roswell

of displacement switch actions alone.
...0
:::>
...
IF LEVELING OFF TOO LOW, H.IGH
BALLAST RATE PUSHES BALLO.ON
INTO CONTROL ALTITUDE.
CASE "A"
, ~;;;-"' ~ -- -- -- -- -- -- -- ---- - -
... -~TOOL~' -- ,..-, ,--..
~ -~ASE "a"---.;;..;._~--
IF LEVELING OFF TOO HIGH
----- ---- _ _Lw:!BA:~A~T-U~T~ TH~~!~ME.
I ______l ____l ____ I ______ I_---=~~---_-
NORMAL 8ALLAST FLOW- CASE "A"
~~---------------~=-~~~~==-----:~:.:To~:l'i.L:~~SE aAI.!,AST FLOW- CASE "a" !RATE SWITCH FAILUREl-
TO INDICATIE PROPER
CONTROL ACTION. (!) PEN OFF SHELF
TIME
@ TOP LOW ALT. COMMUTATOR
@ aOTT. HIGH ALT. COlliN.
Figure 15. Theoretical height-time curve.
(4) Rate-of-Descent Switch
It may at times be desirable to control a balloon merely qya
switch activated at any given rate of descent. This could be
accomplished merely by "reversing" the rate-of-ascent switch.
This type of control would prove to be quite difficult, however,
for a constant level flight. One flight, No. 97, was made
using a type of rate-of-descent switch ·&s shown in Figure 16. In
...---------------------------------1
I
I Pos1tron whrle-,-~--------
rrsrng ..: ----------
1 AdJustable \_ Posrtron whrle
I Contact --...... ---, Descendrng
I I
I !I
L __ _ ' Ballast I'\_Solenard 1
1
Valve !
I I
L_~'l'l'l~~
Sealrng Valve
(Actuated at
de11red altrtude)
Figure 16. Rate-of-descent switch.
Coprllory
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