Pleased to report that I finally feel closer to mastering the sport of downwind foiling on a SUP. Yesterday I had my best run ever, in for us, marginal conditions 18-21kn with only one touch down on our 8km run. I did suffer from back leg burn which I hope will be remedied by moving mast a little further forward, but other than that, heart-rate was under control and it was actually less tiring than normal.
I put it down to 3 things:
1) The Kujira 1440 has been the game-changer for me. It's actually easier to paddle up than anything I have tried previously which includes Signature 210 + 250. + various others and my monster Foil-Smart 2600 Custom that I'd had the most success on.
The 1440 needs minimal bump and to get up is not as hard as I had feared. But the big difference is that once I'm up it keeps up with bumps and can easily be manouvered to stay in the right places and the super low stall speed allows it to find new energy with ease.
I use a 80cm mast and the Signature KD Mach1 tail with a slight shim for more lift.
2) I also think countless wing-downwinders has helped a lot. I'm much more confident as to where I must position myself and am now beginning to understand where the energy is, and how to exploit it. Before the wing, my downwind "on foil time", was so limited that it was taking forever to learn.
3) Making it harder, to make it easier - Going down to a 5'10 SUP foil board (110L) for waves has taught me to put the power down for more explosive take-offs as the 5'10 feels glued to the water with no glide. Going back on my 6'5 (110L) I suddenly have heaps of glide assisting take-offs.
I had almost given up on the concept of SUP foil downwinding, but now think I might actually prefer it to winging, time will tell, maybe it was just a lucky one....