carbon fiber wing wheel dolly

On Jul 27, 7:42*pm, Dave Nadler wrote:
On Jul 26, 3:04*am, gonz wrote:

nice design for this wing wheel dolly
carbon fiber texalium
shock absorber
easy to use
watch the video * * * *http://www.youtube.com/watch?v=djXBxx9ys_Y

Why would you use a big ugly coil spring,
when you can easily make the arm springy ?
Needs no loose parts and easier attach,
just because a girl can do it doesn't mean
a glider pilot can....

See ya, Dave

ya know, that is a pretty cool looking contraption, but from a
homebuilder point of view, making it out of aluminum tubing, extrusion
and flat sheet is much easier and less labor intensive. might be a bit
heavier, but not much. of course the wing cuff would be composite!

On Jul 27, 10:14*pm, Brad wrote:
On Jul 27, 7:42*pm, Dave Nadler wrote:

On Jul 26, 3:04*am, gonz wrote:

nice design for this wing wheel dolly
carbon fiber texalium
shock absorber
easy to use
watch the video * * * *http://www.youtube.com/watch?v=djXBxx9ys_Y

Why would you use a big ugly coil spring,
when you can easily make the arm springy ?
Needs no loose parts and easier attach,
just because a girl can do it doesn't mean
a glider pilot can....

See ya, Dave

ya know, that is a pretty cool looking contraption, but from a
homebuilder point of view, making it out of aluminum tubing, extrusion
and flat sheet is much easier and less labor intensive. might be a bit
heavier, but not much. of course the wing cuff would be composite!

Looks sleek but you need three hands to put it on the wing. Also, not
that you'd do it all that often but I would not be inclined to tow the
glider nose first with that long trailing arm. It would be
directionally unstable like a weather vane pointing downwind.

9B

"Andy" wrote

Also, not
that you'd do it all that often but I would not be inclined to tow the
glider nose first with that long trailing arm. It would be
directionally unstable like a weather vane pointing downwind.

I wondered about that, too. I wonder if she put it on backwards?
--
Jim in NC

On Jul 28, 6:32*am, "Morgans" wrote:
"Andy" wrote

*Also, not
that you'd do it all that often but I would not be inclined to tow the
glider nose first with that long trailing arm. It would be
directionally unstable like a weather vane pointing downwind.

*I wondered about that, too. *I wonder if she put it on backwards?
--
Jim in NC

she wasn't blonde...................just sayin'

Brad

Look again, she put it on the correct way. Maybe towing tail first is
not how Y'all do it?

On Jul 27, 10:14*pm, Brad wrote:

ya know, that is a pretty cool looking contraption, but from a
homebuilder point of view, making it out of aluminum tubing, extrusion
and flat sheet is much easier and less labor intensive. might be a bit
heavier, but not much. of course the wing cuff would be composite!

Actually, the carbon has some pretty compelling advantages. It is a
lot lighter, so that it is easier to stow, carry, and attach.

I think that carbon sleeve over EPS or EPP rod would indeed do the
trick for the arm. If you were serious about it, you'd have a high-
pressure female mold, and mold the part by inflating a plastic bladder
inside the sleeve material, but the male molded part would be almost
as stiff and easier and cheaper to make for just one or two.

As Dave points out, it can be made springier, so that the goofy steel
spring and shock absorber isn't required. The way it grabs the axle on
only one side of the wheel is a neat trick, but the greater bending
loads makes the axle heavier than if the arm were forked.

As Andy points out, the leading arm might be divergent, but I don't
think that it is actually unstable except at very high speeds and
loads.

Thanks, Bob K.

On Jul 28, 8:37*am, Bob Kuykendall wrote:
On Jul 27, 10:14*pm, Brad wrote:

ya know, that is a pretty cool looking contraption, but from a
homebuilder point of view, making it out of aluminum tubing, extrusion
and flat sheet is much easier and less labor intensive. might be a bit
heavier, but not much. of course the wing cuff would be composite!

Actually, the carbon has some pretty compelling advantages. It is a
lot lighter, so that it is easier to stow, carry, and attach.

