8 June 2026 - Approx. 9 min read
Although the chemicals in rocket propulsion have changed over the years, from kerosene and liquid hydrogen, to complex ammonium perchlorate compounds and more recently liquid methane and oxygen, the basic idea of how it all works is the same - following Newton's idea of action and reaction (or conservation of momentum), if you shove stuff out the back of a rocket, it pushes the rocket forward. The more mass you shove out, and the faster it's shoved, the quicker the rocket moves.
30 January 2023 - Approx. 2 min read
As most readers will know, I live in Auckland, which has been subject to torrential rain this weekend, resulting in wide-spread flooding, and three people dead, so far. It was certainly a record-setting event, with close to 300 mm of rain recorded over a 36 hour period at one site, and nearly 250 mm of rain at Auckland Airport (which was closed due to the resulting flooding). It's fairly safe to say that the amount of rain we got can be attributed, at least partly, to climate change. Expect more of the same in coming years.
30 January 2023 - Approx. 2 min read
One of the most frequent questions I encounter, whether serious or not, is about driving an EV in the rain, or through a carwash. Of course, EVs are well built, and the normal expectation of driving is that they encounter wet weather all the time. Of what use would windscreen wipers be otherwise?
19 September 2022 - Approx. 1 min read
This past weekend has been a pretty skeptically-active weekend for me.
