SpaceX Using Deep Cryo Liquid Oxygen

A dish best served cold SpaceX uses supercooled, “deep cryogenic” liquid oxygen, or LOX, to propel its Falcon 9 rockets. This is colder than more commonly used liquid oxygen which is chilled only to its condensation temperature. Principle 35 – Parameter Change The advantage is that the oxidizer is more dense, allowing SpaceX to cram more onto their rocket.…

What Happened To The Tweel?

Tweel nice Conventional pneumatic tires use air pressure to maintain their shape and resistance to weight and driving forces yet also cushion the vehicle from road imperfections. Principle 29 – Pneumatics and Hydraulics Michelin has developed an airless tire called the Tweel. This is a merging of tire and wheel into an integrated unit.  Principle 5…

Compact Toilet Rolls

Ah, the glamour of international travel. I thought this was cool. This is a package of toilet paper we picked up at the nearby Walmart on our vacation in Puerto Vallarta. Notice that the inner rolls are flattened to reduce the overall packaging size. I’d never seen this before. Since toilet paper is lightweight it’s…

Split Air Conditioning Systems

Canada has summer too, eh I talked about how air conditioners worked in a previous post.  Living in Canada, if houses have air conditioning they are usually tied into a central forced air heating system. Principle 5 – Merging The same fan, thermostat, and set of ducts and vents can be used for cooling or heating. Principle…