Tunnel Specifications:

Nozzle Velocities and Dimensions:
	Small Nozzle	4 to 100 mph		6 to 160 km/hr
		8.2 ft wide x 6.9 ft high		2.5 m wide x 2.1 m high
	Large Nozzle	4 to 45 mph		6 to 70 km/hr
		9.8 ft wide x 11.4 ft high		3.0 m wide x 3.5 m high
Tunnel Dimensions:
	Maximum Distance from Roll to Small Nozzle	19.3 ft		5.9 m
	Maximum Distance from Roll to Large Nozzle	33.5 ft		10.2 m
	Test Section Length	45.5 ft		13.9 m
	Entrance Height	12.1 ft		3.69 m
Climatic Simulation:
	Temperature Range	-40 to 120 °F		-40 to 50 °C
	Rate of Temperature Change (average)	10 °F/hr		5.5 °C/hr
	Humidity Range	up to 95 %RH		up to 95 %RH
	Solar Simulation	320 BTU/hr ft² max. intensity		1.0 kW/m² max. intensity
		over a 160 ft² surface		over a 15 m² surface
Chassis Roll Dynamometer:		Rolls move horizontally and vertically to accommodate front
		or rear wheel drive and tandem axle trucks
	Maximum Power	400 hp @ 30 mph		298 kW @ 48 km/hr
	Maximum Speed	100 mph		160 km/hr
	Maximum Tractive Force	5000 lb		2270 kg
	Maximum Axle Load	20000 lb		9080 kg
Water Brake Dynamometer:		Mounts between truck frame rails and couples to driveshaft
	Maximum Power	1000 hp		746 kW

Data Acquisition and Instrumentation Specifications:

General	• Scan Rate:  20 scans / min
	• Log Rate:  2 samples / min (typical), 20 samples / min (maximum)
	• Windows-based software for planning tests, for controlling and monitoring the tunnel and
	vehicle, and for reporting results
	• Easy switching between English and metric units on screen and in files/printouts
	• Up to 30 calculated "channels", updated every scan and logged with data
	• Results provided as hardcopy, and/or in Microsoft Excel or Lotus 1-2-3 formats,
	on CD or via e-mail
Temperature	• Up to 140 thermocouple channels, chosen from selections below in banks of 16
	• Up to 140 Type K	• Up to 80 Type T	• Up to 64 Type J
	• Grounded or ungrounded junctions
Pressure	• Transducers for measurement of gage, differential, and vacuum
	• Twelve ranges from 1 to 5000 psi (7 to 34467 kPa)
	• Up to 28 pressures measured simultaneously
Flow	• Turbine flowmeters for measuring flow of coolant, refrigerant and transmission fluid, etc. in
	lines from 3/8” to 2” (10 to 51 mm) diameter and flow ranges from 3 to 150 gpm (11.4 to 568 l/min)
	• Up to 4 flows measured simultaneously
RPM	• 4 channels of rpm measurement (infrared reflective fiberoptic) for fan(s), engine, driveshaft, etc.
Voltage and Current	• 8 isolated channels, individually configurable to measure DC voltage (to 50 V) or current (to 50 A),
	for fans, blowers, etc.  DC power supplies for vehicle systems up to 60 V
Fuel Flow	• Diesel fuel supply system incorporates mass flow measurement to 200 lb/hr (91 kg/hr)
	to permit verification of engine operating conditions.