I think that carbon sleeve over EPS or EPP rod would indeed do the
trick for the arm. If you were serious about it, you'd have a high-
pressure female mold, and mold the part by inflating a plastic bladder
inside the sleeve material, but the male molded part would be almost
as stiff and easier and cheaper to make for just one or two.

As Dave points out, it can be made springier, so that the goofy steel
spring and shock absorber isn't required. The way it grabs the axle on
only one side of the wheel is a neat trick, but the greater bending
loads makes the axle heavier than if the arm were forked.

As Andy points out, the leading arm might be divergent, but I don't
think that it is actually unstable except at very high speeds and
loads.

Thanks, Bob K.

I like the whole concept except the fact I then will need to add
weight to the wingwheel or tip on that side to prevent the other wing
from hitting the ground. Similar to when you tow out with water.
Sometimes lighter is not better.

On Jul 28, 8:42*am, Tim Taylor wrote:
On Jul 28, 8:37*am, Bob Kuykendall wrote:





On Jul 27, 10:14*pm, Brad wrote:

ya know, that is a pretty cool looking contraption, but from a
homebuilder point of view, making it out of aluminum tubing, extrusion
and flat sheet is much easier and less labor intensive. might be a bit
heavier, but not much. of course the wing cuff would be composite!

Actually, the carbon has some pretty compelling advantages. It is a
lot lighter, so that it is easier to stow, carry, and attach.

I think that carbon sleeve over EPS or EPP rod would indeed do the
trick for the arm. If you were serious about it, you'd have a high-
pressure female mold, and mold the part by inflating a plastic bladder
inside the sleeve material, but the male molded part would be almost
as stiff and easier and cheaper to make for just one or two.

As Dave points out, it can be made springier, so that the goofy steel
spring and shock absorber isn't required. The way it grabs the axle on
only one side of the wheel is a neat trick, but the greater bending
loads makes the axle heavier than if the arm were forked.

As Andy points out, the leading arm might be divergent, but I don't
think that it is actually unstable except at very high speeds and
loads.

Thanks, Bob K.

I like the whole concept except the fact I then will need to add
weight to the wingwheel or tip on that side to prevent the other wing
from hitting the ground. *Similar to when you tow out with water.
Sometimes lighter is not better.

Take something you're going to carry out with the glider anyway - like
a parachute - and make a way to securely lay it atop the wing glove.
Make it short enough the glider tilts toward the wheel.

On Jul 28, 7:37*am, Bob Kuykendall wrote:

I think that carbon sleeve over EPS or EPP rod would indeed do the
trick for the arm. If you were serious about it, you'd have a high-
pressure female mold, and mold the part by inflating a plastic bladder
inside the sleeve material, but the male molded part would be almost
as stiff and easier and cheaper to make for just one or two.

All far too complicated!

When I built my wing wheel I prototyped the legs with 3/4 inch
schedule 40 pvc pipe. The idea was to get the geometry right then
make to final legs from aluminium square tube. It turned out the sched
40 pvc was perfect for the job. It is dimensionally stable, has just
the right amount of spring, and does no damage anything it bangs or
rubs against. The protype legs have lasted 8 years. They will be
changed this winter for a design that allows height adjustment but
I'll use the same material.

Andy (GY)

On Jul 28, 10:35*am, Andy wrote:
On Jul 28, 7:37*am, Bob Kuykendall wrote:

I think that carbon sleeve over EPS or EPP rod would indeed do the
trick for the arm. If you were serious about it, you'd have a high-
pressure female mold, and mold the part by inflating a plastic bladder
inside the sleeve material, but the male molded part would be almost
as stiff and easier and cheaper to make for just one or two.

All far too complicated!

When I built my wing wheel I prototyped the legs with 3/4 inch
schedule 40 pvc pipe. *The idea was to get the geometry right then
make to final legs from aluminium square tube. It turned out the sched
40 pvc was perfect for the job. *It is dimensionally stable, has just
the right amount of spring, and does no damage anything it bangs or
rubs against. *The protype legs have lasted 8 years. *They will be
changed this winter for a design that allows height adjustment but
I'll use the same material.

Andy (GY)

How about pictures Andy, Any place you could post them for others to
view?