On Feb 15, 10:15*am, Ronald Locke Ronald.Locke.
wrote:
Can anyone help with references for glide ratios for basic training
gliders, Blanik, K13, Puchatek etc, with full brake or half brake
deployed?

The internet is not very helpful for finding this information. A
reference of 29 to 1 for a K6 -no brake and 7.1 full brake is about all
I can find.

Given a Blanik at, say 28 to 1 no brake deployed, would around 8 to 1
full brake and say around 15 to one half brake sound about right?

I believe there is a legal requirement to be no flatter than 7:1 with
full brake at typical approach speed.

At one time there was a requirement to be able to do a 45º descent
without exceeding Vne (or was it rough air?)

The Blanik is much older than the requirement, but would easily meet
it. I recall when I was a beginning pilot one instructor had me do a
near vertical descent in the Blanik from around 8000 ft. If I recall
correctly, it topped out at about 115 knots (well below Vne). That's a
0:1 glide angle.

There's also the question of flaps. We practiced landing approaches
with full brake and full flap at maximum flap speed (60 knots IIRC).
They were really quite steep, perhaps around 2:1 (30º) or even more.
When you leveled out the speed washed off quickly so it was actually
quite practical.