Index
(All references are to flight numbert. The number of the flight on which a
particular instrument or principle wa~ first demonstrated is underlined.
For example, airborne radio direction finding was first used on Flight 41.)
Adiabatic temperature changes, 60, 75,
94
Airborne radio ~irection•finding, 41,
•103, 110 -
Airoratt tracking, 5, 7, 11, 12, 13-
20, 86, 108
Air flow
deformation of, over moUf1ta1n
range, ll
geostrophic, compared with balloon
trajec toriea, 55, 58 • 106, llO
Altitude sensitivity, 52, 82, 86, 110
Appendices (external) on polJ'Ithylene
balloons
first use of, 13
need for, demoilstra ted, lZ
stiffened with cardboa~. 20, 39
stiffened with metal, .!! -
Arrays of rubber balloons
cluster, 7
linear, 6
Atmospheric oscillations, 10, 52, 55,
58, 63, 71
Automatic P&llast valve
effect of superheat on, 10, 74, 80,
92
first activated by minimum-pressure
nitch, 12
first use or, 5
sunset effect on, 80, 90, 92
typical f'light with, 92
Ballast meter
need f'or, demonstrated, 29-39
use of, 74, 78, 80, 86, 89, 90, 92
94, 9'6."102
Ballast requirements
with .ool", 7'-diameter poly•
ethylene balloons, 74
with .cxn•, 20'•cU.ameter pol-7-
ethylene balloons, 64, ae. 60,
80, 92, 106
68
Ballast requirements (oont'd.)
with .oos•, 15 •-di...._r polyethylene
balloCD, ll
with Seytanc balloCIIl, 94
Balloons
flights using other than pol,.thylene
neoprene-coated nylon (Seyfan!),
59, 63, 79, 94
rubber, 5, 7
shrouded rubber (Dewey and Alley'),
23, 38, 66, 87
fl~ghts using polyethylene
.001",7'-diameter, 74
.001",20'-diamster,~
.001",70'-diamster, W
.001",30'-diameter, 102
.004",20'-diameter, W
.oo8",15'·diameter, ~
Barograph
longest record ~f, 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
1' -diameter polyethy.iene balloons
in the troposphere, 86
20'-diameter polyethylene balloons
in the stratoJphere, 60, 96
20'-diameter polyethylene balloons
in the troposphere, 70, 71, 88,
93, 98
70'-diameter polyethylene balloons
in the stratosphere, 76
Combination control (rate of ascent ballast
switch with displacement switch)
first use of, 102
typical flight~th, 106
Controls
first use of
automatic ballast valve, 5