My take on Suubk27's amazingly well done Test Dummy, whom I initially strapped the rocketpack onto, but couldn't bring myself to immediately re-upload something that took like only a few minutes...

So I spent the better part of today making an equally great Female test dummy, similarly based on the actual article!
It didn't seem fair that the gals of SimplePlanes didn't have representation. :) Please know I took a lot of care to not make this exaggerated and it is not meant to be lewd in any way!
Based off of this image.

"Betsy" (instead of Buster) stands 5ft 7in tall, weighing roughly 145lbs (sans rocketpack). Compared to the original, it's sculpted to be more petite, but not to any great extent. Given a butt and a bust, although to be fair, the male one I originally did I had already given buttocks to. lol

I also re-worked the Shoulder and Hip joints to provide more realistic movements.
Shoulders now free to move in all directions, and I tried to make it similarly limited as best I could, keeping with the groundwork Suubk laid down.
Hips swivel now connected at 45deg to rotate as the hip ball socket would; fittingly more flexible, as is true to nature.
Other joints were tweaked accordingly, to further the realistic limits. Although, during free-fall, the knees still have a tendency (or tendoncy? bazinga!) to ... bend backwards ... <_>

The JATO, or Jet Assisted Take Off, was a small 'rocket' motor strapped to planes to give them Short Take Off ability. One would've been plenty, but that's not how I roll, so I strapped two together! "Buckle up, buckaroo!"
Also, a Gyro stuffed in the chest, just to provide some control authority, but tweaked down to not be overpowering. (You'll want to remove this for non-JATO use.)

CONTROLS & INFO

Yaw, Pitch, Roll for... those very functions.
AG3 to light the motors.

Burn Time: 100 seconds, after which point you're at the mercy of gravity.
Top Speed: Roughly 5300 mph
Max Altitude: Roughly 275,000 ft

After loading in, she will sit down in a.... less-than-lady-like pose (blame anatomy and physics, not me!), but shouldn't* fall over, leaving you primed to launch off w/o issue.

(Shakedown run of pre-finalized seatbelt configuration, but is only 2 more parts different.)

If you like mine, please be sure to like the original, as they did a superb job creating this.

ENJOY!