If Our Most Aerodynamic Jets Can Go ~2,000mph, How Does a Rocket Go 25,000mph for Escape Velocity

It seems that to go fast in this universe, you follow the key notion of making planes smaller and more aerodynamic to go faster. If the Lockheed Blackbird is the peak of this process and can only go ~2,000mph, how does a less aerodynamic and bulky rocket ship go 25,000mph to achieve escape velocity without being destroyed by external forces?

Thrust. Much more of it. ~32k lb/f for the sr71 and millions for a rocket. Also, the atmosphere thins as the rocket rises, enabling the thrust to have an even greater effect.

a reply to: tjack

I knew this. Good answer to a good question!

Yes but how does the rocket not get destroyed by the atmosphere at the speed it needs to exit the atmosphere (25000mph)? a reply to: tjack

a reply to: zaderamsesholloway

They're designed to withstand the forces. Not having to have wings helps a lot.

a reply to: zaderamsesholloway

The key difference between the speed of conventional jets and rockets lies in the principles of propulsion and the environments in which they operate.

Jets rely on atmospheric air for combustion and are limited by air density, while rockets carry their own propellant and can operate efficiently in the vacuum of space, enabling them to achieve the high speeds necessary to achieve orbit.

The air density, along with pressure, decreases with altitude, same with gravity.

So as you go higher, there are fewer air molecules in a given volume of space lessening the effects of aerodynamic stress.

a reply to: andy06shake

Not to mention, wings also need atmosphere of great enough density to operate. Rockets don't spend much time in atmosphere dense enough to support winged flight, and aren't going top speed in this zone either.

You don't need to go any specific speed to get to orbit if you have propulsion. You could climb at 10 feet per hour and as long as you have an upward thrust you'll eventually escape.

Rockets also lack windshields. Adding a pilot really complicates things when it comes to highspeed flight

Wings, landing gear, translucent structure, and limited G forces, plus the fact that high speed rockets are designed to operate outside of the atmosphere while jets require it

a reply to: tjack

Well, they do if the purpose is to generate lift.

I mean while both rockets and planes are vehicles that travel through the air, they serve very different purposes.

End of the day we design rockets for space travel, whereas planes operate within our atmosphere.

Aliens help, mainly the Reptilians...

How else can an SR-71 push 64,000 pounds of thrust and only go 2,000 miles per hour and a 9-stage Merlin 1C engine on Space X with over 700,000 pounds of thrust go faster?

a reply to: zaderamsesholloway

Power to weight ratio:

A brand new hellcat off the showroom floor would lose a drag race against a pro mod.

a reply to: zaderamsesholloway

The physics explains it:

Tsiolkovsky rocket equation

a reply to: loveguy

likely true, but me i prefer pro stock myself. more like real street cars.

originally posted by: lordcomac
Rockets also lack windshields. Adding a pilot really complicates things when it comes to highspeed flight

Wings, landing gear, translucent structure, and limited G forces, plus the fact that high speed rockets are designed to operate outside of the atmosphere while jets require it

The space shuttle took off as a rocket and came back as a plane.

originally posted by: Hakaiju
You don't need to go any specific speed to get to orbit if you have propulsion. You could climb at 10 feet per hour and as long as you have an upward thrust you'll eventually escape.

I always thought escape velocity was a myth.

a reply to: WeMustCare

The space shuttle took off as a rocket and came back as a plane.

That was by design and to give the vehicle a measure of reusability.

I always thought escape velocity was a myth.

I don't know why you would think that considering "escape velocity" is a well-established concept in physics.

Escape velocity is the minimum speed an object must reach to break free from the gravitational attraction of a massive body, without further propulsion, which in this instance would be the Earth.

originally posted by: Hakaiju
You don't need to go any specific speed to get to orbit if you have propulsion. You could climb at 10 feet per hour and as long as you have an upward thrust you'll eventually escape.

This is a point most people do not realize.


Although, to be more precise....


You do not need any specific speed to get to "Orbital Altitude".

If you have sufficient buoyancy, your airspeed (vehicle speed relative to the air through which it is moving) can actually be 0 MPH.


Without sufficient buoyancy, however, a vehicle must achieve a velocity sufficient to maintain its orbit at it specific altitude.

originally posted by: WeMustCare

originally posted by: Hakaiju
You don't need to go any specific speed to get to orbit if you have propulsion. You could climb at 10 feet per hour and as long as you have an upward thrust you'll eventually escape.

I always thought escape velocity was a myth.

"Escape Velocity" is not a myth.


Escape velocity is the speed a vehicle in orbit is required to achieve in order to escape the gravitational force, typically of a planet, keeping the vehicle in orbit.

a reply to: zaderamsesholloway

been waiting to see if anybody would post this, the force / escape velocity for a baseball and say space x super heavy or anything is the same. 11.2 kms or 25,000mph just enough to escape gravity.

25,000 is 25,000 no mater the size. rockets are design for the payloads and weight of the vehicle. engines are designed to achieve the power to deliver said vehicle and payload to escape velocity.

and it has been seen many times that designs don't always work. space x super heavy has failed twice this year.

a quick link,

Where,
ve is the escape speed
G is the universal gravitational constant (G≅6.67×10-11 m3kg-1s-2)
M is the mass of the massive body(the body from which the object is to be escaped from)
r is the distance from the centre of the massive body to the object
Here we can notice that the above-mentioned relation is independent of the mass of the object which will be escaping from the massive body. You may also want to check out these topics given below!
Escape Speed