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#1
February 25th 14, 02:49 AM
posted to rec.aviation.soaring
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Results*of*Flight*Performance*Determination*o f*the*Lak‐17a*FES
On 2/24/2014 7:37 PM, Sean F (F2) wrote:
ill bet money that handicap is only based on weight differences. HC, please describe how this handicap was calculated? was there any aerodynamic (see study) considerations? or is this handicap based purely on 75 lbs additional mass? Current scoring rules adjust handicap 2% per 100 lbs difference from reference weight. The weight difference here is 130 lbs. Handicap difference is 1 %. If you just showed up with a heavy 17B, the adjustment would be 2.6%. Theoretical increase in glide speed for 130 lbs extra in the LAK 17B is 7%. I don't know what kind of thermal model the handicappers use to know what kind of climb degradation they assume. Also the spreadsheet version of the handicaps show it was updated in the last week. Sure, its not fair. No handicap is ever fair. But they are part of the game in sports class. 
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