Every airplane has its own speed limits. Most small and commercial planes fly below Mach (the speed of sound). Military fighters and some other planes, like Concorde, fly above Mach, or supersonically.
Some airplanes fly through hurricanes to get wind speeds etc.
Airplanes all have different speeds.
Jet airplanes use turbine engine propulsion which provides a far greater amount of thrust than any conventional propeller or turbo-propeller system. This has allowed many modern aircraft to reach speeds greater than the speed of sound or "supersonic" speeds.
James M Luckring has written: 'Theroetical and experimental analysis of longitudinal and lateral aerodynamic characteristics of skewed wings at subsonic speeds to high angles of attack' -- subject(s): Aerodynamics, Airplanes, Lateral Stability of airplanes, Longitudinal Stability of airplanes, Stability of airplanes, Lateral, Stability of airplanes, Longitudinal, Wings
b747-200
i think 30mph
260mph
Helicopters can land on small ships, clearings in forest, on top of buildings etc. Airplanes can not do these things
For your safety and the safety of others.
They can reach top speeds of 170 MPH.
Boeing aerospace manufacturing was based out of Seattle, and at the time it was thought in the industry that all new airplanes would travel at supersonic speeds.
about 600mph at about 70,000 feet and 1,200mph at higher heights.