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AXI Motor - esc question

Old 09-19-2005, 03:33 PM
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Default AXI Motor - esc question

I need advise, I am new to electrics except for the basic speed 400 stuff with castle creations esc.

I have an Ascent Glider that utilizes the speed 400 motor / sprite 25 esc / 1100 mah battery. Not the performance I prefer to get me up into thermals more times than 2

I have purchased:

AXI - 2212/26 outrunner motor and the graupner 9x5 folding prop.

Which ESC do I need for this motor? None of the hobby stores will give me a definite answer - almost leared from the question.

I am under the impression I need an ESC around 20 - 25 amps??

The motor states a currency draw efficiency of 6-12 amps??

Thankyou for your input, I would love to go fly it!!

Jeff
Old 09-19-2005, 04:46 PM
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Default RE: AXI Motor - esc question

Castle Creations will serve you again with the Phoenix 25 for brushless.
Old 09-19-2005, 06:13 PM
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Default RE: AXI Motor - esc question

Thanks for the quick reply - I went to take a look at that controller, seems like it might be a good choice, saw another one though and want to know if it too will be sufficient??

E-Flight 20 Amp Brushless
Continuous Maximum Current: 20A

I am running two micro servos off of the BEC.

Thankyou, jef
Old 09-21-2005, 07:45 PM
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Default RE: AXI Motor - esc question

Ok, need some input here, I went from a brushed 400 blah motor, 8x6 and 1045 Mah battery.

To a brushless - AXI 2212/26 with a graupner 23-12 - 9x5 with the eflight 20 amp speed controller and a 1045 battery.

When I bought the stuff yesterday, they told me it would be bolistic, straight vertical for 15 seconds to altitude.

Performance was marginal at best. The only difference was the battery lasted longer with the brushless and I got a little higher.

What is the next $100.00 step to get it to run with more torque and a little faster? My battery is 3 years old but still holds a good charge.
Do I need something like a 2000 Mah battery to get the motor going. I do not know about amps being drawn or anything like that, or how to figure it out. I do have a volt / amp meter if you tell me what setting to have it on.
I do know that after a 10 minute flight, The battery, speed controller and motor were all cold. Had no heat on anything.
I am leary of Lipo batteries due to the crud people have put on this site about blowing up and I only have a MRC Superbrain charger.

I am not even sure what to call the cells in my pack to order a new one. It has 7 cells and they are bigger than a AA but smaller than a c cell, SUB C maybe but seem smaller than that?

I would appreciate any input as my little $69.00 plane just turned into $200 + and still is'nt up to par.

Please forgive the rambling, I am a little perturbed.

Jeff
Old 09-21-2005, 08:25 PM
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Default RE: AXI Motor - esc question

7cells=8.4volts = a 2 cell lipo battery. All the AXi motors I've seen need a 3 cell lipo to really come allive.
Old 09-21-2005, 09:25 PM
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Default RE: AXI Motor - esc question

Thanks for the reply GWR - Can I not get any performance with a higher mah rated Nimh battery?

If I was to go buy a 3 cell Lipo, How would I go about it at Say Batteriesamerica .com

Link to there Lipoly batteries page - http://www.batteriesamerica.com/newpage8.htm

I haven't the fogiest Idea what I am looking at, It also states 3 cell poly batteries are running 11 volts?

I have limited room as well. What Voltage is the AXI rated too as well as the speed controller..

Keep in mind, I am a gas flier, this is my first attempt at electric stuff.

Much appreciated, Jeff
Old 09-22-2005, 10:30 PM
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Default RE: AXI Motor - esc question

Can someone please tell me what batteries I can utilize for this setup,

Axi 2212/26
20 amp E-flight ESC
Graupner 9-5" folding prop.

I am running a Nimh 1040. Not good enough.

Would like to know of Lipoly applications as well as subC Nimh higher, say 2000Mah applications. without adding weight.

I am completely unfamilier with batteries. Need answers for previous post as well. I do not want to burn up this thing and going out of town next weekend.
Please give me part numbers, websites etc.
Limited space for Nimh battery and if used - would prefer thinner lipo packs if applicable.

