Head-Down 101 — Find and hold vertical head-down

Application

Covers finding and holding a stable vertical head-down orientation as a solo skill: exits presenting head and shoulders to the relative wind, establishing vertical off the horizon reference, holding a neutral head-down position to the shuttlecock principle, back-fly→head-down transitions, monitoring drift against a ground reference, and cork-proof recovery at head-down speeds (270–400+ km/h, APF006 §7.1).

Three neutral head-down positions exist, straddle, daffy and shelf; none is advanced in itself (what is advanced is knowing all three and transitioning seamlessly between them), and HD101 flyers are encouraged to learn the strengths and weaknesses of each.

Tunnel routes typically teach the daffy first for static progression, then the shelf, while the straddle (legs wide and slightly bent, calves and outer thighs providing drag, APF006 §7.4) is common for flyers who learn head-down in the sky. Unaccompanied solo sky work is flown in a daffy with a continuous slow static turn per the FFP-F100 solo protocol (the project’s coaching doctrine).

Applies to flyers competent in HU 102 (solo head-up movement).

Environment: sky solo work, with tunnel drills as accelerator and preparation.

Supervision (scaffold stage): coach-held tunnel drills → coach as tunnel/sky reference → coach-briefed unaccompanied solo; early sky attempts should be solo or with a suitably qualified coach as reference, never with another unqualified flyer as the reference.

Pre-requisite units

FFP-F100, FFP-HU101, FFP-HU102. Entry after HU 102 aligns with the Australian Stage-1-complete equivalence (head-up control before head-down, the universal ordering across APF, USPA, British Skydiving and CSPA; head-down official-sources research consolidated summary). RPL route: see the RPL evidence set below.

Elements and performance criteria

1. Plan the jump

• 1.1 State the jump’s single declared objective and its success criteria.
• 1.2 Confirm exit order and separation with the load for a fast-falling solo (freefly after belly groups on an into-wind jump run), placing the planned work clear of adjacent groups’ columns.
• 1.3 State the work-cease altitude (5,500 ft is standard practice; ≥4,500 ft is the bare guide, and always at least 1,000 ft above planned deployment) and the deployment altitude.
• 1.4 State the solo protocol for the jump: daffy-only head-down, continuous slow static turn, and the cork-response sequence (recovery → rotate 90° → re-transition → resume the turn) (FFP-F100).

2. Prepare

• 2.1 Complete a freefly-specific gear check on own equipment (BOC pocket condition, bridle fully covered, riser covers tight, closing loop tight, handles secure, hard helmet, chest strap and harness tightened for vertical flight).
• 2.2 Confirm two functioning audibles are fitted, set and checked before any unaccompanied solo head-down jump.
• 2.3 Dirt-dive the exit presentation, the first transition and the recovery sequence on the ground.
• 2.4 Confirm the jump plan against the jump card with the briefing coach.

3. Perform

• 3.1 Exit presenting head and shoulders to the relative wind, adopting the planned head-down position.
• 3.2 Establish the vertical orientation within 10 seconds of exit (guide), keeping the horizon level in the line of sight (“the body follows the head”).
• 3.3 Hold a neutral head-down position (straddle, daffy or shelf) for 10 seconds with heading within ±45°, finish pointing in the same quadrant (tunnel or coached-reference environment), keeping more pressure on the legs than the arms (shuttlecock principle).
• 3.4 Perform a controlled back-fly-to-head-down transition, re-establishing vertical within 5 seconds.
• 3.5 Fly all unaccompanied solo head-down work in a daffy with a continuous slow static turn, never a held heading, never a carve (FFP-F100 solo protocol).
• 3.6 Check drift against the exit ground reference point at least once during working time, reading it as a trend that survives a turn (a real airmass-relative drive to correct), not as the common-mode wind drift the whole airmass shares (which is not corrected).
• 3.7 Execute the vertical recovery position immediately on any loss of the head-down position, maintaining freefly fall rate without corking.
• 3.8 On unaccompanied solos, re-establish head-down only after rotating 90° in the recovery orientation and confirming stability (column discipline, if a transition holds a non-vertical angle and induces lateral movement, the rotation stops successive drives accumulating in one direction out of your own column).
• 3.9 Abandon an unstable transition early rather than holding it, an unstable head-down position held on can build a very large horizontal drive.

