[EMAIL PROTECTED] wrote:
Gidday
I've known its 200ft since forever, I guess I had good instructors, but--
What does 200ft look like glider to glider in the air?
It's three times Alice's wingspan (approximately, as she is 20.5m span)
or a bit more than 4 times a 15m wingspan. This gives us plenty of
airborne 'gauges' with which to judge our minimum clearance. A 15m
wingspan from 200ft subtends a max angle of just under 15 degrees -
which is half of 30 degrees (a reasonably familiar angle).
I think fuselage lengths might be a better guide, except that fuselage
lengths vary quite a bit and so using this might be a problem.
It should be a part of training that we get people used gauging
distances. We require students to learn to fly with no instruments so
they learn to judge height above ground in the circuit (from about
1,00ft on down) and we need to do the same in terms of safe clearance. I
admit that I have not trained students to do this until we get into
thermalling training and we should probably start this as part of basic
training.
Thinking about this, you can start it on the ground by sitting the
student in the glider and setting up another glider 65m away (pacing it
out should be reasonably accurate) and then rotating that glider through
the quadrants so the student sees the wingspan changing and starts to
get a feel for how a glider looks in a variety of attitudes at the
minimum separation distance.
--
Robert Hart [EMAIL PROTECTED]
+61 (0)438 385 533
Brisbane, Australia http://www.hart.wattle.id.au
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