Most powerful propulsion method

[diamondpenguin]

Hey girls and women and men and boys . I was wondering what is the fastest method of propulsion in the world. We have gas cars, electric cars, kerosene planes, and  a lot of different rockets. Nuclear submarines, and a bunch of other shit. But which method is the most powerful and most energy efficient and safest? 

[Willie]

These are the fastest objects created by humans thus far:

https://voyager.jpl.nasa.gov/mission/status/

Not only did they have enough propulsion to leave Earth’s atmosphere and travel far away (also the most distant objects made by humans thus far) they also made “slingshot passes” around planets to gather more momentum using the planet’s gravitational field. That’s incredibly energy efficient. Just let gravity do the work for you!

[Carl-Richard]

Quote

Velomobiles (enclosed recumbent bicycles) have the highest energy efficiency of any known mode of personal transport because of their small frontal area and aerodynamic shape. At a speed of 50 km/h (31 mph), the velomobile manufacturer WAW claims that only 0.5 kW·h (1.8 MJ) of energy per 100 km is needed to transport the passenger (= 18 J/m). This is around 1⁄5 (20%) of what is needed to power a standard upright bicycle without aerodynamic cladding at same speed, and 1⁄50 (2%) of that which is consumed by an average fossil fuel or electric car (the velomobile efficiency corresponds to 4700 miles per US gallon, 2000 km/L, or 0.05 L/100 km).[21] Real energy from food used by human is 4–5 times more.[42] Unfortunately their energy use advantage over bicycles is smaller with decrease of speed and disappear at around 10 km/h where power needed for velomobile and triathlon bike is almost the same[43]

https://en.wikipedia.org/wiki/Velomobile

My dad owns a couple of them and I've tried one many times. A bit of an inconvenience factor some places.

[No Self]

Saturn V is still the most powerful vehicle of all time.

Safest is probably a Qantas airliner!

Energy efficiency is hard to compare. Walking would be right up there. Electric cars are vastly superior to any other kind.

[electroBeam]

3 hours ago, diamondpenguin said:

I was wondering what is the fastest method of propulsion in the world.

https://www.amazon.com.au/Multi-Orgasmic-Man-Sexual-Secrets-Should-ebook/dp/B000FC12XM