Avalanche vs snap

[Edward C. Hernandez]

   Tarnation, what a great word that is not used often enough! I didn't know
we had Yosemite Sam flying pattern. Just imagine Y'Sam arguing about his
zero'd snap score after his flight. Naturally, Bugs Bunny is one of the
judges...
   On a more serious note, I was playing with my sport trainer the other
day, after having added more elevator throw to turn the sashays into snaps
by "initiating a break". See, I'm learning from y'all(another great word
from my native Texas). They still aren't quite snappy, but they did improve
quite a bit. Then I tried an avalanche, which I think is when you pull a
snap at the top of an inside loop, then finish the loop. Wow, the snap at
the top of the loop is much more violent than pulling a snap while flying a
straight line.
   Why, on my wimpy sport trainer, is the snap in the loop more violent than
a snap in a straight line? Is it because the elevator is already deflected
and the plane is flying at a higher alpha, so reaching the stall or yet
higher alpha doesn't take as long as trying to reach it from neutral
elevator?
   Along the same lines, where does the throttle go during a snap, to idle
then back again? Or leave it alone?

Ed "look, ma, I'm dancin' now" Hernandez

----- Original Message ----- 
From: "Terry Brox" <tbrox at cox.net>
To: <discussion at nsrca.org>
Sent: Wednesday, April 14, 2004 11:29 PM
Subject: Re: Snaps (Redneck translation for Robert Gainey)


That sounds more like ebonics. That is a good one though.
----- Original Message ----- 
From: "Jerry Budd" <jbudd at QNET.COM>
To: <discussion at nsrca.org>
Sent: Wednesday, April 14, 2004 8:44 PM
Subject: Re: Snaps (Redneck translation for Robert Gainey)


> Oh, OK Robert.  Since you asked, here it is in Redneck:
>
> A win' is stalled when th' lif' curve slope changes sign, meanin'
> thet a further increase in angle of attack (AOA) results in a
> reduckshun in lif', due t'increased separeeshun of th' airflow
> disruppin' th' pressure distribushun on over th' top of th' win'. Th'
> AOA (also refered t'as "alfy" in th' flight tess wo'ld) at which th'
> lif' curve slope changes fum positive t'negative is whar th' maximum
> lif' coefficient (CL-max) of th' win' (o' vehicle) is retched an' is
> typically foun' t'occur aroun' 18 t'30 degrees alfy. It's a funckshun
> of a whole lot of thin's like aspeck ratio, planfo'm, corntrol
> surface defleckshun, Reynolds #, Mach#, etc. It is NOT a funckshun of
> airspeed, cuss it all t' tarnation.
>
> But ah digress...
>
> Jeremiah
>
>
> >In a message dated 4/14/2004 7:26:42 PM Eastern Standard Time,
> >jbudd at QNET.COM writes:
> >
> >
> >A wing is stalled when the lift curve slope changes sign, meaning
> >that a further increase in angle of attack (AOA) results in a
> >reduction in lift, due to increased separation of the airflow
> >disrupting the pressure distribution over the top of the wing.  The
> >AOA (also refered to as "alpha" in the flight test world) at which
> >the lift curve slope changes from positive to negative is where the
> >maximum lift coefficient (CL-max) of the wing (or vehicle) is reached
> >and is typically found to occur around 18 to 30 degrees alpha.  It's
> >a function of a whole lot of things like aspect ratio, planform,
> >control surface deflection, Reynolds #, Mach#, etc.  It is NOT a
> >function of airspeed.
> >
> >But I digress...
> >
> >WOW Buddman! That was great! Can you give it to me in redneck?
> >
> >Your redneck pal
> >Robert
>
>
> -- 
> ___________
> Jerry Budd
> mailto:jbudd at qnet.com
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