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I wish I'd never got into this...
The original question stated a glider doing 100kts
with/without 100kgs of ballast. Ignoring the stalling speed for the moment, Does anyone out there think the pull-up takes more than 4 or 5 seconds? Does anyone out there think that the sink rate of the unballasted glider at 100kts is more than 1m/s greater than the ballasted one? Finally does anyone out there think that the difference in height gain for the ballasted glider is more than 4 or 5 metres? If you think the answer to the third is Yes but the answer to the first & second is No, please let me know why!! And if your answer to 'Why ?' is ''cos I've done pull-ups higher with ballast' I want to know exact entry speed, exact exit speed, climb angle, exact amount of ballast, and exact heights gained with & without ballast (preferably backed up with a logger trace!). (And NO comparing two different gliders, just 'cos they have the same wing section & are doing rolling manoeuvres during the pull-up doesn't count) :-) Kevin |
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