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added physical constant cp

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Eric van den Berg 2013-02-17 16:44:47 +01:00 committed by James Turner
parent 63c7d64143
commit 57b4ce96e4
1 changed files with 4 additions and 1 deletions
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simgear/constants.h
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@ -1,7 +1,7 @@
// constants.h -- various constant definitions // constants.h -- various constant definitions
// //
// Written by Curtis Olson, started February 2000. // Written by Curtis Olson, started February 2000.
// Last change by Eric van den Berg, Dec 2012 // Last change by Eric van den Berg, Feb 2013
// //
// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt/ // Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt/
// //
@ -122,6 +122,9 @@ const float SG_RADIANS_TO_DEGREES = 180.0f / SG_PI;
/**specific gas constant of air*/ /**specific gas constant of air*/
#define SG_R_m2_p_s2_p_K 287.05 // m2/s2/K #define SG_R_m2_p_s2_p_K 287.05 // m2/s2/K
/**specific heat constant at constant pressure*/
#define SG_cp_m2_p_s2_p_K 1004.68 // m2/s2/K
/**ratio of specific heats of air*/ /**ratio of specific heats of air*/
#define SG_gamma 1.4 // =cp/cv (cp = 1004.68 m2/s2 K , cv = 717.63 m2/s2 K) #define SG_gamma 1.4 // =cp/cv (cp = 1004.68 m2/s2 K , cv = 717.63 m2/s2 K)