fly/flightgear
1
0
Fork 0
Code Activity

Linux / GCC compile fixes

Browse source
This commit is contained in:
James Turner 2018-08-26 15:39:30 +01:00
parent e3d032942e
commit 5bb3f10ba1
1 changed files with 3 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
src/Aircraft/AircraftPerformance.cxx
View file

@ -18,6 +18,7 @@
#include "AircraftPerformance.hxx"
#include <cassert>
#include <algorithm>
#include <simgear/constants.h>
@ -274,7 +275,7 @@ double oatKForAltitudeFt(int altitudeFt)
double pressureAtAltitude(int altitude)
{
#if 0
/*
p= P_0*(1-6.8755856*10^-6 h)^5.2558797 h<36,089.24ft
p_Tr= 0.2233609*P_0
p=p_Tr*exp(-4.806346*10^-5(h-36089.24)) h>36,089.24ft
@ -283,7 +284,7 @@ double pressureAtAltitude(int altitude)
6.8755856*10^-6 = T'/T_0, where T' is the standard temperature lapse rate and T_0 is the standard sea-level temperature.
5.2558797 = Mg/RT', where M is the (average) molecular weight of air, g is the acceleration of gravity and R is the gas constant.
4.806346*10^-5 = Mg/RT_tr, where T_tr is the temperature at the tropopause.
#endif
*/
const double k = 6.8755856e-6;
const double MgRT = 5.2558797;