Are Electric Planes Possible?

Credits:
Narrator/Director: Brian McManus
Research Assistant: Josh Silverman

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Thank you to my patreon supporters: Adam Flohr, darth patron, Henning Basma, Karl Andersson, Mark Govea, Hank Green, Tony Kuchta, Jason A. Diegmueller, Chris Plays Games, William Leu, Frejden Jarrett, Vincent Mooney, Ian Dundore, John & Becki Johnston. Nevin Spoljaric, Kedar Deshpande

[tod]

“Hey guys, don’t worry, we’ll give you a formula sheet on the exam”
The formula sheet:
Momentum = mass • velocity
The Exam:
If we were to take a Cessna plane, and convert it’s fuel source to battery power, what would be it’s ideal flight time?

[redmondokelly]

Really liking the new thumbnails, they look so clean and nice.

[amanabananas]

me: *falls asleep during physics*
me: *wakes up*
teacher: 5:05
me: *concerned*

[valentinegutsa]

Now i know what my dog feels when im speaking to it

[TierZoo]

Psyched for the next episode! Always been curious how hydrogen works as fuel.

[Rin-qjzt]

i love this. it's like all that math from school, but actually relevant to solve interesting problems.

[ianmacfarlane]

What about if we use Duracell?
Eh?
You never thought about that, did you?

[Daa]

1:37 Talks about regular planes.
**Shows a Concorde.**

[TheBoneCharmer]

I absolutely love your videos.
They never feel rushed but rather polished.

Yes, I read many books to learn the concepts. However, nothing will link these concepts to real life like the way you do my friend.
Invested in Brilliant after seeing you recommend it with heart countless times and it is worth every cent.

[ll]

2:57 "What is delta V"
Ksp players: Whomst has summoned the almighty one.

[erbro]

There's a joke about Belgians I particularly like (I'm Belgian btw)
The Belgians invented an electric car. Costs 1 million dollars though. 100k for the car, the rest for the extention cord.

[dutchflats]

Did you account for the efficiency differences between fossil fuel powered engines and electric engines or the fact that liquid fuels are used during flight which lowers the planes mass as it flies on over time vs. electric powered aircraft which don't lighten their load with duration?

[KBE]

Starts watching. Sees explanation about batteries being 40x heavier than kerosine. Makes sense, I'm happy I know this now. But starting at 2:12 I felt more and more stupid and I should go back to my coloring book :(

[fakshen]

Hold on a moment... as the conventional aircraft burns fuel, it also becomes lighter. The electric aircraft's weight would remain the same. The performance of the conventional aircraft would increase over time as the amount of fuel on board burns and exhausted through the engines.

[sharkycat]

Start a new channel called “Simple Engineering” for us plebs

[RyanSmith-xblh]

Me 7 minutes into this video: is that a no?

[koriko]

8:56 This guy seems to have MUCH bigger problems than equations. Lol

[marcwenger]

Very informative. Another interesting point is that airplanes get lighter in flight as they proceed, whereas battery mass doesn't change. This results in airplanes departing and arriving with the same mass. On conventional aircraft that would be an overweight landing. Battery powered aircraft would need reinforced landing gear and therefore have added mass

[jammingboss]

Hi, good video but I noted two small mistakes. 1) (delta x) /t = v, not delta v. Delta v represents the acceleration, not the speed. 2) Doubling the mass, will not increase the power demand by 8. It will increase it by 4, even though there is a 2 factor in the equation. Let's say for example that P1 is the power of the light aircraft and P2 is the power of the heavy aircraft and that M1 is the weight of the leight aircraft and M2 is the weight of the heavy aircraft. If the heavy aircraft has twice the mass of the light aircraft, it means that M2=2*M1. If you plug 2*M1 in the equation to find P2 and then you divide P2 by P1. P2/P1=4 (the factor 2 cancels out).

[jodykemper]

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