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10.10.2018
The top six on the first day of the 2018 Santa Cruz Flats Race


At 3:19:15 PM I'm 5 kilometers out from the edge of the 1 km goal
cylinder around the Francisco Grande at 2678', or 1339' AGL. I'm heading into a
5 mph head wind. I've just flown for 12.3 km from an altitude of 7167' for 10:39
minutes at a ground speed of 43 mph (therefore a true air speed of 48 mph) at an
L/D of 9:1. I'm about to enter an area of lift. I'm far in the lead overall.


5.5 km behind me is Ollie Chitty the second closest pilot at 5738' flying at 55
mph ground speed. He's got the goal cylinder made easily from his altitude and
can fly as fast as possible.




I'm the green line.


Ollie is the red line.


The question after the fact is could I have made the goal flying at best fly to
glide (into a head wind) without stopping for lift? Or could I have made it with
taking just a little bit of lift?


With 3.1 miles to goal (or 16,368') I would need 12.2:1 glider ratio to make it
there. I certainly could have slowed down from 48 mph to get a better glide
ratio and I might have made it at 12.2:1.


At 3:21:16, two minutes of thermaling later, I was at 3,036' or 1697' AGL. I
would have required only a glide radio of 9.7:1 to make it in. Ollie was still
2.5 km behind me.  But he was flying at 56 mph ground speed. I would no
doubt glide at 40 mph ground speed or less going into goal from there. I would
take 4.65 minutes to get to goal. Ollie would have taken 4.95 minutes. No doubt
he could have sped up even further if he saw me in front and down below him
conserving my altitude in order to just make it to goal.


The key overall values for the day:












































































Finish Glider L/D Average Gliding Ground Speed Altitude Start Altitude Gain (gliding)
(mph) (feet) (feet)
Ollie 1st Moyes RX 5 Pro 13.8 44 6543 1867
Davis 2nd Wills Wing T2C 144 12.6 44 6531 1214
Phil 3rd Moyes RX 3.5 13.7 45 6540 3504
Jonny 4th Moyes RX 4 Pro 14.1 40 6661 2828
Patrick Pannese 5th Wills Wing T2C 144 16.2 40 6499 3550
Kevin Carter 6th Wills Wing T2C 144 15.4 42 6142 3796












































































Number of Thermals Percent Time Thermaling Average Climb Rate Altitude Gain Thermaling Net Altitude Gain (thermaling and gliding) Time
(fpm) (feet) (feet)
Ollie 12 44 273 13743 14588 1:45:32
Davis 12 43 305 14715 15368 1:47:46
Phil 12 45 257 13668 15974 1:47:24
Jonny 10 38 296 13202 15403 1:50:37
Patrick Pannese 15 38 261 13061 14803 1:52:40
Kevin Carter 13 39 265 13553 15758 1:54:22



https://OzReport.com/1539186325
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