Propulsion

ONX/OFFX
ENGINE MAKER

ONX/OFFX

Use:design of an engine (ONX) and analysis at off-design conditions (OFFX)
Author:Jack Mattingly
Address:purchase from the AIAA or some software available from Mattingly's software web site. (Mattingly moved from the Air Force Academy to the University of Seattle.)
Platform:PCs
Documentation:based on the AIAA book (Mattingly, Heiser, and Daley, 1987), and Mattingly's user's manual, also available online (Mattingly, 1987)
Availability:a disk is for sale by the AIAA, also ONX, is available from Mattingly's software website, where OFFX is apparently included in the AEDsys code, also available on the site.
License:single use only, but does not prohibit use in design lab, as the AIAA RDS-Student code license does.
Code:purchasers originally got the FORTRAN code, I'm not sure that's still the case
Graphics:no
Discussion:These codes have been heavily used in the design class by the propulsion team members. They can provide some valuable help. The book is good, and the book and codes are relatively inexpensive. Rumor has it that a second version has been developed by Mattingly, who is now at the University of Seattle. In fact, he has written another book, which is not published by the AIAA. The students say that although the interface is not as fancy as ENGINE MAKER (below) they have been able to get better engines from ONX/OFFX.
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ENGINE MAKER

Use:engine design and analysis
Author:Rolls Royce
Address:c/o AIAA, see below
Platform: IBM compatible PC running Microsoft Windows 3.x.
Documentation:a brief manual comes with the code
Availability:To obtain a copy, contact the director of Student Programs (originating director was Patrick Gouhin), AIAA Student Programs Director, 370 L'Enfant Promenade, SW, Washington, DC 20024-2518, (202) 646-2518.
License:must be kept strictly for design class
Code:user get an executable
Graphics:yes
Discussion:Recently a new propulsion design tool has been made available by the AIAA in conjunction with Rolls Royce for use in AIAA design competitions (distribution restricts use for other purposes). The program, ENGINE MAKER, is intended to synthesize unmixed and mixed turbofan engines. It is a design point program, although it is possible to do some limited off design calculations. The code has a very nice graphical interface. It requires a minimum of a 386 processor. A math coprocessor is recommended.
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