What is this maneuver called?

[loadnabox]

So there's a maneuver I often do but I have no idea what it's called. It's similar to a hammerhead but a minor change.

A hammerhead is a quarter loop to 90 deg pitch followed by rudder input as airspeed slows to cause sudden yaw pivoting near the fuselage between the wings as a stall condition is reached. As airspeed increases past stall elevator is applied to pull nose up to level flight in the opposite direction of the original travel.

The one I do is a bit different. I quarter loop to 90 deg pitch. With plenty of airspeed remaining I apply aileron for 180 deg roll using minimal rudder to maintain nose fully towards the sky. As the roll is completed I ease off the throttle, apply elevator for a 180 deg loop, allow the aircraft to regain speed and bleed off altitude in a dive, then apply elevator for another quarter loop into level flight in the opposite direction that I had initially come from.

Anyone know what the second one would be called?

[Brandano]

half a cuban eight

[loadnabox]

half a cuban eight


Thanks, I wasn't sure about this either since most sites describe a half cuban eight being executed with only a 45 deg pitch up before inverting into the loop.

[MCarlton]

If the initial pull up is 90 degrees, its a sort of combination between a half square cuban with a conventional half cuban recovery.

Perhaps a 1/4 square loop into half cuban.

Actually, thinking about it, its actually a more or less "vertical split s"

[sixty9mustang]

Are you applying positive or negative elevator (up or down) to make your 180 degree loop? This would make a little difference as to whether it was a vertical split s or negative pushover. It can also be viewed as several maneuvers combined, not just one name.

Here is one for you, I do with a glider of mine. I start by pulling 90 deg into the vertical, then at the top, just before stall, I pull full up and right aileron, she does a 3/4 inside loop to the horizontal position, stalling the right wing tip, as the tip stalls she rotates 3/4 roll and is headed back down on the same vertical she went up on, exiting by pulling up again to the horizontal, leaving the opposite way she went in. Kind of fun. :D

Chip
Or just call it what you want.

[loadnabox]

Are you applying positive or negative elevator (up or down) to make your 180 degree loop? This would make a little difference as to whether it was a vertical split s or negative pushover. It can also be viewed as several maneuvers combined, not just one name.

Here is one for you, I do with a glider of mine. I start by pulling 90 deg into the vertical, then at the top, just before stall, I pull full up and right aileron, she does a 3/4 inside loop to the horizontal position, stalling the right wing tip, as the tip stalls she rotates 3/4 roll and is headed back down on the same vertical she went up on, exiting by pulling up again to the horizontal, leaving the opposite way she went in. Kind of fun. :D

Chip
Or just call it what you want.


I'm applying back stick/up elevator to bring it into the dive

I used to do something that looked cool until it toasted my cap 232. with plenty of airspeed remaining with 90 deg climb. hard right rudder, hard left aileron, hard down elevator (up stick). Made for a cool looking tumble mid-air, but I ripped the control rod from the elevator, had an unintended landing ;-)

[Texas Buzzard]

A Long time ago this would be called a Cuban eight. Where the Cuban comes from is a mystery to me.

[Montag DP]

A Long time ago this would be called a Cuban eight. Where the Cuban comes from is a mystery to me.Probably Cuba...

:D

[JaRaMW]

So there's a maneuver I often do but I have no idea what it's called. It's similar to a hammerhead but a minor change.

A hammerhead is a quarter loop to 90 deg pitch followed by rudder input as airspeed slows to cause sudden yaw pivoting near the fuselage between the wings as a stall condition is reached. As airspeed increases past stall elevator is applied to pull nose up to level flight in the opposite direction of the original travel.

The one I do is a bit different. I quarter loop to 90 deg pitch. With plenty of airspeed remaining I apply aileron for 180 deg roll using minimal rudder to maintain nose fully towards the sky. As the roll is completed I ease off the throttle, apply elevator for a 180 deg loop, allow the aircraft to regain speed and bleed off altitude in a dive, then apply elevator for another quarter loop into level flight in the opposite direction that I had initially come from.

Anyone know what the second one would be called?

There is no point during a Hammerhead turn where the wings stall. Vertical climb or dive means no lift, otherwise it would obviously not be vertical. This means zero AOA (symmetric profile); the wing never reaches its critical AOA regardless of its airspeed.

The maneuver you described is not a Cuban eight since the Cuban has no vertical climb/dive. It is rather a Humpty Bump with rolls in the climb/dive portions. There are several variations of Humpty Bumps, one of them being a vertical climb, 180° loop into a vertical dive, pullout. Aileron rolls or snap rolls can be implemented into the climb or dive phases.

[bjr_93tz]

JaRaMW hit the nail right on the head, 'tis a Humpty Bump and there a many variations on the theme.

Often seen as a turnaround maneuver in F3A and less commonly as a centre maneuver.

A "Humpty Bump Pilot's Option" gives you a little discretion as to how you do it, so a pull, 1/2 roll, pull, pull is a low k factor turnaround and only a brave soul would throw in a few vertical snaps just for show if the description didn't call for it :)

PS: All radii should be equal, half roll should be in the center of the upline (or downline), typically entry and exit is at the same height except for those who fly IMAC, in which case just do it however you can. As long the plane has a gas engine, "looks" like a real one and has the word Yak/Extra/Cap written on it, IMAC'ers can keep pretending that they're flying precision aerobatics .......... :D

[Brandano]

I'm applying back stick/up elevator to bring it into the dive

I used to do something that looked cool until it toasted my cap 232. with plenty of airspeed remaining with 90 deg climb. hard right rudder, hard left aileron, hard down elevator (up stick). Made for a cool looking tumble mid-air, but I ripped the control rod from the elevator, had an unintended landing ;-)

Looks like one of the common lomcovak variations. You can also alter the rate of the tumble with careful use of the throttle, since at that point gyroscopic forces are predominant

[JaRaMW]

this sort of vertical snap stuff also looks nice in gliders video (http://www.fsv2000.at/segelflug/artikel_002/Showfigur.mpg) and is pretty useful for scoring zero points in competitions.

[bjr_93tz]

I used to do something that looked cool until it toasted my cap 232. with plenty of airspeed remaining with 90 deg climb. hard right rudder, hard left aileron, hard down elevator (up stick). Made for a cool looking tumble mid-air, but I ripped the control rod from the elevator, had an unintended landing ;-)

What we have here when done properly are negative snap rolls in a vertical upline. With heaps of grunt you can do them all day 'till you get to the moon or with less grunt you'll get through the first one then perform a stall turn as what's left of your airspeed decays to zero. If it's been managed well, then again the snap will be in the middle of the up line and the stall turn won't be a wingover.. :)

If the sticks are held in the corners long enough with the plane tumbling around in random directions with the motor running full noise we have another IMAC maneuver. Most commonly seen in conjunction with plenty of smoke and very little altitude to earn those freestyle "wow factor" points.

"IMAC, not that there's anything wrong with that"
Jerry Seinfeld 1993 (paraphrased) :D