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 10 Main landing gear a wee bit above ground (Read 7174 times)
Chris the Swiss
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Main landing gear a wee bit above ground
May 6th, 2012 at 7:31pm
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It seems to me that the main landing gear is a wee bit above ground. From the exterior view, you can't see the impact on the gear upon touch-down. Front gear yes, but not the main landing gear, which is strange since the impact should show. (And I'm sure it would since this simulation is among the best.) Also on the ground it seems to me that the rear of the plane in relation to the front could be a bit lower. Does anyone know how to change the contact points? Thanks for your help.
  
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Markoz
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Re: Main landing gear a wee bit above ground
Reply #1 - May 7th, 2012 at 2:11am
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Strange. I just checked the landing gear on the 737-200 and I can't see all of the tires because they are slightly beneath the surface. They look flat on the bottom of them.
  

Mark Fletcher



PC: i7 10700K @3.8/5.1GHz | 64GB DDR4 3200 | 12GB RTX 4070 Super | 32" LCD Monitor | 1TB SSD & 2x2TB SSD | Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020
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marvic
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Re: Main landing gear a wee bit above ground
Reply #2 - May 7th, 2012 at 2:39am
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I checked too using both stock and payware airports and different field elevations, mine sits as it should firmly on the ground.
  

Cheers, Mark Win7 64bit, i5 2500K 4.2Ghz, Gigabit Z68X-UD4-BE, GSkill 12800 DDR3 8gig ram, GTX960,WD 2t, 250gb SSD, P3Dv3, GSX, REX E. EZDok, Accu-Feel, ORBX,Track IR5, Saitek PRO; Yoke, pedals, Xtra throttles & headset
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NaMcO
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Re: Main landing gear a wee bit above ground
Reply #3 - May 7th, 2012 at 8:24am
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Same, mine seem good   Huh
  
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Chris the Swiss
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Re: Main landing gear a wee bit above ground
Reply #4 - May 7th, 2012 at 9:33pm
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Here's a screenshot. Touch down, main landing gear should be on the runway.



What can I do to solve this problem?
  

DSC00504.JPG (Attachment deleted)
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Kalai
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Re: Main landing gear a wee bit above ground
Reply #5 - May 7th, 2012 at 11:23pm
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Iʻve noticed that weight is a factor. try adding weight to the max and see what it looks like then subtract and compare
  


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cameronmd80
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Re: Main landing gear a wee bit above ground
Reply #6 - May 8th, 2012 at 1:17am
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http://www.youtube.com/watch?v=_YXBrGlSNZs

The effect is clearly appearant in this video, skip to 1:30
  
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Markoz
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Re: Main landing gear a wee bit above ground
Reply #7 - May 8th, 2012 at 7:15am
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I had a look and on landing, the wheels do seem to be above the runway.

So you might want to try changing these settings in the aircraft.cfg:

[contact_points]
point.0 = 1,   30.00,   0.00, -10.20, 1600, 0, 1.00, 56.00, 0.1, 0.9, 0.9, 4.0, 4.0, 0, 220.0, 250.0
point.1 = 1,  -11.00,  -9.38, -12.50, 1600, 1, 1.70,  0.00, 1.5, 1.4, 0.9, 6.9, 6.9, 2, 220.0, 250.0
point.2 = 1,  -11.00,   9.38, -12.50, 1600, 2, 1.70,  0.00, 1.5, 1.4, 0.9, 7.1, 7.1, 3, 220.0, 250.0

By reducing those three, the aircraft might look like the wheels are touching the ground when it lands.

Note: point.0 = nose wheel, point.1 = left wheel and point.2 = right wheel

Mark
  

Mark Fletcher



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Chris the Swiss
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Re: Main landing gear a wee bit above ground
Reply #8 - May 8th, 2012 at 8:33pm
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Thanks a lot. In my case, I'm going to try points 1 and 2 since the nose wheel is on the ground. Hope it works.
  
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Chris the Swiss
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Re: Main landing gear a wee bit above ground
Reply #9 - May 8th, 2012 at 9:04pm
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I've just made a very interesting observation:

If the tanks are full: Tires are really solid (even a bit flat) on the ground
If the tanks are empty: Tires are a bit above ground

In both situations, the total payload was 8749 kg according to ACE.

When I did that landing (see pic above) the amount of fuel was close to the minimum; therefore tires were a bit above ground level.

However, they should always be on the ground. Consequence: some tweaking is necessary.
And this also may show that the number of passengers and amount of cargo are not reflected in terms of strain on the tires/landing gear.

Can you confirm this, Mark?
  
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Chris the Swiss
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Re: Main landing gear a wee bit above ground
Reply #10 - May 8th, 2012 at 9:47pm
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I've done a little tweaking with the 737-200 (base model)
In my humble opinion, 11.9 for contact points 1 and 2 (main landing gear) is the best compromise. With 0 fuel (which is not a realistic amount) the tires still seem a bit above ground, but with 20% in each tank it starts to look good. The plane doesn't stick its rear into the air any longer which I think looks much more realistic. The tires are a bit flat with 90% fuel, but hey, that's the compromise. I mostly need between 30 and 60% for shorthaul flights.
What do you think?
  
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Markoz
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Re: Main landing gear a wee bit above ground
Reply #11 - May 9th, 2012 at 7:08am
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My setup is that my 737-200 has the max passengers, max cargo and 100% fuel, so that the total weight of the aircraft is no more that 100lbs above the max. This info is all according to the FSX Fuel and Payload page. So my settings are:

Captain                        180
First Officer                   180
116 x Passengers       20880
10 Cargo                     2950
Total                         24190

EW                            59800
Payload                     24190
ZFW                          83990

Add fuel                     32026
GW                           116016

So I am over the MTOW by 16 pounds, but that will be burned off by both the APU and the taxiing.

The only change to this that I make, is to lessen the fuel for the shorter flights. I love a full plane! Roll Eyes

I'll give the 11.9 numbers a go and I'll let you know what I think. Wink

Mark
  

Mark Fletcher



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Chris the Swiss
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Re: Main landing gear a wee bit above ground
Reply #12 - May 11th, 2012 at 1:22pm
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Have you already had the chance to try it out? What do you think about my assumption, that the payload (passengers and cargo) doesn't make a visual difference regarding the weight on the wheels. Only the fuel load matters. Am I right or have you got different results?
Looking forward to your answer.
Chris
  
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Markoz
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Re: Main landing gear a wee bit above ground
Reply #13 - May 11th, 2012 at 3:44pm
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11.9 Looks pretty good to be honest. At a very low weight, my 737 looked like the tires were on the ground on landing. Wink
  

Mark Fletcher



PC: i7 10700K @3.8/5.1GHz | 64GB DDR4 3200 | 12GB RTX 4070 Super | 32" LCD Monitor | 1TB SSD & 2x2TB SSD | Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020
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