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Model Forum / Radio Controlled / Helicopters / April 2008Blade CX2
OK I know its a toy but do all balde CX-2's rotate quicker 1 one direction than the other if you apply full tail/rudder ???  SignatureKevin R Reply address works > OK I know its a toy but do all balde CX-2's rotate quicker 1 one > direction than the other if you apply full tail/rudder ??? Yep, that is how directional change occurs is a coaxial. ** Posted from http://www.teranews.com ** >> OK I know its a toy but do all balde CX-2's rotate quicker 1 one >> direction than the other if you apply full tail/rudder ??? > > Yep, that is how directional change occurs is a coaxial. > ** Posted from http://www.teranews.com ** I know that, but it turns so much quicker in one direction than the other SignatureKevin R Reply address works Kevin <dontemailme@ntlworld.com> wrote in news:YmtNj.90609$5i5.31641@newsfe6- gui.ntli.net: >>> OK I know its a toy but do all balde CX-2's rotate quicker 1 one >>> direction than the other if you apply full tail/rudder ??? >> >> Yep, that is how directional change occurs is a coaxial. >> ** Posted from http://www.teranews.com ** > I know that, but it turns so much quicker in one direction than the other I used to fly a Lama V4 coaxial and I had that too. Not 100% sure, but it may be due to the inability of the speed controller to apply enough power to the motors in one direction. That is, it's keeping one motor constant and adjusting the speed of the other. It can slow it down easily enough providing lots of torque difference for rotation in one direction, but it can't speed it up enough to make enough difference to make it rotate just as fast the other way. Brian Signaturehttp://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism Seismic FAQ: http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html Quake "predictions": http://www.skywise711.com/quakes/EQDB/index.html Sed quis custodiet ipsos Custodes? > Kevin <dontemailme@ntlworld.com> wrote in news:YmtNj.90609$5i5.31641@newsfe6- > gui.ntli.net: [quoted text clipped - 16 lines] > > Brian I did wonder if one set of blades is binding and its the gyro is keeping it straight and its the binding on one set that's producing more torque? SignatureKevin R Reply address works Kevin <dontemailme@ntlworld.com> wrote in news:RGLNj.68714$jH5.60310@newsfe3- win.ntli.net: > I did wonder if one set of blades is binding and its the gyro is keeping > it straight and its the binding on one set that's producing more torque? I can see that if one set is binding, then the controller would have trouble speeding that set up. The net result would be the same as my previous explanation. Brian Signaturehttp://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism Seismic FAQ: http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html Quake "predictions": http://www.skywise711.com/quakes/EQDB/index.html Sed quis custodiet ipsos Custodes? > Kevin <dontemailme@ntlworld.com> wrote in news:RGLNj.68714$jH5.60310@newsfe3- > win.ntli.net: [quoted text clipped - 7 lines] > > Brian I had another play last night and it rotates quicker in the opposite direction to the top set of blades with the flybar, this has quite heavy weights so it might just be down to pure physics that this set takes more power to spin SignatureKevin R Reply address works > > Kevin <dontemailme@ntlworld.com> wrote in news:RGLNj.68714$jH5.60310@newsfe3- > > win.ntli.net: [quoted text clipped - 11 lines] > weights so it might just be down to pure physics that this set takes > more power to spin It is 100% normal and is common to all heli's. It "wants to spin" one way so it will always yaw faster in that direction... even ona real heli. If it hovers with no yaw, don't touch anything. >>> Kevin <dontemailme@ntlworld.com> wrote in > news:RGLNj.68714$jH5.60310@newsfe3- [quoted text clipped - 18 lines] > even ona real heli. > If it hovers with no yaw, don't touch anything. this if you don't know the model is contra rotating coaxial design with no tail rotor, so in theory should spin equally well in both directions if both sets of blades have equal mass and drag SignatureKevin R Reply address works > >>> Kevin <dontemailme@ntlworld.com> wrote in > > news:RGLNj.68714$jH5.60310@newsfe3- [quoted text clipped - 22 lines] > no tail rotor, so in theory