3.1.2 Propulsion Channels (2 identical channels) 
Type — Proportional control of voltage to series-wound propulsion motors. 
Controls — Lever type, zero to full power, forward or reverse. 
Output voltage — 0—150 or 0—300 volts for full range of control lever. (Range 
switch in model equipment.) 
Output current — 10 amperes maximum (rated). 
Output power — 3000 watts maximum at low-duty cycle. 
Stability — Hold selected output voltage to better than + 1 percent for (1) Battery 
voltages between 1.3 volts per cell (full charge) and 0.8 volts per cell at end of run, (2) 
Changes in load from half load to full load. 
Propulsion motor reversing — Automatic with operation of control lever by 
reversing armature connections. 
Propulsion motors — Not supplied, 0—3 hp, 0—300 volts, series wound. 
3.1.3 Model Powering Equipment 
Motor-alternator — 115-volt 3-phase 750-volt-ampere output, 2-percent frequency 
regulation, continuous duty. 
Batteries — 10-ampere-hour and 40-ampere-hour nickel-cadmium batteries, 
34 cells per unit. 
Battery charger — Charging rate adjustable up to 300 amperes at 49 volts d. c. 
Input — 3-phase 600 volts at 60 cycles or 3-phase 480 volts when used with auxiliary 
autotransformer. 
3.1.4 Spare Control Channel 
Type — ON-OFF control through radio link. 
Control — Toggle switch on power control panel. 
Contacts — Single pole — double throw rated at 1 ampere at 24 volts d. c. or 
115 volts a. c. 
Operate time — 0.1 second maximum. 
3.2 READOUT CIRCUITS 
3.2.1 Rudder Channel 
Rudder position (analog) 
Range — 45—0-—45 degrees 
1-6 
