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Radalt and bank angles


Puma
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It is an observed behaviour that from level flight, the radar altimeter switches to XXXXR at approximately 35 degrees of bank in either direction.

 

Comparing to the publicly available A-10C -1, this is not the correct behavior.  The -1 states that above 3,000’, if the pitch is +- 35 degrees, then the radalt should function up to +120 degrees of bank in either direction.  If pitch is 35-50 degrees, only +-15 bank is tolerated.  Beyond 50 pitch behaviour is undefined.  Below 3000’ its actually better, with less than 45 degrees of pitch providing 120 degrees of bank, and 45-60 pitch allowing 15 of bank.  Page 1-69 for the original wording.

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8 hours ago, Puma said:

120 degrees of bank

Wouldn't then the RadAlts be pointing up towards the sky?

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Already reported.

  • Thanks 1

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7 hours ago, Leg2ion said:

Wouldn't then the RadAlts be pointing up towards the sky?

If the antennas were mounted only on the belly as they are on civilian aircraft that would be true.  But, the A-10C has one antenna on the bottom of both horizontal stabs, and two antennas on the outboard sides of each vertical stab.

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