At 10:20 25 February 2014, David Salmon wrote:
At 02:58 24 February 2014, Martin Gregorie wrote:
On Sun, 23 Feb 2014 15:49:16 -0800, ES wrote:

Are there any other tools available that can take a set of sink rates
(hopefully more than 3) and produce some decent numbers?

Does your flight computer accept polars in the Winpilot format?

If so, are the numbers for an SZD-56-2 Diana-2 of any use, either
directly or for use as a starting point? If so the SZD-56-2 polar is
included on the LK8000 polars database.

Wishing the flight computers would just start with lookup tables,

Well, both XCsoar and LK8000 do just that and both load polars from
Winpilot format polar files, - but neither currently has a polar for the

SZD-56-1 Diana-1.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |

To add to what Martin says, LK8000 (don't know about XCS), has the
facility
to add the wing area field to the polar file. You can then set your wing
loading, for actual flight, and the polar will be adjusted automatically.
Dave



Use the excellent polar spreadsheets buy Paul Remde he
http://www.cumulus-soaring.com/soarmn/soaring_files.htm
Tables are not used by LK8000, and the quadratic approximations are not a
great way to do it, look-up would be much better!