10-04-2017, 08:19 PM
PRESENTED BY,
S.SONAI KARTHICK
T.SELVA KUMAR
[attachment=14597]
ABSTRACT
This concept is conceived from the fact that as you drive down your street and you put your hand out of the windows, you feel the enormous force of the wind, which in my view will do the world so much good especially in these troubling times of global warming.
In my minds eye, the vehicle will be such that there s an intake valve seated on the roof to amass all the wind needed to power the car. An alternator connects to the intake valve which converts the kinetic energy to electrical energy. This electrical energy is connected to a DC battery pack which is the source of power to a controller. This controller converts the DC voltage to AC three phase voltage with the help of power diodes.
The accelerator is connected to the controller with cable through a pair of potentiometers which act as variable resistors to regulate the speed of the vehicle. The vehicle is very efficient because it has relatively few revolving parts and thus making it very fast. When the accelerator is floored, the full voltage is given out by the controller and when the pressure on the accelerator is taken off no power(zero power) is given off by the controller.
This vehicle uses a direct motor to wheel configuration which increases power. Multiple motors are connected to the wheels to increase both propulsion and braking system.
It also has a single gear system which is identical to the automatic gear system. This system utilizes the torque of the motor being a function of the current to improve upon the overall efficiency of the car.
The brake system relies on vacuum braking system which derives its braking force from atmospheric pressure on the lower side of the piston of the vacuum brake cylinder while a vacuum is maintained.
The aircondition can also be maintained and operated with a motor as well.
The wind taken in by the intake of the car is enough to cool the motors and prevent them from overheating and thus increasing efficiency of the vehicle.
Wind power continually charges the battery bank which is the main feature of this vehicle and there is no stipulated time for charging because as you drive, your battery bank is continually charged. There is a volt meter that tracks the flow of current to and from the battery bank.
Wind-Powered Car Travels Downwind Faster Than the Wind
Rick Cavallaro and his friends have built a wind-powered vehicle that travels downwind faster than the wind, solving a riddle that can start fights.
The unusual wind-powered car hit a top speed 2.86 times faster than the wind during one recent run, a feat that depending upon your perspective is either the result of hard work or the same voodoo responsible for Ryan Seacrest s hair.
His explanation, then, sounds deceptively simple.
If you re on a bike and you re going downwind, you don t feel any wind anymore at all, he said. You lose the power of the wind when you reach the wind speed, because there is no relative wind at that point.
When he isn t obsessing over aerodynamics, Cavallaro works for Sportvision, the company that created the FoxTrax hockey puck aka the glowing puck and the yellow first-down line shown on telecasts of football games. Cavallaro s boss at Sportvision, world-class sailing navigator Stan Honey, turned him on to the DWFTTW question. Working with a hang-gliding buddy, Cavallaro did the math and built a model to prove DWFTTW is possible. Skeptics weren t convinced.
I thought people would say, That s cool, but they didn t. They said, Wow, you re an idiot. So we decided to build a full-size one. That s when we approached a couple of sponsors.
The basic concept.
Cavallaro lined up help from Google and Joby Energy and set to work with the San Jose State University aero department on an ultralight, four-wheeled vehicle with a 17-foot-tall propeller. The vehicle is made mostly of foam and mimics the aerodynamics of a Formula 1 race car. But it s the propeller that is key to how it is possible to travel downwind faster than the wind. It s also the source of the biggest misunderstandings about how the vehicle works.
Skeptics think that the wind is turning the prop, and the car is turning the wheels, and that s what makes the car go, Cavallaro said. That s not the case. The wheels are turning the prop. What happens is the prop thrust pushes the vehicle.
The wheels turn the prop, which turns the vehicle s wheels, which turn the prop, which turns the vehicle s wheels. Cavallaro knows what you re thinking.
It sounds like a perpetual motion machine but you ve got the wind as an external power source, he said.
Cavallaro said building a transmission capable of transferring power from the wheels to the prop was almost as hard as convincing skeptics that the vehicle would work. It took longer than a year and a lot of trial and error to make it work.
You ve got to come up with a transmission that can handle those loads, even though it s not at a high horsepower, he said. You break some things, and then you build bigger.
Cavallaro says the car achieved 2.86 times the speed of the wind (with a wind speed of 13.5 mph) during a test run at New Jerusalem Airport in Tracy, California, May 17. That was the best of the eight runs it made that day.
Next up is a run for a record certified by the North American Land Sailing Association. Cavallaro isn t too nervous about setting the record, because he s created the category.
As long as we actually achieve all the objectives of the category, then we re guaranteed to get a record because we re the first, he said.
