Latest By
Category:
Armor
Artificial
Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual
Person
Warfare
Weapon
Work
"We [science fiction writers] always wanted to believe in "private sector" space -- hucksters make better characters than a government does."
- Larry Niven
 |
| Sunpower Screen | ||
| A solar cell array used to provide power for a vehicle. |
The Sunpower screen was the motive power for a special kind of explorational vehicle. Today, we would call this kind of "screen" a photovoltaic cell array, or solar panel. A variety of solar panels are available commercially.
| The vehicle he had chosen was not an unreasonable substitute for burros. It was extremely rugged, easy to operate, and almost foolproof. It drew its power from six square yards of sunpower screens on its low curved roof. These drove a constant- load motor, or, when halted, replenished the storage battery against cloudy weather, or night travel. The bearings were 'everlasting', and every moving part, other than the caterpillar treads and the controls, were sealed up, secure from inexpert tinkering. |
| From Coventry,
by Robert Heinlein. Published by Not Known in 1940 Additional resources -
|
At present-day rates of efficiency, six square yards of Amorphous silicon-based solar cells would produce about (100 milliwatts per square inch) x (6 x 36 x 36 square inches) = 780 watts of power.
For comparison, the Ford e-Ka uses a battery pack which consists of 180 individual cells, and is capable of storing 28 kilowatt hours (kW/h) of energy, and weighs a mere 280 kilograms. This vehicle goes zero to sixty in about 12 seconds and is capable of eighty miles an hour. If you are interested in the science, take a look at this solar energy experiment.
Be sure to read about the vehicle described above: Steel Tortoise - grandfather of the ATV from the same novel; that entry has a slightly extended quote.
Comment/Join this discussion ( 2 ) | RSS/XML | Blog This |
Additional
resources:
More Ideas
and Technology from Coventry
More Ideas
and Technology by Robert Heinlein
Tech news articles related to Coventry
Tech news articles related to works by Robert Heinlein
| ODYSSEUS Solar-Powered Stratospheric Plane Flies Forever |
| Phil Nuyttnn's City Under The Sea |
| Stick-On Tape Speakers, As Predicted By Bruce Sterling |
| Has Climate Change Already Been Solved By Aliens? |
Want to Contribute an
Item?
It's easy:
Get the name of the item, a
quote, the book's name and the author's name, and Add
it here.
| <Previous | Next> |
|
|
|
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
|
'Thus it came about that the search for a planetiferous sun... was not unduly prolonged...'
'The planes flew continuously, twenty-four hours a day...'
'The auto-treadmill's bumps and gullies matched whatever terrain the goggles showed me...'
'Give me an old-fashioned tetragon on a central pivot every time.'
'An alien drug... Used by an insect race... It can repair bones and organs. It can grow new tissue."
