Data from the old Schweizer "Red Book" training manual

This book contianed a table depicting the amount of lift produced by
an empty glider with the tail on the ground and the tail up on a stand
in the tiedowns.

Could someone provide me with these #'s?

Thanks, Mark

On Dec 23, 5:40*pm, " wrote:
This book contianed a table depicting the amount of lift produced by
an empty glider with the tail on the ground and the tail up on a stand
in the tiedowns.

Could someone provide me with these #'s?

Thanks, *Mark

Which aircraft Mark? I see figures at the end of both the 2-33 and
1-26 manual but they only depict the lift and net lift in the tail
down position.

On Dec 23, 5:40�pm, " wrote:
This book contianed a table depicting the amount of lift produced by
an empty glider with the tail on the ground and the tail up on a stand
in the tiedowns.

Could someone provide me with these #'s?

Thanks, �Mark

In my old Schweizer Soaring School Manual (SEP 1978 printing) they
show both the 2-33 and the 1-26 lift numbers for tiedown in normal
(tail on the ground) position, I don't see the "tail in the air on a
stand" numbers, although the book illustrates and recommends the
technique.

For the 1-26 the numbers are as follows (tail on ground). The 2-33
numbers are about 40% greater.

The 1-26 empty weight is given as 380 pounds.

30 mph wind, lift is 545 pounds, net lift is 165 pounds
40 mph 945 565
50 mph 1,455 1,073
60 mph 2,100 1,730
70 mph 2,880 2,500
80 mph 3,420 3,040

Like my father, I collect old soaring books and refer to them often.
Many of the modern books ignore some of the basics, like securing an
aircraft and how to make a proper knot.

I saw my father's LK-10A sailplane blown out of substantial tiedowns
in a storm at the 1963 US Nationals in Elmira, NY. At 12 years old,
it made quite an impression on me, and from then on Dad and I always
put his new Open Cirrus in the trailer every night. Once you learn
how, it goes into the trailer almost as fast as tieing it down, and
you sleep better when you hear the distant rumblings of a nighttime
thunderstorm, or hail on the roof.

Burt
Marfa, west Texas
www.flygliders.com