Index
(All references are to flight numbers. 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
Atmospheric oscillations, 10, 52, 55, 58, 63, 71
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 meter
need for, demonstrated, 29-39
use of, 74, 78, 80, 86, 89, 90, 92, 94, 96, 102
Ballast requirements
with .001", 7'-diameter polyethylene balloons, 74
with .001", 20'-diameter polyethylene balloons, 54, 56, 60, 80, 92, 106
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
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
68