Profaa update
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ProFAA Update. Airport Pavement Working Group. Gordon Hayhoe, ANG-E262. Sheraton Atlantic City Convention Center. April 25, 2012. ProFAA Outline. New straightedge modes. Band-pass filter change. New zoom mode. Translation to VB.NET 2010 .

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ProFAA Update

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Profaa update

ProFAA Update

Airport Pavement Working Group

Gordon Hayhoe, ANG-E262

Sheraton Atlantic City Convention Center

April 25, 2012


Profaa outline

ProFAA Outline

  • New straightedge modes.

  • Band-pass filter change.

  • New zoom mode.

  • Translation to VB.NET 2010.

  • Pilot subjective ratings and ride quality index Skip Hudspeth, Cherokee CRC.


Straightedge modes

Straightedge Modes

The length of all straightedges can be varied up to 1,500 ft (457 m) by the user

The cutoff wavelengths of the band-pass filter can be changed to any values by the user


Physical straightedge

Physical Straightedge

The straightedge sits on the two highest support points under the straightedge.

Type 1 = maximum deviation is measured along the full length of the straightedge. This is the FAA standard.

Type 2 = maximum deviation is measured between the supports. Usually smaller than for type 1.


Rolling straightedge

Rolling Straightedge

The ends of the straightedge are both at the same vertical elevation relative to the profile. The straightedge is translated to sit on the profile and the maximum deviation is measured along the full length of the straightedge

The straightedge can cut the profile

Computer simulation

Maximum deviation is measured along the full length of the straightedge.

Practical implementation


Two wheel profilograph

Two-Wheel Profilograph

The ends of the straightedge are both at the same vertical elevation relative to the profile. The straightedge is translated to sit on the profile and the deviation is measured at the center of the straightedge

The straightedge can cut the profile

Computer simulation

Deviation is measured at the center of the straightedge.

Practical implementation


Simultaneous zoom on all pictures

Simultaneous Zoom on all Pictures


Translation to vb net 2010 windows presentation foundation

Translation to VB.NET 2010 – Windows Presentation Foundation

  • User interface about 80% complete.

  • Now transferring the calculation code from the VB 6.0 implementation.


Wpf user interface main window

WPF User Interface – Main Window


Cockpit ride quality

Measure profile and import into ProFAA

Compute vertical cockpit acceleration for a selected aircraft simulation in ProFAA

Filter the cockpit acceleration signal in ProFAA and compute an objective roughness index from the filtered acceleration

Compute a pilot ride quality rating from an established correlation between subjective pilot rating and objective roughness index

Input the ride quality rating into a pavement management database

Cockpit Ride Quality


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