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T O P I C R E V I E W
Posted - 04/05/2017 : 01:32:42 Some students and I have been doing some sail pumping on a land board - we flap a windurfing sail back and forth and reach about 3 m/s on a gym floor. Efficiency is about 20%. Used the gyros on an iphone to measure angle of attack, etc. We'd like to submit an article about it to IHPVA but as far as I can tell there is no longer any human-powered journal. Any suggestions? Thanks! Sergio Perez