Wednesday, July 15, 2015

WANTED: Visionary People to Build Smal Pedal-Electric Vehicles




It never ceases to amaze me how design students know nothing about mechanical design! They design vehicles that use antiquated steering technology. And when I try to tell them about 'zero trail technology' they still refuse to believe it! This student put more technology into the seat than anything else!


Note the steering angle, there can be a steering wheel just above the peddler’s knees. And there will be ZERO swing, like it is in the green trike below.

With the addition of leaning trike technology on the rear. And understanding what gears do and how to apply them would be very important. I would mount the motor under the seat and run a drive belt to a large pulley on the Nuvinci N171 input side, for a tadpole trike. Giving the motor access to more gear ratios. Then I would use a variable speed crank-set so the driver could match their pedaling cadence to what the motor is doing.

This could be built easily enough






This one needs a larger front wheel and small rear wheels

This one could have a single front wheel
If you use more than three wheels it has to be registered as a car.

 this design could have only one wheel in the rear
if the cab was in the middle


https://www.pinterest.com/pin/434386326528634539/




http://www.tuvie.com/futuristic-sleek-peugeot-shoo-car-concept-with-solar-panel-roof/


Monday, April 20, 2015

Velomobiles


http://bicycledesign.net/2015/02/a-collection-of-velomobile-links-part-1/




Power assisted Velomobiles will become a very popular for of transportation (when enough people wake up to the facts of global heating and environmental collapse).

Velomobiles have an efficiency of 40 miles to 85 miles per kilo-watt hour of electricity, depending on the weight, speed, gears used, and hills you climb. As opposed to 3.7 miles per kWh  for a full sized electric car. How can anyone not afford to own one of these minimalist vehicles?



Don't be discouraged by the pedaling, you don't need to pedal at all if you don't want the exercise. But it will give you better mileage. One man built a Velomobile that is charged by pedaling a generator rather than the drive wheel.
Contrary to popular belief, carbon fiber is not the strongest material for the body. The only thing that makes it strong at all is the epoxy. So you could use news paper for the sub-straight. But Kevlar cloth is the strongest material if stretched tight enough, but probably not the lightest weight. Some people use wooden door skins molded on the frame.

http://www.velomobiles.co.uk/category/velomobiles/other-sites/
You can buy a kit to build your own, or you can get a really nice Velomobile ready made. But you do need to consider the right power system for these vehicles. Steep hills can destroy an a inadequate drive system.
If you must use a hub motor, there are some (see link below) that are much stronger than Crystal Lite, formerly known as the strongest. While hub motors can produce a longer roving range on flat land, they have problems with road shock and rain. Some have a disclaimer that their hub motors can't expect to last more than 7 years. So I would use a 1.6 hp Mars 909 motor and a large rim pulley, just to climb our steep hills with two adults and/or cargo up to 600lbs total combined weight.




Thursday, April 16, 2015

Vacuum tube trains?





Vacuum tube trains could be in the future of America. This is an old concept, with new technology; A near vacuum tube with magnetic levitation tracks.

Several organizations are trying to build prototypes that will show that it can be done. But the autocracy will try to stop it. They have so much to loose by people not using gasoline cars.


The mega corporations are the only ones with enough money to build these multi-trillion dollar fantasy transportation systems. They sound like another futuristic promise to keep the worker drones pacified. So forget them and start building something for local transportation, ie: motorized cargo cycle trucks, or even a sexy electric micro car with pedals. Traveling to a distant cities will be a thing of the past soon, unless your rich. 




Monday, April 13, 2015

Battery Technology






Battery technology is another example of how the forces of imperialism are keeping us from having cheap fuels.

Metal-sodium cells like the aluminum-air batteries that Nicola Tesla first suggested more than a hundred years ago, will have over three times the capacity of lithium-ion, and some will be up to 75 times more energy dense than lithium-ion fuel cells.

The only reason we don't have them now is simple economics. The power companies buy up the patents to hold the technology until gasoline and coal are no longer available.

The American military is the largest developer of new power technologies. They are developing “metal-sodium-air” power stations for field use.

Forget the hydrogen fuel cells, that was a scam developed by the energy industry to help repress California's zero emission laws of the 1990's!

Electric cars could travel 13 times farther per charge with these “future” technologies.

