Martyn Perks Posted November 11, 2009 Share Posted November 11, 2009 Anybody got any thoughts on the erratic behaviour of the tail on my raptor 30? When in smart lock mode sat in the hover it is initally stable, then it atarts oscillating left to right building up rapidly out of control. adjusting the gain (CSM420) has no effect and when in conventional mode all is well and the machine is quite flyable, just a little shiver from the tail in fast forward flight. The gyro is new, the tail servo is a hi tec digital and the machine hasn't been crashed...yet. Have been flying for some years now and have run out of ideas, as i have no problems with other machines. Any thoughts? Quote Link to comment Share on other sites More sharing options...
Robert Bromwich Posted November 11, 2009 Share Posted November 11, 2009 Hi Martyn just a few things to check ,is there free and easy movement on the tail linkage also what speed is the servo ?? as these gryos need a fast servo otherwise u get tick tock robEdited By Robert Bromwich on 11/11/2009 16:00:00 Quote Link to comment Share on other sites More sharing options...
Martyn Perks Posted November 11, 2009 Author Share Posted November 11, 2009 hi rob yes the linkage is a quick uk upgrade on the boom with a carbon rod for actuation. The servo is a hi tec HS 635HB Thanks Quote Link to comment Share on other sites More sharing options...
Robert Bromwich Posted November 11, 2009 Share Posted November 11, 2009 Hi have you tried this compo before as i would say that the servo isnt fast enough for that gyro as servo is just a standard high torgue one not a fast digital servo so this will cause the gyro to over work the servo and so start the oscillation rob have just looked up the servo on servo shop and this servo isnt fast enough for that gyro you need it about 0.08 seconds to 60 deg where this servo is 0.18 sec which is 2 times slower try this servo Hitec HS-7966HB this is 0.08 to 60 deg @ 4.8v that should be fine Edited By Robert Bromwich on 11/11/2009 16:39:44Edited By Robert Bromwich on 11/11/2009 16:43:47 Quote Link to comment Share on other sites More sharing options...
Martyn Perks Posted November 11, 2009 Author Share Posted November 11, 2009 Thanks rob will try that- knew money would be involved- always is with helis! Quote Link to comment Share on other sites More sharing options...
Robert Bromwich Posted November 11, 2009 Share Posted November 11, 2009 money is always involved but have a good look around first i.e ebay etc for cheaper servos also if you are thinking about a digital servo just check that the gyro can use them first which i think it can but please double check as will not work if it doesnt i will have a look around for standard size digital servo for u and post them on here if i find any cheapish one rob Quote Link to comment Share on other sites More sharing options...
Martyn Perks Posted November 12, 2009 Author Share Posted November 12, 2009 Thanks rob Been to LMS today and bought Align Ds620. hopefully that will sort it out. will post update when installed and tested. Quote Link to comment Share on other sites More sharing options...
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