True Airspeeds

 True Airspeeds

These true speed indicators are differential pressure indicators that measure the difference between static and total pressure produced by ram air from the pitot. The indicated airspeed can be corrected for changes in altitude by turning the knob to align the outside air temperature with the altitude. The moveable airspeed scale will then show the actual, or true, airspeed.
  • Options
  • EA5174-PTL Specs
  • EA5175-PTL Specs
  • EA5176-PTL Specs
Physical Characteristics
Dial 1
EA5174-PTL front view
EA5174-PTL rear view
General
Height:
3.25"
Width:
3.25"
Depth:
2.40" (max)
Weight:
0.8 ± 0.1 lbs.
Nomenclature:
Matte white
Dial Face:
Flat black
Typical Range (see Note 3)
Outer: 40 to 200 MPH
Inner: 40 to 170 Knots
Range Markings (see Note 3)
White Arc:
0.10" wide
Green Arc:
0.10" wide
Yellow Arc:
0.10" wide
Red Line:
0.03" x 0.275"
Notes:
  1. Designed to meet the requirements of FAA TSO-C2b for a Type II instrument.
  2. Internally lighted models available (see options).
  3. Customer specified range and markings.
Dials Available
Dial 2
Dial 3
  
EA5174-PTL dial 2
EA5174-PTL dial 3
  
40 to 200 MPH
35 to 170 Knots
  
Environmental Characteristics
Temperature: -30° to 50° C
Vibration:  
- CPS: 5 to 50
- Maximum Double Amplitude: 0.020 in.
- Maximum Acceleration: 1.5 G's
Humidity: 0% to 95% at 32° C
Altitude: 0 to 40,000 ft.
Physical Characteristics
Dial 1
EA5175-PTL front view
EA5175-PTL rear view
General
Height:
3.25"
Width:
3.25"
Depth:
2.00"
Weight:
0.8 ± 0.1 lbs.
Nomenclature:
Matte white
Dial Face:
Flat black
Typical Range (see Note 3)
Outer: 40 to 210 Knots
Inner: 40 to 240 MPH
Range Markings (see Note 3)
White Arc:
0.06" wide
Green Arc:
0.12" wide
Yellow Arc:
0.12" wide
Red Line:
0.06" x 0.25"
Notes:
  1. Designed to meet the requirements of FAA TSO-C2b for a Type II instrument.
  2. Internally lighted models available (see options).
  3. Customer specified range and markings.
Dials Available
Dial 2
Dial 3
EA5175-PTL dial 2
EA5175-PTL dial 3
40 to 240 MPH
40 to 210 Knots
Environmental Characteristics
Temperature: -30° to 50° C
Vibration:  
- CPS: 5 to 50
- Maximum Double Amplitude: 0.020 in.
- Maximum Acceleration: 1.5 G's
Humidity: 0% to 95% at 32° C
Altitude: 0 to 40,000 ft.
Physical Characteristics
Dial 1
EA5176-PTL front view
EA5176-PTL rear view
General
Height:
3.25"
Width:
3.25"
Depth:
2.00"
Weight:
0.8 ± 0.1 lbs.
Nomenclature:
Matte white
Dial Face:
Flat black
Typical Range (see Note 3)
Outer: 40 to 260 Knots
Inner: 40 to 300 MPH
Range Markings (see Note 3)
White Arc:
0.06" wide
Green Arc:
0.12" wide
Yellow Arc:
0.12" wide
Red Line:
0.06" x 0.25"
Notes:
  1. Designed to meet the requirements of FAA TSO-C2b for a Type II instrument.
  2. Internally lighted models available (see options).
  3. Customer specified range and markings.
Dials Available
Dial 2
EA5176-PTL dial 2
40 to 260 MPH
Environmental Characteristics
Temperature: -30° to 50° C
Vibration:  
- CPS: 5 to 50
- Maximum Double Amplitude: 0.020 in.
- Maximum Acceleration: 1.5 G's
Humidity: 0% to 95% at 32° C
Altitude: 0 to 40,000 ft.