Jim My spikes ( hand turned out of aluminum) wont hold me in these currents
but will help me manover. Our river sticks are designed to help us in
current diving. Down stream lets say near harsons island my spikes do quite
well and the current is only .5 to 1 knots but vis is normally less than 4
feet or so. I have seen it as high as 10 though. Depth here runs 35 feet
with heavy frieghtor traffic. It is a very interesting dive with lots of
artifacts to find.


----- Original Message -----
From: "Rogers, Thomas A" <Thomas.Rogers@PS*.Bo*.co*>
To: <techdiver@aquanaut.com>
Sent: Thursday, August 02, 2001 4:39 PM
Subject: Drag force generated by a diver in the water


>
> I ran some calculations on the Drag force (lbs) which would be generated
by a diver in the water as a function of the current.
>
> These are ROUGH numbers.  I am also assuming this test subject has perfect
trim and is not moving.
>
> The test subject was 220 lbs and 76 inches tall. I ran 4 configurations.
I used PST 104 tanks and a 6 in EE light
>
> Streamlined means Basic DIR setup with canister light and legs straight.
> Bent Knee means Basic DIR setup with canister light and legs bent.
>
> Current Velocity (knots) 1 2 3 4 5 6 7
> Streamlined -single 9 36 82 146 227 327 446
> Bent Knee - single 16 67 151 269 420 605 823
> Streamlined -Double Tank 10 42 94 168 262 377 513
> Bent Knee --Double Tank 18 73 164 291 455 655 891
>
> These are ROUGH numbers.
> These are ROUGH numbers.
> These are ROUGH numbers. But they are good illustrations and talking
points.
>
> tom
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