History Analysis / MilitaryMashUpMachine

9th Nov '17 5:53:47 PM Kakai
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Leaving aside the difficulty the plain would have returning to its mothership, and the problem of waterproofing the airplanes (and their jet engines), an aircraft carrier is the exact opposite of hydrodynamic, meaning it would move slower and require greater amount of power to move it through the water, necessiting larger power plants. Larger power plants mean far greater noise and heat generation, which increases the sub's visibility - and the entire point of making something submersible is to make it as close to invisible as you can.

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Leaving aside the difficulty the plain plane would have returning to its mothership, and the problem of waterproofing the airplanes (and their jet engines), an aircraft carrier is the exact opposite of hydrodynamic, meaning it would move slower and require greater amount of power to move push it through the water, water than its non-aircraft carrying colleagues, necessiting larger power plants. Larger power plants mean far greater noise and heat generation, which increases the sub's visibility - and the entire point of making something submersible is to make it as close to invisible as you can.can.

!!Amphibious Tanks
You're in luck! Those are actually real.

!!Amphibious Airplanes
Here the problem is threefold - speed, mass and propulsion.
* '''Speed''': The chief enemy of a plane attempting to go underwater is speed. At speeds high enough for the plane's wings to lift it, meeting with the surface of the sea would be roughly equivalent to colliding with a concrete wall, and while the plane's aerodynamic shape could carry the main body into the water, the wings would be essentially torn off.
* '''Mass''': Planes are generally built to be light - otherwise, they wouldn't be able to lift off the ground. Unfortunately, that also means they are not particularly inclined to go ''down'' (luckily), so if you managed to get your plane underwater, it would pop back to the surface due to being too light to sink (assuming the plane is waterproof, that is). And if it didn't, the light mass doesn't make the plane particularly tough - the water pressure alone would crush it at even shallow depths.
* '''Propulsion''': To put it shortly, jet engines don't work underwater, and neither do aircraft propellers.

!!Flying X
Ultimately, it all comes down to mass and aerodynamics. Land and sea vehicles aren't aerodynamic, and their mass is measured in tonnes, or even thousands of tonnes, which means they will be unable to cast off the chains of gravity in the first place.
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9th Nov '17 5:31:51 PM Kakai
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The chief problem here is that an airplane launched from such a carrier would be pretty much unable to return to the ship - the current aircraft carriers have the smallest possible runways, and even then landing on them is more of a controllable crash than it is a safe landing. Additionally, keeping the machines waterproof is extremely problematic, as the machines are either kept outside or behind a courtain door - and the RealLife section of the main page can explain to you how ''this'' went down.

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The chief Leaving aside the difficulty the plain would have returning to its mothership, and the problem here is that an airplane launched from such a carrier would be pretty much unable to return to of waterproofing the ship - the current airplanes (and their jet engines), an aircraft carriers have carrier is the smallest possible runways, exact opposite of hydrodynamic, meaning it would move slower and even then landing on them is more require greater amount of a controllable crash than power to move it is a safe landing. Additionally, keeping through the machines waterproof is extremely problematic, as water, necessiting larger power plants. Larger power plants mean far greater noise and heat generation, which increases the machines are either kept outside or behind a courtain door sub's visibility - and the RealLife section entire point of the main page can explain making something submersible is to make it as close to invisible as you how ''this'' went down.can.
9th Nov '17 5:27:20 PM Kakai
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!!

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!!
!!Sumbersible carrier
The chief problem here is that an airplane launched from such a carrier would be pretty much unable to return to the ship - the current aircraft carriers have the smallest possible runways, and even then landing on them is more of a controllable crash than it is a safe landing. Additionally, keeping the machines waterproof is extremely problematic, as the machines are either kept outside or behind a courtain door - and the RealLife section of the main page can explain to you how ''this'' went down.
9th Nov '17 5:21:40 PM Kakai
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Added DiffLines:

!WhyWeCantHaveNiceThings
So, why won't those wonderful mash-up machines work?

!!Land Battleship and other giant land vehicles
The main two issues here is mass and size.
* '''Mass''': Any wehicle that big will, quite simply, sink into the ground it stands on - and if that ground happens to be muddy or swampy, good luck trying to get it out. That is, if it will even move at all - the engine required to move something this huge would probably take up most of the vehicle, move it slowly, and, unless its world has some exotic power source, consume truly horrifying amounts of fuel.
* '''Size''': Imagine taking a megatank through a mountain pass. It'd be a horror - such a vehicle would be too wide to fit on a road, and too heavy to climb the incline[[note]]Real-life vehicles of comparable mass - trains - "climb" mountains by being pulled by a chain going between the rails underneath them, powered by an external engine[[/note]]. And you don't even need a mountain. The mighty vehicle of mass destruction would get stuck trying to climb a hill the moment it leaves the plains most such machines tend to dwell on.
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http://tvtropes.org/pmwiki/article_history.php?article=Analysis.MilitaryMashUpMachine