Hi everybody. This is my first time here, so I want to tell you about a proyect I have in mind. You know about this new trend, the shortboards, also called Penny boards? I find them very usefull for moving arround yo I want to have one electrified. I have never seen a similar proyect, everything I’ve seen is about longboards, but not this kind of boards, so is like I have no model to follow. First of all I have to say that I haven’t bought anything of the necesarry stuff for the conversion to e-board, so any advise or change offered will be taken in count. My budget, with the stuff I have in mind is about 150€. If the changes you suggest me make it far more expensive than that, I won’t take the proyect into reality. Sorry for that, guys.
This is the board I want to electrify: MODEL: Oxelo Yamba SHOP: Decathlon PRICE: 50€ IMPORTANT SPECS: Wheels diameter is 59mm It uses ABEC 7 (I don’t know the name of the piece in english but you know what I am talking about).
Probably is not the best board ever, but it is what I can easily adquire.
As this board is much smaller than the ones you usually electrify, I haven’t enough space for the drive-chain method you use. To solve that, I think I’ll do something like this: The motor body will be directly in contact with the wheel, instead of using a drive chain which I have no space for. In my case, to hold the motor, y was thinking to add a wood piece to the front os the board axis. As this part is completly flat, the wood part will fit well and I can fit at the sides of this wood piece the motors, and they will end over the wheel in the same way the link guy does. Instead of putting the metalic piece at the outside of the wheel, mine will be in wood and at the inside. I’m sorry but all this is in my mind only so I cannot uoload any pic.
I will use 2 motors, one for each front wheel. The motors I’ve chosen are these: MODEL: NTM_Prop_Drive_28_36_750KV_265W MAX AMPERS: 18A BATTERIES NEEDED: 3S-4S POWER: 165W RPM/V: 750kv
I know it is not the kind of motor used habitually, so I must explain why I choose them:
- They are CHEAP, really cheap
- They are small, only 28mm diameter, thats great for me, as the motors I’ve seen in other proyects are as big as my wheel here (59mm diameter)
- It is 750kv, I know it is too much, but with this size this is the lowest kv I’ve found. I’ll run it at 11.1V so that makes it run with lower rpm. HERE IS MY PRINCIPAL DOUBT WITH THE PROYECT: Despite I’m running two motors, what doubles the torque, will I have enough torque? I don’t want it to be the most powerfull board in the world, just enough to keep me moving at flat routes and to up little hills (maybe with some help). I’ve done the calcs and it can reach 86km/h at full throthle. (I won’t definetly push it so hard, it scares) but I know its torque will be rubbish. Will it be enough rubbish? That is the question. I repeat, I don’t mind hepling it to start moving or at some hills. Please if anyone knows, solve me this.
I continue with the rest of the parts The ESC chosen os this one: MODEL: HobbyKing 20A ESC 3A UBEC PRICE: 9,67 € CONSTANT CURRENT: 20A MAX CURRENT: 25A BEC: Yes Obviously I will be using two, one for each motor. It gives 20A constantly and a max. of 25A. My motor is suppossed to have a max of 18A so this ESC will be enough I think. It cames also with BEC, which I find usefull to use with the rc receiver, so I won’t need a different battery for it. This one has wide programming options so I am hapoy with it
The batteries. Here I need also a little bit of help. I’ve chosen these ones: MODEL: Turnigy 5000mAh 3S 30C LipoPack 5000mAh PRICE: 23,18€ CONSTANT DISCHARGE: 30C MAX DISCHARGE: 35C CAPACITY: 5000mAh VOLTAGE: 11.1V (3S1P) It has 5000mAh, 30C of constant discharge and a max of 35C discharge (only for 10 seconds). What I doubt is if the following calc is correct: It is 5000mAh, so in 1 hour it gives me 5A. But the specs say that it has 30C CONSTANT discharge, so I suppose it will work at 30C during the complete hour. So that gives me 150A for 1 hour. My motor has a max of 18A, but I will run it behind that almost all the time. DOES ANYONE KNOWS how many time will my battery last if I choose this one?
About the battery charger, I have no idea, any advise will be welcome
About the rc transmiter and receiver, I only need one channel. I was thinking to conect both ESCs to the same channel with an Y wire, as long as they must run both at the same speed always. The rc transmiter and receiver I was thinking to use is this one: MODEL: Hobbyking GT2E AFHDS 2A 2.4ghz 2 Channel Radio System PRICE: 14,00€ SHAPE: Gun Type The only question I have about this is the following: The release point of the trigger is at the middle. Will I be able to set the ESC to recognise the 0 speed when the trigger is completly pulled, and the max speed when it is completly pushed? It will be great because it will run at medium speed whitout having the finger on it, I will only need to touch it to brake or to enter the “turbo mode” as I call it. (remember my calcs set a max speed of 80km/h, so it is important not to use this “turbo mode” lol)
That is all my proyect, with this stuff I keep behind my budget Please feel free to advise me, opine or whatever you want. All the help is welcome. Thanks.
PS: My weigth is about 58kg, if it concerns for the torque issue.