trying to get

certificated to fly is a different story. Stuff that comes from you
local hardware store does not meet aircraft standards and the material
will fail.

Engineers have spent a lot of time testing materials from nut, bolts,
glues, woods, fibers, plastics and others material to make sure they
can take the five major stresses. In flight the five major stresses
compression, tension, shear, torsion, and bending are present and
acting at the same time on every thing at once.

You would have to know what stresses are at work and what type of
material could take the stress. Electrical conduit is not one of the
materials that can take stress or is PVC.

Stache
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