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#1
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E6-B program for HP 15C
I was wondering if anyone had an E6-B flight computer program for the HP
15C calculator. I'm mostly interested in the back side of the E6-B with course correction for winds. Density altitude, and True airspeed calculations would also be nice. I could always write the program myself, but I'm feeling a bit lazy -- Chris W Gift Giving Made Easy Get the gifts you want & give the gifts they want http://thewishzone.com |
#2
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Try a search for handango
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#3
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I wrote the wind correction routine once in C, great excercise in high-school math. Here it is in case you need it.
float fWindAngle, fWindSpeed, fTrueCourse, fTrueHeading, fTrueAirspeed; // Sample data fWindAngle = 355; fWindSpeed = 10; fTrueCourse = 5; fTrueAirspeed = 100; float pi = 3.1415926f; float fGamma = 180 + fTrueCourse - fWindAngle; while( fGamma = 360 ) fGamma -= 360; // Use theorem of sines float fSinCorrection = sin( fGamma / 360 * 2 * pi ) * fWindSpeed / fTrueAirspeed; // sin of angle float fCorrAngle = 360 * asin( fSinCorrection ) / 2 / pi; // angle in degrees float fCosCorrection = cos( ( 180 - fGamma - fCorrAngle ) / 360 * 2 * pi ); // cos of angle opposite to GS fTrueHeading = fTrueCourse + fCorrAngle; if( fTrueHeading 360 ) fTrueHeading -= 360; if( fTrueHeading 0 ) fTrueHeading += 360; // Use theorem of cosines float fGroundSpeed = sqrt( fTrueAirspeed * fTrueAirspeed + fWindSpeed * fWindSpeed - 2 * fTrueAirspeed * fWindSpeed * fCosCorrection ); "Chris W" wrote in message news:Erjqe.25852$rb6.24822@lakeread07... I was wondering if anyone had an E6-B flight computer program for the HP 15C calculator. I'm mostly interested in the back side of the E6-B with course correction for winds. Density altitude, and True airspeed calculations would also be nice. I could always write the program myself, but I'm feeling a bit lazy -- Chris W Gift Giving Made Easy Get the gifts you want & give the gifts they want http://thewishzone.com |
#4
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Chris, you might get a better answer by crossposting to comp.sys.hp48.
Despite the group's name, all the HP calculators are discussed there. -- Paul Hirose To reply by email remove INVALID |
#5
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Check out www.hpmuseum.org
They have an extensive program list. Gerry "Paul Hirose" wrote in message nk.net... Chris, you might get a better answer by crossposting to comp.sys.hp48. Despite the group's name, all the HP calculators are discussed there. -- Paul Hirose To reply by email remove INVALID |
#6
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Gerry Caron wrote:
Check out www.hpmuseum.org They have an extensive program list. Gerry "Paul Hirose" wrote in message ink.net... Chris, you might get a better answer by crossposting to comp.sys.hp48. Despite the group's name, all the HP calculators are discussed there. Thanks Paul, I don't know why I didn't think to look there. They had one for the winds but not for TAS or Density altitude, I guess I will need to find the formulas for that and program that in myself. -- Chris W Gift Giving Made Easy Get the gifts you want & give the gifts they want http://thewishzone.com |
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