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Old Aug 12, 2011, 08:53 PM
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United States, PA, Erie
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Originally Posted by windfou View Post
can i use bigger props with my 2830-14 rc timer motor? like 11x4.7 apc or 12x4.7
Yes you can use 11.4.7 props on those motors as long you are using a 3 cell lipo. I have ben doing it for a long time with out any problems.
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Old Aug 12, 2011, 09:11 PM
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United States, TX, Thrall
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Hey Jet Two Michael64 here have you tried any of the Graupner E 11x5 props. Claimed here to have the less vibs of all.

Michael64
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Old Aug 12, 2011, 11:22 PM
multi rotors,foamies,car lover
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Quote:
Originally Posted by JET MAN TWO View Post
Yes you can use 11.4.7 props on those motors as long you are using a 3 cell lipo. I have ben doing it for a long time with out any problems.
Quote:
Originally Posted by Michael64 View Post
Hey Jet Two Michael64 here have you tried any of the Graupner E 11x5 props. Claimed here to have the less vibs of all.

Michael64
thank you i will try them also the graupner props are looking good

can i have a link i want to buy them but i can't find a website
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Old Oct 16, 2011, 05:54 AM
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Avroto-M2814 800g ~7A

RCTimer BC3536/11 800g ~7A

Looks like RCTimer has same performance as Avroto, but RCTimer is 2,5x cheaper. Am I right?
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Old Oct 20, 2011, 06:57 PM
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Originally Posted by evvaldis View Post

Avroto-M2814 800g ~7A

RCTimer BC3536/11 800g ~7A

Looks like RCTimer has same performance as Avroto, but RCTimer is 2,5x cheaper. Am I right?
maybe cheaper but the weigth of the 3536 rc timer is 2x , but for a low budget like me i will go with the rc timer

but for long lasting i will go with the avroto , i don' think the rc timer can hold 4s for a long period
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Old Oct 22, 2011, 03:44 PM
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Why 4S? No idea who spread this misconception that high S is good, because for efficiency is not.
BL motors are not efficient at low curents, such 3536 class motor best efficiency is in the 10-15A range.
Look at the MT2814 test results table, the higher the voltage, the lower the efficiency
http://flyduino.net/T-Motor-MT2814-710KV
You should go to 4s only if you really need that thrust, but, who need 2kg per arm ?

Other criteria is props max rpm, the props used in copter are in the 6-7000 range maximum. APC 10" SF for example is 6500.
750kv * 11V is already more than 6500
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Old Oct 23, 2011, 01:42 PM
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Originally Posted by RENATOA View Post
Why 4S? No idea who spread this misconception that high S is good, because for efficiency is not.
BL motors are not efficient at low curents, such 3536 class motor best efficiency is in the 10-15A range.
Look at the MT2814 test results table, the higher the voltage, the lower the efficiency
http://flyduino.net/T-Motor-MT2814-710KV
You should go to 4s only if you really need that thrust, but, who need 2kg per arm ?

Other criteria is props max rpm, the props used in copter are in the 6-7000 range maximum. APC 10" SF for example is 6500.
750kv * 11V is already more than 6500

the reason why some use 4s is for reducing vibration they use smaller props ,smaller props are more easy to balance but need more rpm to obtain the same trust with a bigger props also and also for better stability when you descend fast and cause less drag
my next set up will be with 4S but with avroto motor for long lasting
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Old Oct 23, 2011, 02:06 PM
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Romania, Dolj, Craiova
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Got it.

Question: what about Tiger motors?
They looks as a duck, walk like a duck, quack as a duck... but 2/3 price of avroto...
I see flyduino started to sell them as premium motors, are they or not the real mfr of avroto ?
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Old Oct 25, 2011, 05:57 PM
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Wow what a great resource for everyone. Thank you for taking the time to do this. This will help us all immensely when assembling our next multicopter
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Old Nov 01, 2011, 06:06 PM
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Thanks to holco for this interesting thread.

My participation :
Motors :
- Flycam 925KV
- Turnigy Park 450 890KV
- T-Motor MT2216-10 900KV
Propeller : GF 10x4.5
ESC : Hobbywing Pentium 30A
Battery : Turnigy nano-tech 3300 mAh 25-50C

Flycam 925KV :





Turnigy Park 450 890KV :





T-Motor MT2216-10 900KV :





My test bench :



More to follow.
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Last edited by Mortimer; Nov 02, 2011 at 09:22 PM.
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Old Nov 01, 2011, 06:27 PM
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Quote:
Originally Posted by RENATOA View Post
Got it.

Question: what about Tiger motors?
They looks as a duck, walk like a duck, quack as a duck... but 2/3 price of avroto...
I see flyduino started to sell them as premium motors, are they or not the real mfr of avroto ?
Yes, they are the same!
But I actually find this Tiger more interesting:
http://rcflight.se/visaprodukt.aspx?id=1656
Look at the efficiency numbers...
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Old Nov 01, 2011, 06:30 PM
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Great tests guys.

I find Mortimer tables more user friendly to read, because rpm is not relay useful data. For me most important is W to g.
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Old Nov 01, 2011, 06:54 PM
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Quote:
Originally Posted by RENATOA View Post
Look at the MT2814 test results table, the higher the voltage, the lower the efficiency
http://flyduino.net/T-Motor-MT2814-710KV
No, No and a big No. You can't use those tables to say that higher voltage gives lower efficiency. They are more or less using full power on each voltage level and efficiency is of course lower for a higher wattage output/higher trust level. The only thing those tables are good for is comparing efficiency at different TRUST levels. (And to get max trust at different voltage levels)

The only way to compare efficiency at different voltage levels is to measure the wattage at the same trust level but different voltages.

Quote:
Originally Posted by Farmer_Joe View Post
I find Mortimer tables more user friendly to read, because rpm is not relay useful data. For me most important is W to g.
I agree, great tests but really hard to read the graphs. Including g/W (or W/g) would help a lot.
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Old Nov 02, 2011, 09:25 AM
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Originally Posted by Malx View Post
Including g/W (or W/g) would help a lot.
Good idea.
It's done, look at the graphs above.
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Last edited by Mortimer; Nov 02, 2011 at 09:24 PM.
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Old Nov 19, 2011, 01:34 PM
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United States, CA, San Jose
Joined Jul 2009
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What prop is GF 10x4.5 supposed to mean? Do you mean Glass Fiber MPI EPP1045's?
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