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Instruction Manual

Drag Coefficient (Cd) To Mach 10 and
Single Stage to Orbit Flight Analysis

REASONS FOR DISCONTINUING
AEROCFD FOR MACINTOSH

1. Macintosh users lack of interest (20%)
2. Serious errors and limitations in Xcode (60%)
3. Technical support not available from Apple (20%)

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Copyright © 1999-2011 John Cipolla/AeroRocket. All rights reserved


AeroCFD
for Mac OS X (version 10.6.0 or later) is a rocket analysis computer program that uses Apple's Xcode IDE and C++ to compute drag coefficient (Cd) up to Mach 10 and computes maximum altitude and maximum velocity for single stage and suborbital rockets for the low price of only $20.

Summary of Features
1) Tool tip description for each input variable.
2) Plot drag coefficient (Cd) verses Mach number (Mn) to Mach 10.
3) Display Cd at a specified Mn.
4) Display drag components at a specified Mn.
5) In Flight mode display maximum velocity (dV), maximum altitude (Hmax), propellant flow rate (Mp) and exhaust velocity (c) knowing rocket thrust, specific impulse (Isp), initial mass, final mass, average rocket Cd and maximum airframe diameter.

Macintosh System Requirements
Architectures: Standard (32/64-bit Intel)
Base SDK: Mac OS X 10.6
Valid Architectures: i386 ppc ppc64 ppc7400 ppc970 x86_64

AeroCFD Mac OS model rocket Cd vs Mn
Figure-1, Model rocket Cd verses Mn analysis, 67% of actual size

To determine drag coefficient (Cd) verses Mach number (Mn) for single stage suborbital rockets simply insert a value for Mn greater than zero (> 0) in the first text box on the main screen and press return. Then, insert the required design information specified in the dark gray area and the remaining data into the text boxes provided. After entering data for each text box press 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 press return to display a plot of Cd verses Mn and drag (Cd) contribution for each component. The results illustrated in Figure-1 display Cd verses Mn for a typical model rocket

AeroCFD Mac OS SS1 flight analysis
Figure-2, SS1 flight analysis, 67% of actual size

To determine maximum velocity (dV) and maximum altitude (Hmax) for single stage suborbital rockets simply insert zero (0) in the first text box on the main screen and press return. Then, insert Rocket Thrust (nt), Isp (sec), Initial Mass (kg), Final Mass (kg), Average Rocket Cd, and Maximum Diameter (cm) in the text boxes corresponding to the dark gray area. The text box entries outside the dark gray area may be ignored for the Fiight Analysis. After entering data into each text box press tab to advance to the next text box until all flight information is specified. When data corresponding to the final text box in the dark gray area is entered press return to display Maximum velocity (m/sec), Maximum altitude (km), Propellant mass flow rate (kg/sec) and Exhaust velocity (m/sec). The results illustrated in Figure-2 display flight information for SpaceShipOne.

AeroCFD Mac OS V-2 rocket Cd vs Mn
Figure-3, V-2 rocket Cd verses Mach number analysis, 67% of actual size

To determine drag coefficient (Cd) verses Mach number (Mn) for single stage suborbital rockets simply insert a value for Mn greater than zero (> 0) in the first text box on the main screen and press return. Then, insert the required design information specified in the dark gray area and the remaining data into the text boxes provided. After entering data for each text box press 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 press return to display a plot of Cd verses Mn and the drag (Cd) contribution for each component. The results illustrated in Figure-3 display Cd verses Mn for the full scale hypersonic V-2 rocket.

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|
MAIN PAGE | PRODUCTS | CONSULTING | MISSION | RESUME |
Copyright © 1999-2011 John Cipolla/AeroRocket. All rights reserved