Actually I'm interested also to know if any other designs besides BD
aircraft utilize wing spars that are made of aluminum tube.

So if you know of any I'd like to know what they are.

On Mar 17, 4:41 pm, wrote:
> Actually I'm interested also to know if any other designs besides BD
> aircraft utilize wing spars that are made of aluminum tube.
>
> So if you know of any I'd like to know what they are.

Kitfox/Avid Flyer. Lots of ultralights.

Dan

In article
>,
wrote:

> Actually I'm interested also to know if any other designs besides BD
> aircraft utilize wing spars that are made of aluminum tube.
>
> So if you know of any I'd like to know what they are.

The tubular spar is not the most efficient means of carrying load -- the
I-section (or box section) is best. It all has to do with the
distibution of load-carrying material.

--
Remove _'s from email address to talk to me.

> wrote ...
> Actually I'm interested also to know if any other designs besides BD
> aircraft utilize wing spars that are made of aluminum tube.

German V-1 Buzz Bomb. Thousands of them were made and took off. Oddly,
none of them made good landings.

Rich

Actually, Germany test pilot Hanna Reich flew one to find a stability
problem and landed successfully.

wrote:
> Actually I'm interested also to know if any other designs besides BD
> aircraft utilize wing spars that are made of aluminum tube.
>
> So if you know of any I'd like to know what they are.
Grumman Tiger, Cheetah, et al.

Rip wrote:

> wrote:
>
>> Actually I'm interested also to know if any other designs besides BD
>> aircraft utilize wing spars that are made of aluminum tube.
>>
>> So if you know of any I'd like to know what they are.
>
> Grumman Tiger, Cheetah, et al.

These are outgrowth of Bede.

On Mar 17, 8:46 pm, cavelamb himself > wrote:
> Rip wrote:
> > wrote:
>
> >> Actually I'm interested also to know if any other designs besides BD
> >> aircraft utilize wing spars that are made of aluminum tube.
>
> >> So if you know of any I'd like to know what they are.
>
> > Grumman Tiger, Cheetah, et al.
>
> These are outgrowth of Bede.

Dan Denney I think used a custom center web tube extrusion, a tube
with a center web essentially.

Who used D-cell (not the battery, a shaped forward airfoil section)
spars?

On Mar 17, 7:16 pm, Bret Ludwig > wrote:

> Who used D-cell (not the battery, a shaped forward airfoil section)
> spars?

Lots of helicopter blades.

Dan

On Mar 18, 12:24 am, Ernest Christley > wrote:
> wrote:
> > Actually I'm interested also to know if any other designs besides BD
> > aircraft utilize wing spars that are made of aluminum tube.
>
> > So if you know of any I'd like to know what they are.
>
> Dyke Delta uses a welded truss made 4130 tube...each section's
> crossmembers were of a different size.
>

Ah but in terms of stress/strain, a truss is closer to
an I-beam than it is to a single tube.

Unless of course it is a very peculiar truss.

--

FF

On Mar 18, 8:12 pm, Ernest Christley > wrote:
> Fred the Red Shirt wrote:
>
>
>
> > On Mar 18, 12:24 am, Ernest Christley > wrote:
> >> wrote:
> >>> Actually I'm interested also to know if any other designs besides BD
> >>> aircraft utilize wing spars that are made of aluminum tube.
> >>> So if you know of any I'd like to know what they are.
> >> Dyke Delta uses a welded truss made 4130 tube...each section's
> >> crossmembers were of a different size.
>
> > Ah but in terms of stress/strain, a truss is closer to
> > an I-beam than it is to a single tube.
>
> > Unless of course it is a very peculiar truss.
>
> ...
>
> Nope. About as straightforward as they come.
>
> http://ernest.is-a-geek.org/Delta/Pictures/Wing1.jpg

That image appears to be 404 compliant.

Does the truss really have a circular cross-section?

If so, why?

--

FF

On Mar 18, 8:12 pm, Ernest Christley > wrote:
> Fred the Red Shirt wrote:
>
>
>
> > On Mar 18, 12:24 am, Ernest Christley > wrote:
> >> wrote:
> >>> Actually I'm interested also to know if any other designs besides BD
> >>> aircraft utilize wing spars that are made of aluminum tube.
> >>> So if you know of any I'd like to know what they are.
> >> Dyke Delta uses a welded truss made 4130 tube...each section's
> >> crossmembers were of a different size.
>
> > Ah but in terms of stress/strain, a truss is closer to
> > an I-beam than it is to a single tube.
>
> > Unless of course it is a very peculiar truss.
>
>
>
> Nope. About as straightforward as they come.
>
> http://ernest.is-a-geek.org/Delta/Pictures/Wing1.jpg

Would you believe:

http://www.ernest.isa-geek.org/Delta/Pictures/Wing1.jpg

And that wing spar looks to me to be, in terms of stress and
strain, to be truss that is a lot closer to an I-beam than to a
single tube. The top and bottom tubes are like the flanges
of an I-beam and the diagonals are like the web.

If you took out the spar, took the 'sticks' out of the ribs then
it would at least look more like a single tube. If you added
a stressed skin, then it would behave like a single tube.

And that would be peculiar.

--

FF