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ACRO E-mail Archive Thread: [Acro] Fw: Vertical Reversements or Cartwheels

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ACRO E-mail Archive Thread: [Acro] Fw: Vertical Reversements or Cartwheels



                


Thread: [Acro] Fw: Vertical Reversements or Cartwheels

Message: [Acro] Fw: Vertical Reversements or Cartwheels

Follow-Up To: ACRO Email list (for List Members only)

From: "Chris Burns" <cjburns1 at optushome.com.au>

Date: Sat, 28 Sep 2002 06:53:02 UTC


Message:

Where the confusion comes with these Reveresment maneuvers is they did not have individual names for them all back in the 1913s when they were doing them.
The maneuver first described as a Cartwheel was done by Pierre Chanteloup at an airshow on Christmas day 1913 when he pulled into a loop and the engine cut.  It tail slide backwards about 300ft and he put in rudder.  The aircraft pivoted through 180deg of yaw and he recovered gliding to the field.  The next day he went up and did a few deliberate ones and they called it a Cartwheel.  It was more of a tailslide using  rudder to recover rather than elevator.  The real stall turn had not yet been invented.  
The french at the time were doing a range of maneuvers called reversements and they were all variations of 180deg turn like Lazy 8s and wing overs.  Even the chandelle and Immelman fell into the loose term. 
 To add to the confusion a lot of pilots at that time used the same terms for different maneuvers. All of these reversements seem to involve a climb in excess of 45deg.  Non at that time (1913/14) were pivoting on there axis (Yawing around the CofG with power on for slipstream effect) as in what we know as a stall turn.  They were what we call wing overs.
The reversment variation that includes a half snap roll is not only useful to teach advanced students good coordination  as PittsS2Birdie says, it is a good low energy loss turn.  I use it sometimes when doing demo's at low level with low powered aircraft.  You can pull up to 45 / 60deg and just when you have enough energy left to do a half snap roll you put in left rudder (If the prop goes clockwise looking from the cockpit) with back stick and the aircraft does a gentle half snap and faces back the way you came.  By yawing left the gyroscopic effect of the prop raises the nose so it wont finish up in a steep nose down attitude and it flattens the turn knocking off the forward speed.
I call this a 45deg stall turn but if someone wants term it a vertical reversement thats OK.  So long as you do it right.

Chris Burns


----- Original Message ----- 
From: PittsS2Birdie at aol.com 
To: acro at gf24.de 
Sent: Saturday, September 28, 2002 10:38 AM
Subject: [Acro] Vertical Reversements or Cartwheels


Col. Roscoe Turner and Jean H. Dubuque in "Win Your Wings":

"The vertical reversement or cartwheel is a variation of the half snap-roll.  It can be performed in exactly the same manner, except for starting and recovery position, but usually it is not.  Ordinarily it will be more controlled throughout, with the change of attitude not quite to the same degree, since it is started from a steep bank, almost a vertical, and ends in a steep bank in the opposite directon.

This maneuver is essentially a training maneuver and, in common with all such maneuvers, teaches you control touch, efforts required to accomplish a desired reaction, proper timing of such efforts, and utililization of speed.  It is especially well adapted for these purposes with advanced students, who may be catalogued in two general classes:  the over-zealous and the over-cautious.....The vertical reversement is of considerable assistance in doing this, since it penalizes both types and requires average ability and technique..." 
Attachement 1: part2.html


                


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