| By Dave Santos on 27989 Re: Line Gallop and Strum (review and ST shaft context) A
kite cable-drive has its own set of tricky challenges added in. That's
not much power from 7 small rotors, if saving the world is needed. a
twelve foot rotor would be about the same power.
Oh well, lets see if someone actually builds an ST for that altitude range.
On Monday, July 29, 2019 10:28:12 AM CDT, gordon_sp@yahoo.com [AirborneWindEnergy] <AirborneWindEnergy@yahoogroups.com> wrote: Dave, You said: “An ST driveshaft is thick and long, so gallop forces are predicted for turbulent gusty conditions” Consider
a drive train with 7 turbines 5 ft in diameter. The total length
of shafts between these turbines is only about 30 ft long. This
length is only about 3% of a 1000 ft tether since the rest of the
tether is the cable drive. At a 45 deg tether angle the lifter
kite will be at a height of 707 ft. |