ASK-21 fuselage dolly

I've volunteered to repair a non-functional ASK-21 fuselage dolly and
to do it I need photos of one showing the original condition. Please,
if you have one in working order, take a few shots of the steel frame
works and email them to me.

This one has a scissor jack welded into place between two rigid frame
members(!) Its only possible function is to bend the frame which IS
bent. The unknown bozo welder damaged the fiberglass with heat but
covered his tracks with duct tape painted red to match original
paint. (Take home: don't let bozo's work on your glider stuff.)

For those unfamiliar, the ASK-21 is a fixed gear trainer with a nose
wheel. The fuselage, in its dolly, is intended to be rolled off the
trailer tail ramp onto the ground. When the glider is assembled, the
dolly mechanism has to lower the saddle so it can be rolled forward
passing under the nose wheel.

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Thanks in advance.

On Fri, 30 Jul 2010 09:22:04 -0700 (PDT), bildan
wrote:

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Our tail fuselage dolly has a cut-out on the bottom which is a little
wider than the nose wheel and allows the latter to pass.
As long as the bottom of the fuselage is polished it is easy to push
the whole glider onto the dolly.


Cheers
Andreas
Bye
Andreas

On Jul 30, 11:16*am, Andreas Maurer wrote:
On Fri, 30 Jul 2010 09:22:04 -0700 (PDT), bildan
wrote:

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Our tail fuselage dolly has a cut-out on the bottom which is a little
wider than the nose wheel and allows the latter to pass.
As long as the bottom of the fuselage is polished it is easy to push
the whole glider onto the dolly.

Cheers
Andreas
Bye
Andreas

Thanks, Andreas, but the tail dolly plays no part in our problem - the
glider was on its tail wheel. I have to restore the fuselage dolly to
its original configuration but there seems to be missing parts which
is why I need photos.

On Jul 30, 1:36*pm, bildan wrote:
On Jul 30, 11:16*am, Andreas Maurer wrote:





On Fri, 30 Jul 2010 09:22:04 -0700 (PDT), bildan
wrote:

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Our tail fuselage dolly has a cut-out on the bottom which is a little
wider than the nose wheel and allows the latter to pass.
As long as the bottom of the fuselage is polished it is easy to push
the whole glider onto the dolly.

Cheers
Andreas
Bye
Andreas

Thanks, Andreas, but the tail dolly plays no part in our problem - the
glider was on its tail wheel. *I have to restore the fuselage dolly to
its original configuration but there seems to be missing parts which
is why I need photos.- Hide quoted text -

- Show quoted text -

Does you dolly rock back as it lifts, or go straight up?
Have 1 photo of "rock back" style
UH

On Jul 30, 11:58*am, wrote:
On Jul 30, 1:36*pm, bildan wrote:





On Jul 30, 11:16*am, Andreas Maurer wrote:

On Fri, 30 Jul 2010 09:22:04 -0700 (PDT), bildan
wrote:

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Our tail fuselage dolly has a cut-out on the bottom which is a little
wider than the nose wheel and allows the latter to pass.
As long as the bottom of the fuselage is polished it is easy to push
the whole glider onto the dolly.

Cheers
Andreas
Bye
Andreas

Thanks, Andreas, but the tail dolly plays no part in our problem - the
glider was on its tail wheel. *I have to restore the fuselage dolly to
its original configuration but there seems to be missing parts which
is why I need photos.- Hide quoted text -

- Show quoted text -

Does you dolly rock back as it lifts, or go straight up?
Have 1 photo of "rock back" style
UH

This one seems to rock but it must have had an up-and-down motion
originally otherwise there's no way to get the fuselage off of it
without the pile of lumber and lots of muscle.

On Fri, 30 Jul 2010 10:36:28 -0700 (PDT), bildan
wrote:

On Jul 30, 11:16*am, Andreas Maurer wrote:
On Fri, 30 Jul 2010 09:22:04 -0700 (PDT), bildan
wrote:

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Our tail fuselage dolly has a cut-out on the bottom which is a little
wider than the nose wheel and allows the latter to pass.
As long as the bottom of the fuselage is polished it is easy to push
the whole glider onto the dolly.

