Come on Polaris give us a little something!
- Thread starter KingCon
- Start date
When we have the fuel-cell technology... that will be the reality...and will perform better all around.
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Someday that will be a reality, but at this point in time the battery and electric motor technology is still too heavy. Even if every effort was used to save / shave weight it would still be heavier than the Yamaha RX Ton and have a very short run time.
When it does come though; I'd like to see the drivers integrated into the motor case and the shaft stationary in the chassis. Backwards from the commonly known / used motors but they are out there. It would sure simplify the drive train portion. To make it AS reactive to the torque demands, AS a properly tuned CVT, will be the challenge. Think lots of sensors and software with ultra fast reaction times. It would need to take the sensors values millions of times a second and calculate what changes are needed and implement them equally as fast. Some of the sensors that would be needed I don't think are even available yet.
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Have you seen the alta mx bikes? Just need to get a battery that will last all day
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Interesting, thanks!
Anyone put a snow bike kit on one, yet? Interesting for sure. Lots of promising tech. out there, that will play out eventually and trickle down to other pursuits. Thanks for the heads up.
I dare say while their battery is state of the art, it is still a far cry from what you'd want to trust leaving your back yard or track with.
Anyone put a snow bike kit on one, yet? Interesting for sure. Lots of promising tech. out there, that will play out eventually and trickle down to other pursuits. Thanks for the heads up.
I dare say while their battery is state of the art, it is still a far cry from what you'd want to trust leaving your back yard or track with.
I don't have a lot of experience to see how things would fit, so this may be hot air all around, but a purpose designed 2 cyl boxer engine would be a neat possibility especially with the conventional tunnel being quite bare behind the swingarm. Being so narrow a CVT could probably be tucked in there fairly nicely.
J
Jaynelson
Well-known member
I'm not smart enough to think through the bits and pieces of this.....but.....
What about using a gas engine strictly as a generator to power an electric motor that would supply the drive? If the electric motor could supply the drive directly to the track....you could eliminate all clutches AND chaincase/belt drive. I have no idea what the physical size such a motor would need to be to do that job....but the theory sounds decent?
I work in the technology world and batteries are the limitations to just about anything right now. As soon as batteries become smaller, more powerful and affordable, then technology advances. The affordable part is huge for consumers. Just look how far smart phones and tablet devices have come. Still a far cry for powering motors.
We are starting to see batteries in motorcycles and other "people movers". But I'm really curious how this will play out in the snow where it is very wet and very cold at times. We get more temp and humidity fluctuation than another motor sport I know of.
We are starting to see batteries in motorcycles and other "people movers". But I'm really curious how this will play out in the snow where it is very wet and very cold at times. We get more temp and humidity fluctuation than another motor sport I know of.
J
Jaynelson
Well-known member
Correct, but for the sled application just skip the battery storage component altogether...or on a huge scale, it's basically how a locomotive drive system works.
Reality Check?
In a Locomotive the weight of the engine / generator / electric motors ARE an advantage for traction reasons.
Even the high end suitcase generators are nearly the weight of our two stoke engines. And they barely run small power tools if you are actually WORKING them.
As most currently designed generators and electric motors are typically using large quantities of Copper and Steel which are both heavier than Aluminum (the clutches). I don't see a viable gain. To equal the current power output of the current sleds / bikes, to electrify them comes with a weight penalty regardless of using a battery or generator. Using the "Best Available Technology" my best guess is at least one third to one half again the current weight. Its just not viable yet for a mountain machine. For a trail banger it probably is doable now for a select share of the market.
In a Locomotive the weight of the engine / generator / electric motors ARE an advantage for traction reasons.
Even the high end suitcase generators are nearly the weight of our two stoke engines. And they barely run small power tools if you are actually WORKING them.
As most currently designed generators and electric motors are typically using large quantities of Copper and Steel which are both heavier than Aluminum (the clutches). I don't see a viable gain. To equal the current power output of the current sleds / bikes, to electrify them comes with a weight penalty regardless of using a battery or generator. Using the "Best Available Technology" my best guess is at least one third to one half again the current weight. Its just not viable yet for a mountain machine. For a trail banger it probably is doable now for a select share of the market.
F
frog
Well-known member
Mt 15' is too. Have to open the throttle a bit and it pops right off and I have had the fuel pressure regulator update done. If I don't open the throttle it doesn't start very well warm.
Hurry up and design an AC battery and all the problems will be solved
I own a fully electric KTM Freeride E, and the response is instant, batterypack weighs 28kg and the engine produces a peak power of 22hp and 42nm. Batterytime pinned is about 30min, in ecomode it is as much as 1.5hrs.
Fun little thing to run around the yard, but batteries sure need to get better to see them in sleds, although I am excited to see whqt the future brings.
Fun little thing to run around the yard, but batteries sure need to get better to see them in sleds, although I am excited to see whqt the future brings.
We have a Nissan Leak all electric car. The range in perfect conditions is 85 miles. My buddy and I were joking one day about throwing a generator on a roof rack and extending the range. We calc'd out it would something around 50-60mpg equivalent. And you'd look like the Klampits while doing it with a generator on top of your car haha
In order to accomplish the direct drive you would need a variable frequency drive to accommodate speed changes since electric motors on their own are simply on or off
Anyone know roughly what the rpm of the track drivers is? You could kind of figure what range of motor you'd need from there. I don't see it needing a high hp motor. But food for thought on the weight. In industry the rule of thumb is one pound of copper winding per horse power. Plus your casings and bearings
Ie; 25hp motor approx 25 pounds of copper plus your other goodies
So maybe 50-60 pounds for that motor in an industrial design
You could likely save some casing weight by going to something more exotic than cast iron. Also likely lighter bearings anything I'm used to seeing is designed for continuous 24/7 duty
Anyone know roughly what the rpm of the track drivers is? You could kind of figure what range of motor you'd need from there. I don't see it needing a high hp motor. But food for thought on the weight. In industry the rule of thumb is one pound of copper winding per horse power. Plus your casings and bearings
Ie; 25hp motor approx 25 pounds of copper plus your other goodies
So maybe 50-60 pounds for that motor in an industrial design
You could likely save some casing weight by going to something more exotic than cast iron. Also likely lighter bearings anything I'm used to seeing is designed for continuous 24/7 duty
