Dog Stake Kite Flying
Click image to enlarge
Photo showing a Kite Ship OL being flown from a kPower pilot
station through a kPTO along a crosswind cable-way.
Notice the "dog stake" method of flying; this enables the pilot to easily
relaunch the kite without a long walk. Note also the double drive kite
engine in the foreground.
kPower cc by 3.0
Thanks for the higher resolution imaging Ed... Keep them
It really does help for the rest of us trying to understand the
configuration of terms.
Kite Ship OL (Single skin, 3 line kite seen in green) being flown from a
kPower pilot station (6 Post protected piloting area allowing mechanical
anchoring and control beyond human power) through a kPTO
(Where the kite control lines run through a trolley carriage, The trolley
carriage is free to run on a tight crosswind cableway, the trolley
carriage also tows a power output line parallel to the cableway) along a
Notice the "dog stake" method of flying; (Where the pilot is
downwind of the trolley carriage) this enables the pilot to easily
relaunch the kite without a long walk. Note also the double drive
kite engine (double drive kite engine takes a stroke input from 2
directions as demonstrated on youtube) in the foreground
Dave S ... you mentioned in another post...
If xxxxx was wise to the real challenges of AWE R&D, he would worry about
our team safety; advising us not to hurry, rather than unfairly
complaining that Mothra validation is unfinished. Scaling-up pioneering
AWE methods to utility-scale is slow dangerous work. xxxxx can speed it up
by helping solve the challenges, ...
And I'm going to share a few safety concerns of my own.
I like how the dog tie method compresses the footprint of AWES land
coverage. There are a couple of obvious safety points to dislike about it
1 The pilots are sitting downwind of kite tensioned gear. Neither of you
looks comfortable nor assured.
2 This method effectively doubles the line tension acting on the cableway
trolley carriage. Two sets of tensed kite lines around the pulleys pulling
downwind. Some of the single point failure modes I can imagine would be
In the mix of demands from footprint and streamtube efficiency
I'm sure we can find schemes with safer working and as efficient wind
The idea of driving a large circular cableway or driving on a large
circular cableway, obviously improves weathercocking ... but leaves little
room for generation stroke given the demands on the flight window and the
A mix mix of system ideas may end up looking
like this [weathercocking
with a dual stroke takeoff]
A short control board shuttling across a broad segment of a circle.
Carriage mounted pulleys at the extremes of segment and a minimal 1 more
carriage at the upwind tether are linked to ride on the circle as
weathercocking dictates. Power take off is in the centre, driven by the
board pulling a light tensed rope loop through the pulleys.
Most of my schemes now come down to having a good linked set of tube
riding cuffs (or rail riding carriages) on a stretched circle.
CC3.0 NC BY SA
Windswept and Interesting Limited
Isle of Lewis
Comment and development of this topic will be occurring here.
All, send notes, links, drawings, papers, videos, plans, safety-critical
findings, and photographs!
- Terms and aspects:
- Related links and concepts:
- Commentary is welcome:
Hold on a second,
Boy Santos! DaveS had written:
"Somebody soon show how the tensile circular track works in some
quickie demo, since its not COTS, nor proven like the basic compass
belay. Its surely doable, but does not seem to exist, unlike all the
Rod Read alerts a counter:
"Why not just use a rotary overhead crane upside down. or any other
annular extrusion with force-angle handling properties and a suitable
carriage for that matter.
We are now fully COTS again! Or if you want it
pre approved, rated for human safety, and COTS: Roller
coaster track sections and minimal carriages.
Suitably engineered "roller coaster track" would work, but its not
pure-COTS cheap; it would be a major cost, far more than just a circle
of anchor-points. Let NTS solve this one for us.
A rotating or fixed perimeter cable for snatch-blocks would be
cheaper. The rocker bogie rollers that cableways use are like snatch
blocks, as an industrial solution. The arch anchors would be secured
to swaged points with J-hooks, as cable-cars attach. A rotating cable
circle can be bull-wheel driven.
We are still short a dirt-cheap bench-top prototype version of a
"Lazy-Susan" kite farm turret. Look to curtain tracks for a start.
kPower has looked at utility-door roller-hangers, as a next
scaling-step option; the track can be bent, and the attachment
hardware is varied.