I'm happy the pace of development is slow enough that I can race my second hand spotz2 (with reenforced mast/fuselage connection) and not be at a huge disadvantage for sport. Although, technology (and better production methods) has made the newest designs more rigid and robust. I'm waiting for the new Levitaz and KFA foils to hit the second hand market so I can upgrade when there's a subtle tweak next. Hopefully before the peg on my front spotz 2 wing and fuselage explodes!davesails7 wrote:Racing evolution has slowed to a stop also despite most races being an open class.
Some still think spotz 2 (released in mid 2014) is the fastest. Spotz 3 was a slight change to the spotz 2 (mid 2015). Maxime is still winning on sword 2 (2014).
New race foils from other companies have come out, but they seem to just be catching up to the spotz and sword, no major breakthroughs.
Currently, one wing pushes up and one pushes down. If they can eliminate the wing that pushes down, that should create a higher efficiency.davesails7 wrote:Racing evolution has slowed to a stop also despite most races being an open class.
Some still think spotz 2 (released in mid 2014) is the fastest. Spotz 3 was a slight change to the spotz 2 (mid 2015). Maxime is still winning on sword 2 (2014).
New race foils from other companies have come out, but they seem to just be catching up to the spotz and sword, no major breakthroughs.
ronnie wrote:Currently, one wing pushes up and one pushes down. If they can eliminate the wing that pushes down, that should create a higher efficiency.davesails7 wrote:Racing evolution has slowed to a stop also despite most races being an open class.
Some still think spotz 2 (released in mid 2014) is the fastest. Spotz 3 was a slight change to the spotz 2 (mid 2015). Maxime is still winning on sword 2 (2014).
New race foils from other companies have come out, but they seem to just be catching up to the spotz and sword, no major breakthroughs.
Changing the angle of attack of the foil is currently done by swinging it forward or backwards on the end of a 1 metre mast. That then requires a form of auto-correction to stabilise the centre of lift while the wings are being swung fore and aft relative to the rider (hence the second wing).
Moths and a few other craft have surface following wands, which control the pitch by keeping the AOA of the vessel constant, but altering the foil.
eg. on Page 7, a hinged foil on the bottom of a fixed mast.
http://www.glidefree.com.au/Operating%2 ... s%20R4.pdf
They studied whether it was more efficient to use ailerons on a moth or alter the whole wing, and found altering the AOA of the whole wing was more efficient.
So it may be more efficient (and faster) to race with just one wing.
One Wing Foil.jpg
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