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Help me guys! I need to measure a motors lift weight(for a flying machine)! Answered

So, I'm making a hover bike. Yea, dont judge me. And i have to measure the motor(s) needed to lift my bike. I have measured that my bike will weight about 75kg with me without the motors. So i need motor that can lift 75kg+(motors weight) at a power consumption of (something). Help please? :D

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Toga_Dan (author)2016-10-11

Colin furze did somethin like this. Check youtube.

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user

I know. But he didn't use electric motors. He used gas motors.

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user

Ah. I'm not at all sure that electric will have the power to weight ratio you need.

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caitlinsdad (author)2016-10-11

You need to take into account other things when designing...forced duct air or propeller, how many, placement, prop or blade efficiency, electric or gas, gearing or drive transmission, added weight of batteries needed to power, there are youtube videos of others that have built a hoverbike, prototype at least, see what they use. Good luck.

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user

well, i have all of that data ready, 2 propellers, front and back, blades made of either metal/plastic/carbon fiber, electric, batteries weight of 5 kg, and i have seen videos.

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user

I would go for a 2 stroke motorbike engine.
You can get these mini bikes with 80 or even 125ccm engines often for under 100 bucks second hand.
Of course you need some sort of differential or 90° gear for props facing down as you need to keep the engine more or less upright.
Good thing about 2 stroke engines is that get high revs and respond well and fast to the throttle.
Downside is the noise and smoke/smell.
With a powerful engine you could also consider a single engine system where the props are driven by a variable differential, would save quite a few kg but requires good engeneering.

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user

Well, i have a problem. I dont know a f*** about gas engines.

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user

You are not trying to say you wanted to create a battery powered hoverbike???
If so forget it as your batteries will be too big to handle.
Petrol is the only way to go unless you want hover with an extension cord...

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user

Oh well. (I choose you petrol) I just found a 80cc bike engine conversion kit for $100 on alibaba.

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user

not that hard to make. just a little bit expensive

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user

You could browse through the online catalogs of industrial suppliers like grainger or mcmaster-carr or the big alibaba export sites to find something you can use. I don't think there is anything that powerful and compact enough to be salvaged from something at the junk yard. And it helps to be able to weld or have a machine shop available to make all the custom parts and fittings as you go along. Yes, it is an expensive hobby, one of the reasons why I do not have a mini-submarine at the dock...wait, I don't even have a boat...

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ТерентийМ (author)2016-10-11

And dont mind my name, I'm half russian.

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