so i am on my first attempt at building my own design 3d print rc plane and i bought a cheap kit off of alliexpress and i have a 2212\6T 2200kv brushless motor, 40a esc (5v\3A) , with 6035 props. so my question... i have a 2600mah 3s battery 25c and a 3000mah 2s battery 25c. which should i use? or should i buy a different one that will give me better performance? if so what do i buy? i was aiming at over 10 minutes of flite cuz i will put a fpv camera on it. i should end up at roughly 30 in wingspan. i wonder if this contraption will even fly?
help with battery options
- Thread starter jimlane06
- Start date
Thanks for the answer. So... I was designing a particular spitfire ( Messerschmitt bf 109) and that 30in wingspan was the biggest i could go easy proportionate wise to the plane. If going bigger i would have to redesign it. So anotger question. Do you think the 30in would be too small to fly good? Or the 40in i woukd be making better use of my eletronics? Idk if that makes sense
Houndpup Rc
Legendary member
30" will be best for you electronics though a 40" would be easier to fly.
Houndpup Rc
Legendary member
Though i think a smaller battery would be better...Like a 850mah 3s.
Oh ya makes sense. Thanks bro
Houndpup Rc
Legendary member
No problem
Have fun!Ok im still building it and might take a while to finish but ill keep that in mind. Ill probably be back with more questions b4 its done lol
Houndpup Rc
Legendary member
You might be able to squeak 10 mins out on a 1300mah 3s but keep in mind that the heavier you go that harder to fly and also you won't get better flight times because you will have to use more throttle. How people get really long flight times is they use a really efficient slow flying setup.
Houndpup Rc
Legendary member
Sounds good!
I do have a bigger motor which i was debating using it or getting two smaller ones and making something bigger like 40 or above. Something down the line of a bomber. What would be better for bigger planes single or double motors?
Houndpup Rc
Legendary member
I think with the size of your motors you could to expect some around 40in wings span....Maybe 50. What is the size of your bigger motor?
I
I could be wrong but is there brushless 4500kv? If so i think thats what it was. But i couldnt tell you for sure. I had bought it for a 3d rc car. And i cant check it rn...
Houndpup Rc
Legendary member
Yeah you are probably right on the size...So a thing to know about motors is with those higher Kv's you get higher rpm's...But less torque power...So you spin small (Like 3") props really fast and that's good fro small racers but the lower kv motors usually spin bigger props (Like 10-12") and for a bigger plane you want bigger props because they can "grab" the air better.
So
So for my bomber i would want like how low kvs? Looking at 50 in mab. And so is kv related to how big around a motor is? Like i really slap a bigger prop on a smaller motor? I think you can see im really green at this lol
Houndpup Rc
Legendary member
Don’t worry—it took me a long time to figure out motor sizing too. But it’s actually super simple. The first two numbers refer to the stator diameter, and the second two refer to the stator height. So, for example, in a 2306 motor: 23 means 23mm wide, and 06 means 6mm tall. The KV rating tells you how many RPMs the motor produces per volt. Hope that makes sense....
Shurik-1960
Elite member
There is a rule for beginners in aircraft modeling : 1. Make an aircraft model 2. Install all the control mechanisms 3 .weigh the model 4. Add the weight of the battery and regulator 5. Select the engine according to thrust, taking into account the coefficient (1:1, 1:1.25- trainer, 1:2- aerobatic and higher for high-speed flights) .Everything that is done according to these rules flies.
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Alright the fog is starting to clear now. Makes sense. Thanks a lot everyone for the replys
Ok ill check that also and see how it turns out
Shurik-1960
Elite member
If you communicate with us on the website, you can use the Internet. There are recommended values for any engine on the internet. The era of homemade devices for determining engine thrust has long gone down in history. Here is a selection of engines and their characteristics : http://rc-aviation.ru/?option=com_rcbase&view=motorlist&task=search , http://rc-aviation.ru/?option=com_rcbase&view=motorlist . Google Translator and God help you.
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