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Grumpy's Lair: "That Sinking Feeling"... continued (Read 762 times)
Jan 29th, 2010 at 1:33am

ViperPilot   Offline
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KLMO Denver, CO USA

Gender: male
Posts: 211
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Hello! I have a question regarding the Tutorial in Grumpy's Lair regarding the "sinking" wheel issue...

I've read the Tutorial in Grumpy's Lair on how to fix the sinking nosewheel issue. I tried it and was somewhat sucessful; it raised the nosewheel, but not quite enough. I presume it's a matter of tweaking the Control Point until the nosewheel shows fully. My question is this: If the Main Gear wheels are doing the same thing, which Contact Point in the aircraft.cfg controls those? I'm talking about Main Gear Wheels on a tricycle gear single engine aircraft. I have a couple of a/c that have this issue... any suggestions?

Thanks for the help...
 

[...
"I created the Little Black Book to keep myself from getting killed..."
-- Captain Elrey Borge Jeppesen

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Reply #1 - Jan 29th, 2010 at 4:19am

Hagar   Offline
Colonel
My Spitfire Girl
Costa Geriatrica

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Hi. That tute was written in the early days of FS2002 when a sinking nosewheel was a common problem with aircraft intended for FS2000. If the simple tweak I described doesn't fix the problem it gets more complicated. As I pointed out in the tute it's not a magic fix for all aircraft.

If the main gear is also affected you might need to tweak the height of the wheels (Vertical Position) in the [contact_points] section.
Check the guide in any default Aircraft.cfg for reference to the entries. (Entries remarked like this // are for information only.) The example below is copied from the default B737_400.

Note: The gear is usually defined as
point.0 = nose/tail wheel
point.1 & point.2 left & right main wheels.

//0  Class                        <0=none,1=wheel, 2=scrape, 3=float>
//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)

[contact_points]
point.0=1,  40.00,   0.00,
-8.10
, 1181.1, 0, 1.442, 55.92, 0.8, 2.5, 0.9, 4.0, 4.0, 0, 0.0, 0.0
point.1=1,  -7.75,  -8.58,
-8.68
, 1574.8, 1, 1.442,  0.00, 1.0, 2.5, 0.9, 6.9, 6.9, 2, 0.0, 0.0
point.2=1,  -7.75,   8.58,
-8.68
, 1574.8, 2, 1.442,  0.00, 1.0, 2.5, 0.9, 7.1, 7.1, 3, 0.0, 0.0

point.3=2, -14.17, -47.33,  0.00,  787.4, 0, 0.000,  0.00, 0.0, 0.0, 0.0, 0.0, 0.0, 5, 0.0, 0.0
point.4=2, -14.17,  47.33,  0.00,  787.4, 0, 0.000,  0.00, 0.0, 0.0, 0.0, 0.0, 0.0, 6, 0.0, 0.0
point.5=2, -54.00,   0.00,  2.83,  787.4, 0, 0.000,  0.00, 0.0, 0.0, 0.0, 0.0, 0.0, 9, 0.0, 0.0
point.6=2,  42.67,   0.00, -3.75,  787.4, 0, 0.000,  0.00, 0.0, 0.0, 0.0, 0.0, 0.0, 4, 0.0, 0.0

I hope this is some help. I don't claim to be an expert at FS flight dynamics.
 

...

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Reply #2 - Jan 29th, 2010 at 11:03am

ViperPilot   Offline
Colonel
KLMO Denver, CO USA

Gender: male
Posts: 211
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Hagar,

Thanks so much for the information... I really appreciate it! I know FS 2002 is 'old school' compared to X-Plane & FSX, but it works for me just fine, giving me the chance to test my abilities & entertain me on a regular basis. Now, if I could only get my keyboard assignments to save so I don't have to re-configure every time I open FS 2002, I'd be in Heaven!

Thanks again!

Alan
 

[...
"I created the Little Black Book to keep myself from getting killed..."
-- Captain Elrey Borge Jeppesen

P4 3.0 SINGLE CORE, 2GB Corsair RAM, ATI Radeon 4650 1GB, OCZ 600w PSU, Samsung 160GB HD XP SP3

Proud User of: FS8 FS9 CFS CFS2 IL2
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Reply #3 - Jan 30th, 2010 at 1:34pm

Fozzer   Offline
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An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861
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ViperPilot wrote on Jan 29th, 2010 at 11:03am:
Hagar,

Thanks so much for the information... I really appreciate it! I know FS 2002 is 'old school' compared to X-Plane & FSX, but it works for me just fine, giving me the chance to test my abilities & entertain me on a regular basis. Now, if I could only get my keyboard assignments to save so I don't have to re-configure every time I open FS 2002, I'd be in Heaven!

Thanks again!

Alan


Hello Alan...Wink...!

How about giving FS 2004 a try?... Wink...!

I hung onto FS 2002 for ages until I finally tried FS 2004, and the improvement in the Scenery, etc, in FS 2004 was worth the effort!... Smiley...!

Its now availably at a bargain price!

The demands on the computer are nowhere as drastic as FSX, and with a bit of juggling with the sliders some excellent results can be had...plus all the many add-ons for it!

My ancient Computer copes with it admirably!

Treat yourself...Give it a try.... Wink...!

Paul...G-BPLF...FS 2004....FS Navigator.... Cool...!

Many FS 2002 Objects can be used in FS 2004.
 

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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Reply #4 - Jan 31st, 2010 at 11:31am

Apex   Offline
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I love YaBB 1G - SP1!

Posts: 732
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Fozzer speaks wise words FS2002 vs FS2004.  I'm running both, FS2002 runs better on my 2003 system, but FS2004 does have an improved look to it, with the bridges upgrade flying San Fran, NY, and some others really gets cool.  That bridges upgrade is somewhere on the Microsoft site.

Hagar's help is always good, but sometimes FS2002 won't fully co-operate with landing gear.  Those nosewheel tweaks work well but sometimes not 100% as Hagar said.  So I have found.


 
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Reply #5 - Feb 1st, 2010 at 3:44am

ViperPilot   Offline
Colonel
KLMO Denver, CO USA

Gender: male
Posts: 211
*****
 
Apex,

Thanks for the reply! Hagar's fix was the one! I just had a couple of aircraft that had this difficulty, and it fixed them right off. It will come in handy as a good tutorial.

Fozzer has some great points about FS9... at some point I'll pick up a copy of it; eBay has some good deals on it right now.
For the time being though, FS8 is keeping me on my toes. It also runs pretty good on my Dell laptop; just takes a little bit to load at 1st.

Thanks for all of your help & suggestions!

Alan

Dell Inspiron 9400
Pentium M 745 1.8GHz
1 GB RAM

(It's slower than most, but does the job)
 

[...
"I created the Little Black Book to keep myself from getting killed..."
-- Captain Elrey Borge Jeppesen

P4 3.0 SINGLE CORE, 2GB Corsair RAM, ATI Radeon 4650 1GB, OCZ 600w PSU, Samsung 160GB HD XP SP3

Proud User of: FS8 FS9 CFS CFS2 IL2
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