At 22:00 12 January 2012, Dave Nadler wrote:
On Thursday, January 12, 2012 12:48:09 PM UTC-5, Cliff Hilty wrote:
I did this with a stop watch and 5 gallon buckets under
the dump valves and had the "Weigher" tell me when I got to gross,
stop
and
record both time and gallons dumped, then continued to 9 lbs per sq
ft,
stop and record, then dumped the rest. This gave me a very accurate
amounts
in both gallons and time (seconds to dump for any wing loading I may
want
to fly with.

Um, no, dump speed is limited by vent (in flight and on ground).
Lower pressure on vent in flight slower dump time in flight...
Also, for that glider, enlarging vent holes makes it safer
if you fall off a ridge and need to dump fast...


Dave you missed my point any glider that you fly it will work for on the

ground to get to your desired take off weight. No water meters ect for
calcs also I use a 3 gallon bucket and time the fill rate to decide how
much to put in each wing to get to what I want. 9 gallons per wing works
for me and its easy and quick to do once you have the initial weight snd
balance.