“Twin Kite TRPT System”

[PierreB]

Slow Chat III

A variant of Tiira or The Pyramid where the ground station includes a robust tilted wind turbine instead of levers, to increase the torque or/and to provide a longer range: [Gliders transferring torque to a tilted rotor acting the generator]

I put again the sketch:

The title of this topic was suggested by @gordon_sp after a few comments from my idea reproduced above with a sketch.

@gordon_sp

I think we definitely need a new topic. Let’s call it : “Twin Kite TRPT System”.

And also:

@Rodread

Why is this in “slow chat”?

I take the suggestions into account with the present topic.

I also report other reflections by the same authors with my replies:

@gordon_sp

How do you wind/unwind for launch and land?

@PierreB

The blades are robust to handle the huge tensions, making them thick enough to hold a winch inside each one, or in the hub.

@Rodread

Maybe the rotation of the kite and line combo will be slower than the rotation of the standard blades

@PierreB

Both should have the same angular speed. It will be assumed that gliders are faster than the thick blades of the wind turbine on the ground, benefiting also from a higher average wind speed. As a result the kites could sweep much more space. The control would allow the angular velocity of the whole to be adjusted.

The idea is simple: using the tilted carousel as a tilted wind turbine. Said wind turbine can have some lift but it is not mandatory. For a more or less equivalent material quantity, perhaps some power (not much) and above all much torque could be added with fat and robust blades rotating at a low TSR of 2 or 3 to allow the gliders sweeping a large wind area. The additional torque by the ground-based wind turbine could help the flying gliders or rotors to act the ground-based generator, with the potential to increase the range and the swept area.

Another variant with a rotor instead of gliders, leading to a possible train of rotors:

The ropes between the rotors could perhaps be spiral ropes to vary the length according to the phases of work.

[PierreB]

@tallakt

The TSR of a HAWT is 6-8 [source chatgpt] so I expect the glide ratio of kite and tether to possibly go above 10, meaning that this idea is past the most obvious hurdle on paper being that the blade and kites don’t want to move at the same synchronized speed.

The TSR of the ground-based tilted wind turbine as a carousel would be low, for a relatively high torque and a low power, as specified in a previous comment.

@PierreB

The idea is simple: using the tilted carousel as a tilted wind turbine. Said wind turbine can have some lift but it is not mandatory. For a more or less equivalent material quantity, perhaps some power (not much) and above all much torque could be added with fat and robust blades rotating at a low TSR of 2 or 3 to allow the gliders sweeping a large wind area. The additional torque by the ground-based wind turbine could help the flying gliders or rotors to act the ground-based generator, with the potential to increase the range and the swept area.

[Rodread]

You can have a high TSR but if your path annulus is huge it’s a low rotational speed
similarly
a small turbine with a low TSR can have a high rotational speed