Fw: poling dangers

[jrc <jrccea@bellsouth.net>]

----- Original Message ----- 
From: "jrc" <jrccea@bellsouth.net>
To: <mhabib5@jhmi.edu>
Sent: Monday, April 17, 2006 11:49 AM
Subject: Re: poling dangers


> Without doing calculations, I expect that they would hit the water during 
> the first 20 or 30 stroke cycles or more.  And since forces in the water 
> are about 800 times greater than in air, I'd expect the lower half of the 
> initial upstroke to be almost 30 times slower than usual.  For northropi, 
> say at a guess, 6 or 8 seconds or thereabouts to clear the wings of the 
> water on the first upstroke, instead of the usual quarter second for the 
> lower half of the first upstroke.
>
> Jim
>
> ----- Original Message ----- 
> From: "Michael Habib" <mhabib5@jhmi.edu>
> To: <dinosaur@usc.edu>
> Sent: Monday, April 17, 2006 11:34 AM
> Subject: Re: poling dangers
>
>
> > Not only are the wings going to hit the water during the first stroke 
> > cycle, but I would also expect that the launch would be very slow indeed