Sailrocket is no way inspired by Hydroptère, and in fact one might argue that they could not be more different:
Hydroptere works by countering the heeling moment caused by the force on it's sails and foils, with, basically, it's weight (it's weight times the distance between the center of gravity and the leeward foil) whereas Sailrocket works by having NO heeling moment and actually somewhat of a negative one, as the leeward hull can be seen lifting clear out of the water at speed.
Hydroptere lifts out of the water by using foils, which are basically wings that work in water (at the air/water interface actually, which causes a host of problems) whereas Sailrocket skims along on planing surfaces, just like a powerboat or a windsurf.
Finally, Hydroptere works on both tacks (wind coming from either side) where Sailrocket only works on one tack. Some fascinating workarounds for this issues have already been worked out by Bernard Smith by the way.
Hydroptere works by countering the heeling moment caused by the force on it's sails and foils, with, basically, it's weight (it's weight times the distance between the center of gravity and the leeward foil) whereas Sailrocket works by having NO heeling moment and actually somewhat of a negative one, as the leeward hull can be seen lifting clear out of the water at speed.
Hydroptere lifts out of the water by using foils, which are basically wings that work in water (at the air/water interface actually, which causes a host of problems) whereas Sailrocket skims along on planing surfaces, just like a powerboat or a windsurf.
Sailrocket, as indicated in the article, owes a lot to Bernard Smith ( seminal work : http://www.amazon.com/Sailloons-Fliptackers-High-Speed-Saili... )
Finally, Hydroptere works on both tacks (wind coming from either side) where Sailrocket only works on one tack. Some fascinating workarounds for this issues have already been worked out by Bernard Smith by the way.