Does anybody have a polar for the HPH 304C - the model with 15m
unflapped wings? Either a graph or just some numbers will do. The
"Glasflugel 304" polar built into XCsoar (span not specified) seems
wrong (STF too high, much higher than, e.g., LS4). The "304CZ" built-in
polar also calls for a high STF, but not quite as high. Is the "H-304"
line in Max Kellerman's polars spreadsheet - or the more mechanized
polar10.xls - appropriate? It seems to be (at wing loading 35.8) very
similar to the LS4 (at 34.4) up to about 85 knots. Above that speed the
304 does better, according to that spreadsheet.