On Apr 2, 1:34*pm, 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 ?

Thanks,

Jim

General speeds I use fwiw
Survival-about 55 kt.
Moderate lift- to say 300 ft/min- about 70 kt
Above 300 ft/min, gradually move range up to about 80kt.
Polar ain't that great, so it almost never pays to put speed range
above about 80, at least in the East with usual
working band.
Plan on max L/D of about 32.
The good news is that where you will land is in sight of old eyes.
The bad news is the same.
The glide amoeba on Clearnav is quite useful in the '21 where "what
can I get to or over" is a bigger deal
than the higher performance ships we usually fly.
You will have fun taking friends on contest flights. I'm doing 2
contests this year with riders.
UH/K21