I know of two company that sell propeller design software, and there are
some other online, but them seems all to be incomplete, I am not saying this
to sell more, just fact, but some don't calculate the Diameter ! one of the
most important design criteria, other lack strength and safety
calculations...

I made my program for my own use, then I have changed it many times to be
more user friendly and complete, Rome wasn't built in one day, so I have but
in many hours making the program work as I wanted it and by requests from
customers, and not least making it work with both US system and metric
system, and on computers all around the globe.

My program is made for the home builder in mind, it is not that difficult to
make a wood prop, if you can make a airplane you can make a propeller,
calculate it can be time consuming, isn't that the reason we have computers?
all the time we save with the computer... or is it spend with the computer?
anyway, Now it is possible to calculate a prop in a minute, make it in a CAD
program in 10 minutes, make drawings and templates or even let a CNC router
make the prop. (but we have to glue the laminates together) Making it by
hand is still an option, and very satisfying when finished, not all have a
home made prop in the nose or rear, at the fly-ins!

Real Propeller design software cost some, but that is saved in on the first
propeller made. then you can make props for your friends too.

Jan Carlsson
www.jcpropellerdesign.com



"LCT Paintball" skrev i meddelandet
news:wtn4e.12908$Vx1.12789@attbi_s01...
I've been reading every post here for a few weeks. I am absolutely amazed
by
the amount of knowledge that lives here!
With the butt kissing done, I hope you'll excuse my ignorance.

I was interested in the discussion concerning the weight of different prop
materials. Has anybody tried to make a hollow aluminum prop? What about
titanium? Carbon fiber?

What kind of testing needs to be done on a home built prop?
Are there prop styles that can be copied without patent infringements?

Has anybody tried making a flexible prop? My thinking is that it might be
possible to create a prop with a low angle of attack for high power take
offs, then have it flex to a higher angle of attack as the load decreases.
Could something like that give the performance of a constant speed prop
without the complexity and added weight?

If I were to play around with different prop designs, is there somebody
around here with the knowledge and time that might be willing to test them
for me?
--
"Don't be misled, bad company corrupts good character."
www.LCTPaintball.com
www.LCTProducts.com