Quiz 1(3 points)
Tuesday, 19 Feb 2019
1. Explain briefly the themes of this course.
This course aims to be global and current in its coverage, and interactive in its mode of delivery. That is to say we are interested in contemporary issues covering or affecting the world of aerospace and society as a whole. Also, students are encouraged to participate in the presentation and discussion of the topics directly from contemporary media.
2. What were the three subjects discussed last week.
The technology and regulations needed to defend against rogue drones.
The development of x-ray transceivers for space communications
Successful Chinese mission to the far side of the moon.
3. What is the one most important idea you learned from last week’s topics.
[For example]
A 3-D radar can be used to detect small drones within a range of 2-3 km.
X-rays can be used to communicate during the re-entry phase of a spacecraft.
China has the interest and technology to become the first nation ever to reach the far side of the moon.
Quiz 2 (3 points)
Tuesday, 26 Feb 2019
1. How much electrical energy can be stored in a kilogram of Li-ion battery today?
About 150 Wh/kg.
2. How much is required for regional aircraft?
400-500 Wh/kg
3. What are some of the benefits of electric flight?
Less mechanical complexity such as no gearbox, light, zero CO2 emission, much less noise, and high torque suitable for rotational motion, easily to integrate with solar energy storage.
4. What is the lift-to-drag ratio for a glider, light aircraft, and typical electric aircraft?
Light aircraft 10:1
Glider 15:1
Electric aircraft 20:1 and upwards required.
Quiz 3 (3 points)
Tuesday, 5 Mar 2019
1. Compare high flying pseudosatellites with other surveying and sensing technologies in terms of design, technology and operation.
2. What do you think is the most interesting fact about Mars Rover Opportunity?
3. How much electrical power can you get from an average 1m2 solar panel available today on the market?