user manual

TABLE 3.3-13
SPS PROPELLANT UNCERTAINTIES
Amendment 79
3130170
ITEM
LOADING UNCERTAINTIES
Tank Volume
Temperature Gauge (_2.0°F)
Standpipe Height
Propellant Gauge (±0.35% of Gaugeable)
Density Measurement (i)
Batch Density (I)
Loading Pressure (i)
RSS
TOTAL RSS
Loading Specification (I) (2)
Tolerance on Propellant Temperature
of Flight Load
FUEL
(ib)
±24
_18
± 6
±54
± 5
I 0
± 8
± 63
±124
OXIDIZER
(Ib)
_39
±46
±i0
±86
± 5
0
±14
J_
±107
_0 ±0
-+0 +0
TOTAL LOADING UNCERTAINTY ±124
MISSION UNCERTAINTIES
Mixture Ratio Variation
_V, I Vehicle Weight Variation
sp'
Propellant usage uncertainty due to
total loading uncertainty
TOTAL PROPELLANT UNCERTAINTY FOR
MISSION 8V
+ 65.5
-512.7
+422.2
-419.0
+ 75.9
-132.4
+434.0
-675.3
NOTES:
(1)
(2)
Data will be known after loading is accomplished.
Loading specification is an allowable tolerance about
nominal, this number is added to the loading uncertainty
variables.
3.3 -54
SNA-B-D-027(III)REV 2