Strong counter rotating propellers

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Please suggest about where can i get strong counter rotating propellers

[Arthur P.]

Stronger than what. What diameter? What do you have in mind? Besides the EPP1045's which aren't the strongest there are of course the APC-SF and APC-E ranges, and the GWS 3-bladed props.

Finally there is a company in Germany who make 3 bladed props of various diameter where you can set the speed. Start at about 10 inch but go way up.

Of course there is also a very different approach: make your own either from carbon fiber, or by making a alu mounting plate and using the blades from co-axial helis.

I-m in Europe, tend to order EPP, GWS and APC props from www.cnc-modellsport.de who have a very large collection of counterrotating props. In the US I think there's Todd's Models. There are certainly some additional sources around the globe. Google does help finding some.