Fastest way home?

On Friday, June 21, 2013 3:12:13 PM UTC-5, wrote:
The way you manage it is with the McCready dial on your SN-10 and the turnpoint position (for a TAT), or turnpoint selection (for a MAT). You set the McCready to the setting that corresponds to the task speed achieved so far and adjust the final glide distance to have the arrival height you want. If you are in a cloud street, keep flying as long as you can maintain that final glide speed and are above your minimum arrival height (or think you can reach it without slowing down).

Interesting idea, I'll have to try it next time. So far, I just use the recommended speed for the MC to try to fly a good ballpark speed (I hate the speed director and try to avoid fancy push-pulls), then look at the acheived XC speed when deciding on final glide tactics - it's usually pretty easy to figure out if it's going to get faster or slower...

Just for grins, I did a quick comparison of my flights during R9 at Moriarty, comparing them to BB's chart. My 6 was at 10psf every flight, and without draglets I figure it's pretty close to a 27 ;^).

Day 1 I got spooked by a big storm over the field so took way too much time getting home and the numbers show it, but the remaining 3 days are interesting:

Day 1 Avg climb 3.8 knots, XC speed 59 mph, BBs MC 4 (wet) XC speed s/b 68 mph.
Day 2 Avg climb 5.3 knots, XC speed 75 mph, BBs MC 5 (wet) XC speed s/b 74 mph.
Day 3 Avg climb 5.6 knots, XC speed 80 mph, BBs MC 6 (wet) XC speed s/b 81 mph.
Day 4 Avg climb 5.2 knots, XC speed 73 mph, BBs MC 5 (wet) XC speed s/b 74 mph.

Pretty close match. Looking at my actual cruise speeds, they are in the ballpark of the speeds suggested by the chart, with the average a bit lower (working lift bands) but a lot of time higher.

Darned it that fancy math stuff kinda works!

By the way, the skies south of Chicago looked AWESOME yesterday! Unfortunately, I was looking at them from my car...

Cheers,
66


66

By the way, the skies south of Chicago looked AWESOME yesterday! Unfortunately, I was looking at them from my car...



Cheers,

66


Feel better. I was out at the airport getting the glider ready and doing some instructing. Big mushburger clouds with not much in them. A very interesting line formation and nw curl over light south flow... but no big excitement in the air.

John Cochrane BB