Attachment_5_-_Wind_Tunnel_Body_Stability_Class.ppt
PPT presentation 4 MB Posted
- Attached to
- Static Line & Military Free Fall COI for ATC
- Solicitation number
- H92240-15-R-0002
- Issued by
-
United States Special Operations Command
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Attachment 5 - Wind Tunnel BSC
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The overall classification of this briefing is:
UNCLASSIFIED - FOR OFFICIAL USE ONLY
VERTICAL WIND TUNNEL BODY STABILIZATION
FOR OFFICIAL USE ONLY
Learning Objective DESCRIBE the proper body positions in Free Fall to maintain body stabilization, execute left and right turns, hover control, side slides, checking the altimeter, and simulate manually activating the main parachute during Free Fall operations in accordance with Military Free Fall Parachuting Tactics, Techniques, and Procedures, ATTP 3-18.11; and Naval Special Warfare Air Operations manual, COMNAVSPECWARCOMINST 3000.3 (Series)
Preview
| Body position |
| Hand Signals |
| Relative Wind |
| Right/Left Turns |
| Forward/Backward Movement |
| Altimeter Check |
| Pull Procedures |
Body groups that affect stability
Hips Arms Torso Legs Head
Body Position
Hips
Center point of the arch Lowest point of the body Avoid arching with the chest
Demonstrate a proper arch
Body Position Arms
90 degree bend at the shoulder 90 degree bend at the elbow Hands should be about level with the top of your head, and thumbs should be somewhere between your ear and the front of your head.
Use just enough strength to hold in place
Body Position Torso
Straight Relaxed (Rigid Torso = Rigid Everywhere) Keep chest rounded This does not mean arch with your chest
Body Position Legs
45 degree bend at the knee Knees should be shoulder width apart Feet pointed Use just enough strength to hold in place
Demonstrate proper arms and legs
Body Position Head
Keep your head up as if you were looking at the horizon You can move your head around without sacrificing stability (keep your head on a swivel)
Body Position Neutral Freefall Arch
Pelvis down (arch) Positive Leg Pressure, Shoulder Width Apart Keep your Head up Elbows at approximately 90 degrees Relax Demonstrate a proper neutral body position
Neutral Freefall Arch
Neutral Freefall Arch
The overall classification of this briefing is:
UNCLASSIFIED - FOR OFFICIAL USE ONLY
Demonstration
Relative Wind / Air Flow
| The air flow around your body while in freefall is often referred to as Relative Wind |
| Understanding this air flow is critical!! |
| Your initial contact with this air occurs when you exit the aircraft in a stable position (much like the air down the side of your car as you put your hand out the window at 60 MPH!) |
| As gravity takes over and you transition to a belly to earth position, the air appears to be coming up from the ground. |
Relative Wind / Air Flow
Hand Signals
| In order to assist you in attaining a good body position and to prompt you to action, we use hand signals. |
| It is crucial that you execute the appropriate action immediately upon the signal |
Hand Signals (cont) Arch (Pelvis Down)
Hand Signals (cont) Arch (Pelvis Down)
Push pelvis forward
Keep chin up and look to the horizon
Keep legs still
Hand Signals (cont) Legs Out
Hand Signals (cont) Legs Out
Extend toes towards horizon 6” at a time until the signal is removed
Move smoothly
Shoulder width apart
Hand Signals (cont) Legs In
Hand Signals (cont) Legs In
Retract legs inwards 6” at a time until signal is removed
Smoothly
Keep arch
Hand Signals (cont) Check Arms
Hand Signals (cont) Check Arms
A straight line from elbow to elbow
Thumbs are almost in line with your ears
Relax the hands, no clenched fists!
Hand Signals (cont) Bring Knees Closer/Wider
Hand Signals (cont) Bring Knees Closer/Wider
Keep toes pointed
Move knees smoothly to shoulder width
Arch simultaneously
This will make arching easier!
Hand Signals (cont) Chin Up
Hand Signals (cont) Chin Up
Elevate Chin and Look Straight Ahead
Arch simultaneously
Hand Signals (cont) The “Relax” Signal
Instructor shows loose hand
Take deep breath and exhale into relaxed arch
Loosen your own hands
Hand Signals (cont)
| Review |
| Arch |
| Legs In |
| Legs Out |
| Check Arms |
| Knees Closer |
| Knees Wider |
| Chin Up |
| Relax |
Movement
| Always begin movement from a neutral body position |
| Begin movements slowly. Increase input with proficiency and comfort |
| It does not take much input to move in the tunnel |
Movement
| Forward Movement |
| From a neutral body position |
| Slowly bring hands closer to your shoulder |
| Slowly extend (straighten) your legs |
Movement
| Backward Movement |
| From a neutral body position |
| Slowly extend (straighten) your arms in front of you |
| Slowly bring your feet closer to your buttocks |
Movement
| Left Turn |
| From a neutral body position |
| Look in the direction you want to turn |
| Slowly dip your left elbow while simultaneously raising your right elbow |
| Turn, Coast, Counter |
To counter a turn, give input for the opposite direction you are turning.
Movement
| Right Turn |
| From a neutral body position |
| Look in the direction you want to turn |
| Slowly dip your Right elbow while simultaneously raising your Left elbow |
| Turn, Coast, Counter |
To counter a turn, give input for the opposite direction you are turning.
Movement
| Altimeter Check |
| Altimeter is always worn on the left wrist |
| From a neutral body position |
| Rotate your left hand/wrist as if you were checking your watch |
| Rotate your head so that you can see the top of your wrist |
| Do not bring your left hand to your face |
Movement
| Pull Sequence |
| Used to inform other jumpers around you that you are getting ready to deploy your parachute |
| Three waves of the arms |
| Use this time to clear your airspace around you |
Movement Pull Sequence
Movement
| Pull Sequence |
| Wave Off |
| Look Right, Left |
| Arch |
| Look |
| Reach |
| Pull |
| Check |
Review
| Body Position |
| Hand Signals |
| Relative Wind |
| Movement |
| Left Turn |
| Right Turn |
| Forward/Backward |
| Altimeter Check |
| Pull Sequence |
QUESTIONS?
File details come from the government source that posted it. Updated .