Not long it seems! Bjorn just did 46 knots on his very first run!!

is Bjorn there yet?

quote :
Hey, after 55 hours of traveling we made it to the Luderitz Speed Challenge around 13:00. I did around 10 runs in great condition 30-40 knots of wind. First 47, then 48 knots then, 49, so improving! ;-) With 52.55 GPS top speed pretty happy about the first day on the water!! ;-) So long, Björn

sailquik said...

elmo said...

sailquik said...
it will be really interesting to see how long it takes for Bjorn to get dialed in.

Hope he's not like the rest of us (pretty certain he's not)

Get down the run late on a cranking day only to realize he'd left his harness and booms at home

That reminds me. Did you see the video where Anders tried to start the run with his fin cover still on the fin! He is human after all! I can admit now that I have done that myself!

With a couple of years more seniorority and "experience" you may be able to complete a run before noticing.

Didn't realise how tiny Lena is

Weight 62 kg
Weight Class 61-70
Height 164 cm
Age 23

Average speed 45.94 knots ( 46.63 46.31 45.9 45.54 45.3 )
Max. 2 sec. (software) 48.26 knots
100 m run 47.54 knots
250 m run 46.48 knots
500 m run 45.41 knots
Nautical mile 0 knots

There's hope for you still Daffy

sausage said...
Ah well I've got her on the nm.

and the pie eating

choco said...
Didn't realise how tiny Lena is

Weight 62 kg
Weight Class 61-70
Height 164 cm
Age 23

Average speed 45.94 knots ( 46.63 46.31 45.9 45.54 45.3 )
Max. 2 sec. (software) 48.26 knots
100 m run 47.54 knots
250 m run 46.48 knots
500 m run 45.41 knots
Nautical mile 0 knots

There's hope for you still Daffy

I wonder how much lead weight she carries

I've just noticed that the nissan Cedric (Bordes) has posted a new 2 sec peak record of 53.71 kn
www.gps-speedsurfing.com/default.aspx?mnu=rankings&Year=-&Tab=0&Gender=0&WeightClass=0&AgeClass=0&SpeedType=8

Its great to see that the top speeds are being acheived on such a wide variety of brand of kit.

yeah I always thought Magnus was a RDM kind of guy

choco said...
Didn't realise how tiny Lena is

Weight 62 kg
Weight Class 61-70
Height 164 cm
Age 23

Average speed 45.94 knots ( 46.63 46.31 45.9 45.54 45.3 )
Max. 2 sec. (software) 48.26 knots
100 m run 47.54 knots
250 m run 46.48 knots
500 m run 45.41 knots
Nautical mile 0 knots

There's hope for you still Daffy

Yes Choco, I had already noticed that.

No pressure hey?

Her results are inspiring to say the least!

choco said...
Didn't realise how tiny Lena is

Weight 62 kg
Weight Class 61-70
Height 164 cm
Age 23

Average speed 45.94 knots ( 46.63 46.31 45.9 45.54 45.3 )
Max. 2 sec. (software) 48.26 knots
100 m run 47.54 knots
250 m run 46.48 knots
500 m run 45.41 knots
Nautical mile 0 knots

There's hope for you still Daffy

yep she very small got a photo of me and her at the defi somewhere

Put your hand out of the car window next time you are doing 100km
Its so fast!!

How about drafting. Cool to see 6 guys on the course at once.

yoyo said...

JustinL said...
Put your hand out of the car window next time you are doing 100km
Its so fast!!

which begs the question . Why no body streamlining?

I think the body air drag is not that critical because traveling at 50 kts in 40 kts of wind at a broad angle the apparent wind they're experiencing would be pretty light.

Yes the 58 kph in Dr Speed's diagram is less but not insignificant.

Putting in a few estimates, put in yours if you like, Cd for a person 1.0, cross sectional area presented to wind 0.5 sq metres, density of air 1.2 kg/m^3, 58 kph = 16 m/sec. Put those estimates in the drag equation ie. drag = 1/2 Cd A rho V squared and get drag = 76.8 newtons. (7.8 kg).

Looks like from Dr Speed's diagram only about Sin 45 of that is in direction of travel = 5.46 kg. The other 5.46 kg transverse to the direction of travel adds load to the fin, but the fin has a good lift to drag of say 20:1? 10:1 ?? (I've never been able to wind up a fin designer sufficiently for them to hazard a guess on this ) So maybe add 0.5 kg of extra fin drag to give 6 kg drag opposing the direction of travel. That's a fair bit, how much would streamlining reduce that by?