ASTA01H3 Lecture Notes - Lecture 11: Turbofan, No Air, Avro Lancaster
Document Summary
No hovering (there"s only one military jet that actually does that) Gravity pulls down, but if we also move horizontally, we get further. But air"s a bitch and slows us down. Technically, if you throw a ball harder and harder, it"ll go further and further, it"ll keep going and hit you in the back of the head. (in orbit) This velocity required is 8km per second. At that speed, the friction will actually break you up (re-entry) We have to travel above the atmosphere at this speed. No air you can"t use propellers or a turbofan (which actually goes 0. 25km per second), or even a military-grade turbo-fan. The only answer is rockets: take the chemicals with us and combine them in a chamber, it can actually be fast enough, but time is a concern. We need a cooling system though so we don"t get fucked. We can use rocket fuel though: it goes to and through the rockets.
