Tiger 2814 (aka Avroto, QC, Quadpower, etc.) max lifting experiences?

[Bartman]

Hi all,

I'm just curious, what are you guys actually using these motors for? Back when the whole XL craze took over the multi-rotor world, a lot of people just automatically went to the 2814's for their "Heavy Lift" helicopters. I suspect mine are barely breaking a sweat on my coaxial quad that weighs in at about 11.5 pounds (just under 1.5 pounds per motor) using MK BL 2.0's without heat sinks.

the Tiger website claims they're good for up to 2150 g (4.75 pounds) so that would equate to almost 38 pounds of total lift on an oktokopter. Using the rule of thumb to have the helicopter weigh no more than half of total weight that still makes for a nineteen pound helicopter.

I'd like to see what people are actually using them for and with what ESC's please.

Thanks,
Bart

 

[DucktileMedia]

I tried asking the same in this post:

http://www.multirotorforums.com/showthread.php?3127-best-motor/page4


Seems the specs for the Axi 2814/22 engines are comparable to the avrotos.

I need to know the answer to this soon, so any help would be greatly appreciated.

 

[DucktileMedia]

Bump! c'mon. someone on here knows the truths behind these things. Come out and let yourself be heard!

Tiger 2814-10 $50
Avroto 2814-11 $60
QuadroPower 3328 $90
MK 3638 $100
Axi 2814-22 $115


Clearly the Axi is its own motor. but the rest all look VERY similar and have very similar specs.

 

[Kari]

Bump! c'mon. someone on here knows the truths behind these things. Come out and let yourself be heard!

Tiger 2814-10 $50
Avroto 2814-11 $60
QuadroPower 3328 $90
MK 3638 $100
Axi 2814-22 $115


Clearly the Axi is its own motor. but the rest all look VERY similar and have very similar specs.

I have 6X QC3328, 6X Tiger 2814-10, and 6X Torxpower 2216. QC3328 looks very much identical to T-motor 2814-10, also from inside but because of lower KV i believe it's same as T-motor 2814-11. Why QC3328 is spec to 6s capable and T-motors only 4s i really don't know. Torxpower 2216 are obviously same as Tiger 2216-10.

But, i think these Tigers, rebranded or not are fantastic motors. Very good price quality rate, well balanced smooth running motors. Only complain is some people have had lots of faulty bearings. I've had my first faulty bearing last week, but multicopter.co sent me new motor for free of charge as they did not had bearings in stock at the moment.

If you end up Tigers or any of the rebranded ones, i recommend to buy 1 or 2 motors for spare if you are unlucky with bearings. Also if you like you can always replace bearings to these for example: http://www.bocabearings.com/productdetail.aspx?ItemID=21489&MODSYSID=9226&ProductSubGroupID=160

Kari

 

[Bartman]

Kari,

Thanks for the info. Some of the bearing problems people are having I think are actually dirt between the magnets and stators. If you blow dry compressed air down through the motor, often the "bearing" noise will go away.

Having said that, I've also used Boca for replacements and they work great.

Bart

 

[DucktileMedia]

The reason I am curious is not to know if one is better than the other but more to know that the specs of my octo with T-motor 2814's will be sufficient enough to lift the av200/360//5d i got. Truth is, I have no reason to lift a 5d as I think its one of the worst cameras to lift on a heli. The T2i does just as good a job and is cheaper and lighter. BUT, when on the last set, they insisted we use a 5d and handed us one like it was chewing gum. So I want to be prepared. When I see many droidworx/cinestar spec sheets, they list axi 2814-22 or the QC 3328 motors. What confuses me is that the specs on Tmotors site is less than all the rebranded ones that apparently are identical. ???

 

[Twister773]

Subscribed

 

[Bartman]

c'mon guys, i know it's flying season in the Northern Hemisphere but can't we compile some info here? Maybe someone who knows how to put an excel spreadsheet online can post something here for people to fill in with weight, ESC ratings, prop lengths, etc.

thanks,
Bart

 

[jes1111]

To add my €2-worth...

The Avrotos, Torxpowers and Quadpowers are all definitely made by RCTiger. Whether they use the same winding, bearings, etc. I can't say. The top of the bell on the Avrotos is a different design to the RCTiger standard, but that's probably of no significance. I believe RCTiger use EZO bearings as standard, which are a high quality Japanese-made item. They may get damaged during assembly and their QC doesn't pick this up but I've been advised by experts that EZOs are "as good as you can get for that application". The Boca "exotics" are undoubtedly top performers but then so are their prices!

