New answers tagged

4

What if the umbrella were made from the esophaguses of a Great Wyrm Red Dragon? The umbrella might well survive and be found smoking, deep in the wall's crater directly behind where the player -used- to be.


5

Frame Challenge: The premise of the original thread is wrong The original theory is as follows: A pure iron wall has 30 HP per inch of thickness and Hardness 10. A Great Wyrm Red has a breath weapon that does 24d10 Fire Damage in a 70 ft. cone. Maximum damage is 240, which is halved against objects for 120, which is then dropped by 10 because of Hardness. ...


1

For most missions, take the Mark 47 A guided missile is nice, but the biggest advantage of the Javelin and other guided anti-tank rounds is it's attack profile. It climbs up and then attacks from the top, where the armour is the weakest. You don't need that, because you're weapons platform is already above the tank. So, you just need to get explosives into ...


11

Yes, but... You can probably construct an umbrella which deflects and protects that which is immediately behind it from immense heat, however, without a thermal protection system like a thermal suit, anyone in the vicinity of such heat would probably roast simply by proximity. For example, there's NASA's ADEPT program where they developed an unfolding heat ...


4

The Wall Would Explode Before it Melts You can not "melt" the wall in any thematically satisfying and meaningful since of the word. Ash's energy calculations do a good job of expressing how much thermal energy it would take to melt the wall; so, no need to repeat his work, but the real world point that it misses is that that much energy in such a ...


16

Umbrella vs a kiloton nuclear warhead. Even ones made of unobtainium and blessed by all the gods will be vaporised in an instant. Lets take a look at that wall melting, and try to work out the power in the dragons breath So, melting point of iron is 1538 degrees C Lets assume Earth global average temperature at the spot the attack happened (15 degrees C). ...


7

No you can't The breath is simply too hot. If it hits the umbrella and it holds, you'll still be exposed to incredible heat from all sides where the breath goes past you. It is able to liquify 4 inches of metal on an 80 feet surface! Assuming steel, that is 1510C or 2750F! But it's much, much hotter, as it can liquify 4 inches deep. In. A. Breath. The flash ...


6

Make the umbrella with something akin to the Shuttle thermal protection system The black HRSI tiles provided protection against temperatures up to 1,260 °C. [...] These tiles were such poor heat conductors that one could hold one by the edges while it was still red hot. [...] The HRSI tile was composed of high purity silica fibers. Ninety percent of the ...


0

Wings are not propellers Bats only have a coefficient of lift of ~3.9 because their wings do a lot more up/down movement than they do back and forth. For reference: a fixed wing airplane has a theoretical max of about 2. This means that for your dragon to get that coefficient of lift AND fly 10m/sec that your wings will actually be accelerating much more ...


0

The area of a bat-shaped wing is calculated by A = (F x D5) + 0.5 (D5 x D3). F = the forearm length, D5 = digit 5, D3 = digit 3 Each square on your chart is ~1.85 meters, so your dragon has a wing area of ~220 m^2 including the hind legs and tail. Assuming normal air density at sea level, it should have a stalling speed of 42.5 km/h.


2

You might be interested in https://en.wikipedia.org/wiki/City_of_Dragons. It is unfortunately the third book in the series, but it does a great job at showing what a city designed to co-mingle with dragons might look like with very basic technology. Some things that stand out that I haven't specifically seen in the answers so far: Dragon centered buildings. ...


6

Unfused bones This is the most standout by the cheetah, because a cheetah's skeletal is unique in the sense that very few of its bones are fused or connected together. A human has problems rotating their shoulder because the way that the ball-and-socket joint works - a cheetah, on the other hand, can more or less move the entire shoulder, joint and all, ...


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