Thankyou, []
Old 09-23-2005, 05:32 AM
  #8  
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Default RE: AXI Motor - esc question

I fly an Axi 2212/34 motor, it is similar with your's but has less rpm/volt. It's a typical 3D motor.
I fly 12x6 or 11x6 props, I use a Jeti 18A controller, and 3 cell lipo's (1 pack 910 mAh and 1 pack 1250 mAh). I can hover around (at 1/2 throttle) for 10 min at the least. With the 1250mAh I get 15 min easy.

Choose Lipo's that can deliver at least 15C (for 910 mAh battery, the current is than 15 x 910 mAh = approx. 14 Amps.), that's more than enough for the axi.

I think your prop is a littlebit too small as well. Get a 10 x 4 or so.

Hope this helps you.
Old 09-23-2005, 09:01 AM
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Default RE: AXI Motor - esc question

Check out this web page:
http://www.modelmotors.cz/index.php?id=en&nc=produkty_vypis&kategorie=m_neodym_ac&id_rady=axi_22&id_produktu=axi_2212_26&nazev_rady=Series%20AXI%2022&hmotnost_rady=(24,5%20-%2057%20g)

It's the manufacturer's data for that motor, and it's nearly dead-on accurate. Close enough for government work, anyway...

What's "not good enough" about the performance with 1040 NiMH? If you go to Sub C cells, the plane will be way beyond too heavy to fly!

With that prop setup, a 3S pack of ThunderPower 1320 or a 3S pack of Kokam 1250 (15C) should power it easily.
Old 09-23-2005, 05:40 PM
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Default RE: AXI Motor - esc question

Ok, here is is some oictures, everyone likes pictures.

Take a look at the photo of the battery?? What cell size are they, not Sub-C and not AA ?????
The pack is 7 cells, 3 long and 1 across the end, It is only 4 1/4" inches long. It is 1050 Mah.

@ wvl - This is where I get a little confused I do not know what 15C is. Is it 15 amps of current.

The setup I have is not a foamie, It is a glider, Different weight. Those foam 3d planes are way lighter than what I have.
I think I found what I need with your direction.

@ Matt Kirsch - Took a look at the site, makes a little more sense, "What's not good enough" is that I am spending a couple of minutes trying to get up above 60 feet with the setup, I would like to be able to turn the throttle up, go 10 - 15 seconds up a couple of hundred feet maybe and glide around. Having the ability to do this more than twice.

The thing that got me was when I bought the speed controller and brushless motor, the guy at the LHS said "it would be bolistic, vertical enough for you"

I get it done and it is the same as before, just a little longer run time but still practically falls immediatley back because of weight of the battery and no elevation made.
Now I am under the impression that this little Diversity models 1050 mah nimh Sport pack is not enough current or amps or ?? to run the motor correctly.

I would like to go with lipos if they are lighter.

I think Now from what everyone is saying, I need a lipo battery to make it run up like I want.

Here is my choice for charger - Hobby Lobby - Smart Charger for 1-3 Li-Poly Cells ..... $ 29.90
Here is my choice for battery - 3 Cell 1250 mAh Pack FM12503 Kokam 3 Cell 11.1V, 1250 mAh Li-Poly Battery Pack ..... $ 55.50

Hope this will get this plane cranking,

Let me know, Jeff



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Old 09-25-2005, 09:27 AM
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jw637362
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Default RE: AXI Motor - esc question

Here is an update, I went ahead and purchased a Thunder Power Lipo charger and a ElectriFly 1500 Mah 3 cell lipo / 3s1p battery
11.1 volts.
Took it out to the field and launched - specked it out for the first time in 2 years with motor. glided around for awhile and brought it down to check everything out, not even warm - went up a couple more times, as far as I can tell, I have unlimited altitude with this configuration and I can go up and down all day long on a single charge.

Total cost for the Ascent Glider power experiment:
Original costs for initial setup
Ascent Glider - $69.00
2- Hitec hs55 - $36.00
Castle Creations Sprite 25 - $ 25.00
Diversity Models 1050 MAH pack - $38.00

total = $168.00

Items to make it a great powered plane, performance I was looking for:
Graupner 9 x 5 folding prop - $16.00
Axi 2212/26 Brushless outrunner - $69.00
E-flight 20 amp brushless controller - $39.00
Electrifly 1500 Mah 3 cell lipo - $45.00
Thunder power Lipo 12 v Charger - $50.00

total = $219.00 Total for all - $387.00

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