4. Complete

• 4.1 Cease head-down work at the briefed altitude (within −0/+300 ft).
• 4.2 End solo work without tracking: turn 90°, pause, recover to back-fly, slow down, then transition to a belly orientation, dissipating speed over at least 1,000 ft before deployment (a soloist’s movement risks are already the dominant hazard, movement at breakoff belongs in formation jumps, where it is practiced and needed).
• 4.3 Deploy at the planned altitude, at belly fall rate, after checking airspace.
• 4.4 Fly the planned canopy pattern clear of other traffic.

5. Review

• 5.1 Debrief against the declared objective using video.
• 5.2 Diagnose one fault (drive direction, asymmetric leg pressure, arm dependence, jerky over-correction) and its correction for the next jump.
• 5.3 Log the jump in the logbook with a reflection naming the unit and skills assessed (e.g. “HD101 skills assessment”), the criteria results and the next-step recommendation, the curriculum is what makes a log entry meaningful.

Bold criteria are safety-critical. The Freefly Project is not a rulebook, these are strongly recommended best-practice standards within FFP courses, held non-compensable in assessment (any Not Yet Satisfactory on a bold criterion = unit Not Yet Competent, regardless of flying quality) because their failure modes, corking into traffic, drifting into an adjacent group’s column, a silent audible failure, are the ones that hurt people.

Foundation skills

• Briefing/debriefing communication.
• Altitude and fall-rate numeracy (head-down terminal speeds cited variously as ~160 mph per USPA sources and 270–400+ km/h per APF006, these figures are from different sources and are not simple unit-equivalents; both indicate a dramatically shorter working time of ~40–46 seconds from 13,000 ft).
• Planning and organising (exit order, ground references, jump-run geometry).
• Self-management under stress (recovery discipline; stillness, “be still, fly with purpose”: notice before correcting, move gradually, fly the range not the position).

Performance evidence (suggested sufficiency — adjust locally)

Ability typically evidenced across around 8 solo head-down jumps flown to the FFP-F100 solo protocol, each coach-briefed and video-debriefed (tunnel time may substitute for up to three of the skill-development jumps, not the assessment jumps), across at least two different days/conditions, including two consecutive jumps meeting all criteria without coach assistance or prompts, within a recommended 6-month currency window.

The jump count is a guide to how long it might take, not a quota, competency against the criteria, not the number, is the standard.

Suggested tunnel accelerator skills: neutral head-down flown off the net at moderate-to-fast wind speeds, fall-rate control up and down, turns each way, and the sit↔head-down flip transitions, with bail-to-back-fly as the standing recovery throughout (coach maintains a grip in early drills). Before the first unaccompanied sky daffy: tunnel video evidence of a stable head-down daffy with turns (FFP-F100 solo protocol gate).

Tunnel hours are a guide to how long it might take, never gates: a tunnel route to solid static head-down typically takes 10–20 hours depending on whether the flyer is also chasing dynamic skills, the gates are the performance criteria above.

