If you don't have a PostScript
printer (or if you want to preview PostScript on your display) you need
Plotfoil is a package for plotting airfoil sections to a variety of
printers. It consists of three programs: plotfoil plots (in
PostScript) airfoil sections (well, actually any section that is not
smoothly closed) and allows for spars, sheeting, template sizes;
editfoil is a program that allows airfoil sections' camber and
thickness to be changed to any desired value; and mixfoils
allows different airfoil sections to be hybridised. All the NACA 4-digit
and many of the 5-digit sections can also be generated.
The source-code for Plotfoil is available: GZIP'ed tar
format (approx. 1.1 MB) or PKZIP (approx. 700KB)
-- these archives include a Tcl/tk graphical front-end and all the airfoil
data from the
UIUC low-speed tests airfoil site);
are available (this
includes the MS-DOS binary distribution of
Ghostscript as well as all the airfoil data and is about 2.2
megabytes). Warning: my development environment
is Unix, and I don't have access to any kind of Micros**t system; let
me know if there are problems but I might not be able to help you.
Michael Shellim (firstname.lastname@example.org) has written a
MS-Windows front-end for Plotfoil pfwin31.exe
; it requires the
Visual Basic runtime DLL pfwinvb31.exe
I no longer have these files; please do a web search for them if
Plotfoil runs on all systems that I know of that have a C compiler. The
current release version is 3.3.
What do you think of software patents and interface copyrights? If the right
to write programs is important to you, you should consider joining the
League for Programming Freedom.
Introduction to R/C Flying
The rec.models.rc FAQ list is availble both via ftp and WWW. Here's
the HTML version. A text-only
version is available by anonymous ftp to ftp.drones.com; get
This is a circuit diagram in
GIF (36K) format
for an intelligent glowplug driver. It
flood feedback and excess current protection. Uses the versatile 555 chip
and an op-amp, with transistors for current control; another version uses a
MOSFET. (By Jonathan Scott, ETI June 1983.)
a free Unix clone that runs on PC's (386 or better). It comes with TeX,
compilers, Emacs, X windows.... the works. And unlike the dreck foisted on
us by those villains in Redmond, with Linux you don't have to hit that reset
your PC five times a day!
Please let me know if any of
these links are broken!
Go back to Shamim's homepage
$Date: 2005/07/23 20:37:44 $