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Archive for June, 2018
Posted by kiwi_craig | Jun 17, 2018 @ 04:16 AM | 9,422 Views
Picked up a cheap 250 CFX that needed a bit of a going through. Motor had tired bearings and squealed like hell in idle up and several other little gremlins tweaked feathering shaft, slight tweak in the tail tube and sloppy feathering shaft bushes. Chassis / servos / canopy all mint.

Motor - ran okay just sounded terrible in idle up, had a high pitched squeal out it went, pulled it down and yup both bearings notchy as hell and showing signs of wear on the shaft - time for a replacement.

In with a Turnigy 2627 - 4200kv. went up one size on the pinion - 13t to counter the minor drop in Kv value 4500/4200 x 12t = 13t and went with a steel lynx gear - nice. The Turnigy motor comes in a nice plastic case with plug ends, shrink-wrap and a spare main shaft and a couple of 0.5M pinions - 11 and 9t.

https://hobbyking.com/en_us/turnigy-...___store=en_us

Initial run up was nice, then down the park and the main motor esc gave up....... this is the third blade 2 in 1 I've had smoke the main motor circuit, had a 200 SRX go, then my 230S went out and now this one in the 250 CFX. No warning fine one minute - stop the next and the ESC is smoking hot......... I'm figuring they are crappola quality wise in the main motor circuit components........

Another aspect I really hate in the 230 and the 250 is the mule kick these esc give on start up. this is why so many people have hassles with these things tipping over on spool up.......... I did my own 2 esc...Continue Reading