XCP20 
YCP20 
PSI20 
PSID20 
U20 
V20 
JTTO(2) 
AANGLE2 
THETD2 

3 
Card: Field 
Variable 

Description 
Original Units 
Default Units 
Metric Units 
3:1 
XCP20 
X’_{c20} 
The X' coordinate of the center of gravity of vehicle 2, (V2). 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 
3:2 
YCP20 
Y’_{c20} 
The Y'coordinate of the center of mass of V2. (see comments on XCP10). 
Inches 
feet 
meters 
3:3 
PSI20 
ψ_{20} 
The heading angle of V2 measured clockwise from the positive X' axis. 
Degrees 


3:4 
PSID20 
_{} 
The angular velocity of V2. Taken to be positive when rotation is clockwise. 
deg/sec 


3:5 
U20 
U_{20} 
The initial forward velocity of V2. The longitudinal component of the total vector velocity of V2. 
in/sec 
MPH 
m/sec 
3:6 
V20 
V_{20} 
The initial sideways (lateral) velocity of V2 with right taken as positive. 
in/sec 
MPH 
m/sec 
3:7 
JTTO(2) 

Trailer option indicator. Set = 1.0 for trailer on veh#2; = 0 if no trailer. Note: Vehicle #2 can only use the Trailer option if vehicle#1 also has a Trailer. Please note that msmac input cards 22 & 23 are also required for the Veh 2 trailer option. See additional information on Trailer Option and input requirements for Trailer Option 



3:8 
AAngle2 
θ_{20}ψ_{20} 
Initial trailer articulation angle with respect to tractor x axis. Note: AAngle2 = THET2PSI2 
degrees 


3:9 
THETD2 
_{} 
Initial trailer angular velocity. Taken to be positive when rotation is clockwise. 
deg/sec 


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