On Apr 3, 5:34*am, 77 wrote:
Am going to fly a club K21 in the upcoming contest at CCSC and have
been trying to find some basic speed to fly data.

What I have so far is Schleicher says( in an on-line brochure) that
the L/D flown two up is 34 at 90 KMH...so I interpret that to be about
49 Kts.

They also say that the stall speed flown two up is 35 Kts

I find no mention anyplace of Minimum Sink Speed. From the polar in
the brochure it looks to be about 42 to 44Kts.

I have a some cross country time in the K21 and these speeds look
reasonable to me but I'm not sure.

Anyone have any suggestions regarding speeds to fly the ASK21 ?

From the above data on a weak day I might *fly 55 kts or so. On a good
day with *cu's maybe 60 or even 65 kts. Any rules of thumb you would
like to share ?

That sounds close enough. Those are about the speeds I fly in a PW5,
which is very similar performance.

Err on the slower side unless you're having trouble staying below
cloudbase -- in which case remember to fly fast between the streets
and slow when under them, not vice versa!

If you can fly around the course at even 50 - 55 knots with no
circling then you'll probably win the day.