On Thursday 25 May 2006 12:30, Georg Vollnhals wrote: > <!-- > Harriers have little "reactor" jets to change the aircraft's > orientation during hover. I've been unable to find a good > reference for where these are, exactly. I've chosen to put the > pitch and yaw jets in the tail, and the roll jets point down from > the wingtips. This makes logical sense, but I'd be pleased if > anyone can find better info. > -->
"To cater for jet-borne flight, where the aerodynamic forces on the conventional surfaces are reduced or eliminated, a system of air jet reaction control valves are utilised. These are placed in the extreme nose, tail and at the wingtips to provide pitch, roll and yaw control. The system uses air bled from the high-pressure compressor of the engine and the valves are opened using pilot commands from his normal controls. Indeed, the valves at the wingtips and in the tail are directly linked to the aileron, tailplane and rudder so that when each of these surfaces moves its corresponding valve also opens. This occurs during both wing and jet-borne flight, but as the engine bleed is only operative when the main engine nozzles are vectored below 20 degrees no jet reaction force is produced unless the aircraft is partially jet-borne. The interlinking of the aerodynamic and reaction controls, allied to the progressive increase in the amount of air bled from the engine with increasing nozzle vectoring above 20 degrees, ensures that the aircraft is fully controllable at all airspeeds and during transition." From www.harrier.org.uk (/technical/Basic_TechNet.htm) It's great to see a 3d model for the harrier in fg at long last - and a Sea Harrier, too! Stand by for some very odd looking flight profiles on fgfs.i-net.h :-) My only request at this stage is an easy one - that the aircraft starts off with the parking brake engaged. There are few things more irritating than having the fg screen fade in only to find yourself pitching off the carrier deck or into the nearest windsock! Cheers, AJ ------------------------------------------------------- All the advantages of Linux Managed Hosting--Without the Cost and Risk! Fully trained technicians. The highest number of Red Hat certifications in the hosting industry. Fanatical Support. Click to learn more http://sel.as-us.falkag.net/sel?cmd=lnk&kid7521&bid$8729&dat1642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