Knowledge evidence

• State the work-cease and deployment altitude guides for solo head-down: ≥4,500 ft is the bare guide, but standard practice is a 5,500 ft breakoff for freefly, modern jumpers will generally not accept 4,500 ft, and 5,000 ft is occasionally agreed for an advanced, sufficiently small head-down group.
  • The work-cease is always at least 1,000 ft above planned deployment, with ≥1,000 ft of slow-down before deployment.
• State the head-down speed range and its effect on working time (~40–46 s from 13,000 ft) and on deployment (slow to belly fall rate before pulling).
  • Cited as 270–400+ km/h by APF006 and ~160 mph by USPA sources, these figures come from different sources and are not simple unit-equivalents.
• Explain corking, the sudden deceleration from ≈160–175 mph to ≈120 mph on reverting to belly, why the speed differential is dangerous in traffic, and why cork-proofing precedes any relative work.
• Compare the strengths, weaknesses and use cases of the three neutral head-down positions.
  • Shelf: strong forward drive and keeps the legs out of the formation’s burble (the VFS position of choice), but prone to an unstable forward drive if bumped from behind or leg-burbled, and the arms are restricted to the front of the body.
  • Daffy: the big-way position of choice, the most leg power, arms free to come wide in a round, the front leg stops a forward drive after a bump from behind, and it is the natural recovery from any straddle disturbance (a common technique: approach a big-way in shelf, transition to daffy on joining).
  • Its downside is being over-powerful at the edge of the flight envelope.
  • Straddle: fine, gradual vertical-speed control when speed is high and only small drag is needed (drag down the sides of the legs, light flyers in fast formations), the natural transition position as a dynamic formation passes through vertical (between wind on the calves and wind on the thighs), and it frees the arms out wide without a forward drive, but it is inherently unstable fore-and-aft.
  • And a disturbance in straddle generally resolves into a daffy.
  • None of the three is advanced in itself.
  • What is advanced is knowing all three and transitioning seamlessly between them.
  • Explain why unaccompanied solo work is flown daffy as FFP a considered project position: a shelf can quickly build a large forward drive with nothing staged to arrest it, daffy stages a front leg as a backstop against that runaway, and straddle, though drive-neutral by symmetry, recovers from any disturbance through a transient uncontrolled moment that resolves into daffy.
  • Which on an unmonitored solo is itself the cork risk.
  • A single known position also simplifies solo self-monitoring.
  • Concede daffy’s limits: it is over-powerful at the envelope edge, and its front leg is the turn generator (APF006 §7.5.3), so the safety claim is concentrated, consciously-commanded authority with a staged backstop, not that daffy passively resists carving.
  • Not an APF rule, APF006 gates solo head-down by no position, and its beginner guidance is straddle-shaped, so this is a conscious argued divergence.
• Describe the shuttlecock principle (more pressure on the legs than the arms, arms are for docks and stability, not steering) and the horizon-reference technique for finding vertical.
• Explain why back-fly is a genuine freefly foundation for head-down, not remedial “chump work”: the back-fly de-arch used for fall-rate control is virtually the same body shape the body passes through moving to a vertical position, and back-fly control transfers directly into the recovery-and-re-establish sequence this unit relies on.
  • Period Australian coaching framed the progression explicitly as Belly → Back-fly → Sit → Head-Down (head-down attempted off the net only after six-point control and a sit-to-sit transition), corroborating the belly/back-fly-before-vertical ordering (Jonathan Townsager, ASM 73 p.27).
• Explain why a slow, continuous static turn keeps a soloist in their own column, the containment argument: a drive input is body-fixed, so a held heading points any residual drive the same way all jump and drift accumulates without bound (into the next group’s column), whereas a continuous closed turn points that same drive through every direction so it integrates to roughly zero net displacement.
• Geometrically bounding the drift to about one carve-circle.
  • A paused or uneven turn reopens the circle.
  • Explain why a heading-hold or “face off jump run” strategy is only partially effective for a soloist, and why turn direction is varied across jumps (a same-direction turn can mask a body asymmetry that biases every turn one way).
  • A drive can also become a little more noticeable during a turn, a small centripetal effect and a shifting sight-picture, but that is a weak detection bonus at slow rates, not the reason the turn works.
• Explain why an unstable transition should not be held: an unstable head-down position held on can build a very large horizontal drive, for a sense of the scale, watch how much horizontal distance competent flyers cover breaking off from a formation.
• Explain why a soloist ends the jump without tracking (turn 90°, pause, recover to back-fly, slow down, transition to belly, deploy): the solo’s movement risks are already the dominant hazard, so adding movement at breakoff is unnecessary risk, movement at breakoff is practiced in formation jumps, where it is needed.
• Explain why two functioning audibles should be regarded as mandatory best practice before any solo freefly: an audible is a hidden, safety-critical device that fails silently.
  • A group’s breakoff provides altitude redundancy that a soloist lacks.
  • And a single audible failure when solo can end in an AAD fire beyond the reserve’s flight envelope.
  • Two dated Australian cases show the consequence when a vertical body position meets an unplanned deployment: a C2 vertebra fracture after a sit-fly deployment went unstable (ASM 69 p.29).
  • And multiple vertebral fractures on a distracted solo freefly jump on which the audible was missing (ASM 53 p.67), the second case reinforcing exactly this unit’s doctrine that audibles are mandatory safety infrastructure for a soloist, not an accessory.
  • (Teach the mechanism and the lesson only, do not attribute either case to a named jumper.).
• State the exit-order and separation logic for a fast-falling solo, including orienting work perpendicular to jump run and checking drift against a ground reference (adjacent-column drift is the first solo risk).
• Explain the wind-drift-vs-drive distinction when reading a ground reference: the reference shows the flyer’s own airmass-relative drive plus the common-mode wind drift the whole airmass (and every other group) shares.
  • Only the drive closes the gap toward the next column, so common-mode wind drift is not to be “corrected”, a soloist who flies to stop the ground sliding by must generate real drive into the airmass, manufacturing exactly the movement toward the next group the protocol exists to prevent.
  • The static turn is safe because it references the airmass (the drive integrates out over a continuous closed turn), not the ground.
  • The ground check is for a persistent, direction-locked trend that survives the turn.

