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Mar 27, 2004, 03:02 AM
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The Flying Pig's Avatar

Is my prop on the right way?

For a pusher (X-ite / EleBee) is my prop on the right way?
How can you tell?
Last edited by The Flying Pig; Mar 27, 2004 at 03:23 AM.
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Mar 27, 2004, 03:24 AM
Registered User
The Flying Pig's Avatar
Sorry, should be on the 'power systems' forum - can this be moved?
Mar 27, 2004, 03:43 AM
Tech freak
Looks like the prop is in the wrong direction to me.
The sharp and thin longside of the blade is the trailing edge.
By looking at the prop its also possible to see how it should spin to be efficient.

Mar 27, 2004, 04:12 AM
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The Flying Pig's Avatar
Yep, I think you're right - thanks.
Mar 27, 2004, 04:31 AM
wizard of OZ
james_28's Avatar
it is as i can see the numbers on the prop
Mar 27, 2004, 07:03 AM
Registered User
The prop in the photo IS on backwards.

Props were originally called airscrews and it helps to think of them that way. When they are spinning in the correct direction (clockwise when standing behind the aircraft and looking forward) would the prop be screwing thru the air and pulling/pushing the aircraft forward?

To make things a bit more confusing, props will still produce some thrust even when mounted backwards (and still spun in the correct direction). This used to be done on purpose by some freeflighters when testing/trimming their gas jobs, as it reduced the power a lot for the first flights.

In any case, flip that one over and go have some fun.

Mike Hines
Mar 27, 2004, 11:09 AM
Registered User
my understanding is that the writing on the props should always be facing forwards (ie the direction of flight), whether it be tractor or pusher.
Mar 27, 2004, 11:46 AM
rwp's Avatar
You can't always go by the writing on the prop. Depends on the manufacturer. The props that came with my Zagi XT must be turned with the writing towards the back. They have MAXX written on them. I have others that look identical but the writing on them must face forward. These are both black 5X5 props. The one pictured needs to be turned around.
Mar 27, 2004, 12:40 PM
Registered User
The Flying Pig's Avatar
Thanks for the replies - turned it around.
Nice to know how to tell which way round props go in general.
Used bigger props in the past for IC models.

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