Apollo 204 Review Board Appendix C Section 2 - NASA's History ...

_rometric Pressure indicator
(AIHrneter)
5M2A-03-sC01 2
APOLLO OPERATIONS HANDBOOK
PERFOR.V_ANC E
NOI:E!
The 9_een band on the
L/V AOA 'SPS Pc ;nd[¢ator ,
shows nolmal operot;ng
pressures (65 to I 25%) for the
$PS combustion chombet
during engine opetot;on
in space flight.
L'V AOA. SPS PC h_d,cc.o,
Figure _- L. Sequential System Indicators
SM- 2A- 700F
on barometric pressure, is set prior to launch, (Refer.to paragraph
4.4.2 " for altimeter error and C/B base pressure effects.)
NOTE The accuracy of the altimeter is +i00 _ "
- _ee_
from. 0 to 4000 feet and 5 percent of the altin:eter
reading from 4000 to 60,000 feet.
L/V AOA/SPS P_ Indicator.
The L/V AOA/SPS Pc indicator, on MDC-3 (figure 4-11.), is
used to display the launch vehicle angle of attack (in _er_
centage of pressume from the Q-ball) durin_ launch. After
launch vehicle separation from the S/C, the gauge i_ used to
display SPS combustion chamber pressure during'engine o_erztior..
Inputs to this time-shared gauge are determined by the position
of the L/V AOA/FPS Pc _witch, located on the ::m_.eFanel.
NOTE The accuracy of the L/V AOA/P c indicator (for the
full scale) is 1 percent at 75°F and 2 _ercert at [° an l
150°F.
...ISC_LLAN_O_ I.,.ICA.0Ro.
Instr_-..ent markings for mechanically operated irdicators
such as clocks, timers, and an accelerometer are sho_._ _r.
figure _-[_' and described in Far.graphs ::.L.7".L throu