On Jan 3, 10:14*am, Bill D wrote:
This is not a direct answer but still possibly useful to you.

The ASK-21 weights are lead slabs about 12mm thick each representing
2.76 Lbs of pilot weight. *This increment is too small and would be
more convenient if larger *- say, 10 - 15 Lbs. *The bolt which holds
the weights in place is very long with fine threads requiring many
turns to tighten it. *Flying with CAP cadets and seniors means weights
are frequently changed which has turned out to be a hassle.

I'm considering casting new, larger 15 Lb pilot-equivalent weights
with a captive bolt of the proper length and a large knob for easy
tightening. *These could be swapped out with minimal fuss between
flights. *A pair of these new weights would be about right for
teenagers. *Grob weights can be made the same way.

If you don't have the tools, you can rent a plumbers lead pot and make
simple molds from plaster of Paris.

Bill D

On Jan 3, 8:34*am, "kirk.stant" wrote:







Our club (St Louis Soaring Association) is looking for a set of
factory ASK-21 ballast weights, the triangular lead plates with a long
pin that screws into a fitting under the pilots knees. We recently
acquired an older ASK-21 and it didn't come with any.

Ditto a set of the factory Grob 103 ballast weights - the triangular
yellow pig iron plates that are fitted under the pilots left knee, and
come in a set of 2, I seem to recall.

If anyone knows of any lying around, please contact me.

TIA,

Kirk
66

Designing new ballast weights and attach methods for the ASK-21 could
get tricky. If the glider is in the Std Category and not experimental,
you would be changing approved design from the original aircraft. New
337s may be required and approved by local FSDO with appropriate
changes to the glider manual.

We have a Grob 103 with the big ballast weights and sometimes that is
not enough. A member melted down a lot of used auto wheel balance
weights into a flat plate about 1/4 - 3/8 inch thick and about the
size of the Grob seat. Place it in the seat, add a cushion. I forget
it's weight but it is 10-15lbs.

T