Is there any particular "rule of thumb" for switching from a 2-bladed to a 3-bladed prop???

I'm trying to go for a more "scale" look for my Scorpio Hellcat.

It comes with a 10 x 7, 2-blade prop, and uses a geared, 400 long-can motor.

I would like to try a 3-blade, but without loosing power or speed... is this possible???

What would be the trade-offs, if any?

Thanks!

Tim

2 to 3 blades, leave pitch the same and reduce diameter by approx 10%. So a 9 x 7 would be about right.

Multiblade props are a little less efficient but you're not likely to really notice the difference unless the plane is already marginal.

Steve

Thanks Steve!

Say... could you explain to me exactly what a "tip stall" is and what causes it???

Is it more related to airplane design? ...or to pilot error???

Also, is it preventable?

Thanks.

Tim

Tip stalls have nothing to do with 3-blade props or with Power Systems. They are discussed fairly often so a search might help. If you don't find enough by searching I suggest starting a new thread in the Modeling Science forum. I'll be glad to chat about it there.

Steve

Steve,

OK! I'll DO that!

Thanks!

Tim