NWS centering bug

[bbrz]

-

Edited April 8, 2018 by bbrz

[metzger]

The NWS is still driving me crazy during taxiing as it has a bug in the way it centers.

 

When you release the steering button the nosegear stays at the present deflection angle, which leads to some interesting maneuvers if the nosewheel isn't 100% straight before releasing the button.

 

The -1 says:

1. With the NWS button released viscous shimmy damping is provided.

2. During taxiing, if the route permits, temporarily release the NWS button to allow an operational check if the shimmy damper works. (turn the nosewheel a tad, release the button and check if the nosewheel returns to the center position)

3. NWS should not be used above 65kts during takeoff.

 

As the shimmy damper helps to center the nosewheel, the nosewheel should automatically return to the center position if the button is released.

If it wouldn't, releasing the button during takeoff at e.g. 60kts would be real gambling!

 

+1

[CoBlue]

+1000

[WildBillKelsoe]

Shimmy Carter agrees!

[Hamilton]

The NWS is still driving me crazy during taxiing as it has a bug in the way it centers.

 

+10000

[Reflected]

Isn't the nose wheel supposed to stay where you release the button? I thought the real F5E worked that way. I might be wrong though.

[belsimtek]

Where have you got this info from?

 

 

edit: Just got the replies from an ex T-38 pilot and an ex T-38 IP. Both said that the nosewheel centers when you release the steering button on the T-38 and on the F-5. If it wouldn't, it would be unsafe and highly unusual.

 

 

I really hope the BST is going to fix this!

 

Agreed, adding it to the watchlist. Thank you for report and chasing real pilots for clarification.

[DaveRindner]

Thank goodness BST acknowledges issue. The faster it is fixed the better.

[Balzarog]

I've found the best way is to use the NWS during taxi only. When you enter the runway, you can center the nose wheel by either taxiing fwd SLOWLY with the NWS, or by using your toe brakes. Hold full toe brakes and advance your throttles to about 90%, release the brakes, and when you are rolling, go burner. DON'T TOUCH YOUR NWS BUTTON! Tap your toe brakes to stay centered until you get rudder authority. This is how I've always taken off, and I've never had a problem.

 

Good job bbrz! I never even noticed the nose wheel shimmy damper not working.

Edited December 21, 2017 by Balzarog

[Bulldog_1]

The F-5E NLG (and pretty much all fighter aircraft NLG) have a caster built into it like a shopping cart, and like a shopping cart, the wheel centers when there is forward motion unless an external force is acting on it (activated NWS w\rudder input). Does that make sense?

[DaveRindner]

There is still a serious problem in how the aircraft handles during landing run. I am unable to stop from spinning, if I land without drag chute. I am not locking the wheels. At 90-70 the aircraft control is lost, it turns on its own to one direction or other and slides sideways. This is definitely a problem, and a serious issue on Belsimtek's part. Either the breaks are weird, or weight on wheels is wrong, or friction coeffcients are off. Whatever the problem, the issue is in both 1.5.8 and 2.2.0.

[Svend_Dellepude]

There is still a serious problem in how the aircraft handles during landing run. I am unable to stop from spinning, if I land without drag chute. I am not locking the wheels. At 90-70 the aircraft control is lost, it turns on its own to one direction or other and slides sideways. This is definitely a problem, and a serious issue on Belsimtek's part. Either the breaks are weird, or weight on wheels is wrong, or friction coeffcients are off. Whatever the problem, the issue is in both 1.5.8 and 2.2.0.

 

You should provide a track of the issue.

I have never had such an issue.

Have you doublechecked your axis control assignments, and also checked your inputs (R_CTRL + ENTER) to confirm that nothing weird is going on that nothing weird is going on with your input controllers?

[DaveRindner]

My controls work fine. It is a problem with F-5E module itself. An aircraft cannot slide sideways for half a click without gear collapse. F-5E does do that. It is a stupid problem in the module, and I am patiently waiting for BST to fix it. From time to time, I like to remind them, becouse after so many updates, the issue remains.

[DaveRindner]

I don't beleive I am the only one. Others have described issue with enough similarity , that the same problem is being described. Other issue is that the module lacks anti-skid system simulation, and gear locks up fairly low on wheel break pressure.

[Svend_Dellepude]

I don't beleive I am the only one. Others have described issue with enough similarity , that the same problem is being described. Other issue is that the module lacks anti-skid system simulation, and gear locks up fairly low on wheel break pressure.

 

You should provide a track and some data of how it works IRL if you want anybody to fix it.

[docWilly]

I don't beleive I am the only one. Others have described issue with enough similarity , that the same problem is being described. Other issue is that the module lacks anti-skid system simulation, and gear locks up fairly low on wheel break pressure.

 

Dave,

question: do you use your rudder device for braking (i.e. toe-tip-braking)? If so please delete the "braking" entry for your rudder device (just for a test) and try to use either your keyboard command for brakes (all brakes not separated left/right) or bind this to a button on your stick. I did so and really have no issue with the F5 nor a cryptic NWS-steering bug etc. Sliding only appears if I treat her bad - and I agree that the noseweheel should have some damage in a severe sideslip on the concrete - at least blown tires or whatever you like.

 

My rudder device is a little buggy after some years and I have no chance to recalibrate becuase it´s a harware issue, so I do not use toe.tip braking in DCS anymore but with a button assigned to the command. Really easy.

Edited January 21, 2018 by docWilly

[dimitrischal]

I don't beleive I am the only one. Others have described issue with enough similarity , that the same problem is being described. Other issue is that the module lacks anti-skid system simulation, and gear locks up fairly low on wheel break pressure.

 

You have started numerous threads and posted complains on others about this issue.

Although the f5 isn’t easy in high speed ground handling it doesn’t appear bugged. Loads of people have been landing normally without the issues you are having without using the parachute on relatively short runways.

So the normal assumption is you have a problem somewhere and continuously complaining about it doesn’t make it a bug.

My impression is the default curve settings are a bit sensitive on the f5 in general. Maybe look there?

[dolfo]

Was away for some time, happy to see that this seems to be fixed.

 

Thanks.

[Dav IRL]

The NWS always felt very difficult for some reason.