Indeed you are correct that at high speed the ballasted
Glider 'bleeds' height (not energy) more slowly. That's
why we fly with ballast when we're cruising across
country, flying at higher speeds for longer periods

However if we look at that nice man Mr Johnson's test
flight of the Discus we find that carrying 183lbs of
ballast reduces the sink rate at 100kts from 3.3 m/s
to 2.24m/s.

If we pull up into a 45deg climb our velocity will
reduce at about .7g, i.e about 7m/s/s

So... if we're slowing from 100kts (50 m/s) to 40kts
(20 m/s)this will take about 30/7 seconds (i.e about
4)

Even if our ballasted glider could maintain it's sinkrate
advantage for the whole period we'd gain less than
5 metres.

At 12:36 09 September 2003, Scott Correa wrote:
Shouting is unbecoming a gentleman..................

Somehow I don't think you understood what I said.
Every test I have seen published shows the max L/D
point moving to the right (ie occuring at a higher
speed)
with an increase in wing loading. The sink rate curves
do the same thing. So again I ask, doesn't the heavier
airplane bleed energy more slowly..................

This has nothing to do with starting the engine......

Oh Yeah I also forgot to mention that although you
cannot
create energy, you can add it to the glider by flying
in air
going up faster than you are sinking thru it......................
...

Last time I looked at total energy systems, it read
airspeed
(kinetic energy) and barometric pressure (potential
energy)

Scott



'szd41a' wrote in message
.. .
YOU CANNOT CREATE ENERGY UNLESS YOU FIRE YOUR ENGINE!!!!!!!
'Scott Correa' a écrit dans le message de
...
Mark.
What about the L/D polar being skewed to the right
to the benefit of the
higher
wing loaded vehicle. At VNE the heavier a/p is cleaner
and will glide
farther.
If both a/p's pull up together, the cleaner a/p runs
out of energy last.
It
looks to me like
heavier climbs further.....

Scott


'M B' wrote in message
...
Since mass is a constant factor on both sides of
the equation, it
cancels out. Therefore there should theoretically
be negligible
difference
in the pullup altitude gained between the ballasted
and unballasted
cases.True except for two things:The ballasted glider
has more induced
dragwhile at the same airspeed as the unballasted
oneThe ballasted
glider
also has a higher stall speedSo the unballasted glider
will go
higherMark
Boyd