May 25, 201016 yr It would've been asked before but I can't put my finger on it.I dug out the beautiful POSKY ERJ135and - trademark POSKY it thinks it is on ice when you use nose-wheel steering, and plunges straight ahead.What should one change to make nose-wheel steering "grippier"?
May 25, 201016 yr Greetings.Yes, it is a beautiful model; I know what you mean about the steering. I made the following adjustments to improve the ground handling - make sure you back up your original aircraft.cfg before making these alterations in case you don't like them. Just copy/paste over the original sections, or rem out the current settings using ';' or '//' and then add these after them, your choice.These adjustments to the payload locations improve the balance and add cockpit weight so that more weight is shifted forward which improves traction. The yaw MOI adjustment prevents the nose swinging too much after turns:under [weight_and_balance]:station_load.0 = 360, 15.000, 0.000000, 3.000000, Cockpitstation_load.1 = 75, 13.124, 0.000000, 3.000000, Wardrobestation_load.2 = 0, 13.124, 0.000000, 3.000000, Galley1station_load.3 = 0, 13.124, 0.000000, 3.000000, Galley2station_load.4 = 2080, 13.124, 0.000000, 3.000000, Std Economy Fwd // 14 PAX station_load.5 = 2340, 0.000, 0.000000, 3.000000, Std Economy Aft // 23 PAXstation_load.6 = 1276, -15.000, 0.000000, 3.000000, Aft Baggage empty_weight_yaw_MOI = 1268455This addition includes differential braking, which assists in turns:under [brakes]:differential_braking_scale=1And just for good measure: this improves the contact points so that the nose wheel doesn't lower into the ground under braking:under [contact_points]:point.0 = 1.000, 35.531, 0.000, -9.165, 1300.000, 0.000, 2.000, 55.000, 0.300, 2.500, 0.750, 9.000, 10.000, 0.000, 250.000, 280.000 // Editedpoint.1 = 1.000, -3.969, -6.705, -10.390, 1600.000, 1.000, 2.200, 0.000, 0.800, 2.500, 0.900, 13.000, 15.000, 2.000, 250.000, 280.000 // Editedpoint.2 = 1.000, -3.969, 6.705, -10.390, 1600.000, 2.000, 2.200, 0.000, 0.800, 2.500, 0.900, 13.000, 15.000, 3.000, 250.000, 280.000 // Editedand this improves the VC view perspective:[Views]eyepoint = 30.5625, -1.30, 1.00None of these alterations affect the CoG. Don't forget to turn at a reasonable speed; 10-12kts is plenty.;)
May 25, 201016 yr WingZ,I am willing to bet that the nose wheel contact point is too far forward, and the main wheel cnt pts are too far backwards. But if you move them, then you would then need to adjust the vertical height (about 0.5 or so) of both, so wheels don't 'float' or be burried underground. I dont' have this model, so can't tell for sure. If you adjust the wheels, then it will turn on a dime, at 10 kts IF you use throttle AND tap (not hold) the differential brakes. More tap, more turn (at same throttle and steering). You could also change the steering (value of '55.000' ) to 40.000. Might help.I ran into this link: 'http://www.cat-tamer.com/flightsim/inst_erj145.html :a how-to' for 'Ultimate' install of the CRJ-145. Thought you might enjoy this.CBNapamule
May 25, 201016 yr Nothing much to say here except that the 747 series also has the same problem, along with the 767. Danny
May 25, 201016 yr Author Microlight: I applied those changes, and it certainly improves things, to the point that I don't miss the runway turnoff any more ;)But I found that the nosewheel still didn't track visually, according to steering angle, soNapamule: I picked up on your steering angle cue, but went the other way! I randomly used a value of 90, and it looks pretty good...Many thanks for the link to the ultimate 145, I'll go spend some quality time there.POSKY is like that, I did a comprehensive "build" of their B777 and it's worth the (considerable) effort. Deltalpha: Yes, it's a common issue on POSKY models, the B747 is in my sights too.Thanks for the help in making this lovely model behave better, here's a gratuitous shot or three to remind y'all.
May 26, 201016 yr WinZ,Looks good! Snazzy a/c. Glad the tweaking helped. I came in here to just look, as I have been doing my OWN 'unltimate' install of the Posky/PSS 777 (so called 'merge'). What a mess. But I did get some of it sorted out. I don't fly or tweak heavy iron usually. A 'friend' got me into this 'merge' business. Now I can't quit. Full steam ahead! (Except this 'merge' problems have been around since 2007, or so I understand. No matter. I am hard headed (hehe)).What air file do you use? Just curious. I found that 'Boeing 777-200ER GE 90-948B.air' (by Yosuke Ube-for 'Project Opensky-B777-200ER (PW), ver 2-2008-1', with Registration 'JA708A') works good in both FS9 and FSX. I got it from a recent upload of a Pakistan paint ('PIA') for FSX, by Ahmed Ahsen. That air file is perfect. Works in FS9 and FSX both. But 'match' his cfg values for your cfg (best results).Please, let me know which air file (long file name) 'worked' for you (LR? ER? GE? PW?). When I sort this part out (not all air files working with ILS approch in FS9, not enough speed (N2=77%=340 kts) yet EGT=780 C, landing on nose wheel, no enough flap drag,etc) I will tackle the VC panel 'issue'. Thanks.CBNapamule
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