YCP10 
PSI10 
PSI1DO 
U10 
V10 
JTTO(1) 
AANGLE1 
THETD1 

2 
Card: Field 
Variable 

Description 
Original Units 
Default Units 
Metric Units 
2:1 
XCP10 
X’_{c10} 
The X' coordinate of the center of gravity of vehicle 1, (V1). The smaller vehicle or the bullet vehicle should be entered as V1. Collision forces are calculated in a clockwise sweep of V1. The force calculations are less accurate in the vicinity of a narrow intrusion; therefore, accuracy is improved when V1 is the smaller vehicle. A fixed Cartesian coordinate system is used, with the positive X' axis shown pointing upward, and the positive Y' axis to the right. Angles are measured clockwise from the positive X' axis. 
inches 
feet 
meters 
2:2 
YCP10 
Y’_{c10} 
The Y'coordinate of the center of mass of V1. (see comments on XCP10). 
inches 
feet 
meters 
2:3 
PSI10 
ψ_{10} 
The heading angle of V1 measured clockwise from the positive X' axis. 
degrees 


2:4 
PSI1DO 
_{} 
The angular velocity of V1. Taken to be positive when rotation is clockwise. 
deg/sec 


2:5 
U10 
U_{10} 
The initial forward velocity of V1. The longitudinal component of the total vector velocity of V1. 
in/sec 
MPH 
m/sec 
2:6 
V10 
V_{10} 
The initial sideways (lateral) velocity of V1 with right taken as positive. 
in/sec 
MPH 
m/sec 
JTTO(1) 

Trailer option indicator. Set = 1.0 for trailer on veh#1; = 0 if no trailer. Note: a msmac run with only 1 vehicle exercising the Trailer option must be with vehicle#1. Please note that msmac input cards 20 & 22 are required for a trailer on vehicle #1. See additional information on Trailer Option and input requirements for Trailer Option 


 
2:8 
AAngle1 
θ_{10}ψ_{10} 
Initial trailer articulation angle with respect to tractor x axis. Note: AAngle1 = THET1=PSI1 
degrees 


2:9 
THETD1 
_{} 
Initial trailer angular velocity. Taken to be positive when rotation is clockwise. 
deg/sec 


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