Sgs 1-35 Polars for SeeYou Mobile

I like Mike Borgelt's approach. Collect the data for your glider during a couple test flight and enter the data into his free software to determine the quadratic equation A, B, and C values.
http://www.borgeltinstruments.com/so...ies.html#Polar



"Mike" wrote in message ...
Paul,

Actually I entered the data in your conversion spreadsheet as a
Cambridge Polar File and then posted the resulting See You data
points.

Using the best L/D and speed and the 2 meter sink rate at speed, when
I checked the resulting generated polar, it was pretty close to the
Johnson measured polar. Close enough that I would fly with it.

Best L/D was actually measured at 36.8 @ 92 kph and the 2 meter sink
speed @ 148kph. Test weight was 315.2 kg.





On Apr 1, 6:13 am, "Paul Remde" wrote:
Hi Mike,

Those numbers look like they may be correct. Hopefully, when you enter
those numbers into SeeYou Mobile, it displays the correct glide ratio and
other data.

If you send me the 3 airspeed and sink rate pairs (with the lowest speed one
at the best L/D speed). I would be glad to put them onto my Polars web
site. I will also need to know the wing loading at which the numbers were
obtained.

Best Regards,

Paul Remde

"Mike" wrote in message

...
On Mar 31, 9:50 pm, Randy wrote:

Mike,
I do not understand what to enter on the SeeYou Mobile
Polar setting page. There are six available boxes.
Name Sgs 1-35
Min Load - 6.38
Stall Speed - 43 mph
a -
b -
c -

I do not know what goes in a, b, c boxes.
Even when I look at the polars for my own
glider, I do not understand what the numbers
mean.

If I entered the data correctly into Paul's spreadsheet, and the
conversion from a cambridge file to a See you file is correct, the
data supplied by Dick Johnson's actual test polar at his weight is ...

a= 2.1
b= -4.4
c= 3.2