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jason.bourne
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why propeller airplanes have superior take-off performance than jet airplanes?
jason.bourne said:why propeller airplanes have superior take-off performance than jet airplanes?
jason.bourne said:okay! this guy at the other forum makes this point which is quite confusing to me.
here's is what he says
" All aircraft's Climb Rate depends upon excess Power available. For the jet, Power, and excess Power increase as the aircraft fly at higher speeds, with excess Power reducing at very high speed as Drag builds up, and the Power Required increases. That's why jet aircraft Climb at very high speed, typically at, and sometimes above, normal cruising speed. For the same reason in REVERSE, best Climb speed for a piston aircraft is somewhat below cruising speed.
All of this also explains why 'prop' aircraft generally have superior Takeoff performance (High low speed Thrust) with modest cruise performance, whilst their jet cousins experience have inferior Takeoff performance, but superior cruise performance "
is he correct?
Cyrus said:I'm not sure what the thrust of a jet engine looks like as a function of speed, but he may well be correct.
We have small airports around here with short runways. Having had clients fly in with both small jets and turbo-props (and conventional prop-planes) I can assure you that the folks with the private jets needed a lot of room to get off the ground, while the folks with the turboprops jumped off the runways quite promptly. I always assumed that being able to change the prop pitch allowed the turbo-props to "claw" their way through the air and gain altitude quickly. Could be wrong about that, but turbo-props seemed to be pretty muscular at take-off.jason.bourne said:and suppose if : Two identical aircraft of equal weight, one powered by turbojet, the other by turboprop, are lined up on parallel runways. Both will fly their maximum rate of climb performance. how do we compare their AOA and TAS?
my answer to this is ' AOA for the prop is higher & TAS for the jet is higher'.
m i correct?
The main difference between propeller and jet airplanes is the type of engine they use. Propeller airplanes use a piston engine that drives a propeller, while jet airplanes use a gas turbine engine to produce thrust.
Generally, jet airplanes are faster than propeller airplanes. The gas turbine engine used in jet airplanes produces more thrust, allowing them to achieve higher speeds than propeller airplanes.
Yes, propeller airplanes are typically more fuel-efficient than jet airplanes. This is because the piston engine used in propeller airplanes consumes less fuel than the gas turbine engine used in jet airplanes.
For short distances, propeller airplanes are usually the better option. They have a shorter takeoff and landing distance, making them more suitable for smaller airports and shorter runways.
No, jet airplanes generally have a longer range than propeller airplanes. This is because they can fly at higher altitudes and speeds, allowing them to cover longer distances without needing to refuel.