Hey guys, 

I started to play with the 4s battery on my build, and reviewing the blackbox data, I see peak of about 5g. it looks like a lot (from my perspective) but how much a quad can go on a decent build ? 

 

Good question! I also wonder how reliable the acc measurement is, but the graph looks pretty constant, not much noise it seems...

Personally i never checked what my quads do, but i'm curious now

I guess it is quite reliable as the FC use it for level mode flight

Graphing acc(Z) in a punch-out is a good way of seeing how powerful your craft is.

One of my most powerful craft will hit 5.87g vertical acceleration a few moments after starting to climb straight up at full throttle. This is actually a vertical acceleration of 6.87g when you account for the fact that it's already fighting against -1g from gravity.

That is more powerful than mine:
ESC 4x1 blheli 30a
2205x2600kv
frame 215 Genius realaac
weight wihtout battery 378g (+110g 1500mah 3s battery)
SPRacing F3
Bullnose 5045 dual blade propellers

I´m working on a new build here (QAV250) from china, where I got 2205x2300kv motors.

Anyone know what would be the actual difference between the 2300kv vs the 2600kv ?

I mean, these 2600kv are already delivering a nice punch, is there any recommendation on this you could share ?

thanks !

The 5.87g comes from my Cricket 225L build. There, I'm using RacerStar 2205 2300kv motors, Dalprop 5045 V2 triblade props and 4S power.

On my ZX5, I'm using 2204 2300kv motors, 5045 bullnose props and 4S power. That can manage 5.03g. With 300kv less than you have. The difference is in the weight. My ZX5 only weighs 315g without battery and the battery I use is a 1300mA/h 4S which weighs just 150g.

A 2600kv motor compared to a 2300kv motor is going to give you more thrust, but at the cost of significantly higher current, especially at full throttle. I have some RacerStar 2205 2600kv motors spare, so I'll put one on my thrust stand later with the 5045 bullnose prop and see what thrust I get. I already have my own data for the 2205 2300kv motor with the same props, so it will make for an interesting comparison.

(20-Jun-2017, 07:29 AM)unseen Wrote: The 5.87g comes from my Cricket 225L build. There, I'm using RacerStar 2205 2300kv motors, Dalprop 5045 V2 triblade props and 4S power.

On my ZX5, I'm using 2204 2300kv motors, 5045 bullnose props and 4S power. That can manage 5.03g. With 300kv less than you have. The difference is in the weight. My ZX5 only weighs 315g without battery and the battery I use is a 1300mA/h 4S which weighs just 150g.

A 2600kv motor compared to a 2300kv motor is going to give you more thrust, but at the cost of significantly higher current, especially at full throttle. I have some RacerStar 2205 2600kv motors spare, so I'll put one on my thrust stand later with the 5045 bullnose prop and see what thrust I get. I already have my own data for the 2205 2300kv motor with the same props, so it will make for an interesting comparison.

Hi unseen, 

Do you think 2205 2300kv are more effective than the 2205-2600kv for "non-insane" flight in terms of battery autonomy ?
At the point I´m now this is more important than a little extra punch.

I´m working on a QAV250 build with this 2205-2300KV (ReadyToSky), so chinese generic.

I like my motors with higher kV (old Tigers 2500kV and rcx 2633kV) but only with light 2-blade 5045 props, otherwise they draw too much current and don't deliver the promised rpm's anymore...

With those props the flight time is pretty normal.

(21-Jun-2017, 02:08 AM)flabombarda Wrote: Hi unseen, 

Do you think 2205 2300kv are more effective than the 2205-2600kv for "non-insane" flight in terms of battery autonomy ?
At the point I´m now this is more important than a little extra punch.

I´m working on a QAV250 build with this 2205-2300KV (ReadyToSky), so chinese generic.

It depends what battery you power them with and which props you use.

I run the 2205 2600kv motors with Cyclone triblades on my Armattan Armadillo and find that it flies just fine with 3S power. 4S would be absolutely insane and would also draw lots of current at high throttle.

So, if you want longer flight times, you can either use less aggressive props, or use a 3S instead of 4S battery. It's always a balancing act though. Sometimes, having loads of extra power in reserve can be the only thing that will save you from a crash!

(23-Jun-2017, 10:03 AM)unseen Wrote: It depends what battery you power them with and which props you use.

I run the 2205 2600kv motors with Cyclone triblades on my Armattan Armadillo and find that it flies just fine with 3S power. 4S would be absolutely insane and would also draw lots of current at high throttle.

So, if you want longer flight times, you can either use less aggressive props, or use a 3S instead of 4S battery. It's always a balancing act though. Sometimes, having loads of extra power in reserve can be the only thing that will save you from a crash!

It makes total sense Unseen, the best I have here in terms of autonomy with decent power is using 5045 Bullnose on 3S.
Moving to 4S the battery last about 30% less.

i just completed a new build with LittleBee 20A ESC + 2205 2300kv (ZMR250) I want to test it to see how it behaves !

Thanks

There are so many choices now when it comes to building a new quad. It's part of the fun trying out different combinations of motors, power and props and seeing how they affect performance.