Gunbei,
We flew out of Minden, NV (just south of Reno), and flew south to Tinnemaha Dam (around Bishop) and back. Most of the flight was between 15,000 & 18,000 feet from thermals (and oxygen). My 31,000 foot altitude (definitely with oxygen) was on a seperate flight, in wave, just east of Tahoe. Even during the hot summer months of the desert, it was very cold at 31,000 feet. We could see the west coast with no problem.I was flying a 15 M racing sailplane called a Discus B on the 500 KM, 7 1/2 hour flight.
We flew out of Minden, NV (just south of Reno), and flew south to Tinnemaha Dam (around Bishop) and back. Most of the flight was between 15,000 & 18,000 feet from thermals (and oxygen). My 31,000 foot altitude (definitely with oxygen) was on a seperate flight, in wave, just east of Tahoe. Even during the hot summer months of the desert, it was very cold at 31,000 feet. We could see the west coast with no problem.I was flying a 15 M racing sailplane called a Discus B on the 500 KM, 7 1/2 hour flight.