For the coiled/uncoiled helical shaft idea you’d maybe use a channel and mating surfaces for the coiled state and a channel and mating surfaces for the uncoiled state. Assuming you can do no more than 4 or 5 wraps before the friction inside the dominoes becomes too much, or you’d have to use more motors along the length of the shaft, the length of the uncoiled shaft would be optimistically limited to something like 5 times the circumference of the ground station rotor, so perhaps 150 meters for a 10 meter diameter rotor.
If you don’t use these internal channels to coil and uncoil the dominoes, instead using the kites to unreel the tethers from a drum for example, that particular limit probably goes away.
Ignoring the shaft, a nice image of a ground station with segmented blades would be like a weeping willow when there is no wind and then when the wind picks up the branches slowly stiffen, start rotating, and take off. Or they don’t necessarily need to take off. Or maybe the image of a flower bud opening is also good.
Related: Would blades inspired by palm trees be suitable to AWES?
Maybe related: FROW - The first rotary-wing drone that changes its wingspan mid-air
Also for transforming or folding wings for example. You could have a motor that tensioned a number of lines when it rotates one way, and tensions different lines when it rotates the opposite way. Or it can just tension and untension lines. You’d probably use a latch so that it doesn’t have to be holding the tension constantly.