should spin equally well in both directions > if both sets of blades have equal mass and drag No it is still the case with coaxial heli's as only one set of blades changes speed. It is quicker and easier to slow down a set than it is to speed them up. Thus all CX2's will rotate fater one way then the other. Yes, technically it is a different reason ..... but same effect as other heli's >>>>> Kevin <dontemailme@ntlworld.com> wrote in >>> news:RGLNj.68714$jH5.60310@newsfe3- [quoted text clipped - 29 lines] > speed them up. Thus all CX2's will rotate fater one way then the other. Yes, > technically it is a different reason ..... but same effect as other heli's that makes no sense, if for example to turn one way it slows the top set down and to turn the other the bottom set slows down, if all things are equal why would one set slow down quicker? in a stable hover both sets need to rotate the same speed, correct? and to turn if you only slow one set down the lift will decrease and the helicopter will drop which it does not seem to, if anything the direction it turns faster in one motor speeds up more SignatureKevin R Reply address works > >>>>> Kevin <dontemailme@ntlworld.com> wrote in > >>> news:RGLNj.68714$jH5.60310@newsfe3- [quoted text clipped - 37 lines] > helicopter will drop which it does not seem to, if anything the > direction it turns faster in one motor speeds up more I never said " to turn one way it slows the top set > down and to turn the other the bottom set slows down"......... I am told by the expert at my local hobby store that only one set of blades changes speed. Slows down and speeds up. That makes sense as all CX2's yaw one way faster than the other. The CX2's do drop, if you rotate (yaw) for couple secs it loses altitude What the OP describes is the same as every CX2 I've seen (a few) so I was just telling him there is nothing wrong with it (he rec'd advice here to play with the 4 in 1 propo trimpot because it yaws one way faster than the other, and I doubt that is necessary, it is normal). >>>>>>> Kevin <dontemailme@ntlworld.com> wrote in >>>>> news:RGLNj.68714$jH5.60310@newsfe3- [quoted text clipped - 44 lines] > by the expert at my local hobby store that only one set of blades changes > speed. Slows down and speeds up. not the case if you hold full rudder and apply power only one set of blades move, hold the rudder the other way and the other set of blades rotate and if you move the rudder back to central one set speeds up the other slows down, try it before you have enough power to take off and you can see That makes sense as all CX2's yaw one way > faster than the other. > The CX2's do drop, if you rotate (yaw) for couple secs it loses altitude [quoted text clipped - 3 lines] > play with the 4 in 1 propo trimpot because it yaws one way faster than the > other, and I doubt that is necessary, it is normal). SignatureKevin R Reply address works Mine does it too, but after I had to make adjustments to the mix. When I first got it, I had to apply full trim to try to keep it from rotating and it still did not stop it from turning that direction, so stick had to be applied too. (So I thinks it's BS that they say that it was flown and checked out at the factory as claimed) Anyway, I adjusted the mix and it now hovers a good 10 seconds without input & trim centered. But ever since I did that, the pirouettes in the one direction I adjusted to are a wild blur, while the other is a lot slower. My next issue to battle is forward flight. I'll give it full stick forward and it takes off, but then slows to almost a hover while I have the stick still maxed out. The only way I can keep forward momentum is by constantly increasing & decreasing a tiny bit of power (about one click back and forth) Swash Plate is adjusted right....Anyone got ideas to correct this? (Sorry to hijack the thread a bit, but it's still on topic!) :) IYM > OK I know its a toy but do all balde CX-2's rotate quicker 1 one direction > than the other if you apply full tail/rudder ??? I agree. It does have to do with the electronic speed controller. If you want to get rid of it (or at least minimize it), you need to adjust the gain and proportional pot screws on your 4-in-1 enough so that no trimming is necessary in your rudder trim knob on your transmitter. |
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