jn190068@longs.LANCE.ColoState.EDU (Jay Nestle) (05/19/91)
Program for hp48 follows under aeronautics program
Airplane performance programs/equations
Written by: Jay Nestle
Spring 1991 for ME460 Aeronautics
The text from which most of this material is from is:
Introduction to Flight
John D. Anderson Jr
McGraw-Hill 1989
This is a great intro book on Aeronautics. It is however basic and
thus many assumptions are made. One can however, using the program
I made, come up with fairly reasonable approximations to how an
airplane will behave.
I strongly recommend getting this text and looking at where this
information comes from. With the text in hand and your 48 you will be
capable of solving problems form take-off and landings to stability.
Without the text this program will probably make no sense at all. The
equations (accessed simply from the solver catalog) are listed as the
same in the text, i.e. equation 7.31 in the text is E731 in this program.
To use the take off and landing directories, ie Slo and Sl for distance for
lift-off and distance for landing, you must have the Equation Library to
be able to run the Multiple Equation Solver (MES). If you don't have this
then just purge these directories, the other equations will work fine with
the built in solver.
The lift-off equation does not include any time for rotation, if this
is needed simply take the value for Vinfinity (velocity at liftoff) and
multiply that by the rotation time to get the rotation distance. You then
add this to the calculated value for Slo.
One of the nice features of the 48 is the ability to plot. You
can use this to plot power required vs. velocity if you wanted. You would
just use E637 (see the text) and change your independent var to vinfinity
and plot away! You could then plot on top of this the power available
curve and find the operating points for the aircraft where these intersect,
this also gives your velocity then.
Other things to do: Plot your rate of climb vs altitude to get
your absolute and service ceilings. Remember these programs work for
both propeller and jet aircraft so a lot of assumptions have been made,
particularly in propeller effeciency.
Jay Nestle
jn190068@longs.lance.colostate.edu
"Save the earth, develop space." - Bumper StickerHCLIMER%UTCVM.BITNET@CUNYVM.CUNY.EDU (HArold Climer) (05/21/91)
This sounds like a neat program. I don't have the text you mentioned but it
may be available at the library at UTC. It sounds like it might be a good
addition to Flight Simulator 4. I'm getting pretty good at flying the 747,but
it's like flying a cow compared to one of the jets I designed.
Harold Climer
Physics Department
U. Tennessee at Chattanooga