[NSRCA-discussion] SNAPS ! AGAIN !

[Richard Strickland]

Does this mean we can actually go back and do nice looking, fast snaps like God intended?

RS
 


Date: Sat, 27 Feb 2010 20:22:06 +0400
From: khoard at gmail.com
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] SNAPS ! AGAIN !

Why would you let something as trivial as mathematics (or physics) get in your way?


On Sat, Feb 27, 2010 at 8:21 PM, Ron Van Putte <vanputte at cox.net> wrote:

Oh my!  I hope John realizes what he's stepped in here.

Ron

On Feb 27, 2010, at 9:36 AM, John Fuqua wrote:


A full scale friend lent me a book by Alan Cassidy entitled “Better Aerobatics” which had a formula for determining how many Gs to pull to enter a snap.    It is very enlightening.



Formula is  =  Recommended entry speed to enter snap divided by the Power ON stall speed  - Squared.



His example (Pits S2A) was  105/55 =1.909  (1.909)2  =3.64 Gs.    This means you would try to have an  instantaneous 3.64 G loading if entering the “flick roll” at 105 mph.



What I find fascinating about the formula is the “power on stall” part of the formula.   Now translate that into our models which have NO power ON stall speed.   I think this means that mathematically we cannot do a snap.   Or the instantaneous Gs required are impossible to obtain.



















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-- 

Keith Hoard
Collierville, TN
khoard at gmail.com


 		 	   		  
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