Assessment conditions

• Sky jumps from a recommended 10,000 ft minimum.
• Mandatory video of assessment jumps (coach-flown, ground-to-air or tunnel video; candidate identifiable).
• Required equipment, visual altimeter, two functioning audibles for unaccompanied solo jumps, regarded as mandatory best practice (one functioning audible is the regulatory floor on any freefly descent in Australia, the APF Operational Regulations), AAD recommended, freefly-suitable gear per the FFP-F100 gear audit.
• Conditions within the candidate’s cleared limits.

Declare shoulder history before vertical work: the sit-to-head-down transition loads the shoulder joint hard, and the Australian record carries serious cases, a shoulder dislocation that prevented the flyer reaching the BOC (ASM 56 p.74) and torn shoulder ligaments (ASM 83 p.25).

A candidate with a history of shoulder dislocation, instability or reconstruction should raise it with the coach before head-down work so exit presentation, arm position and the recovery sequence can be adjusted, and medical clearance sought where appropriate, a shoulder that cannot reach the BOC is a deployment failure, not just a flying limitation.

Assessor: a freefly coach current in head-down coaching, using the published FFP-HD101 checklist with each criterion marked Satisfactory / Not Yet Satisfactory. Tunnel-route evidence is assessed by a qualified head-down tunnel coach (IBA or equivalent instructional system, noting that teaching techniques vary between systems and that tunnel arm positions may need sky adaptation).

Coaching priorities

Deliver in the project’s priority order:

• Safety → Fun → Learning (curriculum Part A0). Safety-critical standards, the solo protocol (daffy, static turn, two audibles), are never traded for progress or throughput.
• One declared objective per jump keeps cognitive load light and the jump enjoyable.
• Debriefs end on a win with one improvement focus for the next jump.

Physical preparation (era coaching wisdom). Head-down and its precursor positions make specific, sustained demands on the legs and hips, and tunnel blocks (up to ~2 minutes) mean the conditioning that helps is isometric holds, not reps.

• Period Australian coaching (Tracey Lane) recommended, position-specific: isometric wall-sits held up to ~2 minutes to match a tunnel block for head-up/sit endurance, pressing through the heels and targeting the quads rather than the knees.
• Single-leg balance work for asymmetric docks.
• Hamstring bridges for back-fly recovery.
• And toe-dorsiflexion plus hip-flexor work for the daffy and head-down positions (ASM 79 pp.28–29).

Offer this as optional preparation a motivated flyer can do between jump days, it is coaching wisdom, not a gate.

RPL evidence set

For experienced entrants, the following alternative evidence is suggested as satisfying the same criteria:

• Logbook showing solo or coached 2-way head-down jumps (dates, altitudes, coach signatures where applicable).
• Tunnel records at IBA Static Level 4 head-down (or equivalent system standard), including flip transitions from sit (per third-party summaries; verify against IBA source material).
• Video portfolio: a stable neutral head-down position (straddle, daffy or shelf) held on heading, and a tunnel head-down daffy with turns (the FFP-F100 solo-daffy gate).
• One coach-observed challenge jump flown to the FFP-F100 solo protocol and assessed against all criteria on video. RPL does not waive the safety-critical (bold) standards, each must be demonstrated on the challenge jump.

Sources