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					Originally Posted by  Crumpp
					 
				 
				Go back and re-read. 
			
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 Graham's original point was clearly not a reply to your statement. period.
 
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					Originally Posted by  Crumpp
					 
				 
				We see the magnitude of the affect of weight in our parametric study. 
			
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 Nope, it gives too high magnitude for this specific problem. 
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					Originally Posted by  Crumpp
					 
				 
				Why do you think the forumla is there under the portion explaining the affects of weight in the aerodynamic textbooks? 
			
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 The formula is mainly for calculating cruise speeds at L/D max, just like Graham pointed out earlier. It assumes constant Cl so it is not a good method for our problem here.