Controls, first use of (cont'd.)
fixed needle-valve ballast leakJl
fixed orifice ballast leak, ~ --
minimum-preuure swi toh w1 thauto-
matic ballast valve, 12
rate-of-ascent ballast sirtoh, 97
rate-of-ascent ballast switch --
combined with displacement
switch, 102
superpre81uri; 23
lifter balloons, r. 7
1olid ballaat, 5, 1
superpressure, 23, 38, 59, 63, 66,
79, 87' 94-
typioal flight with
auto•tic ballaat valn, 92
fixed ballast leak, 82
rate-of-ascent ballast switch
combined with displacement
switch, .!2!.
Deformation of air flow over mountain
range, 11
Destruction device
first use of, 10
first use of new design (ri~-out
principle), ~. (Fig. 16)
Dewey and A~, shrouded rUbber
balloons, ~. 38, 66, 87
Drop sonde, .!!2_
Easterly winds at high levels, 60, 75
Fixed-leak ballast control
first use of, 11
typical flightwith' 82
Flight patterns, typical
with polyethylene balloons and
automat!~ ballast-valve control,
92
with polyethylene balloODa and auto-
matic ballast-valve control
thru a sunset, 90, 92
with polyethylene balloons and
fixed flow of ballast, 82
.Fl.irllt pattenss, :f;ypical loont'd.)
wrth rubber balloons and 1ncreJilbt
ballast loss, 5, 7
Geoetrpphic air flow, compared with
balloon trajectories, 55, 58, 106, 110
Lange barograph
first use of, 52
longest record-or, 75
Litter balloons for altitude control, 5, 7
lleteorograph, Fergusson, ~· 35, 39
Minimum-pressure switch
tailures due to freezing of, 78, 80
first use of, 12
need for, demoiiitrated, 11
Olland-cycle pressure modulator, use of,
~· 52, 55, 68, 73, 97, 98
Oscillations- in the atll.osphere, 10., 62,
65, 58, 63, 71
Polyethylene balloons
7'-diameter, ''• 76, 86, 86
30 1 -diameter,""T02
15 1 -diemeter, W
20'-diameter, !l, 17
70' -diameter, !!
Preasure-measuring instruments
barograph, 3:S
Lange barogii'ph, 52
Olland-o~le modulator, .!!• 52, 56, 58,
73, 97, 98
Program. switch, use of, !,2!
Radar tracking, '15. 86
Radio direction-finding
airborne, .!!.• 103, 110