What can I do to correct diagonal steering?

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What can I do to correct diagonal steering?

Postby stephan » Sat Dec 01, 2012 10:59 pm

I have FS9.I love Camsim AC.Downloaded their Biz jet and noticed that when I taxied to the runway,as I rounded corners,the craft 'slid around the corner as if on ice,rather than an acurate front gear steering.I looked at the contact points from the Camsim Phenom 300 as an example,but couldnt get anywhere with it.Not asking for a detailed repair answer (tho it would be nice).Just need to know what line to work on,or where to start.Thanx a bunch for any help. :)
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Re: What can I do to correct diagonal steering?

Postby garryrussell » Mon Dec 03, 2012 12:27 pm

Do you mean you don't see the wheel steering.

You'd have to see it live as the steering animation doesn't show on playback...is this on playback you're looking at it?
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Re: What can I do to correct diagonal steering?

Postby Hagar » Tue Dec 04, 2012 2:31 pm

Hi Stephan. There are a lot of CamSim aircraft posted on Simviation alone. If you can be more specific someone can check this out for you. Which aircraft have you tried & what controller/joystick do you use? File name or the description & a link to the page the file is posted on would be a great help.

I've tried this one in FS9 & not noticed anything wrong with the ground handling. http://simviation.com/1/search?submit=1 ... ategoryId=
Last edited by Hagar on Tue Dec 04, 2012 2:35 pm, edited 1 time in total.
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Re: What can I do to correct diagonal steering?

Postby Hagar » Tue Dec 04, 2012 5:13 pm

OK. I see what you mean. It looks to me that the main wheels are set too far back. This can be tweaked in the contact points section of Aircraft.cfg.

Its a long time since I messed around with this stuff so perhaps someone more qualified than me can fix it for you.
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Re: What can I do to correct diagonal steering?

Postby Hagar » Tue Dec 04, 2012 6:23 pm

This should get you started. The entries I've marked in red are the main gear fore/aft position in feet. I've also tweaked some variables for the nose gear including the steering angle in blue.

[contact_points]

point.0 = 1, 18, 0, -8.26, 1181.1, 0, 1, 45, 0.3, 2.5, 0.82, 15, 15, 0, 0, 0
point.1 = 1, -3.75, -6, -8.393, 1574.8, 1, 1.167, 0, 0.3, 2.5, 0.45, 15, 15, 2, 0, 0
point.2 = 1, -3.75, 6, -8.393, 1574.8, 2, 1.167, 0, 0.3, 2.5, 0.45, 15, 15, 3, 0, 0
point.3 = 2, -13.6786, -30.0386, -2.2788, 787, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0
point.4 = 2, -13.6786, 30.0386, -2.2788, 787, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0
point.5 = 2, -24.5552, 0, -3.5983, 787, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0
point.6 = 2, 24.8796, 0, -4.0198, 787, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0
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Re: What can I do to correct diagonal steering?

Postby Hagar » Wed Dec 05, 2012 4:04 am

That's disappointing. I set those contact points accurately with a utility named ACM. My tweaks might not be perfect but if you'd used the complete contact points section from my last reply (copy & paste into Aircraft.cfg) you should have noticed a big difference in the ground handling.

Maybe if I can get to understand what each line represents,(this problem craft had 6 or 7 lines),and what each figure in each line means in laymans terms...(like 'what the devil is a scrape?')

Points 0, 1 & 2 are the nose, left & right gear respectively.

Points 3, 4, 5 & 6 are Scrape points. These are the points like wing-tips where the airframe would touch the ground if it tips over.

There is a brief explanation of the different variables above the contact points section in all default Aircraft.cfg files.
Last edited by Hagar on Wed Dec 05, 2012 4:23 am, edited 1 time in total.
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Re: What can I do to correct diagonal steering?

Postby Hagar » Wed Dec 05, 2012 1:14 pm

If you do these tweaks while FS is running please remember to select another aircraft after editing is complete. Let it load then select the one you're working on. I find it just as quick to quit FS9 & restart it.
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