|Mustafa Umut Sarac
Wohnort: Istanbul - Turkey
|Verfasst am: 16.11.2018, 19:00 Titel: 498 mph speed of rc glider /top of wind shear have 10x speed
|I got below phrase from robotic albatross glider papers. If the lower shear line speed is 20 mph , the top of the shear line speed is 10 times faster.
World record in mountain ridge is 498 mph.
Think about 500 mph speed of MTA boomerang.
Wandering albatrosses exploit the
vertical gradient of wind velocity (wind
shear) above the ocean to gain energy
for long distance dynamic soaring
with a typical airspeed of 36 mph. In
principle, albatrosses could soar much
faster than this in suffcient wind, but the
limited strength of their wings prevents
a much faster airspeed. Recently, pilots
of radio-controlled (RC) gliders have
exploited the wind shear associated with
winds blowing over mountain ridges to
achieve very fast glider speeds, reaching
a record of 498 mph in March 2012.
A relatively simple two-layer model of
dynamic soaring predicts maximum
glider airspeed to be around 10 times the
wind speed of the upper layer (assuming
zero wind speed in the lower layer). This
indicates that a glider could soar with an
airspeed of around 200 mph in a wind
speed of 20 mph, much faster than an