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oscardog said..Shlogger said..
I'm an advocate of the technique at the 1:15 mark. Though using the same technique I like to start out w micro pumps using the same action until you feel that feeling you know you need that says you have a 50/50 chance of coming up.
The pumper at 1.15 seems to use clockwise mast movements with left hand forwards (port tack), like Balz Muller. First move is left arm outstretched and forward, then around to the right, then pull close to body, then repeat. All others (including Bart) seem to pump in and out, i.e. if on port tack, right hand doing longer strokes than left hand. (Of course Bart pumps so hard that from Northwest Europe, we in the rest of the world, get foiling on the created gust.) :)
I seem to get the latter "all others" technique working more easily. Is this a timing thing vs pumping the foil?
Or something else?
With the smaller sails I also do more round movements, I explained part of it in the other thread (see below). The key answer to your question is that a more high aspect sail is better pumped by reflexing the mast, and a smaller, low aspect sail is better pumped through the backhand, at least generally for foiling. The circular movements allow pumping the sail through the backhand without rounding up into the wind as you keep the center of effort of the sail over the board!
EDIT: if you look at the vid of Amado, he is sailing with an older version hyperglide, so lower aspect, and if you look closely he is also using circular movements, with the sail gliding forward at the end of the pump instead of side to side.
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WhiteofHeart said..
Technique changes a lot depending on the sail though. I pump my racing sails way more through the sails mast, whereas I pump my wavesails through the backhand. Understanding how your sail works best and generates most power is also one of the key points to getting going in light winds.
Second (and more important probably, but this part doesnt work without having the first part worked out) is matching the rithm of loading and unloading the board with the pump and glide phases of pumping the sail. As you pull the sail towards you (pump phase) you also pump the board, but loading and unloading the board has to be slightly out of phase with the sail pumping movement, that makes it hard. At the last half of the pump phase you have to get your weight up off your feet to unload the board and keep it gliding all the way through the sails glide phase (extending the sail forward) untill you can put in your next pump.
If you look at the board and position of my body and sail in my video closely you should be able to see what I mean. If the time spent pumping the sail is 50/50 pump/glide, you only pump the board 30/70. Those 20% of the time where your board is in the glide phase but your sail is still in the pump phase is where you accelerate most and where I think most can be gained for most riders.
As soon as you are up on the foil / making those semi-flying bounces on and of the water by a few inches the technique changes again, for as maybe sounds familiar to those of you who have pumped the foil in the air, its pushing the foil down and not up which makes it accelerate. Once I'm up I push every bit of power from my sail pump through the front foot to push the foil down, and use the glide phase to unload the board and regain height. Timing for pumping in flight would be more 50/50 - 50/50 and matched in terms of rithm.
stehsegler
> 9 months ago, 4 May 2020
