reported Braking Bad

[=52d= Skip]

A couple of days ago I came by this thread:

 

 

and I couldn´t help but notice that some users did go to great lenghts to come up with very *creative* reasons why this issue has to be the OP´s fault. So I decided to look into it and here is what I came up with:

The Test Setup:
DCS Open Beta 2.5.6.61527

Standard DCS Day
F-16 placed at Takeoff from Runway
25% Fuel
No other Stores
GW 23550

 

Test Procedure:
- After entering the Cockpit NWS and the Control Indicator where activated and it was verified that connected controls where in neutral.
- 20 Seconds into the Mission the Throttle was moved to MIL power and the Jet allowed to accelerate; no other control inputs where made.
- Passing 90 Kts the Throttle was moved back to idle.
- - (Usually the jet kept on accelerating just over 100 Kts.)
- Speed was allowed to drop back to 100 Kts, then Wheelbrakes were activated by hitting the W key and held down for the remainder of the Test.

 

Findings:
- Full braking Power was achieved in less than 2 Seconds resulting in a complete lock of both Main Landing Gears.
- With both Wheels locked the Plane did skid in a straight line for 3 to 5 Seconds before:

- - 32 Times the left Wheel unlocked uncommanded resulting in a drift to the Right
- - 33 Times the right Wheel unlocked uncommanded resulting in a drift to the Left
- - 4 Times either the left or right Wheelbrake pressure Indicator dropped to Zero, resulting in the total loss of Braking Power and unlocking of both wheels
- - 15 Times NWS disengaged uncommanded*
- - In 65** Tests 2 times the plane did stop on the Runway

 

Conclusion:
Veering of the Plane in either direction is the direct result of the uncommanded unlocking of either the right or left Wheel.

No other cause was found.

 

Recommendation:
Given the fact that working Wheelbrakes are one of the most basic, but highly important system and that having Rudder Pedals with Toebrakes is not at all a Minimum System requirement immediate revision of the current implementation is advised.

Time to achieve full braking Power should be adjusted to 5-10 Seconds and it should be ensured that the wheels then either stay locked firmly or a working Anti Skid solution is implemented.

 

Until that time the user should be advised to not use the W key for more than 2-3 Seconds at any given time and rather use a tapping method.

 

* - Not directly related to the issue at hand it was found that the NWS disengages on it´s own at 130+ Kts (which I think is not correct).

** Of the 65 Test runs 20 where down by me, 20/ 15 by 2 of my Friends and 10 @lthronwise at 2 different Airfields. A big Thank You! for their effort.

 

 

Brake_TST.trk Brake_TST.miz

[BIGNEWY]

Hi, 

 

I have checked with the team and there is some work to complete on the antiskid. 

 

thanks for the report.