Cheers
Andreas
Bye
Andreas

Thanks, Andreas, but the tail dolly plays no part in our problem - the
glider was on its tail wheel. I have to restore the fuselage dolly to
its original configuration but there seems to be missing parts which
is why I need photos.

I was talking about the fuselage dolly.
Could you post a photo of your somewhere? I'd be interested what it
looks like - it might be possible that we have a similar design for
our SF-34.

On Jul 30, 5:36*pm, Andreas Maurer wrote:
On Fri, 30 Jul 2010 10:36:28 -0700 (PDT), bildan
wrote:





On Jul 30, 11:16*am, Andreas Maurer wrote:
On Fri, 30 Jul 2010 09:22:04 -0700 (PDT), bildan
wrote:

To get the dolly from under the fuselage, we had to stack some boards
behind the main wheel and round up enough muscle to push the glider's
main wheel up onto them.

Our tail fuselage dolly has a cut-out on the bottom which is a little
wider than the nose wheel and allows the latter to pass.
As long as the bottom of the fuselage is polished it is easy to push
the whole glider onto the dolly.

Cheers
Andreas
Bye
Andreas

Thanks, Andreas, but the tail dolly plays no part in our problem - the
glider was on its tail wheel. *I have to restore the fuselage dolly to
its original configuration but there seems to be missing parts which
is why I need photos.

I was talking about the fuselage dolly.
Could you post a photo of your somewhere? I'd be interested what it
looks like - it might be possible that we have a similar design for
our SF-34.

Thanks everybody. I think I have it figured out. The missing parts
are up and down stops which were apparently removed to make room for
the scissor jack the nameless bozo welded in. I think I've located a
"screw jack" with exactly the right dimensions - unfortunately only
available on-line. (Google "screw jack" + "Home Depot")

BTW, you guys with troublesome hydraulic bottle jacks in your trailer
ramps might take a look at screw jacks. They are very similar in size
and shape and there's nothing in them to leak.

Our K-21 dolly raises/lowers (about 4-6 inches) through an overcentre
parallelogram linkage which is operated by rotating a telescopic half-
inch drive socket handle through about 120 degrees.

No jack - screw or hydraulic. Works fine and I believe it is the
standard works dolly.

Check the side and see if there's a casting with a square half inch
drive socket hole. It may be that your jack is an "undocumented
feature".

If that's it I can get you pictures next Friday - it's 250 km away
now.

GC

On Aug 1, 8:33*am, Graemec wrote:
Our K-21 dolly raises/lowers (about 4-6 inches) through an overcentre
parallelogram linkage which is operated by rotating a telescopic half-
inch drive socket handle through about 120 degrees.

No jack - screw or hydraulic. *Works fine and I believe it is the
standard works dolly.

Check the side and see if there's a casting with a square half inch
drive socket hole. *It may be that your jack is an "undocumented
feature".

If that's it I can get you pictures next Friday - it's 250 km away
now.

GC

Thanks for the offer but we have one like yours in another ASK-21
trailer. I like it too. Apparently the fuselage dolly evolved over
the years.

The dolly needing repair is completely different. It uses a nearly
horizontal jack roughly in the middle of the base support frame to
rotate a sub-frame through ~90 degrees to raise and lower the fuselage
saddle.

Overall, I think I like the concept of a jackable fuselage dolly which
rolls completely off the tail ramp better than the classic tail ramp
with an integrated jack. If the fuselage rolls completely off the
ramp, the ramp can be removed to get it out of the way. While I like
the concept, the execution needs improvement.

If you can roll the fuselage ten feet or so away from the tailgate,
there's more room to maneuver the wings with a one-man wing rigger.
The wing roots can be lifted off their dollies and walked across in
front of the nose then pushed toward the wing tip until the root
clears the nose. If you do it right, the wing swings into perfect
alignment without walking the roots out past the tail.