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01.10.2018
Final glide, last day SCFR


Here are the tracks for them:



A error-prone version of the track logs can be found here:
https://airtribune.com/santa-cruz-flats-race-mark-knight-memorial-2018/blog__day_6.
I had to obtain the Flymaster tracker track logs from the scorekeeper who
downloaded them from the Flymaster server. The tracklogs on the Airtribune
server were downloaded automatically to that server in "real" time from the
Flymaster server but we found them to have errors. Those error may not have
affected our analysis but we went to the better IGC files which matched the IGC
files from the pilots' flight instruments (We just checked Robin's).


Here are their starts:





These are their altitudes during their final glide:



Here are their finishes:




These are the altitudes and times at goal (Tyler is off by one second compared
to the official results).


Zac Majors (Wills Wing T2C): 792 red line

Tyler Borradaile (Moyes RX 3.5 PRO): 755 green line

Robin Hamilton (Aeros Combat 13): 772 blue line

Dustin Martin (Wills Wing T2C): 784 purple line


Here are the stats for their final glides starting at the time that they left
the thermal as determined by looking at their track logs, in the order that they
left the thermal:


Zac's (Wills Wing T2C) final glide:



Tyler's (Moyes RX 3.5 PRO) final glide:



Robin's (Aeros Combat 13) final glide:



Dustin's (Wills Wing T2C) final glide:



Final Results:
https://airtribune.com/santa-cruz-flats-race-mark-knight-memorial-2018/results/task3767/day/open-class


Zac 1:43:20

Robin 1:43:38

Tyler 1:43:49

Dustin 1:44:46


Zac started first five seconds ahead of Tyler. Robin was fourteen seconds behind
Zac to start. Dustin was eighteen seconds behind.


Zac and Tyler started at the same altitude. Robin started 100 feet higher and
Dustin 125 feet higher.


Zac averaged 45 mph (ground speed), Tyler 44, Robin 45, and Dustin 42 mph. I use
ground speed because the trackers calculate air speed, they don't measure it.


Zac arrived at the edge of the 1.5 km goal cylinder at 1,900', Robin about
2,700', Tyler 2,500', and Dustin at a little over 2,500'. The ground elevation
is about 1,300'.


Zac got an 9.1:1 glide ratio, Robin 10.3, Tyler 10.1, Dustin 10.0.


At about one kilometer before the edge of the goal cylinder Zac was going 68 mph
(GS), Robin 58 mph, Tyler 59 mph, Dustin 52 mph.


From 3 kilometers out Zac averaged 60 mph (GS) with an L/D of 6.9, Robin
averaged 59 mph with an L/D of 8.5, Tyler 53 mph with an L/D of 10.7, and Dustin
48 mph with an L/D of 13.8.


Here's how the pilots line up at 15:41:41 about 2.7 km to 3.6 km out:




From there Zac flew 2.7 km in 1:39 minutes at 62 mph (GS) with an L/D of 6.4
(this is all into a head wind calculated to be 5 mph at these lower altitude).
He found no rising air.


Robin flew 3.1 km in 1:57 minutes at 59 mph (GS) with an L/D of 8.6. He found no
rising air.


Tyler flew 3.9 km in 2:09 minutes at 53 mph (GS) with an L/D of 10.3. Twenty two
seconds were in rising air.


Dustin flew 3.6 km in 3:05 minutes at 44 mph (GS) with an L/D of 18.5. Forty two
seconds were in rising air.


Obviously there was rising air earlier for Robin as well as for Dustin and
Tyler. This arising air made a significant difference in the altitude that
Robin, Tyler, and Dustin reached goal at.



https://OzReport.com/1538408167
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