Takeoff take much time, plane is very heavy. Engines are not strong enough to get plane up fast. (2000 hp, needs to be improved up to 3500 hp) 
Recomended speed : >160 mph.  
Use gr1+ vtol (drag up) to get up the rear chassis. Plane is on beta version, be patient.
        
Specifications
General Characteristics
- Created On Windows
 - Wingspan 63.6ft (19.4m)
 - Length 42.0ft (12.8m)
 - Height 12.9ft (3.9m)
 - Empty Weight 9,582lbs (4,346kg)
 - Loaded Weight 28,511lbs (12,932kg)
 
Performance
- Horse Power/Weight Ratio 0.14
 - Wing Loading 53.2lbs/ft2 (259.6kg/m2)
 - Wing Area 536.2ft2 (49.8m2)
 - Drag Points 8713
 
Parts
- Number of Parts 103
 - Control Surfaces 7
 - Performance Cost 569