RE: Walkera Dragonfly #36 (Full Version)

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grant365 -> RE: Walkera Dragonfly #36 (8/13/2005 2:27:56 AM)

I also replaced the Walkera servos with Hitec HS-55's on my #36. They appear to deliver a quicker more precice response (my subjective POV) and have also reduced the slop. The standard walkera servo arms have holes that are too large for the control rod. I have been able to get a snug fit with the new Hitec servo arms.

I have had no problems with the Walkera 180 brushless motor and 30A ESC so far. Hope I havn't jinxed myself!

Any tips on how to loosen the belt tension?





chrishelicopter -> RE: Walkera Dragonfly #36 (8/13/2005 11:15:23 AM)

i would like to buy a new heli from Walkera.

Anyone can tell me, Walkera #36 (after upgraded brushless motor) or Walkera #39 is better?



sparkling_fist -> RE: Walkera Dragonfly #36 (8/13/2005 4:53:30 PM)

buy a trex.



stoogy -> RE: Walkera Dragonfly #36 (8/14/2005 3:42:07 AM)

I just bought a Bladerunner on Ebay for 20 bucks.! what an awesome micro heli, (comes complete with everythig u need)
I already moded it and i flew it in my living room. I should have bought this heli instead of my Walkera 36! LOL i would have saved $230..!



sparkling_fist -> RE: Walkera Dragonfly #36 (8/14/2005 6:34:43 PM)

lol..



Andy Rigby -> RE: Walkera Dragonfly #36 (8/14/2005 9:58:08 PM)

The stock motor on the 36 is absolute sh1te. I got about 3mins flying on mine b4 it got hot and the brushes got worn away.

I spent about 3 hours setting it up, and in the short 3mins i was very happy with it. NO vibration and it did what i wanted it to do. I have the 2200mah lipo and this seems fine charging to a total capacity of 1970mah on the first charge.

Over all i'm very happy with it, but chuck the motor in the bin and at the very least get a graupner S480.

One question for you all, i've ordered a walkera brushless motor and controller, but just wondering if a pinion comes with it, if not has anyone bought a pinion in the UK which suits????

Thanks Andy



sparkling_fist -> RE: Walkera Dragonfly #36 (8/14/2005 10:03:24 PM)

i donno what the pinon is but im guessing its the teeth part thing right?
but even if its not..
your supplier should send you what you need to attach it to the heli.



stoogy -> RE: Walkera Dragonfly #36 (8/14/2005 10:23:11 PM)

Use your old pinion, it should come out with a pair of plyers.
I have the brushless walkera motor and ESC and they work fine. The 36 is a knock off the shogun, just about every part is interchangeable so its no doubt it will fly fine and perform execpt for the the electronics.
actually since I bought a new Li-po and charger haven't had any probs at all. Everything works fine and I get 7-10 mins flights also I upgraded the blades to carbon composite, I bought 2 pairs so if anyone wants a pair I will ship them in the US for $22





sparkling_fist -> RE: Walkera Dragonfly #36 (8/14/2005 10:32:35 PM)

i see no need for the carbon blades..
the foam ones are extreamly strong as they are..

you can use ur pinions but if you need another pinion.
http://www.allerc.com/index.php?cPath=68 sells pinions..

i like that site.
i can buy what i need to make a rc paper aeroplane..
if any1 has any advice about the paper aeroplane.. please tell [:D]



rotarypower3 -> RE: Walkera Dragonfly #36 (8/15/2005 5:48:10 AM)

Heli-Fever have now got a vid of the #36 flying around and doing some flips.....
http://www.heli-fever.com/download/video/36_Test_3.wmv



jyc -> RE: Walkera Dragonfly #36 (8/15/2005 12:56:52 PM)


quote:

ORIGINAL: stoogy

Use your old pinion, it should come out with a pair of plyers.
I have the brushless walkera motor and ESC and they work fine. The 36 is a knock off the shogun, just about every part is interchangeable so its no doubt it will fly fine and perform execpt for the the electronics.
actually since I bought a new Li-po and charger haven't had any probs at all. Everything works fine and I get 7-10 mins flights also I upgraded the blades to carbon composite, I bought 2 pairs so if anyone wants a pair I will ship them in the US for $22





A comparison with my Trex, I found out that the tail assembly is identical to the Rex. Actually, the #36 is a combination of the 35 (Shogun) head and #39 (Trex) tail.

