Index
(All references are to flight number $ \varepsilon $ . The number of the flight on which a particular instrument or principle was first demonstrated is underlined. For example, airborne radio direction finding was first used on Flight 41.)
Adiabatic temperature changes, 60, 75, 94
Airborne radio direction-finding, 41, 103, 110
Aircraft tracking, 5, 7, 11, 12, 13- 20, 86, 103
Air flow
deformation of, over mountain range, 11
geostrophic, compared with balloon trajectories, 55, 58, 106, 110
Altitude sensitivity, 52, 82, 86, 110
Appendices (external) on polyethylene balloons first use of, 13 need for, demonstrated, 12 stiffened with cardboard, 20, 39 stiffened with metal, 75
Arrays of rubber balloons cluster, 7 linear, 5
Automatic ballast valve effect of superheat on, 10, 74, 80, 92 first activated by minimum-pressure switch, 12 first use of, 5 sunset effect on, 80, 90, 92 typical flight with, 92
Ballast requirements (cont'd.)
with .008", 15'-diameter polyethylene
balloon, 11
with Seyfang balloon, 94
Balloons
flights using other than polyethylene
neoprene-coated nylon (Seyfang),
59, 63, 79, 94
rubber, 5, 7
shrouded rubber (Dewey and Almy),
23, 38, 66, 87
flights using polyethylene
.001", 7'-diameter, 74
.001", 20'-diameter, 12
.001", 70'-diameter, 75
.001", 30'-diameter, 102
.004", 20'-diameter, 17
.008", 15'-diameter, 10
Barograph
longest record of, 75
need for, demonstrated, 17, 29, 30, 32
use of (Fergusson), 33, 35, 39
use of new model (Lange), 52
Buoyancy
changes in, due to sunset, 75, 90
natural
Seyfang balloons in the troposphere, 79
7'-diameter polyethylene balloons
in the troposphere, 86
20'-diameter polyethylene balloons
in the stratosphere, 60, 96
20'-diameter polyethylene balloons
in the troposphere, 70, 71, 88,
93, 98
70'-diameter polyethylene balloons
in the stratosphere, 75
Ballast meter need for, demonstrated, 29-39 use of, 74, 78, 80, 86, 89, 90, 92 94, 96, 102
Ballast requirements with .001"，7'-diameter poly ethylene balloons,74 with .001"，20'-diameter poly ethylene balloons,54,56,60, 80,92,106
Combination control (rate of ascent ballast switch with displacement switch)
first use of, 102
typical flight with, 106
Controls
first use of
automatic ballast valve, 5