Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
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Old Jul 28, 2011, 06:16 PM
Daemon is offline
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"pusher" version props only exist for gas planes because they can only turn the motor
one direction. For electrics you just use the regular prop (still with
convex side forward) and spin the motor the opposite direction.

ian
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Old Jul 28, 2011, 06:43 PM
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Quote:
Originally Posted by Daemon View Post
"pusher" version props only exist for gas planes because they can only turn the motor
one direction. For electrics you just use the regular prop (still with
convex side forward) and spin the motor the opposite direction.

ian
Ok and what about the tail being shacky. It was my post before the one about the prop. Thanks!
Old Jul 28, 2011, 06:59 PM
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Originally Posted by rcplanes1234 View Post
Ok and what about the tail being shacky. It was my post before the one about the prop. Thanks!
That's normal. Mine shakes and has not been a problem. Some reinforce it, but I don't think it's necessary.
Old Jul 28, 2011, 07:54 PM
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Quote:
Originally Posted by rsowder View Post
That's normal. Mine shakes and has not been a problem. Some reinforce it, but I don't think it's necessary.
some people but way to much on. I think if you get those cr in nice and glued the wing snapping will no be a problem especially with the new version.
Old Jul 28, 2011, 08:05 PM
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Originally Posted by rcplanes1234 View Post
some people but way to much on. I think if you get those cr in nice and glued the wing snapping will no be a problem especially with the new version.
I have made no structural modifications to mine and have had no accidents in over 60 flight hours.
Old Jul 28, 2011, 10:22 PM
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Quote:
Originally Posted by Daemon View Post
"pusher" version props only exist for gas planes because they can only turn the motor
one direction. For electrics you just use the regular prop (still with
convex side forward) and spin the motor the opposite direction.

ian
Ian,
Your statement is not totally correct, pusher props do exist for electric motors although they are not really necessary because you can run the motor in either direction.

http://www.toddsmodels.com/APC_Pusher_s/43.htm

An electric pusher is usually used in a twin configuration so you can have counter rotating motors to help with yaw and critical motor issues in the event you have one motor fail during flight. On a single motor application, you have no critical motor so it's just a matter of what torque direction you care to deal with. Either a normal prop or an electric pusher would give equal performance.

Bruce
Old Jul 28, 2011, 10:44 PM
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Quote:
Originally Posted by bah7566 View Post
Ian,
Your statement is not totally correct, pusher props do exist for electric motors although they are not really necessary because you can run the motor in either direction.

http://www.toddsmodels.com/APC_Pusher_s/43.htm

An electric pusher is usually used in a twin configuration so you can have counter rotating motors to help with yaw and critical motor issues in the event you have one motor fail during flight. On a single motor application, you have no critical motor so it's just a matter of what torque direction you care to deal with. Either a normal prop or an electric pusher would give equal performance.

Bruce
Ok thank you!
Old Jul 28, 2011, 11:37 PM
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I put "pusher" in quotes to emphasize the pushing requirement. Your explanation
for the existence of counter-rotating electric props are still for tractor application.
There is no need for a true pusher electric prop.

ian
Old Jul 29, 2011, 12:38 AM
EarthOrbiter is offline
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Fly Chitty Chitty Bang Bang!
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Vertical wings


Vertical lift with multiple props may require a counter rotation.
A angle of around 3 Deg offset depending if it is CW or CCW helps to mechanicaly balance the twisting air direction. Prop torque is a interesting discussion. It reverses with propeller direction.
Old Jul 29, 2011, 03:03 AM
uptime4downtime is offline
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3d Kiwi
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Hi. Can this plane be successfully flown with just an rudder/elevator? I'm interested in this comparison to stock ezy* which is stable as a simple r/ e flyer. I desire this for simplicity/ safety reasons.

One more question. How does it handle wind? Thanks Regards. Rick
Last edited by uptime4downtime; Jul 29, 2011 at 03:14 AM.
Old Jul 29, 2011, 03:54 AM
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It might fly with R/E only but it would handle like a pig. Eliminating ailerons
doesn't make an aircraft safer, especially in wind.

ian
Old Jul 29, 2011, 04:24 AM
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In many of my videos I fly with the end result in mind - it means I try to keep the plane and camera as flat as possible.

That is turning with rudder but counteracting with ailerons.

At 1 time I forgot to connect the ailerons and I had a hard time bringing the plane back safe on ground - I would not fly without it.
Old Jul 29, 2011, 07:14 AM
jayb1rdz is offline
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Never fly an A model anything!
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Usually but not always, ailerons will bank the plane before turning. With rudder, the model will turn before banking.

On full scale, often the rudder is used to stop the plane dropping the nose and sliding out of the sky like a frisbee on a sharply banked turn. The point being, it's best to have both options.
Old Jul 29, 2011, 10:52 AM
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Where should i measure the cg? The manual says 75mm back from the leading edge but I don't always trust that. I measured at 75mm and I was tail heavy. Thanks
Old Jul 29, 2011, 11:55 AM
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Flying low is expensive.
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25-30mm behind the servo wires. Haven't you at least skimmed this thread?


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