[NSRCA-discussion] SNAPS ! AGAIN !

[mklein25 at roadrunner.com]

Thanks to everyone for keeping me entertained as I slave away here during my busy season (I'm a CPA).  Wish I had time to chime in, but for now I will stick to getting the occassional laugh as I take a break to view the threads.

Oh well...back to work so I can afford my new planes and batteries for the upcoming season.  See you all in a couple months :-)

Mike
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: Ron Van Putte <vanputte at cox.net>
Date: Sat, 27 Feb 2010 10:21:08 
To: General pattern discussion<nsrca-discussion at lists.nsrca.org>
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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