I had a 27 type system in my first glider and I agree it does not work well.
In my second glider I went straight down with a larger guide tube
and a smaller one to slide in and out, which worked much better.
In my third iteration, which happens to be an ASW24, I use the same
approach but with improvements.

First a guide tube, having an even bent starting flush at the seat pan
and 90 deg. to the contour of the seat pan.
The hole is at the 4 o'clock position at the stick opening of the seat pan.
It clears the thigh even when the knees are tight together against the
instrument column.
The radius of the guide tube is such that the telescoping tube exist the
bottom of the belly at about a 20-25 deg. angle. The inner tube
(telescoping) continues to make a curve free of the guide tube and points
almost back wards when the glider is not flying.
When flying I am sure it will point back. The tube, in that position on the
ground,
is about 5" from belly skin. When retracted the belly is nice and flush.
The system works well with a bulb type funnel and catheter.
After a five day contest there will be some residue but no intrusion into
the
gear well. There is no streaking hence no fluid running along the skin.
From the catheter I hook directly to the quick disconnect from there a short
latex tube for max flex without kinking, and then onto the stiffer tube of
about 10"
It all can be retracted if desired.
Regards
Udo



wrote in message
ups.com...
John,

Sorry to say the factory installation does not work for the following
reasons:
1. The tube comes through the seat pan under the right thigh not in
the center. This causes the tube to be crushed so that flow is
restricted.
2. The tube running down the right side then into the gear well and
onto the aft end of the right gear door has two uphill points ( or high
points ). The Germans must have great nossel pressure. The
corresponding low points leave liquid in the tube with air in between.
The suction created by the tube at the gear door never removes all the
fluid. This requires a pretty good liquid pressure to move the low
point liquid and air out. This can cause a "blow off" of the condom
and if one uses a funnel, it has to be held up close to the top of the
pannel.
Tom
Idaho
BB wrote:
The factory installs a pee tube by drilling a hole in the seat pan
just
behind the stick. They route the tube to the right aft landing gear
door. Find a 27 with the factory option installed and you'll see one
system that works for sure.

John Cochrane