
AeroCFD MacOS For Mac OSX
Instruction Manual
Rocket Flight
Characteristics and Drag Coefficient (Cd)
verses Velocity To Mach 10

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PAGE 
PRODUCTS  CONSULTING  MISSION  RESUME 
Copyright © 19992016 John Cipolla/AeroRocket. All rights
reserved

AeroCFD
for Mac OSX
(version 2) is a computer program that uses
Apple's Xcode 7 IDE and C++ to compute drag coefficient (Cd)
as a function of Mach number up to Mach 10 and flight
characteristics for single stage rockets in a suite of
three programs called, 1) AeroCFD MacOS, 2)
AeroCFD MacOS Plot and 3) Rocket Analysis.
Summary of Features
1) Tool tip
description for each input variable.
2) Determine drag coefficient (Cd) verses velocity to
Mach 10. Where, V = Mn * a, and a is the speed of
sound.
3) Display Cd at a specified velocity and plot Cd verses
Mach number to Mach 10 using AeroCFD MacOS Plot.
4) Display input data and all drag components at a specified Mach
number using AeroCFD MacOS Plot.
5) Determine velocity
change (dV),
maximum altitude, propellant mass flow rate and
exhaust velocity knowing rocket thrust, specific
impulse, initial mass, final mass, average rocket Cd and maximum airframe diameter
using Rocket Analysis. Rocket Analysis
uses a modified rocket equation that includes
aerodynamic drag to estimate rocket velocity and peak
altitude. Flight analysis results reduce to classical
rocket equation results by inserting Cd equal to zero.
Macintosh System Requirements
Base SDK: Mac OS X 10.9 or later
Architectures: Standard (32/64bit Intel)
Developed on a 27" iMac computer with Xcode 7

Figure1, Model rocket Cd verses Velocity (V = Mn * a) analysis,
actual
size. Where speed of sound = a.
Determine drag coefficient (Cd) verses velocity for
single stage rockets by inserting flight velocity in the first
text box on the main screen and clicking tab.
Insert all
the required design information after clicking tab to
advance to the next text box until all the rocket design
information is specified. When data in the final text
box is specified click Solve to display the drag
coefficient (Cd) for the rocket at the specified
flight velocity. The results illustrated in Figure1
display Cd verses Mach number for a typical rocket. 
Figure2, Results from Figure1 and
SpaceShipOne (SS1) flight analysis, Screen shot not actual size on
an iMac
computer.
Rocket
Analysis determines maximum velocity (m/sec) and maximum altitude
(km) for single stage suborbital rockets. Insert Rocket Thrust (nt), Isp (sec),
Initial Mass (kg), Final Mass (kg), Average Rocket Cd,
and Maximum Diameter (cm). Run AeroCFD MacOS Plot
to display Maximum
altitude (km), Propellant mass flow rate (kg/sec) and
Exhaust velocity (m/sec). The rocket results illustrated in
Figure2 display flight information for the
SpaceShipOne. 


MAIN
PAGE 
PRODUCTS  CONSULTING  MISSION  RESUME 
Copyright © 19992016 John Cipolla/AeroRocket. All rights
reserved 