Start from ground = aircraft stuck to ground

[Nealius]

I set up a mission with a FOB on an abandoned concrete "runway" in the Yucca Pass on NTTR, and found that the aircraft will not taxi at all, even with max power. Kinda limits the usefulness of the Harrier...

[dmatsch]

parking brake?

[Nealius]

Parking brake off, as evidenced by using max power and not getting anywhere. It's impossible to go out of idle with the parking brake on....

[Shadow_1stVFW]

Parking brake off, as evidenced by using max power and not getting anywhere. It's impossible to go out of idle with the parking brake on....

The parking brake can be set while there throttle is not at idle.

 

Try just a vertical take off clean and safe if you can actually move. I've never experienced the issue you are talking about.

 

Sent from my SM-G960U using Tapatalk

[Nealius]

I just tested: When the throttle is at idle and the parking brake is set the throttle will not move, nor will the engine RPM increase.

 

Now for the actual ground-start test:

 

1. Start hot on ground, abandoned-looking airstrip at Yucca Pass. Clean jet, 60% fuel load. QNH 29.92. Zero wind. Temp. low 20s Celsius.

2. Parking brake off, wheel brakes off, advance throttle to 100% RPM dry. No movement, however aircraft can be seen jittering around.

3. Wet VTO was achieved.

4. Attempted RVL. Encountered a lot more pitch oscillations than previous iterations of the FM. Shortly after touchdown, engage NWS at 50kts as usual, aircraft violently stops and pitches forward.

5. I somehow managed to eject with the ejection seat disarmed.

 

On concrete/tarmac I should be able to initiate taxi with a little over 40% RPM in a clean jet with full fuel. Even with a full combat load taxi is typically achieved at around 45% RPM. I thought maybe the concrete in this area wasn't registering as concrete, so I tried a ground start from a dirt road. I was able to taxi on the dirt road with about 60% RPM in a clean jet with full fuel.

 

Video and track attached. (Video may still be processing).

 

rNuw7OQ1UUE

Edited September 6, 2018 by Nealius

[SUNTSAG]

Following my tests this is not a standalone AV-8B bug and is likely to have more to do with the location on the NTTR map itself, plus a little airframe coding.

 

1. Tested with Mod ground start hot with following airframes AJS37 - F86F - M2000C - Hawk. Same results as the AV-8B.

 

2. Only airframes able to take off from that location that I own were as follows: F/A18C Lot 20 - P51D - Spitfire. (The warbirds were not a surprise).

 

3.Any ground hot start has the ejection seat active on entering the client or player slot. Which is probably why you were able to eject. So that shouldn't be a surprise nor another uncovered bug, unless you disarmed the seat in flight.

 

4. Placing an AV-8B at that location but on the road network leading up to the concrete runway everything is fine until you wonder off on to the concrete. The same applies to all the other airframes I tested that failed to take off.

 

5. IRL I understand there to be a Tarmac runway at that location so perhaps it's still WIP.

 

The concrete appears to be acting precisely as if it were rough ground instead of a smoother surface and the AV-8B has never been able to take off from sand either.

 

Is it simply coincidence that all the airframes I tested that were successfully able to take off, were ED supplied modules? I can even get the F/A18C Lot 20 to take off from sand in the NTTR map. Perhaps ED could share this secret/knowledge with both RAZBAM (AV-8B) and HeatBlur (AJS37).

 

Of course the AV-8B should be able to take off from that location but so should many others. Plus ED could add the ground start and ground start hot option to other airframes at the same time......just a thought. Cheers.

[Nealius]

Huh, that's interesting. And slightly disappointing after having spent so much time making a busy FOB there.

 

As for the ejection seat, I disarmed it after engine shutdown, right around the 6:30 mark in the video.