Originally Posted by windfou

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.

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

Originally Posted by JET MAN TWO

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.

Originally Posted by Michael64

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

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?

Originally Posted by evvaldis

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

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

Originally Posted by RENATOA

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

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 ?

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

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.

Originally Posted by RENATOA

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...

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.

Originally Posted by RENATOA

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.

Originally Posted by Farmer_Joe

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.

Originally Posted by Malx

Including g/W (or W/g) would help a lot.

Good idea.
It's done, look at the graphs above.

What prop is GF 10x4.5 supposed to mean? Do you mean Glass Fiber MPI EPP1045's?