If you rally want to encourage battery technology development, kill your GD petroleum powered car and buy into electric technology now!


http://www.alke.com/electric-truck





Thursday, March 26, 2015

Delay is the worst kind of denial!

















The car industry has been promising such an array of fabulous cars “in the future” ever since they started making cars. Just look at the bull shit from the early 50s and 60s.

And they are still doing it! In the future we will have exotic electric cars with amazing military style electronics, that lean into the turns. And you won't have to steer it your self. And they will be able to drive bumper to bumper on the free way with no danger at all! And they will use nuclear fuel and hydrogen fuel cells. And you will love them even more than your child!

All you need to do, is be happy that you are a wage slave, and keep driving your gas gulping smog spewing car, until the future finally comes along! What amazing bull shit! If you believe any of those lies, you would love the treasonous lies on FOX news!








Saturday, March 21, 2015

Who killed the electric car?





In 1990 California past a law that cars had to have zero emissions because smog was killing too many people and it was just costing too much money! So the industry fought it tooth and nail. Yet at the same time they produced some really excellent electric cars. But they only leased these cars to a few thousand people, there was a long waiting list (people really wanted them badly!)

Then the politicians were paid to help fight the project, even emperor Bush got in the fight. The corporate maggots claimed that there was not enough people wanting them and that they cost too much to make (total bullshit from hell).

Lead acid batteries gave only a 60mile range. That's when Nickel metal Hydride battery technology was bought by Texaco and suppressed. Even to this day you can get only small NiMH cells.

Then they pulled a 'bait and switch' by claiming they could make a hydrogen fuel-cell car that would be so much better. Unfortunately they was only a concept car that would take eons to develop into a realistic machine. Hydrogen takes 3 to 4 times as much energy as a battery powered car.

And to top it off they developed the Hummer tank truck. Any one that drives that kind of monster-car is way too rich and should be eaten by mad dogs!


So now days if you want an electric car, you have to build your own! 

who killed the electric car? you have to pay to watch that movie. but this one will give you a taste.  https://www.youtube.com/watch?v=_AU3_2IT8k8



delay is the worst kind of  denial!

Friday, February 6, 2015

GEARED MID-DRIVES

Sellers of e-bikes, law makers and users should understand this,
(even if just to explain to the police).


The power on label is not what you get at the ground. The motor its self looses energy before the first stage reduction then each set of gears looses some. A 2800 watt motor will give you less power with a geared mid drive than with a direct drive, but not much. Power assisted bicycles should be regulated like mopeds; the power at the rear axle for a moped in Washington is limited to “2 brake horse power”. A bicycle maybe 1.5 brake hp , not that any one could tell by looking at it. So in Washington state they let us have 1kw (input) motor, Mopeds are regulated at the factory level.


The law should be changed to read “limited to the speed of 20mph” only! Big heavy motors can produce much more power than is on the label. And because it takes a lot of power to climb hills with cargo, Speed and brakes should be the only consideration.

If your vehicle is geared correctly to climb your worst hill, your equipment will last a lot longer. And you can use the controller to limit the amount of power output to keep the speed down to the legal limit.
Unfortunately calculating the gears for a particular motor is very difficult. For instance, a brushless motor would have its peak power at half of it's unloaded rpm, if there was no current limit set in the controller. The point where it can possibly reach its most power is between 50% and 90% of its no load rpm, depending on the controllers battery current limit. This point can be calculated, but it's not easy. There is a lot of motor data out there. You can calculate it using Peak Efficiency rpm, for example, or find it at ebikes.ca for hub-motors. Much easier to buy a kit, but be aware of how much power you need.

With only 250 watts in Asia or Europe you pretty much need a transmission to have a decent all around vehicle. 


Gearing a motor to human speed

Beginners info
https://www.electricbike.com/lightning-rods-big-block/
https://www.electricbike.com/lightning-rods-mid-drive-kit/

Mid-drives can be done in several different ways.
The most torque is obtained from a two stage gear reduction before the crank-set, making it into a three stage reduction by the time the energy gets to the wheel. Loosing too much energy.

Or you can get better efficiency if you bypass the cranks, but that makes it impossible to climb hills without motor support. Even if there is increased efficiency and less wear.

If you want to drive the rear wheel directly, you may need a motor with more copper just to deal with the heat produced by slow speed high torque hill climbing.

