I and I as usual, but today I invited Doug and his thundercat too. Flight more stable but still often ended in a big crash. N4rkla got the top speed 16.66. I got longest ride approx 40 secs. Best photos were of Doug (on his first sail of a moth).
N4rkla ended the day by destroying another of my gantries. A youtube of him below doing the speed of the day.
mm thats got 'flap not working' written all over it. in both those photos the wand is out of the water but the boat is still going up. is the wand elastic actually resisting the force of the water pushing the flap down? is there enough travel in the flap? anyway looks like fun.
ReplyDeleteone item in the linkage is too soft and flexes a lot under pressure. not enough flap down when low, not enough flap up when high. once that is sorted I think it will be fine.
ReplyDeleteWatching N4rkla's crash, it is interesting to see him sail it into the sea. It gets a little high, develops a negative AoA and spears down into the water. It clearly isn't flying too high and tripping over the water surface.
ReplyDeletePerhaps he tried winding the tiller to get better attitude and overdid it?
one of the crashes was me rounding up with windward heel, which pushed the bow down.
ReplyDeleteI've got to stop breaking steering gear, it's an expensive habit.
ReplyDeleteIf you have any slack at all in the control systems that should be #1 on your to fix list.
ReplyDeleteWhen your setup is right, you should be able to sit a lot further forwards, and have the wand lift you off, then rely on the wand to bring you down.
If you need to sit way back to induce AOA to take off then you can't take that lift out quick enough when you get up (that was the problem for me when I converted Virtual Reality as the centreboard case was too far back).
Bruce
fo' shizzle
ReplyDelete