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Old May 29, 2012, 04:47 PM
Zombie flyer....
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United Kingdom, Huddersfield
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Art tech EC135 Co-axial

Recently bought one as my first (ish) heli. Second hand, but dirt cheap, so thought I'd give it a go. 1st problem, massive vibration on startup, eventually sorted with fiber tape to balance the blades. Now reasonably stable.
2nd, No lift. the heli somes with a 1600mah 3s lipo, which doesn't do much.
Swapped for a 2200 3s 35c turnigy. Lifts off, but only for about 20 seconds.
Any suggestions as to what i can do to rectify this?
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Old May 29, 2012, 04:51 PM
Cranky old fart
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Germantown, WI.
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Replace the motors. Buy extras, if you can find them.
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Old May 30, 2012, 01:18 PM
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United States, MN, Otsego
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Bananahobby sells art-tech and also bltizworks RC is many times a rebadged art-tech heli.

They carry parts for the "blitzworks EC135" here: http://www.bananahobby.com/electric-...31--parts.html

Check out the heli under 4 ch beginner helis and look at the specs, rotor diameter etc. I think you may well find that they match those for your art-tech heli.

Good luck,

Jim
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Old May 30, 2012, 01:20 PM
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He's in the UK.
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Old May 30, 2012, 02:53 PM
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My apologies for not noticing that.

Here is a link on rc-fever.com. They ship to the uk. These motors (both come in the package) are for the EC135 370 version: http://www.rc-fever.com/arttech-at44...t-p-14978.html

They also carry the motors for the 400 version.

Reasonable prices.

I have an Art-Tech coaxial myself (redwolf) so I have search the entire internet for spare parts for these things

For the 370 version the art-tech part number is 44171 (or AT-44171)

The 400 version motors are: AT-4k121: http://www.rc-fever.com/arttech-at4k...t-p-15251.html

You might also put the part number for whichever one you need into google. You should find quite a list of parts providers.

Hope this is more helpful.

Jim
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Old May 30, 2012, 03:12 PM
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Thanks very much for the help provided!
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Old May 30, 2012, 03:18 PM
Cranky old fart
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I'm glad jcmors knew where to look, I sure didn't. Remember, buy spares... they don't last.
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Old May 30, 2012, 03:23 PM
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As a further question - is there anyway to check/ test the gyro? I only ask as when I have had it in the air, I cannot get it to hover. Checked and adjusted the linkages to the swashplate, so it's level. Also adjusted the pot so the rotors turn at the same speed, but it seems to wobble off here and there with any sign of altitude.
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Old May 30, 2012, 04:03 PM
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Germantown, WI.
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Worn motors would contribute to that, as the gyro is trying to compensate. They can also burn out the FETs on your board, so be careful.
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Old May 31, 2012, 10:38 AM
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United Kingdom, Huddersfield
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I have 2 graupner speed 400 motors in my Rc planes spares box. Could I use these, or do I have to buy the art tech ones? I'll solder the Art tech connections on to them.
If I can, will I need a pinion puller, or are the small gears held with a grub screw?
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Old May 31, 2012, 11:48 AM
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If memory serves me, the old speed 400 is very comparable to a 370 motor. The Art-tech pinions will require a puller, can't say if a speed 400 does.
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Old May 31, 2012, 04:25 PM
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Disaster. Dunno what I've done, but it's dead. Fiddling with it, spooling it up, stopped dead.
Hmm...unplug, replug....nope.
Check PCB. Small red LED, very dim. Remove throttle and rudder connections from RX, lights go back on.LED now bright. Plug in Throttle. Goes dead.
Plug in only throttle and rudder - it works! spools up, etc. Add elevator servo. dead....
any ideas?
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Old Jun 02, 2012, 05:17 PM
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Blade strikes

I just picked up an art tech MD500. Read another forum that said it was mechanically the same helicopter as the EC 135. I have found that the blades for the e-sky big lama are identical except for the screw hole to mount them to the rotor head. Was wondering if anyone new if the Extended shaft for the Big Lama is compatible with the MD500/EC-135? As for toffa sorry to hear about your troubles. If you isolated the failure to a given servo I would suspect a short there but beings it doesn't seem to matter which servo or speed control is unplugged I would suspect a bad board in the RX maybe even a short between the different connectors. I am an aircraft mechanic but it has been years since I dealt with the electronics side of things.
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Old Jun 02, 2012, 06:45 PM
Cranky old fart
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Germantown, WI.
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Art Tech PCB is not real durable so toffa's latest problem is not unexpected. The extended inner shaft from the Big Lama should work, if the flybar and blade holders will do. You don't have any other of options any way, might as well try it.
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Old Jun 03, 2012, 02:53 PM
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United Kingdom, Huddersfield
Joined Mar 2010
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No longer any issue with the art tech EC135 - I've returned it to the shop whence it came,got a refund, and have now bought a blade msr from ebay.
Probably needs a new thread, but, anything I need to know/ watch out for on this micro machine? From what I can gather, it's a good little starter heli, just a little more advanced than a co-axial.
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