A tear drop shape crossection it is then !

I think the drawing at http://www.tornado.org/uploads/documents/15.pdf makes it quite clear. The new carbon mast is again a tear drop (or water drop) shaped crossection. No wingmast for these guys, but great in comparing alu to Carbo.

There are a few additional details that are interesting. The spi hound is at 8180 mm leading to a hoist height above the beam of about 8250 mm or less. F18 has hound at 8150 and a max mast foot height of 120 mm. Typically the F18's have a hosit height of about 8220 mm. So the new tornado's have a gate height that is as good as the same as the F18's ! AT about 8235 - 500 = 7735 mm. This give F18 spis an aspect ratio (on this particular gate height) of 2.85 and the Tornado spi of 2.49 or 2.39 depending wether 24 or 25 sq. mtr. spi is used. This actually means that teh Tornado spi will be nothing more than the F18 spi with 4 sq.mtr of area glued to the leech. I'm not sure if that helps alot. It certainly explains why F20's do so well again Tornado's in the lighter winds. F20 have higher spi hounds and therefor longer spi luffs.


On the tpweights :

Carbon mast => 15.5 kg overall including (carbo) fittings; this leads to tipweights somewhere around 7.0 kg when looking at a tapered mast.

10.25 or 10.5 kg tipweight for the alu mast with normal fittings do square with an overall weight of 22-24 kg. Weight alu section per mtr = 2.15 kg. seems right in comparison with 2.0 kg per mtr for F18 mast that are slightly shorter.

Thanks for the data Rolf !

Appreciate it.

Wouter