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Hi Guys,

Need Your Suggestion on correct ESC as it was Burnt:

I had been flying with 1800 mah battery in this AXN FLoater Jet plane without any issues. But i tried yesterday with the 2200 mah battery, at half throttle it looked okay, but  with full throttle , smoke started and ESC was burnt with all the ic s on the esc board melted.   However we crash landed the plane with out any issues and got the battery disconnected immediatly.  

I believe the problem was 2200 mah battery whereas the esc was 18 or 20 amp rating. i am learning flying the hard way. Now scouting for a good esc with 30 amp rating.

Please share your suggestions on the ESC selection as well as How to Program it, what is the importance of Throttle cut, low voltage cut off  ...programming ESC boards with just sounds. ( I really struggle when it comes to hearing those strange morse kind of sounds).

Regards,
Ram G

Technically using a 2200 mah battery in place of a 1800 mah battery should not cause any such thing.Since the voltage is same and only the mah capacity of the battery should only result in increased flight time.

Hmmm, unless the 2200mah one is significantly heavier, this should not be happening. 

But then, with such low end combos, not sure what exactly was intended in the first place in terms of continuous full throttle usage.  It is possible that such usage was not supported at all, and somewhere in the documentation (or not!) it would be mentioned that the ESC only supports max current for 5 or 10 seconds.

Normally, you do not have to program the ESCs, and defaults work well enough.

Unless you put a 4S 2200 . I think the HobbyKing supersimple 25 amps should do. But if you want a better quality go for turnigy plush series 25/30amps or the turnigy sentry series if you want to save the battery as well from overdischarging.

Ram ,
I don' think changing just the ESC to a higher rating will do .
For some reason your power system has drawn more amps than it is intended to .
Changing to higher ESC  will ensure ESC  does not  burn due to higher amps draw  so possibly then the next weak spot will burn that in all probability will be the Motor  since the battery can deliver  the required current  .
Check if the motor is having some sort  of resistance to movement or is it free when you rotate by hand .

I personally don't think   the source of the problem lies in the ESC  check the entire system out .

Sai

Thank you mates,

The 2200 mah battery was definitely heavier than the 1800 mah battery.  The plane was struggling to move forward in the wind  ,( we could not fly that fast , as it was on the first day ). That is when my brother pulled the Full throttle well like for 30 seconds may be..when it happened.. I am sure the plane was struggling to carry the weight.[ we had a themocole protected pen cam, then carbon rodes, as well as lot of bubble covers. [may be this is what they call as heavy ??] ..  Well i will get a 30 amp Esc from chennai to fix and fly this next weekend.


Regards,
Ramkumar G

Take this as a lesson in not overloading the plane, and on better throttle control. 

Many ESCs very clearly say that "average" load is X amps and "peak" amps support is Y amps for N seconds.  Keep this fact also in mind while you are flying.

This also shows why a wattmeter is a must have instrument for electric flyers. With a wattmeter one could measure how much current is drawn by the motor at various throttle points and also helps select the correct propeller.

Quote from: anwar on January 16, 2010, 10:59:58 PM
Take this as a lesson in not overloading the plane, and on better throttle control. 

Many ESCs very clearly say that "average" load is X amps and "peak" amps support is Y amps for N seconds.  Keep this fact also in mind while you are flying.

Not only this, It is always advisable to have a motor/ESC combination that would never get burnt even in full throttle all the time for the selected/used prop. This eliminates all the damages of a crash/burning things up. I don't think the weight would go up by a lot by selecting a slightly Higher powered ESC/motor for the given prop.

Quote from: Rao on January 17, 2010, 01:56:01 AM
This also shows why a wattmeter is a must have instrument for electric flyers. With a wattmeter one could measure how much current is drawn by the motor at various throttle points and also helps select the correct propeller.

This is the first thing I ordered in my life. Very very useful. I visit Hk see the user reviews for a particular motor I brought. After seeing the reviews, I would have a fair Idea on how many watts/amps I can take this motor to. Apart from that, I aways give full throttle for few seconds, stop and check the motor temperature, then increase the throttle duration for few more seconds and repeat the check.... and so on.... till I am confident what prop this motor can take easily.

Note that crashing a plane is more expensive than spending a little more on a better/Slightly bigger motor/ESC.

Hope this helps.

A similar model.  This is really "torture" testing !

Hi Team,

Is it possible to have "ELEVON Mixing" on this type of Plane. i have a the left aileron and right aileron with "Y" connector , plugged to channel 1[ Mode 2].  When i tried to set the elevon mix, it would not work, and the servos are always in the opposite direction. 

I was just trying to have an increased control for my "Elevators".

regards,
Ramkumar G

This kind of mixing requires each servo to be independently controlled, so a Y cable setup will not work.  If your receiver has more than 4 channels you can try this, although I am not sure what the effect would be when you do elevon mixing of ailerons on a plane that has a separate elevator already   

I am sure the experimentation would be quite interesting, so please do report after you have tested it out.

Also, have you tried the simpler solution of moving to linkage rod to the farthest hole on the servo arm and closest hold on the elevator side ?  This should give you the maximum possible elevator throw with the existing setup.

Quote from: jerryazhakathu on January 06, 2010, 11:37:52 PM
Try not to use the glue it came with. I always had bad results with the glue they send. And also,it is usually a slow curing glue. Just a suggestion

Our experience is that if we let the glue stand and cure (we did it overnight), then it works very well.  I got another AXN for a friend, and used the same glue.  Even after nose in crashes, everything is working very well.  Just wanted to let people know before they tried to kill themselves looking for alternate glues.

As reported earlier here, the wings do tend to get loose over time. 

