Advantages and Disadvantages Of Solar Cars

Cars powered by solar/sun energy are called solar powered cars. Solar cars have many similarities to the regular car. They have a motor, steering wheel, seats, brakes and more.

Solar powered cars use solar panels to obtain energy from the sun, which is then converted into electric energy for the running of the car. If there is no sun or very little sun light, the car photovoltaic cells on the solar panel will not get energy and so the car will only operate for limited distances.

These cars were first built by some universities then its research and development continued from there. The research on solar powered cars was focused on solar cell design, car power requirement, air-conditioning and heating.

The solar panel on a solar powered car contains hundreds of photovoltaic cells. They convert sunlight into electricity. Unlike objects that also use solar energy, solar cars can use different solar cell technologies that often involve monocrystalline silicon, polycrystalline silicon and gallium arsenide.

Solar powered cars usually are designed with distinctive shapes because designers' objective is to minimize drag and car weight and maximize the exposure to sun light. The design considerations also involve the safety of the car.

Advantages Of Solar Cars

  • Unlike regular cars, solar energy powered cars are able to utilize their full power at any speed.
  • Solar powered cars do not require any expense for running.
  • Solar cars are quite.
  • Solar cars require very low maintenance.
  • Solar cars produces no harmful emissions.
These were advantages of solar powered cars.

Disadvantages Of Solar Cars

  • Solar cars don't have speed or power that regular cars have.
  • Solar powered cars can operate only for limited distances is there is no sun.
  • If it is dark out for many days, the car battery will not charge and you this can seem as a  problem to many problem. This is the main reason why people don't rely on solar cars.
  • A good solar powered car is expensive. It will cost $200,000 or more.
  • Parts used in solar cars are not produced in large quantity so they are expensive.

These were the disadvantages of solar powered cars. Also read: Components of a Solar Car

Early and Late Dates in Project Management

You have heard of early and late dates when studying project management, project scheduling or in project management software like Primavera. Below, I will describe early and late dates in easy words.

Early Dates

Early Start:

The earliest possible date the remaining work for the activity can begin. This date is calculated by the project scheduler based on activity relationships, schedule constraints, and resource availability. The Early Start equals the Remaining Start unless you preserve the scheduled early dates during leveling.

Early Finish:

The earliest possible date the activity can finish. This date is calculated by the project scheduler based on activity relationships, schedule constraints, and resource availability. The Early Finish equals the Remaining Finish unless you preserve the scheduled early dates during leveling

Late Dates

Late Start:

The latest possible date the remaining work for the activity must begin without delaying the project finish date. This date is calculated by the project scheduler based on activity relationships, schedule constraints, and resource availability. The Late Start equals the Remaining Late Start unless you preserve the scheduled late dates during leveling.

Late Finish:

The latest possible date the activity must finish without delaying the project finish date. This date is calculated by the project scheduler based on activity relationships, schedule constraints, and resource availability. The Late Finish equals the Remaining Late Finish unless you preserve the scheduled late dates during leveling.

Reasons Why Concorde Stopped Flying | Problems With Concorde

There were many reasons why Concorde stopped flying, these are mentioned below.

Noise Factor

There were many complaints from public about the noise Concorde made. The noise was not much from the plane but by the supersonic speed, which produced sound like a thunder or a bang.

Cost Factor

The Oil crisis that started in 1970s made it very expensive to operate Concorde, and influenced many to-be operators to reconsider their options.

Technological Constraints

Unlike many other airlines, Concorde still used many analog instrument. And this was one of the reasons Concorde always flew with a flight engineer in every flight.

The 2000 Crash

The crash of Concorde flight diminished the ambition of its operators.

Costly for Passengers

One Concorde ticket costed around one thousand UK pounds, and nearly double for a First class seat, in 1980s. There were not as many customers as were expected to be received.

Non Eco Friendly

A 100-seater Concorde plane burnt 89,000 liters of fuel in a flight, where as other planes carrying about 400 passengers burnt only 59000 liters of fuel, in the same length flight.

These were the reasons why Concorde was retired. But now, it's in the news that a renewed Concorde will be in the air again in 2019. That's a great news!
Also read:

Technical Specifications of Concorde

Find here technical specification of Concorde:

  • Length 203 feet
  • Height: 11.4 meters
  • Wingspan: 8 25.5 meters
  • Empty weight: 173,500 pounds  (78690 kgs)
  • Max. take-off weight: 408,000 pounds (185,066 kgs)
  • Passenger capacity: 100
  • Max speed: 1448 mph (2330 kph)
  • Range:  4505 miles (7250 kms)
  • Max elevation: 60,000 feet
  • Rate of climb:  1524 miles/min (2452 kms/min)

Also read:

8 Interesting Facts About Tupolev Tu-144

Tupolev Tu-144 was world's first supersonic airplane, which took off first in 1996, even before Concorde.  Find here interesting facts about Tupolev Tu-144 that you would have never heard before

1. Tupolev Tu-144 could fly with maximum speed of 1510 mph (2430 kmh). This is slightly more speed than Concorde.

2. Like Concorde, the Tupolev Tu-144 was also prohibited from flying over certain areas, due to the noise it created.

3. Due to political and economic crisis that were developed in USSR in 1980's the government started saving money and the program to create further Tupolev Tu-144 was also effected.

4. After flying 55 times, in 9 years, the plane got retired from the service.

5. It doesn’t have air-brakes and reverse thruster and relies only on wheels to stop.

6. The plane flew at 52,000 feet, 8000 less than where Concorde flew.

7. Tupolev Tu-144 could carry 58 passengers only per flight, 42 less passengers than Concorde did.

8. There was a lot of cabin noise coming from engines and air conditioners. Passengers could talk to each other with difficulty. Furthermore, noise at back of the plane was unbearable.

These were 8 interesting Tupolev Tu-144 facts. Hope you liked them.

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