[NSRCA-discussion] SNAPS ! AGAIN !

[Pete Cosky]

Let me go make the popcorn...this is gonna get good.

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ron Van Putte
Sent: Saturday, February 27, 2010 11:21 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] SNAPS ! AGAIN !

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