On Dec 14, 11:03*am, John Cochrane
wrote:
Can someone please explain the intent of this:

"Rule change to add provision for restricted water to allow ballasting
of all gliders up to the
weight of the heaviest unballasted glider, in addition to current
provision that allows no ballast.
For a no-ballast day, the rule is unchanged.
“No water contest rules” will not be changed – tail water is the only
ballast allowed."

Under what circumstances, contest type, class etc, is ballasting to
the weight of the heaviest unballasted glider to be allowed?

Why does the new rule apply to weight rather than wing loading?

thanks

Andy

This addresses a situation such as Cesar Creek, where full ballast
could not be used because of a soft field. However, some pilots had a
lot of iron (motors) in the back, giving them a perceived wingloading
advantage. So now, everyone can ballast to the same weight as the
motorgliders. If it's safe to tow the motorgliders, it's safe to tow
everyone at their weight. Newcastle or Parowan might want to do the
same thing.

Why weight rather than wingloading? Simplicity. Imagine the chaos if
we have to find the highest wingloading mortorglider, then everyone
else has to figure out how much ballast puts them at the same
wingloading, then the scales guy has to verify they did the
computation right. Weight is much easier, and we felt the difference
in wing area of modern gliders is small enough that the resultant
advantage to smaller wing area gliders is not worth worrying about.
(And 3/5 of the rules committee flies Schleicher gliders... No, just
kidding)

The conventional no-ballast rules are still an option. For example, if
no water is available, or if there is no time to give everyone a fair
chance to water, weigh, and grid, then the CD can call conventional no-
ballast rules.

Fairness is also a consideration. If it's a clearly marginal 1 knot
day and there are other reasons for wanting to limit water (Mifflin, a
pain to get the fire trucks out) that argues for no-ballast rules. If
it's booming but takeoff or runway considerations are limiting water,
that argues for the water-to-same-gross rules.

Bottom line, now CDs have two options for limiting water: 1) They can
say "everyone can water up to XXX gross weight only" and 2)
conventional no-water rules. Which to use depends on the circumstance,
safety, fairness, etc. etc.

I can see we're in for some interesting pilot meetings....

John Cochrane

No water rule is US new wheel invention.
If the airport is not safe(soft field ect.) , we should not fly or
wait.
If there is no water in the field we can bring our own water (Mifflin)
If somebody didn't put his glider in the morning together and fill it
with water(it was raining) , it is his problem.
If was raining after morning briefing we should have no tape day.
Same if somebody forgot to charge his battery.
Can we make no battery day ?Maybe was no power at the airport last
night.Some time ago I did check ride in Estrela and I got really
****ed (they had no airbrake rules),Can I use slip, NO was the
respond.Took me 3 trays to stop+/- 50ft from my waiting son.
Or maybe some of us are too old for all this hassle ?
OK, we have a team RC) ,,,, they have to produce,,,,, more and more
rules.
Water rule is aimed against Diana 2 and future Duckhawk fliers.
Who is afraid ?
Ryszard
Before last Grand Prix in Chile there was protest against Diana 2
fliers having bigger wing loading.Both Diana fliers had to reduce
water ballast, but it did not help.