Techniques > How to...
Choose an electric power setup?
selleri:
That size of a plane should easily fly on 3S, any bigger and you're just adding weight and expense!
This one with a wingspan of 182cm flies on 4S and has plenty of power.
Happy Days:
Looks to me like Black Horse Liberty 182 :-\ Selleri, and I agree with you entirely vis the power train needed.
So, a motor of something like a 2826/12 would do you fine David. (28 = the diameter of the outrunner's rotating 'cylinder'. 26 = the length of the 'cylinder'. 12 = the number of turns of wire on each of the motors internal coils) The above should produce around 3-400 watts of power and have a rpm per Volt of around 8 or 900. (rpm/V)
Also you need to make sure that the shaft of the motor will fit the 10x6 electric prop. If it doesn't you may need a prop adapter to do the job. You will also need some method of securing the motor to the firewall of the model.
A brushless ESC with a BEC capable of min 3S and handling around 40 (or more safely 50) amps should see you right.
With 3S batteries of 2000mAh capacity you might find the flight durations are a little short, but if both batteries are of the same age and make you could connect them in parallel to make a 4000mAh set. If the batteries are in good condition that should give you about 12 -15 minutes flight time as a trainer. If you want to 'beat up the sky' with aerobatics expect half that flight time.
Sorted! :)
K.
selleri:
--- Quote from: Happy Days on June 18, 2016, 16:41:08 PM ---Looks to me like Black Horse Liberty 182
--- End quote ---
Keen eye mate!
angry_muppet:
Ok, I don't know these dark arts of motor selection, so based on what Keith has suggested there are three, two realistic:
Aerodrive SK3 3542-800kv 493W, 49A (Way too powerful? 8))
Turnigy G10 810kv approx 3540, 375W, 42A
Aerodrive SK3 2836-1040kv 335W, 12 turns, 28A (This would be it?) :)
It's like me and cars... I don't want to have "enough" power, I like to have an abundance of it. Then again, I did start off in a 85hp car... and worked my way up :D I should bear that in mind!
So based on the SK3 335W unit, I'd need about a 45A ESC (round up from a 50% safety factor) to be safe?
And batteries... I don't have anything bigger than 2200mAh, and they're all different... :( So no joining up for me.
The question is, would it be worth purchasing both SK3s and basing the ESC on the higher draw, then I can replace the motor when I want to progress, or at the very least, purchase the higher rated ESC...
Happy Days:
I'd say the Aerodrive would suit, provded it can fit into the airframe and you can find an appropriate prop to fit the shaft. :-\
If one of the other motors can be fitted into your model then yeah, try one of those if you want. I can only repeat that (I.M.O.) it's easier to learn to drive a low powered car, than it is to drive a high powered one. Bigger motors need bigger ESC's and bigger batteries which all adds weight and consequently makes the model harder to fly. Whether you can use the same equipment in subsequent models will depend HOW MANY times and to what extent they get damaged WHEN you crash the trainer :-[. Flying aeroplanes, even flying them acrobatically, is more about subtly, than "peddle to the metal". ( Any fool can do that. )
Keith.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version