Search found 7 matches

by R Glencross
Fri Mar 20, 2020 1:36 pm
Forum: Technical Papers for review and comment
Topic: Ultimate sailing for oldies part 7
Replies: 0
Views: 22823

Ultimate sailing for oldies part 7

Ultimate sailing for oldies VII Vertical sail for progress across water In order for the wind powered hapa-driven ekranoplane to fly it first needs a vertical component of area in the wing, I.e. a sail equivalent. Is the vertical projection of the anhedral (windward side only) sufficient to drive th...
by R Glencross
Sun Mar 08, 2020 6:56 pm
Forum: Technical Papers for review and comment
Topic: Ultimate sailing for oldies part 6
Replies: 0
Views: 22819

Ultimate sailing for oldies part 6

Ultimate sailing for oldies Part VI Diamond planform wing The double size hangglider layout is rejected because of the weight of the rigid members (100ft). So my attention turned to my paraglider which weighs only 10lbs (dry). This fails due to my inability to shorten the lines to get the canopy int...
by R Glencross
Thu Jan 23, 2020 4:32 pm
Forum: Technical Papers for review and comment
Topic: Ultimate Sailing for Oldies
Replies: 5
Views: 17362

Ultimate Sailing for Oldies

Introduction Now that Ultimate Sailing has been achieved by the French, using hapas inspired by Didier Costes and designed and manufactured by Stephane Rousson, it is opportune to upgrade Professor J. G. Hagedoorn’s booklet “Ultimate Sailing, introducing the hapa”. I propose to move from Hagedoorn’...
by R Glencross
Thu Jan 23, 2020 9:44 am
Forum: Technical Papers for review and comment
Topic: Ultimate Sailing for Oldies
Replies: 5
Views: 17362

ultimate sailing for oldies part 5

Ultimate Sailing for Oldies part V At the AYRS all-day seminars in November 2017 and January 2018 various comments, not to say objections, were raised re windpowered flight for Oldies. In true New Scientist style I will now correct the errors which have occurred in previous editions of Ultimate Sail...
by R Glencross
Thu Jan 23, 2020 9:43 am
Forum: Technical Papers for review and comment
Topic: Ultimate Sailing for Oldies
Replies: 5
Views: 17362

ultimate sailing for oldies part 4

Ultimate Sailing for Oldies part IV In part III I assumed that the hanglider- boat had an all-up weight of 180 lbs, that the hanglider had a lift co-efficient of two, the 18 sq. ft. hapa had a lift/drag ratio of two, the hapa had a lift co-efficient of unity and, the hang-glider had a lift/drag rati...
by R Glencross
Thu Jan 23, 2020 9:42 am
Forum: Technical Papers for review and comment
Topic: Ultimate Sailing for Oldies
Replies: 5
Views: 17362

Ultimate sailing for oldies part 3

Ultimate Sailing for Oldies part III Let us take the most optimistic view of Ultimate Sailing in order to check whether the game is worth the candle. Let us assume that an elderly lightweight pilot is found. Let us also assume that the coefficient of lift of a first generation hanglider is two. Abbo...
by R Glencross
Thu Jan 23, 2020 9:41 am
Forum: Technical Papers for review and comment
Topic: Ultimate Sailing for Oldies
Replies: 5
Views: 17362

Ultimate sailing for oldies part 2

Ultimate Sailing for Oldies, Part 2 The seaplane’s lift has been calculated above. The craft’s flying capabilities and course can be computed if we know the aerodynamic and hydrodynamic drag and the true wind speed and direction. With regards to the aerodynamic drag, the vast majority of this is ind...