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Old Jun 24, 2012, 09:50 PM
manual flying apologist
Adidas4275's Avatar
United States, CA, Fresno
Joined Mar 2011
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I have seen the numbers for 2814 700-770kv motors on 4s and most that I see show 11x4.7 and 12x3.8 are highly efficient and put a lot of thrust.

I also have 2216 800kv on 4s with 10x4.5 and they output a decent amount of thrust

That might give you a ballpark.

Both are used to carry a Sony Nex5 in Y6 frame type.
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Old Jun 25, 2012, 12:01 AM
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United States, LA, New Orleans
Joined Jun 2012
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Thanks for the info! I'm thinking just fork out the extra cash for avroto's or the sunnysky 700kv's. Your 2216's don't get hot on 4s with 10"?
Is it just me or are the avroto and the RC-Timer BC-3536/11 (750KV) VERY similar? What would the advantage of avroto be here?
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Old Jun 25, 2012, 12:10 AM
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Quote:
Originally Posted by Lyyar View Post
MT2212 750KV has about 600g thrust (3S and prop APC 10x4.7)
see table at the end of this link:
http://rctigermotor.com/show.php?contentid=145

6x600=3.6kg

but at least at 50% of thrust you should start to hover, so ... 1,8kg-2kg us max for you copter.

2500g / 6 motors = 416g per motor at 50% thrust, so I will try to find motor with 900g of thrust at least. I suggest something around 1000-1100g for comfortable flight. For instance MT2216 800 or 900 or 1100KV

L
Quote:
Originally Posted by RENATOA View Post
As above, if you don't have clearance for 12" prop, go for higher kv motors.
Or think to 4s.
thx for your advise, do you think with 2,5kg AUW 2x3cell 5000 mah 10x4.7 prop
what will you reccomend between MT2216 800 ,900 or 1100 kv?
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Old Jun 25, 2012, 12:35 AM
manual flying apologist
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United States, CA, Fresno
Joined Mar 2011
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you are going to fly 2x5000mah packs? that is a TON of battery!
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Old Jun 25, 2012, 12:40 AM
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Quote:
Originally Posted by Adidas4275 View Post
you are going to fly 2x5000mah packs? that is a TON of battery!
i dont know how many flight time if im using 1x3cell 5000 i just assume 2x3cell 5000 make it to 3cell 10000mah iwill get longger flight time, but its just my plan now im flying with 1x3cell 5000
anyone know how much maximum thrust DJI 2212 920kv motor with 3cell and 4cell?
and which one between MT2212 and DJI 2212 can handle more payload?
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Last edited by voltaren; Jun 25, 2012 at 05:26 AM. Reason: add question.
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Old Jun 25, 2012, 01:29 AM
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United States, LA, New Orleans
Joined Jun 2012
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Anyone know about the iPower 2814Q? It's cheap, long wires, and 750kv. Any opinions on that one?
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Old Jun 29, 2012, 06:30 PM
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United States, NH, Londonderry
Joined Dec 2006
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Low cost motors for high performance DJI F330..?

I'm thinking about maybe building a smaller Quad (DJI F330)...

Of all the motors listed in this thread (or any others) what do you guy's recommend for low cost/max performance motor(s)? The DJI F330 frame can only run 8" props..so any motor selection would have to run well with that size prop.

Thanks,
-mike-
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Old Jun 29, 2012, 06:54 PM
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United States, CA, Glendale
Joined Jan 2012
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sunnysky X2216 1250kv?

http://www.himodel.com/electric/SUNN...ess_Motor.html

Apart from the collet prop mount. I love these punchy motors.

phil
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Old Jun 29, 2012, 07:28 PM
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Joined Apr 2010
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My last test, 2 motors and 10 propellers.

Turnigy Park450 890KV 150W - 28mm diameter - 65g
and Park480 850KV 250W - 35mm diameter - 78g
I like these motors, I use them for many months.

10 propellers: APC 8x3.8, 9x4.7, 10x4.7, 11x4.7, 12x3.8, GemFan 10x4.5, Graupner 10x5, 11x5, GWS 9x5x3 and HK 10x6.

