From cd3dec54ef94debfb8845ed9e157e631707fff56 Mon Sep 17 00:00:00 2001 From: curt Date: Thu, 15 Apr 1999 23:58:04 +0000 Subject: [PATCH] Changed Aero() method to correct body axis force calculation from wind vector. Fix provided by Tony Peden. --- Simulator/FDM/JSBsim/FGAircraft.cpp | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/Simulator/FDM/JSBsim/FGAircraft.cpp b/Simulator/FDM/JSBsim/FGAircraft.cpp index d32ac26c0..715b3f60d 100644 --- a/Simulator/FDM/JSBsim/FGAircraft.cpp +++ b/Simulator/FDM/JSBsim/FGAircraft.cpp @@ -34,6 +34,8 @@ name of a valid, registered aircraft, and the data file is parsed. HISTORY -------------------------------------------------------------------------------- 12/12/98 JSB Created +04/03/99 JSB Changed Aero() method to correct body axis force calculation + from wind vector. Fix provided by Tony Peden. ******************************************************************************** COMMENTS, REFERENCES, and NOTES @@ -390,9 +392,9 @@ void FGAircraft::FAero(void) for (int ctr=0; ctr < coeff_ctr[axis_ctr]; ctr++) F[axis_ctr] += Coeff[axis_ctr][ctr]->Value(); - Forces[0] += F[LiftCoeff]*sin(alpha) - F[DragCoeff]*cos(alpha) - F[SideCoeff]*sin(beta); - Forces[1] += F[SideCoeff]*cos(beta); - Forces[2] += -F[LiftCoeff]*cos(alpha) - F[DragCoeff]*sin(alpha); + Forces[0] += F[DragCoeff]*cos(alpha)*cos(beta) - F[SideCoeff]*cos(alpha)*sin(beta) - F[LiftCoeff]*sin(alpha); + Forces[1] += F[DragCoeff]*sin(beta) + F[SideCoeff]*cos(beta); + Forces[2] += F[DragCoeff]*sin(alpha)*cos(beta) - F[SideCoeff]*sin(alpha)*sin(beta) + F[LiftCoeff]*cos(alpha); } @@ -461,4 +463,3 @@ void FGAircraft::GetState(void) void FGAircraft::PutState(void) { } - -- 2.39.5