propellers,propellers and more propellers

[zicmu]

Any body got a theory on how to design propellers?
I have to design a propeller and i want to know where do i have to start..
Please show me the theory from the basics until u have a propeller.
The materials used and all the details..
please..please
:(

[Steve Guinn]

Do a Google search on " propeller designing " and you will see many links.

This one looks promising.....
http://naca.larc.nasa.gov/reports/1925/naca-tn-212/

[steve lewin]

Do you mean technical design theory or do you just mean how to make a propeller ?

If you mean technical desgn have a look at http://www.mh-aerotools.de/airfoils/index.htm

Otherwise we'll need details about what the propeller is for. Materials and construction depend on size, power etc.

Steve

[zicmu]

I need a more detail specification on the angle of attack and the helix angle.
Technical design theory is good but I need also the information on how to create an efficient propeller and all the calculations behind it.
Plastic is the material to construct the propeller for my rc airplane,but i need to know the specific name.
Thanks for your reply.

[steve lewin]

It might be worth asking this in the Modeling Science forum. It's not really a Beginner's question.

(EDIT - thanks for moving it guys)

However no-one will be able to define the correct material for you to use unless you give some more details. E.g. size, maximum revs, type of power (IC, electric, rubber etc) and critically what construction methods are possible for you (moulding, carving, wet layup etc).

Most of the props I make are from old yogurt pots or very fine carbon fibre layup, but they're for small indoor models. Probably not what you're looking for ;).

Steve

[DaveGherardini]

I build or buy my props for each application. And usually The application makes the biggest decisions. The best part is that most applications can be compared to other exsisting applications.
. I dont think there is any reason to design a new prop, just modifying an exsisting style since we have narrowed it down pretty good in the last 100 years to what works best for each application.. So ,think of it like you have a prop on your plane that wont fly the plane. Well, lets say it wont get off the ground at all. The power system is working at its most efficient level. But it wont move the aircraft fast enough to generate enough lift to lift off. before i elaborate i want to know if im going in the right direction to your question. ....im not sure if im giving you the info your looking for...