On Wed, 2006-03-08 at 22:49 +0100, Georg Vollnhals wrote: > Ron Jensen schrieb: > > > > > Since there is no dragchute I decided to add a tailhook. ;) O/o raises > > and lowers it, but it doesn't do anything but it looks good. While I > > was at the looks thing I redid nose wheels, now they have a rims and > > steer. I also fixed the intakes and started texure mapping. > > > > Let me know how it flies! > > > > Ron > > > Hi Ron, > thank you for the improved F4E (hook! and other stuff). > > I did some short testflights, no time for more now (-> weekend :-) )
There is room for 720 gallons (4752 lbs) more fuel in tank[2] and tank[3] so you can do a long x-country. > Start and landing is fine. > > As for landing speeds I flew 200 knts with gear down and full flaps > descending to 180 knts and touch down at 160 knts - just trying as I > have no real numbers, and it was a soft and nice landing. I'm lacking 'real' numbers, too. There is a QF-4G document on http://www.simpits.org/ that gives some clues. (F-4E/F-4F/F-4G's are virtually identical airframes.) 3.14.7.1. Flight maneuvering, except stall demonstrations and confidence maneuvers, is limited to a maximum of 25 units AOA, excessive wing rock, or 175 KIAS, whichever occurs first. When these limits are exceeded, aircrews will devote primary attention to regaining an AOA condition of 25 units or less, and airspeed at/or above 175 KIAS. Should any delay be incurred in reestablishing operating parameters within these maximum and minimum limits, a "Terminate"/ "Knock-it-off" will be initiated. Airspeed decreasing to 150 KIAS will result in an immediate "Terminate"/"Knock-It-Off" and recovery. > The F4-F is in category "E" landing minima = "166 kt or more but less > than 211 kt IAS, speeds based on 1.3 times the stall speed in the > landing configuration at maximum gross landing weight" due to the > Military Aeronautical Information Publication Germany Aug 2002. These sound like accurate numbers. The model as configured is fairly heavy as it has alot of fuel onboard. > I was not really satisfied with the inflight stability in roll axis > (unstable in medium and high flight envelope), could not get the bird > into a loop, also forced turns seem to be a little unstable. I find myself frequently exceeding 25 units of AOA, that causes the model to become very sluggish and ill mannered. Try keeping the AOA about 18 degrees in burner. It will loop. Always watch the AOA gauge and keep it under 25-30 for best performance. I believe the real F-4 had some kind of audio indication for AOA awareness. > And also "centering the ball" for coordinated flight was really a task. I think that may be an issue with the ball instrument. It was a last minute addition. I need to look into it more, I don't have rudder pedals (yet) so I have to fly with --enable-auto-coordinate. I noticed the ball bounces all over. > This as a feedback, no critics, under the assumption that I am no > military pilot and don't know how such a bird flies in reality. > > But also it was not a hit as a fighter in VN (MiG 21 was better) it was > developed as one and should have some fighter-qualities in flight. > > Your FG model made me read a lot about F4 the last time, increased interest! > > Georg EDDW > > ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Flightgear-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-users