The MK motors are made by Danlions/Pulso, as are the Cobras that Innov8tive sell (although Innov8tive claim their bearings are larger - probably a worthwhile advantage). Pulso showed a lot of early promise but they don't seem to have captured the market (direct or OEM) as RCTiger have, so one might doubt their long-term commitment/viability.

I think the choice comes down to price and to which supplier you want to deal with. And the advice above to have spare motors on hand (and spare bearings back in the workshop) is sound.

 

[Bartman]

thanks Jes

who made the RObbe Roxxy motors? how come they haven't benefitted more from their relationship with MK?

they seem to be excellent little motors, mine are still going (though not much lately)

 

[Bartman]

just for some perspetive regarding large motors, i had an original Mikrokopter Okto II with the 110W Roxxy motors. Those eight little motors carried nearly the same load I"m now carrying with my eight Avrotos/TIgers. I'm considering powering down to something in the 200w range for my next-gen craft. a 350 w motor is overkill for an 8 to 12 pound craft if you ask me.

most of the XL heli's out there should actually be called ML (medium lift).

for example, this motor weighs 75 g

http://www.clubheli.com/Tiger-Motors-MT-2216-800KV_p_3581.html

the 2814-10's weigh in at 120. on an okto that's more than 3/4's of a pound difference. i'm trying to find out if they can take 4S power.

 

[DucktileMedia]

The #1 question I had in mind was if the T-motor (or equivalent) is comparable in output to the Axi 2814-22's everyone seems to recommend in their specs for stock heavy lift applications. It's nice to know which motors are what and I am sure this thread will piss off a few companies trying to pimp their own laser etched name on the same cookie cutter motor but......

I am having a hell of a time deciding between using Bart's XY8 for a dual operator rig as to going flat octo. Knowing I am going to lose some power in the coaxial configuration makes me worry I may not be able to lift the load in a motor out situation. I realize most of our helis are capable of lifting a massive amount of weight, but we dont really want to be pushing our equipment to its max day in day out. We ideally want that perfect 50% of your thrust/weight ratio.

 

[Bartman]

y6uri,
personally, i think the 50% rule of thumb is too conservative and would guess 65% or a little more is probably fine.
to answer your question, list everything on the heli you're contemplating. be as specific as possible and then try to determine weights for each item. get yourself with 5 or 10% of what the weight will be and go from there. if you're in the 14 to 15 pound range I think the Tiger 2814's will be fine. over 15 and you might want to go to the flat Okto although the other considerations that go with that, like needing an SUV to transport it versus a compact car with my XY8, are substantial.
folding frames, frames that disassemble, etc are overkill if most all of your work is going to be within driving distance.
Bart

 

[jes1111]

I just did some fiddling in eCalc. I set up a 5kg (11lb) craft with eight motors, 4S power, 13x4.75 props on Axi 1814/22 motors. Why 13x4.75? Because that happens to bring the hover throttle to exactly 50%. Now if I change the motor count to "7" (all other variables remaining unchanged) the hover throttle rises to 57%. In terms of maintaining lift, this is still perfectly viable.

Changing the motor to a Tiger MT2814-10 (770kV) (with the same 13x4.75 prop) changes the hover throttle to 42% with all eight motors and 49% with seven. Other than indicating (within the +/-15% error margin quoted) that the Tiger might be a more "efficient" motor (interesting!), it also demonstrates a more-than-sufficient safety margin on lift.

Try setting up your theoretical craft in eCalc and see if you get similar results.

 

[holco]

Maybe this clears things up

Same as Avroto

Axi 2814/22

For me the winner

 

[DucktileMedia]

THANKS Jess! A major weight off my back ( no pun intended). If it weren't for the 360 gimbal I would say Bart's XY8 is hands down the best configuration of any. next thing to figure out is if lowering the av200 another few inches to clear the view of the lower props will negatively affect the flight characteristics. I saw a video a while back of a guy flying a Red that must have been 1-2 feet below the heli and it flew amazingly well. But in windier conditions this added surface area will have some effect.

Thanks for the input guys, all great info.

 

[ghaynes]

Jess can you do the ecalc as a PDF? JPG is unreadable.

Gary

 

[jes1111]

Fixed

 

[Dewster]

I use Avroto 2814 11s. I obtained the motor sizing based on Droidworx's specs for their builds. My Hexa's total weight with Sony Nex 5n camera is about 7 pounds:

Youtube:

http://youtu.be/IeA_1ofl-8o

 

[Pablo74]

my v8 droid with boom 465mm
axi 2814/22
esc 60 opto flyfun
dji
13x6.5
cam mount 360 1400gr
cam sony 730
2x4s 5000 40/70c

total 6750gr
View attachment 5059