Turnigy Nano-Tech 3S 4000mAh 35-70C
Hobbywing Pentium 30A - Timing mode: Middle
Turnigy Servo Tester and Micro Tacho, GWS Servo Tester MT-1
Junsi PowerLog 6S Wattmeter - LogView software - Soehnle scale
These measuring devices are not lab grade but are suitable for a comparison.

Tests have been made in two steps:
1 - Half throttle, most significant, usually used for hover
2 - WOT, maximum thrust and current
The Turnigy Servo Tester used has a fixed center position giving a 1.486ms pulse. Max pulse is 1.976ms.

Here is what I've got:
Best efficiency with 890KV 150W motor on 3S : GRAUPNER 11x5
and with 850KV 250w motor on 3S : APC 12x3.8

Hoping it will be useful for somebody.
My previous test : hexTronik DT700 and 24 propellers





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Last edited by Mortimer; Jun 30, 2012 at 09:55 AM.
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Old Jun 29, 2012, 08:51 PM
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Joined Jun 2011
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Quote:
Originally Posted by aForcefulThrust View Post
Anyone know about the iPower 2814Q? It's cheap, long wires, and 750kv. Any opinions on that one?
Got them recently. Can't tell you much about them because the only experience I had before with brushless was with the DT750.

1) cheap indeed
2) long wires confirmed
3) nice,true prop adaptor with out of ballance "spinner nut" (problem solved with 6mm nuts)
4) bought 4, one had faulty bearings unfortunately. The other three run VERY smooth!!
5) use them on my AUW 2.3kg quad on 4s lipo with jxf 11x5 wooden props and get plenty of power, i hover @ 50% throttle
6) visual inspection gives me the impression of good quality.
7) got them directly from iPower in China and their customer service is excellent!

8) they are smooth
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Old Jul 01, 2012, 04:01 PM
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Joined May 2012
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I am using the Avroto M2814-11s V3 on my quad, the problem I'm running into is that the motors act like they are not getting enough juice when I give it alot of throttle. It's much worse on 4s than 3s. The balleries are Zippy 45c 5800's and the esc's are HobbyKing 30a blue series. I'm not sure if it's the motors, esc, cotroller refresh rate, etc..

Has anyone else seen this in their testing?
David
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Old Jul 01, 2012, 05:32 PM
Hairy Hampster.
Australia, VIC, Barwon Heads
Joined Apr 2012
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Quote:
Originally Posted by macanaw View Post
I am using the Avroto M2814-11s V3 on my quad, the problem I'm running into is that the motors act like they are not getting enough juice when I give it alot of throttle. It's much worse on 4s than 3s. The balleries are Zippy 45c 5800's and the esc's are HobbyKing 30a blue series. I'm not sure if it's the motors, esc, cotroller refresh rate, etc..

Has anyone else seen this in their testing?
David
Have you programmed the ESC`s David?
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Old Jul 01, 2012, 06:13 PM
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Joined May 2012
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They hae deafult settings.

Lipo
RPM - Off
Start - soft
brake - off
timing - auto
cutoff volatage - 3.0
cutoff power - reduce

David
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Old Jul 01, 2012, 06:30 PM
Hairy Hampster.
Australia, VIC, Barwon Heads
Joined Apr 2012
147 Posts
Quote:
Originally Posted by macanaw View Post
They hae deafult settings.

Lipo
RPM - Off
Start - soft
brake - off
timing - auto
cutoff volatage - 3.0
cutoff power - reduce

David
There is a programming card you can buy for the Blue series David.
http://www.hobbyking.com/hobbyking/s...dProduct=13431

MIght be worth a look.
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Old Jul 01, 2012, 11:27 PM
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Joined May 2012
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Have it already, gonna try changing the cut off to 2.8v and set the timing to low. If that doesnt do it i'll nail it to the ground and set the cut off to Stop. If the motors stop then it must be an ESC issue as the Naza says voltage is fine.

David
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