The Idaflieg/DLR measurement data is available only after 2 years (except
when a manufacturer agrees to an earlier date) because manufacturer do
actually trust these polars - and a bad polar for a particular glider could
make the company go belly up...

The Idaflieg measurement setup is much more sophisticated than any private
individual could afford, and I would always Idaflieg data if I had a choice.

BTW, my Idaflieg polar for the ASW20 does show individual flap settings...

--
Bert Willing

ASW20 "TW"


"John Galloway" a écrit dans le message
de news: ...
At 10:30 02 May 2005, Chris Rowland wrote:
On 28 Apr 2005 20:19:15 GMT, John Galloway
wrote:
No polars are ever going to be totally true but Dick
Johnson has a record of picking up quite few valid
performance issues over the years. DFVLR polars are
surprisingly smooth, surprisingly better at higher
speeds than Johnson's, don't show individual flap polars,
and are available only by individual purchase 2 years
after measurement or in manufacturers manuals. I always
use Dick Johnson's data (if available) for glide computers.

John Galloway