[NSRCA-discussion] SNAPS ! AGAIN !
mklein25 at roadrunner.com
mklein25 at roadrunner.com
Sat Feb 27 09:16:42 AKST 2010
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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