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n4gix

Contact Point Issue

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Hi All,Been having problems getting what i believe to be the contact points right. As you can see below the main gear digs into the ground while the nose gear sits properly (atleast i think). All of this creates a lean in the wrong direction as the 777 has a bit of a forward lean and with this model the lean appears to be backwards or atleast nuetral at the very best.http://forums.avsim.net/user_files/175229.jpgI have no idea which contact point is which so i don't want to start messing with this. I'm assuimg this problem is contact points. here's the points...[contact_points]static_pitch = 0.1static_cg_height = 17.56tailwheel_lock = 0gear_system_type = 1max_number_of_points = 17point.0 = 1, 85.437, 0, -19.72, 1181.1, 0, 4.521, 65, 1, 2.5, 0.7235, 13, 14, 0, 270, 270point.1 = 1, -6.76, -20, -20.32, 1574.8, 1, 4.521, 8, 1.91, 2.5, 0.747, 13, 14, 2, 270, 270point.2 = 2, 30.861, -31.6723, -14.1458, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.3 = 2, 30.8612, 31.5494, -14.1458, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.4 = 1, -6.76, 20, -20.32, 1574.8, 2, 4.521, 8, 1.91, 2.5, 0.747, 12.9, 13.9, 3, 270, 270point.5 = 2, -102, -36, 9, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0point.6 = 2, -38.4, -105, 12.5, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0point.7 = 2, -102, 36, 9, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0point.8 = 2, -38.4, 105, 12.5, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0point.9 = 2, -102, 0, 44.1266, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0point.10 = 2, -88.3844, 0, 0.0661, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.11 = 2, -57.091, 0, -6.708, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.12 = 2, -44.38, 0, -8.6234, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.13 = 2, -102.1003, 0, 3.9805, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0point.14 = 2, 50.4709, 0, 13.0267, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.15 = 2, 105.0852, 0, 0.4276, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.16 = 5, 0.0, 0.0, -10.0, 1600, 0.0, 0.0, 50.0, 0.0, 0.0, 1.00, 1.0, 1.0, 0, 0.0, 0.0Any help would be greatly appreciated. ThanksKind RegardsJP

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A quick and dirty technique is to create a light with the coordinates of a contact point so you can literally see which one you are working with, and where it is so you can decide how to best adjust it.This is a favorite if you do not have the model to just get the coordinates from the part. If you do have the model, then you can also make sure that it's position (rotation about it's CG) is correct for flight before you finalize them.

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Most of the time, authors will group their contact points by function. IOW, "gear points" and "scrape points." The listing you posted is "mixed up," which makes it more of a challenge.Fortunately, it's easy to re-arrange them by functional group, as I've done for you below. The first three entries are Class #1, which means they are for the landing gear. The nose gear is "point.0", the left main is "point.1", and the right main is "point.2". I've highlighted the "vertical position" of both left and right main gear in BOLD text. Note that they are larger numbers than the main gear. Begin by setting those numbers equal to the nose gear's distance, and then tweak up/down from there.Here is a list of what each field of the contact entry means://0 Class //1 Longitudinal Position (feet) //2 Lateral Position (feet) //3 Vertical Position (feet) //4 Impact Damage Threshold (Feet Per Minute) //5 Brake Map (0=None, 1=Left, 2=Right) //6 Wheel Radius (feet) //7 Steer Angle (degrees) //8 Static Compression (feet) (0 if rigid) //9 Max/Static Compression Ratio //10 Damping Ratio (0=Undamped, 1=Critically Damped) //11 Extension Time (seconds) //12 Retraction Time (seconds) //13 Sound Type //14 Airspeed limit for retraction (KIAS) //15 Airspeed that gear gets damage at (KIAS)static_pitch = 0.1static_cg_height = 17.56tailwheel_lock = 0gear_system_type = 1max_number_of_points = 17// Gearpoint.0 = 1, 85.437, 0, -19.72, 1181.1, 0, 4.521, 65, 1, 2.5, 0.7235, 13, 14, 0, 270, 270point.1 = 1, -6.76, -20, -20.32, 1574.8, 1, 4.521, 8, 1.91, 2.5, 0.747, 13, 14, 2, 270, 270point.2 = 1, -6.76, 20, -20.32, 1574.8, 2, 4.521, 8, 1.91, 2.5, 0.747, 12.9, 13.9, 3, 270, 270// Scrapepoint.3 = 2, 30.861, -31.6723, -14.1458, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.4 = 2, 30.8612, 31.5494, -14.1458, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.5 = 2, -102, -36, 9, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0point.6 = 2, -38.4, -105, 12.5, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0point.7 = 2, -102, 36, 9, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0point.8 = 2, -38.4, 105, 12.5, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0point.9 = 2, -102, 0, 44.1266, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0point.10 = 2, -88.3844, 0, 0.0661, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.11 = 2, -57.091, 0, -6.708, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.12 = 2, -44.38, 0, -8.6234, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.13 = 2, -102.1003, 0, 3.9805, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0point.14 = 2, 50.4709, 0, 13.0267, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.15 = 2, 105.0852, 0, 0.4276, 787.4, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0point.16 = 5, 0.0, 0.0, -10.0, 1600, 0.0, 0.0, 50.0, 0.0, 0.0, 1.00, 1.0, 1.0, 0, 0.0, 0.0

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