Delta V Study

Mass Fraction Study PRISM v1.1.7
by: C Taylor May 05, 2018
Mass Summary
System: Mass Fraction Study 900.000 lbm Total
NameMass UnitsType
INERT
Payload Weight 300.000lbminert
Propulsion system 348.866lbminert
PROPELLANT
Propellant 251.134lbmpropellant

Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
System Sensitivity
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Result Variables
NameValueUnitsDescriptionConstrainLimit
deltaV 3000 ft/secDelta V Requirement (ft/sec)---
deltaV_FOM 1 deltaV figure of merit=1
Itot 71573.2 lbf-secTotal Impulse (lbf-sec)---
massFraction 0.418557 Stage Propellant Mass Fraction<0.45
stgPropFrac 0.418557
* ----->		Stage Propellant Mass Fraction
(stgPropFrac varies to make deltaV_FOM = 1 )		>0.0001, <0.999
sysMass 900 lbmTotal System Mass (lbm)---
WtPropAxial 238.577 lbmBurned Axial Propellant (lbm)---
System Sensitivity
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Result Variables
NameValueUnitsDescriptionConstrainLimit
deltaV 3000 ft/secDelta V Requirement (ft/sec)---
deltaV_FOM 1 deltaV figure of merit=1
Itot 71573.2 lbf-secTotal Impulse (lbf-sec)---
massFraction 0.418557 Stage Propellant Mass Fraction<0.45
stgPropFrac 0.418557
* ----->		Stage Propellant Mass Fraction
(stgPropFrac varies to make deltaV_FOM = 1 )		>0.0001, <0.999
sysMass 900 lbmTotal System Mass (lbm)---
WtPropAxial 238.577 lbmBurned Axial Propellant (lbm)---
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variables (nominal values)
NameValueUnitsDescription
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Design Variable Summary
Design Variables (nominal values)
NameValueUnitsDescription
deltaVReqmt 3000ft/secDelta V Requirement (ft/sec)
GLOW 900lbmGross Liftoff Mass (lbm)
Isp 300secEngine Specific Impulse (sec)
pcentACS 5% ACS Propellant of Total
Wpayload 300lbmPayload Mass (lbm)
Result Variables
NameValueUnitsDescriptionConstrainLimit
deltaV 3000 ft/secDelta V Requirement (ft/sec)---
deltaV_FOM 1 deltaV figure of merit=1
Itot 71573.2 lbf-secTotal Impulse (lbf-sec)---
massFraction 0.418557 Stage Propellant Mass Fraction<0.45
stgPropFrac 0.418557
* ----->		Stage Propellant Mass Fraction
(stgPropFrac varies to make deltaV_FOM = 1 )		>0.0001, <0.999
sysMass 900 lbmTotal System Mass (lbm)---
WtPropAxial 238.577 lbmBurned Axial Propellant (lbm)---
Constant Mass: Payload Weight
mass = 300.000 lbm type = inert
Constant Mass: Propulsion system
mass = 348.866 lbm type = inert
Constant Mass: Propellant
mass = 251.134 lbm type = propellant

(PRISM) PaRametrIc System Model
PRISM v1.1.7
contact: C. Taylor, cet@appliedpython.com