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08-23-2011 | 08:01 AM

#19

Gairlochan

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From: QLD, AUSTRALIA

RE: Setup Tips for your MCPX

Hello All,

My first post on this forum …

I just just got an mCPX RTF, my first foray into RC for about 35 yrs. This thing is a lot different from flying a big fuel-powered plane around in circles on the end of some bits of string…

It didn't fly at all out of the box… so much for them being test-flown at the factory prior to distribution. Once I'd finally found out the correct technique for binding a non-computer transmitter and got the thing bound, it wouldn't take off and hover, but just kept falling over; no stability at all. All servo pushrods were level with each other and the swashplate looked level, but even when launched gently from the hand, it just flipped over and crashed, no matter how much trimI did or didn't use.I returned it and asked for it to be looked at and asked also ifI could trade the included DX4e fora DX6i, asI wanted to be able to alter its handling characteristics and, initially, to tame it somewhat, being a beginner (apart from playing with my son's cheap flybar-style heli, and also heli and aeroplane flight simming on my Mac, even simulating a few RC models, which is sort of weird now thatI come to think of it … though a lot cheaper).

Anyhoo, nowI've set up the DX6i to factory defaults for the mCPX andI can at least get the heli off the ground (way off the ground, usually :-), thoughI've yet to get it to hover steadily — may try lowering the pitch settings in the transmitter to 40 or whatever works, asI want to fly it inside ultimately, without too much grief.

Rob, thanks for the heads up on the servo pushrods: the pitch on my blades was very negative out of the box andI had to wind the pushrods 3 turns anticlockwise to level the blades out at zeroed transmitter settings; two turns wasn't enough for mine. That was what finally got the heli flying, though it's a handful and I'm still having trouble with getting it to hover.I knowI shouldn't have got an expert level vehicle straight away whenI've had so little experience, butI had only one chance to get one and one only and, being a biker,I really wanted something which would lean into turns ;-). GuessI'll grow into it…

Btw, has anyone found a way of tying some sort of fine fishing line to those cyclic/blade pitch pushrods to prevent them from vanishing into the grass when they pop off during a crash? I've lost two already andI haven't even got the thing flying happily yet. Surely something could be done … tying them to each other, to the rotor hub or to the two spare knobs on the upper ring of the swashplate assembly (the two that they're not already clipped onto)… just a pair of small, loose leashes of fine fishing line? Would there be any problem with doing this? They come off more easily and frequently than anything else, they costAUD$1.50 each and they're almost impossible to find once lost…

As for the blade grips which were in need of replacement, how do you tell if you've got the new ones or the old ones?I only just bought mymCPX, but who knows how long it may have been on the shelves down here in Australia… IfI need them changed, how wouldI go about it down here? Rob? Any other Aussies?

Best,

Lachlan

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