I also noticed that the tail does not pitch equally in both direction? Has anyone noticed that? Any idea on how to correct this? As it stand, the left rudder does not have much authority, as compared to right rudder.



sparkling_fist -> RE: Walkera Dragonfly #36 (8/15/2005 3:28:30 PM)

it doesnt need to..
becuase the torque from the motor gives it the turn..

also how can we find out what that heli uses
cos i dont think mine will ever do that



rotarypower3 -> RE: Walkera Dragonfly #36 (8/15/2005 6:26:28 PM)


quote:

ORIGINAL: sparkling_fist
also how can we find out what that heli uses
cos i dont think mine will ever do that

Post a question in the link below and I'm sure one of the guys will answer. I do know that it runs NO walkera electronics. ;)
http://www.heli-fever.com/Forum/index.php



sparkling_fist -> RE: Walkera Dragonfly #36 (8/15/2005 8:34:16 PM)

no walkera electronics?
that must be the reason it flys well



imaginit -> RE: Walkera Dragonfly #36 (8/16/2005 1:29:08 AM)

andy,
pinion for t-rex perfectly match the walkera #36...it is even better...when you purchase a brushless motor it usually comes with it .....



art103 -> RE: Walkera Dragonfly #36 (8/16/2005 7:42:20 AM)

I've been quiet for a few day / weeks... Here's why!

The #36 is an excellent beginners helicopter.
Having read the whole of the #35 thread, and absorbed the information, as a complete newbie, I set up my heli, balanced it and took off.

(Ok, so I had had many hours on the SIM, and followed the set of 10 battery online lessons before take off).

I was limited initially to the 650mAh NiMh battery due to a fault with my LiPo.

After my first crash, the pitch servo smashed, the 5V regulator overheated (trying to drive the servo), and the helicopter exhibited the glitches everyone has been talking about.
While waiting for new blades, I modified a 486 heatsink to fix the glitch problem... Cheap prevention mechanism :)

Anyhow, helicopter all fixed up - time to give it another run.
I managed a full flight on the NiMh, without crashing! (3 mins ish).
All done outside, no glitches, and included some forward flight and lots of hovering (~3-4 feet up).
After landing, the heatsink was mildly warm - much better than the temperature was without it.
The motor was a bit warm though.

After cooling down, I let rip with the freshly charged LiPo (charged with a "Prolux Li-Po DC 1-3 Cell Charger" from www.alshobbies.com).
Bad move... The heli shot up into the air, about 10 feet high, so I had to control it from below.
Fatal crash ensued :(

From my experiences I learned a few lessons:
1) Helicopter balancing is everything - spend lots of time on this!
2) The electronics work fine if cooled efficiently
3) The Walkera servos are weak - replace them. (Walkera survived one crash, the new one has survived ~20 similar crashes so far)
4) Superglue and spare blades are your friends
5) Get used to a new battery before going in head first!

A photo of my home-made glitch preventer:
[image]http://artaylor.myip.org/~richard/helicopter/heatsink.jpg[/image]



Pubhi -> RE: Walkera Dragonfly #36 (8/16/2005 8:18:50 AM)

I am serioudly considering buying one off ebay. I can get one with brushless and lipo for $215 shipped. Does this sound like a good deal? Do you guys think its worth the plunge?



jyc -> RE: Walkera Dragonfly #36 (8/16/2005 1:47:48 PM)

do yo own your electronics? I would suggest buying just the kit with brushless (~$120) and install your own RX, Gyro, Servos, and Batt. You DONT want to have a glitch when your heli is 10ft high in the air!

or,

get one of the original zoom400 v2 with belt for ~130, shipped from FL

or better yet,

Get a TREX!



grant365 -> RE: Walkera Dragonfly #36 (8/16/2005 3:13:38 PM)

