A few Sherman Island 9/3/2006 Pics

OliverG · Post by **OliverG** » Mon Sep 04, 2006 10:30 pm

High and fly is the idea, I was trying to get enough altitude to get the full two with enough time for a clean landing...I'm pretty sore too...fun times, though. :)

berrisbob · Post by **berrisbob** » Mon Sep 04, 2006 11:07 pm

Any guesses on her altitude in that photo?

Remember, Michelle, you gotta watch out for low flying planes at Sherman now!

I calculate her head to be 19.16 feet above the water. Pretty good, but I've seen her go much higher many times.

I should have the images I shot (including the following one of Dave, going "bigga") out at the tule island posted on my site in the next few days. Stay tuned.

OliverG · Post by **OliverG** » Mon Sep 04, 2006 11:23 pm

It looks like he's smiling...

windhorny · Post by **windhorny** » Tue Sep 05, 2006 9:01 am

That kite has got to be one of the fastest turning kites I have seen!

Bulldog · Post by **Bulldog** » Tue Sep 05, 2006 10:08 am

There's a joke hidden in that equation that only Dave gets, right?

Michelle looks higher up than that to me.

All I know is, it's a good thing there's not a bunch of people sitting on that island holding their fingers out in front of them saying, "I am crushing you with my fingers", cuz otherwise, we'd all be toast.

Kite Adventures · Post by **Kite Adventures** » Tue Sep 05, 2006 12:06 pm

yah pink!
Brazil doesn't know what it's in store for Michelle!
See you guys soon!

berrisbob · Post by **berrisbob** » Tue Sep 05, 2006 12:43 pm

There is no joke in that equation, although there is an error - the amount of work required to lift Dave 18 ft in the air is about 6300 J (joules), not 6300 N (newtons). If he were to free-fall from that height, as he almost did a few minutes later when his kite nearly collapsed mid-flight, then he would be traveling about 34 mph on impact.

I calculated the height of Dave's and Michelle's jumps by using the measuring tool in Photoshop to measure the distance from their heads to their feet (compensating for the bent posture in Dave's case), and then dividing by their body heights, to get the image scales at their distances. For Michelle: about 3 pixel/ft. I don't remember Dave's. I then measured from the lowest point on their bodies to the point on the water directly below them. for Michelle: about 57. This is where the big uncertainty comes in, since I have to guess where on the water that is. Dividing these values by the image scales calculated above gives the heights of their jumps.

The spot I used in Michelle's case was just a bit beyond the nearby 200 ft buoy. The result was the rediculously precise but likely somewhat innacurate value of 19.16. ft. Best case would be if she was only at the distance of the buoy, which gives about 24 ft.

The bottom line is that both Michelle and Dave go big, and it's a lot of fun to watch and photograph them :)

fearlu · Post by **fearlu** » Tue Sep 05, 2006 2:07 pm

Ahhh PHYSICS! Ain't it grand? (I actually enjoyed my physics classes-- I know-- NERD!) Yeah, it's the family JOULES. And yes, I was dropping at 34 mph when I fell from the sky during the jellyfish event.

So what you're saying is (bottom line)...
"Michelle goes way bigger than Dave"!

:mrgreen: Thanks for the shots!

berrisbob · Post by **berrisbob** » Tue Sep 05, 2006 6:43 pm

Got the rest of my shots posted...
http://users.ca.astound.net/berris/wind_kite_surf.html
Go to the link for 9/2/2006

Dave, image 153 is of the jump where your kite went berserk, and you can see it's partially collapsed. I didn't take another shot on that jump, so there's no way to tell how much more it collapsed.

OliverG · Post by **OliverG** » Tue Sep 05, 2006 7:02 pm

Scott,

As always, great pics! How do you do the image sequence? In Photoshop, and how so?

Ollie

BayAreaKiteboarding.com

A few Sherman Island 9/3/2006 Pics

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