For props, P=TV; therefore, for given power, thrust decreases as velocity increases. Thrust output of a jet, on the other hand, is largely independent of velocity. Still, it's good to know we have people smarter than Peter Garrison posting here to keep us all straight. Thanks for that.I hope the editors of Flying are as embarrassed by that article as I am for them.
'A propeller depends on the surrounding fluid medium to produce thrust, whereas a jet does not....'
Really? Try plugging that hole in the front & see how that works out.
That's nonsense. Helicopters work by simple Newtonian physics, they continually throw money at the ground until the weight of the money is greater than the weight of the helicopter. Propeller planes throw money at the wings, they only fly if you use enough money and more goes under the wings than over. Gliders merely set a pile of money on fire, then thermal in the heat for lift. Jets are actually hydraulic in that they set compressed money on fire, use the smoke to run a big fan to cool the burning money, then use more compressed money to raise the temperature again, and are propelled entirely by the tears of your accountant.And helicopters don't fly. They beat the air into submission.
That's also true, but it's also true for piston engines, up to a point. The difference is that jet thrust doesn't fall off with decreasing air density like propeller thrust does, so you still have enough thrust to fly at the altitudes where drag is reduced.I thought jets flew higher because that is where there is less drag for a given true airspeed, and therefore where the turbofans are mostly tuned for optimal performance.
And that in a nutshell is why smooth lines and good energy management are so important in jet racing. With a propeller, if you happen to slow down, you have more thrust available to get back up to speed. With a jet, you have to dig your way out with the same amount of thrust you went in with.For props, P=TV; therefore, for given power, thrust decreases as velocity increases. Thrust output of a jet, on the other hand, is largely independent of velocity...