harrier vertical lift off

[Gorgi Knootewoot 0]

For some reason i cannot figure out to lift of or land with the harrier vertically. I tried autohover but it still goes forward and not up/down. When im on the ground and use it i can see that the turbines are blowing because of the wind animation (although they are still pointing backwards). But i can't get of the ground except forward.

Can anyone help me with this

[Guest Ti0n3r]

Lift: Auto hover: On & flaps down to max. And off you go

[NoRailgunner 0]

ArmA-wiki can help too

<span style='color:red'>Readme STOVL</span>

[celery 8]

Why does the Harrier need to move forward before taking off when it can hover up and down while in the air?

[the_shadow 0]

becouse fully armed it´s too heavy to take off vertically, besides it only have cooling water for the engines for 30 seconds of hovering, then the engine will break down and the plane crash...

thats why it only lands vertically and never hovers in mid flight or take of vertically even though it can hover for 30 seconds...

[Noraf 0]

and besides, the harrier is a stovl, not a vstovl capable aircraft

[frederf 0]

Unless something has changed very recently the AV-8B Harrier in Armed Assault 1.08 cannot do strictly vertical takeoff. The best you can do is a short run to 60 kmph with nozzles down and flaps full. The real jet can only do a vertical takeoff when the takeoff weight is low enough and they mostly don't do it due to the stress on the aircraft, safety factor, fuel required, etc.

I seem to remember this 'fact' coming up in a previous thread on this very same topic (there's about 1 every week or so asking this). Anyway someone disputed this "water for nozzle cooling" as B.S. Ah it looks partially true:

Quote[/b] ]We have learned that the Harrier carries a certain amount of cooling water that is needed to prevent the Pegasus turbofan engine from overheating during hover. If operating conditions are such that the water is needed at the maximum cooling rate, there is only enough water available to remain in hover for about 90 seconds before the supply is exhausted. However, the aircraft rarely needs to use this cooling water at the maximum rate, and can therefore hover for considerably longer than 90 seconds. We're just not sure how long "considerably longer" is. We've observed the Harrier hovering at airshows for periods of time on the order of 5 minutes or more. Based on these numbers, our best guess is that the maximum time limit over which the Harrier can maintain hover is probably around 10 minutes or so. We will continue our research into this issue to locate a more conclusive answer.

http://www.aerospaceweb.org/question/planes/q0123.shtml

This on the other hand is rather false

Quote[/b] ]and besides, the harrier is a stovl, not a vstovl capable aircraft

The Harrier is VTOL capable under many conditions.

[JAMF 0]

nm, it has been said already.

[Gorgi Knootewoot 0]

Thanks guys

[Correction 0]

Because contrary to popular believe, "vertical takeoff" in real life does not mean you can expect to see something out of Star Wars.

I don't, however, quite understand how you're supposed to land with auto hover enabled. I usually end up stalling over the runway and hovering around like a helicopter unable to touch down. D:

[D007 0]

to take off.

flaps down, pull the nose up, gas it only enough to start moving then pump the gas from time to time as needed..

still not totally vertical though..

landing..

auto hover.. then tip your wings from side to side and reduce gas, even brake it.. if u roll backwards, starting to loose control, gas it only slightly or youll nose dive, then level out, and start again.

tip the wings from side to side.. helps alot to land, and makes u land faster.. better for hostile situations..

[[aps]gnat 28]

I work with ground based turbines and suspect the word "for cooling" is incorrect.

I don't know the details of the harriers engine but typical water is used is several ways to provide "power augmentation".

1) Inlet Fogging - reduces inlet air temperature - engine can "suck" and compress more air.

2) Interstage water injection - water is flashed off and its ethropy/energy is added to the air about to enter the combustion area

3) Saturation cooling - direct cooling of high temperature parts so that the "firing" temperature of turbine can be temporarily increased.

I suspect the water is being used as interstage injection to provide a higher horsepower capability, not for stop stuff from melting. This would allow the harrier to hover much more safety because it will have more power to make adjustments. If it didn't have the extra power available (depending on fuel and weapons load) it would have little to no margins to make an "up" movement if it got into trouble. An example is if the pilot found he was descending too fast, he needs much more power to slow/stop/reverse his decent BEFORE he hits the ground.

Use of water would be limited for several reasons a) it subjects the engine to extra strain b) water even though its "flashed off" still erodes the inside parts of the turbine, reducing life and efficiency c) higher thermal stresses within the engine d) you can only store so much on the plane

http://scitation.aip.org/getabs....ifs=yes