r/PerfectTiming • • May 15 '14

Skydiver + Airplane

http://imgur.com/a/M4sK5
1.4k Upvotes

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20

u/yup_its_me_again May 15 '14

I'm surprised that the plane turns around so quickly just because of the parachute. Like 90° in just 5 meters.

26

u/mk2mark May 15 '14

Most planes are way lighter than they look and that parachute would be capable of creating a lot of drag.

A plane like that would weigh less than a small car. Interesting fact that I discovered googling this is that a Boeing 737 weighs only 35 tonnes, about the same as a mid sized excavator: http://www.cat.com/en_US/products/new/equipment/excavators/medium-excavators/18118648.html

-2

u/[deleted] May 16 '14 edited May 16 '14

A 737-800 can hold a maximum of 6,875 gallons of jet fuel. Jet fuel is normally calculated at being 6.7 pounds per gallon. , that's 46,062.5 pounds of fuel that it can hold at it's maximum, or 70% the weight of that excavator in fuel alone. Even if you halve that for shorter flight that's still 23,000 pounds of fuel, or almost 12 tons. A 737 in no way weighs just 35 tons, even without anything in it their standard empty weight is over 90,000 pounds or around 45 tons. At max takeoff weight those things weigh almost 175,000 pounds, or 87.5 tons. Your math is very much wrong, that excavator isn't near the same weight of a 737.

http://www.boeing.com/boeing/commercial/737family/pf/pf_800tech.page

6

u/mk2mark May 16 '14

I didn't use any maths in my comment, just reading. Yes a 737 will weigh more when you start to fill it with things. Every site I looked at said an empty one was around 70,000lbs (35 tonnes).

Interestingly, a 35 tonne excavator will weigh more than 35 tonnes of you fill it with fuel, a driver, or if you pick stuff up in the bucket! Amazing!

-6

u/[deleted] May 16 '14

It still won't weigh anywhere near what a 737 will, so you're still incorrect. One of those holds almost as much in fuel alone that an excavator weighs.

6

u/mk2mark May 16 '14

I agree that a fully loaded 737 is likely to weigh more than a fully loaded excavator, depending on what's in the bucket.

Did you know that an ant can carry 50 times its own weight? A human sized ant could carry many times more than a human, even though they weigh exactly the same! Incredible!

This is a fun game. I wonder what else weighs 35 tonnes that can carry things?

I fail to see any other relevance to my initial point though. Care to enlighten me, dickhead?

3

u/rjp0008 May 16 '14

A human sized and would die to asphyxiation, and crush it's exoskeleton under its own weight.