Subject: Re: : Re: : Re: : Re: : Re: : Re: [harryproa] Re:: Diesel Electric Drive
From: "Rick Willoughby rickwill@bigpond.net.au [harryproa]" <harryproa@yahoogroups.com.au>
Date: 3/21/2015, 2:10 AM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

Please point to the boat that has a displacement hull speed of 40 knots.
I already have - the LCS Independence:
http://gandoza.gandoza.netdna-cdn.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/u/s/uss-independence-lcs-2-trimaran-ship-_14_.jpg



Hmm, Let me try another approach. All lift is dynamic. You are being accelerated into the chair you are sitting on at 9.8 meters per second squared.  Or conversely you are being accelerated by your chair at 9.8 meters per second squared. There is no difference in force whatsoever.

A boat hull pushing water down at 50 lbs a square foot is exactly the same as water pushing up on the boat hull at 50 lbs a square foot.

A glider sitting in a hanger is exactly displacing its weight, the same as when it is flying straight and level.  There is no difference in the forces involved.
A


 glider sitting in a hanger is exactly displacing its weight, the same as when it is flying straight and level.  There is no difference in the forces involved.


This is all  gibberish - 
Dynamic lift by definition is the force created by virtue of the speed of an object through a fluid medium:

The glider sitting on the floor is displacing air support a tiny fraction of the glider's weight.  It is not in any way buoyant.  Take the wheel or stand off the glider and it will drop to the floor.   

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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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