odam2k
Flying officer
Posts: 20
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Post by odam2k on Oct 23, 2008 21:58:27 GMT 1
Because the wing is flat on the bottom, the cub wont fly inverted and stay level. Has anyone tried modifying the wing? I was thinking maybe take my old wing, cut out the middle part, and glue the ends to the underside of the wings to create a symetrical shape? The problem then would be the thickness, and then the ailerons may not deflect down far enough to have any effect  |
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Post by flydiver on Oct 23, 2008 23:18:47 GMT 1
It's a bit more than just that. Some of it has to do with wing incidence, center of gravity (vertically) and weight loading too. I have a Wasp, it's a slow stick knock-off with an aileron flat wing about the same size and shape as the Cub. Zero wing incidence. It doesn't have as much weight hanging under the wing and is lighter. It flies upside down quite well and easily with only a bit of up elevator.
fly
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Post by duck9191 on Oct 24, 2008 3:27:42 GMT 1
my simple stick uses the same wing as flydivers wasp and it flys very well inverted. there is alot of factors in how well something will fly inverted.
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Post by bulldog319 on Oct 24, 2008 6:19:43 GMT 1
It's a matter of power, flying inverted no problem after I started using lipo. Eventually going to burn the motor up doing it, but it will do it. Full pattern with no apparent altitude loss and I've even managed to push it outside to upright again, but I do have a lot of throw in the elevator.
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odam2k
Flying officer
Posts: 20
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Post by odam2k on Oct 24, 2008 11:53:48 GMT 1
Ok, so its not going to get much better than it is... Thats ok, its nice to at least have ailerons to play with. I do have plenty of power, I have a brushless eMax 2215/25 running on 3S1P Lipo and I have flattened the wing. I'll just have to learn to coordinate the elevator with my aileron rolls ;D
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jt01
Squadron leader
Posts: 166
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Post by jt01 on Oct 24, 2008 12:00:03 GMT 1
If you want to fly inverted better drill new holes in the struts further up from the existing slots. Make them just far enough that they will pull the wing down flat removing all dihedral. To do this lay the plane upside down on a table. lightly push down on the fuse and drill new holes in the struts. This will make it so you need to use more elevator during take off and landing. Also be aware that it won't self level anymore and will require a little more flying talent from you. This also makes the plane a little faster.
Jim
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odam2k
Flying officer
Posts: 20
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Post by odam2k on Oct 24, 2008 14:39:01 GMT 1
If you want to fly inverted better drill new holes in the struts further up from the existing slots. Jim I did that, and yes, it does take more talent to fly it  I really do enjoy it much more now that it has ailerons, especially as a rc heli pilot, I have no problem with coordinating the rudder and ailerons in a turn.... |
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Post by ginginho on Dec 4, 2008 11:42:02 GMT 1
Odam, I'm checking out stuff to go B/L soon, and have the Emax2215/25 in the list of possible motors. How well does it perform? Any bad things you've noticed? The price is about 1/4 of a Park 480, maybe a little less power, but seems good value. I see from the spec that the shaft is 3mm, and have seen a forum post (elsewhere) where someone was bending/breaking props on their PZ Spitfire. Although that's belly landings all the time so not necessarily a good comparison, have you had any shaft problems due to heavy-ish landings or nose diving during taxi on grass? Apologies for the list of questions, only one more What's your prop of choice? 10x6? APC/GWS??? |
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I really do enjoy it much more now that it has ailerons, especially as a rc heli pilot, I have no problem with coordinating the rudder and ailerons in a turn....