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EUC with longest range under 10kg


Flows

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Hi Folks, I have been looking at EUC and off-road electric skateboards for portable transport that we can carry to destinations in light aircraft. 

Weight and space is important in general aviation aircraft so looking for something under 10kg that will handle rough surfaces with really good range. Any off the shelf or off the shelf with battery mod options recommended? Reliability in wet conditions would also be a bonus.

Many thanks in advance!

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1 hour ago, Flows said:

Hi Folks, I have been looking at EUC and off-road electric skateboards for portable transport that we can carry to destinations in light aircraft. 

Weight and space is important in general aviation aircraft so looking for something under 10kg that will handle rough surfaces with really good range. Any off the shelf or off the shelf with battery mod options recommended? Reliability in wet conditions would also be a bonus.

Many thanks in advance!

You've just asked for the impossible wheel. I don't even know if a 10kg wheel exists (maybe the i5?), but it certainly can't handle rough surfaces and have a long range if such a wheel exists.

What do you consider a good range?

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Only wheel I know under 10kg is the IPS i5 (~7.8kg). 12 km/8 miles or so range, but not too waterproof.

The Inmotion V5F is probably the best compromise between being weatherproof, speed, battery size and weight (at 12 kg). Range about 16-17 km/10 miles.

The Gotway mten3 is also around 12kg and has the biggest range/biggest battery but a small tire (bad for uneven surfaces). 25-28 (really bumpy) km/15-17 miles.

Ranges are for a ~80kg rider.

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1 hour ago, Flows said:

Cheers all, guessing 10" is less bumpy than a electric skateboard. 

https://www.ewheels.com/electric-unicycle-ultimate_ewheel_comparison_ips_airwheel_ninebot_king_song_gotway/

This says the Mten is 20lbs 9kg. Not the case?

Correct. Not the case.

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There are two versions of the Glide 2. The Glide 2 Lite has a 160wh battery and weighs 10.5kg. If you can handle the extra 500 grams a 14" wheel should be able to handle pretty uneven terrain. The range is only ~8mi, though. Doubling the capacity and range brings the weight to 11.8kg, which is probably too far past the limit.

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The IPS i5 is a very slim 14" wheel, weighs <8kg and has a 245Wh battery. The main problem I know of is the unreliable support from IPS in case of a problem with the wheel. 14" will be much much better on rough surfaces than a skateboard. The thin tire probably underperforms on soft surfaces though.

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I know that weight is very important but there is a HUGE difference in capability between a 10 kg unit and 13.7 kg unit. I personally would lose 3.7 kg from my belly and get a better EUC.  :D

 

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OK to it looks like weight wise:

IPS i5 245Wh 16.5lbs 12M 14.2Mph 

IPS zero 340 340Wh 21lbs 25M 15.5Mph

Solowheel Glide 2 320Wh 26lbs 16M 15.5Mph

Gotway Mten v3 512Wh Advertised as 22lbs actually 27lbs 28M 22Mph

Something tells me the range figures quoted for the IPS wheels are aspirational. Anyone care to edit the above with real world numbers! ;)

Also what on earth is this?

36539963295_e05e752e73_b.jpg

 

 

 

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6 minutes ago, Flows said:

OK to it looks like weight wise:

IPS i5 245Wh 16.5lbs 12M 14.2Mph 

IPS zero 340 340Wh 21lbs 25M 15.5Mph

Solowheel Glide 2 320Wh 26lbs 16M 15.5Mph

Gotway Mten v3 512Wh Advertised as 22lbs actually 27lbs 28M 22Mph

Something tells me the range figures quoted for the IPS wheels are aspirational. Anyone care to edit the above with real world numbers! ;)

Also what on earth is this?

36539963295_e05e752e73_b.jpg

I believe that's the first generation of the Mten. But they also had made a 8-inch wheel.

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8 minutes ago, Flows said:

Something tells me the range figures quoted for the IPS wheels are aspirational. Anyone care to edit the above with real world numbers! ;)

About 12-18 Wh/km are reported here as realistic values - depending on weight, speed, incline,...

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11 minutes ago, Flows said:

Something tells me the range figures quoted for the IPS wheels are aspirational. Anyone care to edit the above with real world numbers!

Forget wheel specific range numbers, battery capacity is all you need to know.

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9 minutes ago, Mono said:

Forget wheel specific range numbers, battery capacity is all you need to know.

Very true. In the end, only the battery size counts.

Quick formula: battery in Wh *0.8/15 is the optimistic range (in km), battery*0.8/16 the pessimistic range (in km) for an 80kg rider. Divide by 1.61 for miles.

Also, speeds are top speeds. Do not expect to get close to them for more than bursts. Assume 80% of top speed is continuously attainable.

Have you looked at the Inmotion V8/Solowheel Glide 3 for a compromise between weight and your 20mile/20mph ideas in the other thread? (You'd have to go for a KS16S to realistically have that.)

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4 hours ago, Flows said:

Gotway Mten v3 512Wh Advertised as 22lbs actually 27lbs 28M 22Mph

I just weighed my MTen3, it's 24lbs and change. If your destination is urban riding, the MTen3 is an excellent choice. It's very comfortable going up to 15mph, it goes faster but it gets a little scary. But if you plan on going faster, you'll need safety gear, which you have to take the additional weight into account. 

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8 hours ago, Flows said:

Has anyone done a Li-po battery conversion with an EUC to try and save weight?

There have been mods - but only to put more batteries inside!

8 hours ago, Flows said:

Silly question?

Batteries provide safety.

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We may this this happen once batteries improve to the point where they are much smaller and lighter, giving a week battery life to our mobiles and 100 KM range with a 1 KG battery ;) 

So, if you don't mind waiting 2-5-10 years... :P 

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1 hour ago, Jean Dublin said:

We may this this happen once batteries improve to the point where they are much smaller and lighter, giving a week battery life to our mobiles and 100 KM range with a 1 KG battery

I didn't crunch the numbers right now, but this may well be beyond some strong physical limitations. I have heard there may not be much room for improvement over current technology anymore, because the electric energy needs to be somehow stored in the material. Unfortunately, I didn't check or can't remember out of my head the underlying limiting mechanism.

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1 hour ago, Mono said:

I didn't crunch the numbers right now, but this may well be beyond some strong physical limitations. I have heard there may not be much room for improvement over current technology anymore, because the electric energy needs to be somehow stored in the material. Unfortunately, I didn't check or can't remember out of my head the underlying limiting mechanism.

Yes, I agree. I'm thinking of a new technology that comes up, not sure if it will be graphene batteries or something else, but the current technology is quite old and hopefully something new will be discovered soon ;) 

Samsung just finished developing their graphene batteries, which charge 5 times faster and can store 45% more energy in the same size.
That is definitely a good step if it does work :) (the Gotway Monster 2400 WH would become a ~3500 WH :P , which would maybe charge in ~6h rather than ~20h which is about what it takes with the original charger)

 

 

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37 minutes ago, Jean Dublin said:

Yes, I agree. I'm thinking of a new technology that comes up, not sure if it will be graphene batteries or something else, but the current technology is quite old and hopefully something new will be discovered soon ;) 

I was talking about new technology. Every technology is limited by the physics, unless we haven't got the understanding of the physics right, which sometimes happens.

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