Maximum
Airspeed 
V max
180 mph 
For fullscale vehicles
at 0°
yaw (A=27 ft^{2}, CD = 0.3, L = 18 ft) 
Maximum Air
Temperature 
T max = 75°F

Air temperature can be
at 75°F at all tunnel air speeds
(ASHRAE 1% day) 
Airspeed
Set Point 
0.25 mph
V SP
+0.25 mph 
Average over
a 300 second time period 
Airspeed
Stability 
V
0.30 mph, (1σ)

Standard
deviation over a 300 second time period 
Temperature
Set Point 
1°F
DT SP
+1°F 
Average over
a 300 second time period 
Temperature
Stability 
T
1°F, (1σ) 
Standard
deviation over a 300 second time period 
Total
Pressure Uniformity 
PT/q 0.30%, (1σ) 
Standard
deviation of the measurements within the
test plane 
Static Pressure
Uniformity 
PS/q 0.60%, (1σ) 
Standard
deviation of the measurements within the
test plane 
Flow Angularity
Uniformity 
&
0.25° (1σ)

Standard
deviation of the measurements within the
test plane 
Longitudinal
Turbulence Intensity 
u’/U
0.40% 
Average of
measurements within the test core; frequency range of 10 to 10,000 Hz 
Speed
Deviation in vicinity immediately above
the RR belt (Boundary Layer) 
│UU∞│ ∕ U∞
4% for
02” above belt
│UU∞│ ∕ U∞
0.5% for
210” above belt 
Above belt
on the belt centerline at the test plane 
Acceleration /
Deceleration Rate

V Rate
30 seconds 
0 to 180 mph in
30 sec
180 to fan stop in
30 sec 