So we will be using Duct tape (or Duck tape http://www.octanecreative.com/ducttape/duckvsduct.html !) from one wing to the other (two strips, on top and the bottom) to hold them in place permanently. That way, if we need to remove the wings for anything, we can just cut the tape open.

What the HECK?
http://images.google.co.in/images?rlz=1C1GGLS_enIN291IN305&sourceid=chrome&q=duct%20tape&um=1&ie=UTF-8&sa=N&hl=en&tab=wi

http://images.google.co.in/images?um=1&hl=en&rlz=1C1GGLS_enIN291IN305&tbs=isch:1&q=duct+tape&sa=N&start=21&ndsp=21

http://images.google.co.in/images?um=1&hl=en&rlz=1C1GGLS_enIN291IN305&tbs=isch:1&q=duct+tape&sa=N&start=42&ndsp=21

lol. Duct tape indeeed has a variety of usage worldwide !

My brother's 10 year old son flew perfect circuits the first time around on this plane (his second every flight).

On the other hand, it looks like the ESC is just barely enough, as we had a case where a friend flying it in high winds at high throttle for many minutes together resulting in the ESC cutting out.  On no/low wind days, absolutely no problem with good throttle management.  We are upgrading the ESC on one of them at the field to a 30A one.

I received my copy of AXN yesterday after a long wait of a month.

Observations
1. This is among the best VFM (value for money) products from HK. $ 90 shipped to India with almost everything! Nicely packed but the bubble wrap inside had lots of dust as if the model was on display wrapped inside bubble wrap!!
2. Static test with stock 5x5 Prop and the 2200kv BL, 3S/1050mAh/40C Rhino - 150Watt/15Amp. Motor - Cool, ESC - Warm.
3. I heard some whinny noise on full throttle so slowed down. Later while packing back, I found that one of the BL magnet came Loose (HK is consistent with loose magnets on this BL!).
4. The Servos linkage on the Wing is not 'straight' the rods where bending. Much of this bend is attributed to annoyingly stiff Ailerons.
5. The Rudder Servo 'Rises' - both the Elevator/Rudder servos need gluing.
6. Despite nice packing, there were few 'Dimples' on the wing/fuse (2-3). Nothing serious
7. The ESC look cute with see thru wrap and decent heat sink.
8. Any having some alternative Decal design which I can get cut at Auto sticker guys ?

Now Questions
1. WHERE the HELL to find SIM for AXN ? None of the G4.5/XTR 5 model are talked about even on RC group!
2. What to use to glue the motor magnets ? 5min Epoxy/Slow cure Epoxy/LockTite/CA ?
3. Would like to replace the ESC. What ESC people have changed to ? 25A/30A ?
4. Would be Re-Hinging all the control Surfaces. What to use ? Tape , Pin hinges ? I have lots of hinges with me. Some suggestion what kind hinge be good for AXN.
5. Servos look real cheap. Is there a point in changing them with HXT 9g?
6. What about Reinforcement with Fiber tape all over the leading edges and belly ? Also a 3x2mm CF tube on the Elevators ?

Waiting for reply from existing AXN owners!

2.  I think most people have been using CA.
3.  Fly it stock, and change it if you feel the need.
4.  Again, fly it for a few times, and then re-hinge. Use whatever you feel like, pretty much any of those should work.  I would avoid cutting or inserting pins into the foam.  Remember that you don't have to "pin" the "pin hinges", you can secure them with a small quantity of the right type of glue (I use epoxy anywhere and everywhere!).
5.  The servos seem to work fine. Again, don't change unless you feel the need.  I did pour in some of the glue that came with the AXN into the sides of the servos.
6.  Duck tape (the one that usually comes in dark gray color) seemed to work better than fibre tape on this material.

2. Metal to metal bond strength for the common CA we use is very low. There are CA that is made for metal application, but they are expensive. At those prices you might as well buy the loctite that is meant for these type of applications. I used green loctite (can't remember the number now) in my DIY brushless motor days and it worked out great. There is way more than what I'd use in a bottle, you are welcome to borrow if you need. Hope it is not past expiry date.

Good old epoxy works very well. Particularly, Araldite KLEAR.

Quote from: ujjwaana on June 23, 2010, 07:47:47 PM

Now Questions
1. WHERE the HELL to find SIM for AXN ? None of the G4.5/XTR 5 model are talked about even on RC group!
2. What to use to glue the motor magnets ? 5min Epoxy/Slow cure Epoxy/LockTite/CA ?
3. Would like to replace the ESC. What ESC people have changed to ? 25A/30A ?
4. Would be Re-Hinging all the control Surfaces. What to use ? Tape , Pin hinges ? I have lots of hinges with me. Some suggestion what kind hinge be good for AXN.
5. Servos look real cheap. Is there a point in changing them with HXT 9g?
6. What about Reinforcement with Fiber tape all over the leading edges and belly ? Also a 3x2mm CF tube on the Elevators ?

Waiting for reply from existing AXN owners!

1) You dont need a sim to practice such a difficult to fly plane. You need to have a license and 1000 hrs of experience from a commercial airliner to fly this.

2) Candle wax hold excellently. Better you know how an inland letter is struck? 

3) There is a 12S 100  A ESC at hobby city should handle the load.
YOu need a motor as well. The 130 KV motor from HC should do.  suggestd prop - 27 X 14

4) Ya, use the Tape that you got from RCD and put 3 layers of it. Better dip the whole plane in Epoxy.
5) Use some good futaba digital metal gear BL servos that can handle 20 to 30 KG torque. .10sec / 60 degrees.
6) Re Dipping the plane in Expoxy after the first coat dries in step 4 should help to a large extent.

7) Dont forget to order some 12 S 5000 mah lipos, a 400 watts charges comes in handy too!

Sorry I dont own a AXN Floater yet. I tot I will suggest something useful.