Could you give me a bit more information? Did you turn the engine on? What about it isn't working? Did you raise the throttle after starting it? Does the turning work? What is the exact weight? What vtol or fighter engines did you try using? Are there any errors in console?

Here are the tutorial videos to make sure you didn't miss a step.
https://www.youtube.com/watch?v=QdGZSNTawbQ
https://www.youtube.com/watch?v=ulyQiH6rS8Q

1.Did you turn the engine on?
Yes

2.What about it isn't working
It looks like it doesn't connecting to Fighter Engine that i need

3.Did you raise the throttle after starting it?
Yes it didn't worked i seen it on debuger tool

4. Does the turning work?
No

5. What is the exact weight?
With reactor: 86.84 t
Without reactor: 71.84 t

6. What vtol or fighter engines did you try using?
I tried using vtol and fighter engine it didn't worked

7.Are there any errors in console?
No

Fighter weight limit is 50 tons, VTOL weight limit is 30 tons. Have you raised the weight limit multiplier up enough to account for this?

Yes

Could you check the fighter engine in the wire debugger tool and tell me what is wired to what?

dak_fighter (233) -
IN:
Forward:0.000
Reverse:0.000
PitchUp:0.000
PitchDown:0.000
YawLeft:0.000
YawRight:0.000
Level:0.000
Activate:1.000
RightWingHitbox:Entity[237][dak_hitboxcontroller]
LeftWingHitbox:Entity[184][dak_hitboxcontroller]
BodyWingHitbox:Entity[188][dak_hitboxcontroller]

Do those hitbox controllers have props in them currently or are they still empty?

They have props

I've gone through everything I can think of, would you mind joining the DakTek Proving Grounds server ( 73.216.100.235:27016 ) at some point so that I can take a look at the contraption directly to attempt to find the issue?