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#1
May 31st 21, 02:20 PM
posted to rec.aviation.soaring
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Polar for 304C?
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. 
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#2
May 31st 21, 02:32 PM
posted to rec.aviation.soaring
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Polar for 304C?
I have it, including flight test data (digital) from Dick Johnson. I dug
into this polar a lot when I had my 304C. Great ship! Will send this to you today. Britton
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#3
May 31st 21, 03:20 PM
posted to rec.aviation.soaring
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Polar for 304C?
File sent
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