WTB: 3 blade pusher

These are standard hobby shop items. There is a variety of sizes (diameter/pitch)that are appropriate for a .60, so you need to specify.

Not 3 blade. 10 x 7 or better..........

No they aren't...I used to see them from Grish or Graupner. The one sold by Master Airscrew is too big I think. I bought a few regular 3 blades for my .60. Someone told me once that you could mount them backwards and use them as pushers. Never tried it, but I believe the efficiency would be down....

FredD

Um, no. Flipping a prop over doesn't make it into a pusher. If it did, we wouldn't have any trouble finding pusher props.

Take a regular propeller and flip it over. The twist in the blades is still in the same direction. It will still move air in the same direction as it did before, just not as efficiently.

...and no, you can't just run most engines backwards, at least not without a custom reverse crankshaft. Enyas and other engines with removable front sections can be made to run backwards by turning the front section 90 degrees and bolting it back on. It may be easier (and cheaper in the long run) to find an Enya engine and use a standard

3-blade prop than it will be to find a 3-blade pusher in the size you need. If you do find one prop now, Murphy says you'll break it and not be able to find another one... The alternative is a plane that can't be flown...

| Looking for someone with a 60 size 3 blade pusher for sale or trade.

How about this?

Master Airscrew 14x7P 3-Blade Pusher Propeller

Though it's probably a bit too big for you. If your engine is really a 0.90 two stroke or 0.70 four stroke, this may be perfect.

There's not really many pusher props to choose from once you get above

40 sized engines. give you a good idea of what's out there.

As somebody else mentioned, it may be easier to modify the engine to run backwards -- but even that's not that easy.

The APC 11X7 pusher would be just about right for a 60 size two stroke. The

14X7 would be too much prop even for many .91 four strokes. That prop is close to a 16X7 two blade.

will give you a good idea of what's out there.

I want to put it on an Old OS 77 df motor!

Forget it. Those engines are designed to turn way too many RPMs for standard props. IIRC, many DF motors turn in the 25K region. It takes special props even for a 8" prop to do that.