Triangle Control Frame Training (TCF Training)
Since, at least, 1908 (W. Simon), foot-launch battened flexible-wing hang gliders with pilot hanging from parasol wing behind a cable-stayed (or strut-stayed) triangle control frame (A-frame) have speckled hang gliding. Training? This topic thread start suggests that there could be a robust realm of training involving the TCF. And the very training just might be a way to introduce hang gliding to ever more people. So, a profound exploration of this potential realm is invited. Posters are encouraged to see things perhaps missed.
Some of the aspect realms of the TCF Training: 
alternative attachments to base element

alternative attachments to legs

alternatives

angle-of-attack indicator

anti-whack mitigation

apparent wind, wind-of-running, wind-of-flight

attitude of pilot

avoidance of stumbling

avoidance of whacks

bare T

base element designs

base element of TCF

base for limit lines

base for rigging

basis for wing integration

brakes

buddy system

cable-stayed

challenges

checklist

cladding for knees (Why? Sorts?)

clearing.
Clear! 
clothes for the practices

communications

coordination

costs of various TCF training rigs

cousin to aircraft landing carriages

designs

drag and lift of pilot's body and attire and harness

drag of attachments

drag of rigging

drag of TCF

drag of training mini wing

enhancements

extensions

exterior-of-legs

floating TCF

footwear (Why? Sorts?)

functional

futurism

glance

gloves

goggles

grips

habits

handling

hang check (distinguish from hook-in check)

hang loop position, design, length, check, position stabilization, wear, replacement, age recorded,

helmet

history of TCF (early, mid, late, contemporary) Leonardo, Cayley, Pilcher, Wenham, W. Simon, Spratt, John Worth, and others)

hook-in habit, hook-in check, distinguish from hang check,

horizon

hybrid roles

incident study

incidents (head, neck, collar bone, knuckles, fingers, arms, knees, feet)

induced oscillations (pilot or mechanical design; PIO; DIO)

inspection

instrument interface

interior-of-legs

jogs

journal progress

leans

leg design (constant section, spindle, parts joined, material choice, adequacy, role, appliques, secondary purposes, ...)

leg shapes

level practicing

limit lines

mastery of TCF matters

mechanical

meditations

mental processes when practicing

micro hang gliding

mini hang gliding

picking up feet

planned training sessions

practicing

pressures, legs of TCF

procedure

products on the market, storage

queen-post tension dynamics

relative motions of pilot and TCF

review

review by others

rigging interface

rigid tether?

role in hang gliding

rollers

runs

RWW (roller when wanted)
safe-splat interface

safety

shaping

Similarity cases.

site characteristics (soils, plants, rocks, gravel, trees, holes, lumps, valuables, wind character, ...

sites for the TCF training

sizing

skids

skis

slope practicing

social

spatial

streamlining

strides

structural schemes

strut stayed

studies related to hang gliding while the TCF training is occurring

surface treatments

target

taut tether

TCF rigs (variety, simple, medium complex, complex, ... )

test, online written test, test questions, physical test, fitness test, operating test,

tether set

through cable

wheels
The alphabetical aspect list for TCF Training is not complete; we await aspects missed.
Then develop the aspects and the trainer versions and exercises. And experiences and results.
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Some teasing scenarios: Junior high school physical education class. See 30 students each holding and moving with a TCF while training nerves, arms, legs, spatial orientations, eye conduct, procedure following. Interact with an object. Image launching one's flight.
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Invited is the full story on a TCF Trainer version that was part of BobK's Little Hawk story. Minimal, he told me. "Tiny Hawk" I estimate that what he did was at about TCF T4, speculative estimate on a spectrum of TCF T0, T1, T2, T3, T4, T5, T6, ..., T100. We await the story. Others' projects on TCF Trainers are welcome.