Been having a blast...unfortunately no video yet. I have managed to get off the training gear and am getting reasonably comfortable with hover.
- the walkera Tx controls are a bit stiff for hovering....I have loosened mine slightly by strecthing the springs inside the case a fraction
- I have also removed the 'click' from the throttle/collective stick to give finer control
- I have replaced all servos with Hitec HS-55's (and had to reverse the controls using the Tx dip switches because the HS-55's work in reverse)
- I flipped over the collective control arm so that it is better aligned with the HS-55 servo arm which does not sit a proud as the the walkera servo (the walkera assebly puts this on the wrong way IMHO)
- I have also used the Radd's 10 pack training method (www.dream-models.com)....and recommend it
- Been flying with a 1700mah and 2200 mah lipo....the extra weight of the 2200 really makes the heli a lot more stable in hover
- On my third set of blades now but fortunately with no major damage...first crash due to sheer inexperience...slid sideways into a wall, second crash due to a radio/mechanical glitch...heli pitched forward due to loss of cyclic pitch control. Getting good at rebuilding and trimming the heli.
- I can confirm that you should not wind the aerial around the tail boom stabiliser bars....the esc kept on resetting due to poor/loss of signal until I rerouted the aerial which immediately fixed the problem.
- Disposed of my faulty 2200mah lipo using the discharge, cut open and put in salt water approach....be extremely careful when doing this as the lithium reacts violently with the water creating a small fireworks display.
- Ordered a serial port sim cable from milehighwings which should arrive soon...so I hope to get some solid sim hours in.
- Did some minor mods to the tail rotor blade holder....the ball arms tend to rub on the central hub so I took them off and filed them a bit flatter which has reduced binding

I just had a the radio/mechanical glitch again....heli pitched forward due to loss of cyclic pitch control and did not respond to corrections from the Tx. Any suggestions as to what this is...my only guess is it could be intereference (mabe from my mobile phone) or dodgy electronics???? All connnections are secure. Here is my current setup....






rotarypower3 -> RE: Walkera Dragonfly #36 (8/16/2005 4:32:19 PM)

Walkera electronics have always been dodgey, but they do seem to be getting a little better.

If that's your antenna I can see at the back of the heli, then it's way too close to the esc. With a brushless setup the esc is the biggest sorce of radio interference and needs to as far away as possible to the reciever, antenna, gyro, servos and servo wiring. Basically away from everything. [;)]
Also keep the antenna unwrapped and at it's full length. Don't coil it around anything.

Here's some very interesting tests on rc antenna's http://www.rc-cam.com/ant_exp.htm

..



jyc -> RE: Walkera Dragonfly #36 (8/16/2005 5:02:28 PM)

I remembered one of the #35 strings mentioned that the crystal may be at fault. Have you tried using another pair of crystals?



sparkling_fist -> RE: Walkera Dragonfly #36 (8/16/2005 9:03:13 PM)

are all #36 with a yellow tail servo now?



stoogy -> RE: Walkera Dragonfly #36 (8/16/2005 11:09:11 PM)

Mine is ..! just got it 2 weeks ago



grant365 -> RE: Walkera Dragonfly #36 (8/17/2005 12:01:57 AM)

My aerial is unattached in the photo....it normally runs to the bottom tip of the tail and back. Thanks for the tip though ...I'll make sure it is well away from the ESC & motor in future. Still not sure if was an electric or mechanical failure....the walkera ball links are fairly loose and one may have popped off in flight. I tried to simulate the electrical fault while stationary on the ground but everything was completely steady. A quick experiment showed that interference from my mobile phone when it is close to my 35Mhz Tx does cause twitchiness in the servos but dosen't explain the complete loss of cyclic pitch control.




aurora799 -> RE: Walkera Dragonfly #36 (8/17/2005 1:08:58 AM)

I had the same problem the other day with my #36. It was hovering fine then all of the sudden it stopped responding while I was pitched back. Fortunatley the training gear cause it to land on the skids and it just slid into a wall damaging the only blades.

After reseting the heli everything seemed fin again (apart from a bit of vibration from the blade damage)

One of my servos (pitch) broke the other night. I just replaced all 4 with HS-55's.

I was hoping that the servos may be at fault. But it looks like you had the same problem with the HS-55s in.

I wonder if a heatsink on the regulator fixes the problem?

Art103 - Is this the glitch you were experiencing? or was yours just a momentary glitch?

RotaryPower - where would you recommend putting the antenna?

BTW
I've worked out why my roll/aileron does not move evenly. The pot in the transmitter is not centered. If I trim all the way to the left it gets even (but then I run out of trim). I'll have to pull apart the Tx and adjust it.




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