is flying up then down in a rocket faster then flying in a plane?

Answer 1

Yes.
This is the concept of an ICBM, and also of a ramjet/scramjet.
In 2003 NASA test-flew the X-43A unmanned extra-atmospheric scramjet (vertical rocket takeoff, glide landing, intentionally crashes rather than landing).

Atmospheric drag is a huge limiting factor, it converts your energy into useless heat and turbulence, and it's proportional to v^2. Eventually you are structurally limited to a speed that does not apart or melt the airframe (need to use water cooling on the skin).

Once you get up to the stratosphere that speed constraint disappears.
Then the only limiting factor is that you have to start slowing down so you don't burn up on reentry or bounce off the atmosphere (e.g. Space Shuttle).

The 1983 television movie "Starflight: The Plane That Couldn't Land" mentioned in the Wikipedia article below explores the concept of a hypersonic jetliner for passenger transportation: "The jetliner uses scramjet engines to reach a point high in the stratosphere for a quick two-hour jump from Los Angeles to Sydney, and the engines are powered with hydrogen."

I think AKL's comment is not correct: atmospheric density decreases exponentially with height, so the higher you go, the less drag (also less lift). ICBMs get this benefit even from sub-atmospheric flights.
The shortest paths are pure ballistic trajectories, you forget about lift so you design small wings and a big engine. The scramjet design means you don't need to carry oxidizer for most of the trip, only for takeoff and to get you to base velocity, for which you need a rocket or jet engine.

Answer 2

It depends on how high the two aircrafts fly.If it is still in the atmosphere, the bothwill almost be the same.If it is above the atmosphere(statosphere etc),the rocket will fly faster than the air plane as the rocket's engines are made especially for those heights.
Also, the weight and type of aircraft is put under consideration.

Answer 3

Yes flying up in rocket is faster than in a plane , but note that no flying down in a rocket ( in atmospheric space)

Answer 4

No, no longer achievable. The cones in front of the engines on the SR-seventy one have been used to sluggish the airflow into the engine to subsonic speeds. regarded what handed off to the X-15 for the duration of one in each and every of its extreme velocity flights. First video records fairly some the wear and tear after a Mach 6.7 velocity run. plane replace into made out of a nickel alloy called Inconel. word how numerous the plane won warmth injury. No, there should not be a desire for a fighter to hit speeds of Mach 6 or swifter.

Answer 5

yep but i havnt tested it