The Book "How I Make Propeller" is very good for what it says to be, HIS way
to make propellers, Interesting to see how he struggle to learn, He most of
the times have to make 2-3-4 propellers before he get it right, but he learn
from it every time, working a lot with VW's he is out on unknown waters, and
that don't make it easier. But he get to know his VW's (and others)
He is wrong about that it is impossible to calculate the correct pitch and
propeller, you don't have to guess.
They could do that during and before WW I
What he is guessing is really how powerful his engines is, and how fast the
plane will be.
Knowing the HP, RPM and Speed you can calculate an correct Propeller the
first time.
You can do that with pen and paper, hand-calculator or why not a computer.
The Computer make it possible to calculate it faster and more exact, easy to
change a parameter and see the result and get warnings when it start to get
unsafe, all in a milli sec.
Carving the Propeller isn't that hard as many think, all you need is some
tools most homebuilder have. Make a few templates, start with a saw and axe
or power disk sander, a draw knife or planer, and finish with sandpaper. A
propeller balancer should every homebuilder or wood propeller owner have.
Jan Carlsson
www.jcpropellerdesign.com
"Ernest Christley" skrev i meddelandet
m...
Corky Scott wrote:
Sebastian, several people have fabricated composite propellers in
their shop. It isn't easy to do and the prop REALLY has to be of
sound construction in order to withstand the forces of thrust,
vibration reasonance and turbulence.
I suggest you do a search on the internet to see if you can find the
websites of those who have documented their techniques. Be prepared
to spend a LOT of time getting it right.
Propeller design is not simple.
Good luck, Corky Scott
In the library section to my website I have a link to "How I Make
Propeller"
The author does a very good job of telling you things you want to know.
--
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
alleviated by information and experience."
Veeduber