Follow the team s progress at its blog, Ride Like the Wind (Only Faster). And if you ve got questions, post em in the comments. Cavallaro has been answering them. (electricity) and this would probably occur at a fairly
S.SONAI KARTHICK
T.SELVA KUMAR
[attachment=14597]
ABSTRACT
This concept is conceived from the fact that as you drive down your street and you put your hand out of the windows, you feel the enormous force of the wind, which in my view will do the world so much good especially in these troubling times of global warming.
In my minds eye, the vehicle will be such that there s an intake valve seated on the roof to amass all the wind needed to power the car. An alternator connects to the intake valve which converts the kinetic energy to electrical energy. This electrical energy is connected to a DC battery pack which is the source of power to a controller. This controller converts the DC voltage to AC three phase voltage with the help of power diodes.
The accelerator is connected to the controller with cable through a pair of potentiometers which act as variable resistors to regulate the speed of the vehicle. The vehicle is very efficient because it has relatively few revolving parts and thus making it very fast. When the accelerator is floored, the full voltage is given out by the controller and when the pressure on the accelerator is taken off no power(zero power) is given off by the controller.
This vehicle uses a direct motor to wheel configuration which increases power. Multiple motors are connected to the wheels to increase both propulsion and braking system.
It also has a single gear system which is identical to the automatic gear system. This system utilizes the torque of the motor being a function of the current to improve upon the overall efficiency of the car.
The brake system relies on vacuum braking system which derives its braking force from atmospheric pressure on the lower side of the piston of the vacuum brake cylinder while a vacuum is maintained.
The aircondition can also be maintained and operated with a motor as well.
The wind taken in by the intake of the car is enough to cool the motors and prevent them from overheating and thus increasing efficiency of the vehicle.
Wind power continually charges the battery bank which is the main feature of this vehicle and there is no stipulated time for charging because as you drive, your battery bank is continually charged. There is a volt meter that tracks the flow of current to and from the battery bank.
Wind-Powered Car Travels Downwind Faster Than the Wind
Rick Cavallaro and his friends have built a wind-powered vehicle that travels downwind faster than the wind, solving a riddle that can start fights.
The unusual wind-powered car hit a top speed 2.86 times faster than the wind during one recent run, a feat that depending upon your perspective is either the result of hard work or the same voodoo responsible for Ryan Seacrest s hair.
His explanation, then, sounds deceptively simple.
If you re on a bike and you re going downwind, you don t feel any wind anymore at all, he said. You lose the power of the wind when you reach the wind speed, because there is no relative wind at that point.
When he isn t obsessing over aerodynamics, Cavallaro works for Sportvision, the company that created the FoxTrax hockey puck aka the glowing puck and the yellow first-down line shown on telecasts of football games. Cavallaro s boss at Sportvision, world-class sailing navigator Stan Honey, turned him on to the DWFTTW question. Working with a hang-gliding buddy, Cavallaro did the math and built a model to prove DWFTTW is possible. Skeptics weren t convinced.
I thought people would say, That s cool, but they didn t. They said, Wow, you re an idiot. So we decided to build a full-size one. That s when we approached a couple of sponsors.
The basic concept.
Cavallaro lined up help from Google and Joby Energy and set to work with the San Jose State University aero department on an ultralight, four-wheeled vehicle with a 17-foot-tall propeller. The vehicle is made mostly of foam and mimics the aerodynamics of a Formula 1 race car. But it s the propeller that is key to how it is possible to travel downwind faster than the wind. It s also the source of the biggest misunderstandings about how the vehicle works.
Skeptics think that the wind is turning the prop, and the car is turning the wheels, and that s what makes the car go, Cavallaro said. That s not the case. The wheels are turning the prop. What happens is the prop thrust pushes the vehicle.
The wheels turn the prop, which turns the vehicle s wheels, which turn the prop, which turns the vehicle s wheels. Cavallaro knows what you re thinking.
It sounds like a perpetual motion machine but you ve got the wind as an external power source, he said.
Cavallaro said building a transmission capable of transferring power from the wheels to the prop was almost as hard as convincing skeptics that the vehicle would work. It took longer than a year and a lot of trial and error to make it work.
You ve got to come up with a transmission that can handle those loads, even though it s not at a high horsepower, he said. You break some things, and then you build bigger.
Cavallaro says the car achieved 2.86 times the speed of the wind (with a wind speed of 13.5 mph) during a test run at New Jerusalem Airport in Tracy, California, May 17. That was the best of the eight runs it made that day.
Next up is a run for a record certified by the North American Land Sailing Association. Cavallaro isn t too nervous about setting the record, because he s created the category.
As long as we actually achieve all the objectives of the category, then we re guaranteed to get a record because we re the first, he said.
Follow the team s progress at its blog, Ride Like the Wind (Only Faster). And if you ve got questions, post em in the comments. Cavallaro has been answering them. (electricity) and this would probably occur at a fairly