Flight #: 6 — AIRSPEED IN-FLIGHT ACCURACY CHECK

Pilot:

Date:

Time:

Objectives:

  • Determine accuracy of the airspeed indicator throughout a range of airspeeds

Check

Action

   
   
 

Determine altitudes at which you desire airspeed data.

   
 

DEPARTURE

 

Do not use flaps

 

Climb out at 110 MPH

 

Climb to 2000’ MSL and level off

   
 

CRUISE

 

Limit prop RPM to 1700

 

Check engine gauges especially CHT and Oil Temp

 

Trim hands off level flight

 

Set Mixture

   

NOTES

When you fly the three ground tracks for each power setting the IAS should be exactly the same. If not, make sure you're at the exact same altitude and just be patient --- sometimes it takes a few minutes for the airspeed to settle after a turn and a few burbbles.

Check

Action

   
 

1700 RPM, constant altitude - 5500 MSL

 
  • Record OAT
 
  • Record MAP
 
  • Fly ground track 360
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 180
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 90
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Record ground track from GPS
   
   
   

NOTES

Altitude: 5500 MSL

Throttle: 1700 RPM

360

180

90

OAT

MAP

IAS

Ground Speed

 

 

Check

Action

 

Set power 2000 RPM, constant altitude - 5500 MSL

 
  • Reset Mixture
 
  • Record MAP
 
  • Fly ground track 360
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 180
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 90
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
   
   
   
   
   

NOTES

Altitude: 5500 MSL

Throttle: 2000 RPM

360

180

90

MAP

IAS

Ground Speed

 

Check

Action

 

Set power 2400 RPM, constant altitude - 5500 MSL

 
  • Reset Mixture
 
  • Record MAP
 
  • Fly ground track 360
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 180
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 90
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
   
   
   
   
   

NOTES

Altitude: 5500 MSL

Throttle: 2400 RPM

360

120

240

Manifold Pressure

IAS

Ground Speed

 

Check

Action

 

Set power 2600 RPM, constant altitude - 5500 MSL

 
  • Reset Mixture
 
  • Record MAP
 
  • Fly ground track 360
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 180
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
 
  • Fly ground track 90
 
  • Record IAS from airspeed indicator
 
  • Record ground speed from GPS
   
   
   
   
   

NOTES

Altitude: 5500 MSL

Throttle: 2600 RPM

360

120

240

Manifold Pressure

IAS

Ground Speed

 

Check

Action

   
   
 

POST FLIGHT

   
 

Prepare corrective action list

 

Record fuel and oil consumption

 

Calculate True Airspeeds using the attached Excel Spreadsheet (True Airspeed Calculator)

 

Update Aircraft Operations Manual

   
   
   
   
   
   
   
   

NOTES

 

By using the attached Excel Spreadsheet, your ground track does not have to be exactly on the cardinal heading. If it isn't, record the ground track you did have on the spreadsheet.

 

What you're testing is the accuracy of your airspeed indicator. Consider doing this test at close to stall speeds w/ & w/out flaps to get an idea of your TAS for stall speed.