Some of the coolest apps/jobs are in the gaps between fields. Think aerospace, robotics, advanced sensors, etc. If physics or engineering interest you get comfortable with calculus in at least 4 dimensions, upside down and under stress.
Companies can already buy-in to get time, space, words or street creed in every media format. How is this different than Mittten's coughing up an ad during your favorite futurama episode?
As an engineer and tinkerer I have to throwin a plug for increasing his capabilities. If he has a multimeter, get him a scope. If he has a dremel tool, get him a mini mill (shapeoko), etc.
Who you calling dude goat fucker?, perhaps you should take your own advise.
Well, perhaps if you want to make a point, use the proper wording?
Or maybe I'm just "dump", and "behaving retard". Read a fucking book and don't breed.
Feel free to dazzle me with your physic knowledge, but from what I've seen you don't even understand how an electric motor works, let alone basic energy transmission and efficiency
.
Electric engines, especially as it does not need a drive shaft, as it is not one single engine but four directly connected ones, let you drive 7 times farer for the same amount of energy..
You sir are either trolling, or just went full retard.
Well that's confusing. Legal unless it's identical to a commercially available firearm, or it's a 'machinegun', or made from more than 10 parts... wtf?
Exactly, fab'ing a lower won't get you in trouble, you could just be making a paint ball gun or whatever. But however fab'ing a lower and owning a upper without a FFL would get you a free ride in a crown vic.
That's just an illegal custom firearm. The AR-15 has a split receiver design and the lower is serialized and constitutes the firearm. By fabricating the lower receiver this gunsmith just made a new custom firearm (legal), but did not serialize it (illegal). Also a crappy plastic gun.
FYI: electric engines usually use no gear. Especially if connected directly to thr wheel...
I think you mean 'if and only if', not 'especially'. In high torque electric systems direct drive is a rarity. Even then, in most cases, it exists primarily for the control benefits not efficiency.
I'm saddened that you've managed to miss the point. I would love for you to investigate the details above, at least you would learn something Feel free to carry your line of thought to the next step and compare the energy density of an ICE to that of an electric system. Then multiple that by the estimated efficiency, you'll then see why ICE's can 'afford' to be so inefficient.
You're on the right track but you're looking at it too simply. A Hub motor is basically as you say, a motor directly attached to a wheel, to the point where it becomes the wheel. The stator of the motor becomes the axle of the wheel and the rotor becomes the wheel.
The efficiency of a motor is a measure of how well it converts electrical energy into useful work. (Most) Energy is lost in the form of heat. Typical real world electric motor efficiency under load is about 80%. In your case you would see much worse.
In your case you have no transmission (1:1 gear ratio), which yes gives you zero transmission loss, but you also do not have a gear ratio. With no gear ratio your motors need to be able to supply enough torque to get your vehicle moving. In the electric motor world, more torque takes more current, unfortunately this means more heat and more energy loss (I^2 R)
Hopefully that starts to clear things up. In practice weight is another large deterrent of hub motors. As an exercise you might want to look for a motor that can match the torque output of a car and find out how much it weights.
Slashdot Mirror
This just in, the X-51 closed today down 3,790, metres...
Boeing's stock will plummet faster than a X-51 WaveRider aircraft with a faulty control fin.
I'm sure they didn't have a problem with .jihad, .arrangedmarriage13yrolds or .womenshouldnotdrive.
Some of the coolest apps/jobs are in the gaps between fields. Think aerospace, robotics, advanced sensors, etc. If physics or engineering interest you get comfortable with calculus in at least 4 dimensions, upside down and under stress.
Queue the "OMG the default choice is NOW my favorite choice" comments.
Seriously anyone installing Debian straight no mixer does not care what DE is on the cd.
Exactly. Is it impressive? Yes.
Is it an effective metric to rank skill? no not really.
Finger prints and a pin should be enough to locate your account number. Not having a card to lose wold be an awesome side effect.
Companies can already buy-in to get time, space, words or street creed in every media format. How is this different than Mittten's coughing up an ad during your favorite futurama episode?
Which gravitational law are you talking about? Quantum gravity or General relativity
Sorry, there's another production run coming...soon...
But I'm sure you can find something else to complain about though.
Have fun in your 99% efficient world. Just leave the rest of us in the real world alone, thanks!
Arduino for sure... or Netduino if he swings that way.
He recently used teensy and arduino boards and an accelerometer to add some bells and whistles to a toy car he made.
RTFQ
As an engineer and tinkerer I have to throwin a plug for increasing his capabilities. If he has a multimeter, get him a scope. If he has a dremel tool, get him a mini mill (shapeoko), etc.
Definitely photoshopped.
Well, perhaps if you want to make a point, use the proper wording?
Or maybe I'm just "dump", and "behaving retard". Read a fucking book and don't breed.
Feel free to dazzle me with your physic knowledge, but from what I've seen you don't even understand how an electric motor works, let alone basic energy transmission and efficiency
. Electric engines, especially as it does not need a drive shaft, as it is not one single engine but four directly connected ones, let you drive 7 times farer for the same amount of energy..
You sir are either trolling, or just went full retard.
Well that's confusing. Legal unless it's identical to a commercially available firearm, or it's a 'machinegun', or made from more than 10 parts... wtf?
Exactly, fab'ing a lower won't get you in trouble, you could just be making a paint ball gun or whatever. But however fab'ing a lower and owning a upper without a FFL would get you a free ride in a crown vic.
So our market share is shrinking after the launch of the Windows Phone... Quick, stop doing everything else, that will fix it!
I'm beginning to think M$ management culture is infectious
That's just an illegal custom firearm. The AR-15 has a split receiver design and the lower is serialized and constitutes the firearm. By fabricating the lower receiver this gunsmith just made a new custom firearm (legal), but did not serialize it (illegal). Also a crappy plastic gun.
FYI: electric engines usually use no gear. Especially if connected directly to thr wheel ...
I think you mean 'if and only if', not 'especially'. In high torque electric systems direct drive is a rarity. Even then, in most cases, it exists primarily for the control benefits not efficiency.
I'm saddened that you've managed to miss the point. I would love for you to investigate the details above, at least you would learn something Feel free to carry your line of thought to the next step and compare the energy density of an ICE to that of an electric system. Then multiple that by the estimated efficiency, you'll then see why ICE's can 'afford' to be so inefficient.
"they" are telling us not to look at the weather ("boy it's 'whatever' today"), and to look at the climate data ("ooh look at that trend line" )
If you think "they" are saying anything else you are listening to the wrong "they".
You're on the right track but you're looking at it too simply. A Hub motor is basically as you say, a motor directly attached to a wheel, to the point where it becomes the wheel. The stator of the motor becomes the axle of the wheel and the rotor becomes the wheel.
The efficiency of a motor is a measure of how well it converts electrical energy into useful work. (Most) Energy is lost in the form of heat. Typical real world electric motor efficiency under load is about 80%. In your case you would see much worse.
In your case you have no transmission (1:1 gear ratio), which yes gives you zero transmission loss, but you also do not have a gear ratio. With no gear ratio your motors need to be able to supply enough torque to get your vehicle moving. In the electric motor world, more torque takes more current, unfortunately this means more heat and more energy loss (I^2 R)
Hopefully that starts to clear things up. In practice weight is another large deterrent of hub motors. As an exercise you might want to look for a motor that can match the torque output of a car and find out how much it weights.
For the good of the herd, we must not change settings
Oh Noes, we has leak
Now people will tell us how this won't work