The reason to use the bikes gears is the motor can stay up in the higher RPMs (allowing for a faster smaller motor). This prevents the motor from producing waste-heat in the first place, due to bogging down and running at low RPMs, like a hub motor might do (a direct-drive hub spins at the RPMs of the wheel, and geared hub motors have a poor heat-shedding path). Also motors with low pole-count allows can run at high RPMs without experiencing the waste-heat that is usually produced by eddy-currents.

https://www.electricbike.com/bafang-bbso2-750w-mid-drive/
Mid-drives are usually limited to about 1000-1200 Watts of power, since the derailleur gears can not last more power reliably. Mid-drive chains wear out quickly.

I like the idea of powering the rear wheel directly through a Nuvinci infinite hub gear. Or drive the wheel directly with one gear reduction and the pedaled chain drives the hub gear, like the Elf car does. Even if you should use a larger motor, with ability to run more amps at a slower rpm. You may need a larger bike for this extra weight, like a large cargo bike.


I think using a 5 or 6 speed cassette with the cogs spaced a wee bit further apart you could use the heavier power chain. But you may need to use an internal gear hub, because heavier duty chains are not going to shift with a derailleur.




The picture is of a Metropolis two speed internal geared crank set, that sends only a small part of the torque through the pedaled crank at 60 rpm. Most of the torque is sent to the rear wheel by a Gates belt. Bicycle drive trains cannot take the full torque that a large motor will produce. Hard starts on a cargo bike is a very bad idea.

To drive the left side crank with a three speed Sturmy-

Archer gear hub (as a geared mid-drive). Use a chain from 

motor to hub sprocket, and a chain or belt from a pulley 

mounted on the flange of the hub.

e-bike motors:

converting a hub motor to mid drive motor:



This is a geared hub motor converted to a mid-drive.


Two stage reduction before the crank-set.









This motor drives the crank from the left side
 and the rear sprockets from the right side

old tech gearless hub motor 


When driving the cranks, so that they move at human speed with a 'gear-less' hub motor, it is less effecient than what you would get when using a fast motor with a two stage reduction, like a 'geared' hub motor, because motors were made to move fast, faster and even faster (depending on the voltage and the way they were made).

Think about how gears turn kinetic energy into torque. “But there is so much magnetic mass that it makes up for the lack of speed,” you may argue. So it would have a larger weight to efficiency ratio; the newer mid-drives have smaller lighter faster, more efficient motors. 


The one thing I don't like about mid-drives is that they use up your drive chain faster than human power alone (100-150watts). That is one reason I would drive the wheel directly with a belt.



I like the idea of powering the rear wheel directly through a two gear hub. Even if you should use a larger motor, with ability to run more amps at a slower rpm. 

Driving the rear wheel through a two or three speed hub 
would be a good way to have enough gears with out driving 
your sprocket driven chain. There by saving a lot of 
maintenance money.





A Nuvinci N171 is possibly the only hub gear that could handle the torque form a 2800 watt motor, when climbing an 8% grade with 350 to 400lbs.

Nuvinci hub gear with power input
Direct to wheel through a gear hub 
-SRAM Dual Drive, 3-speed Internally-Geared-Hub
 (with 4 derailleur sprockets retained).

https://www.electricbike.com/miles-emoulton/


Sturmey-Archer

these are not strong enough for more than 300 watts

Hot rod or hill climber?

I have finally decided the best way to motorize a light weight vehicle is to mount a motor behind the seat tube and run the power to the drive wheel directly (unless you can find a variable speed gear box that does not use friction to shift the gears). However this is best done on a long-tail cargo bike or recumbent trike.

Mid-drives make it difficult to shift gears. And most will turn your bike into an illegal motor cycle (unless the controller has a speed sensor). They can drive your bicycle faster than 20mph even if you keep your feet on the pedals.

Using a high speed, high voltage motor, with enough gear reduction to turn the kinetic energy into enough torque thrust for your worst hill. It could make it possible to drive more weight up steeper hills than using a large heavy motor that is not geared. Also you can use a larger heavier duty drive chain, or Gates belt to the drive wheel, than mid-drives. Belts are quieter and last longer than chains.

And if your gear is set to the speed your motor can handle on your steepest hill, you will always be in the right gear to cross an intersection and climb a hill. But you may want to adjust your pedaling gears to take over from the motor as soon as your moving fast enough.