Box Flyer 3D8 "Wide Load"
by evader
uploaded 2017-08-04
(updated 2017-08-09)
stock spaceplane
#Mk3 #SSTO #miner #mining #rover


Tired of lifting the same old orange tank into orbit? This lift body craft fits the big wheelie mining rover in a custom cargo bay.
-space vacuum proof rating not guaranteed
-lift body for show only & produces no actual lift (but does produce drag)
-landing not tested
-was built with advanced tweakables enabled

In trying to send a XL3 wheeled heavy rover for no practical purpose, scientists found that, rather than adding ever larger engines, smaller ones with more fuel weight provided the breakthrough needed to reach orbit. What finer method to achieve this than doing it the hard way and building a huge, boxy SSTO with horrible aerodynamics?

Unlike clam shell or fairing designs for oversized cargo, it’s fully re-usable and its payload remains enclosed through atmospheric re-entry so delicate equipment can survive. It’s truly a flying hangar bay.

A stock aircraft called Box Flyer 3D8 Wide Load. Built with 256 of the finest parts, its root part is mk3Cockpit.Shuttle.

Built in the SPH in KSP version 1.3.0.

Reaches orbit maybe once every 50 tries. Features garbage truck style rear cargo bay doors. Contains internal mining, narrow band mineral and surface scanners. Requires a very specific ascent profile to reach orbit.

Launch procedure:
1. when reach around 150 m/s on runway press action group 1 to turn off top row of engines & pull up hard while leaving enough space for bottom engines not to scape the ground
2. keep pulling back hard until pitch nose completely up (if speed falls under 100 m/s press action group 1 again but keep pulling back but not if going horizontally faster than 250 m/s or craft will disintegrate) then ensure all engines are turned on
3. keep going up vertically like a rocket until about 12km
4. pitch nose down by 45 degrees
5. around 30km pitch nose so it’s exactly level with horizon
6. when periapsis reaches about 80km, throttle down to smallest rate possible above 0
7. set waypoint then set navball to waypoint to circularize, maintaining minimum throttle until above 60km to prevent loss of control
8. turn off engines at 60km until waypoint reached
9. when reach waypoint, throttle to full speed

Rover undocking (tested on Kerbin only):
1. press brakes
2. press action group 3 to undock doors
3. press ] to switch to 1st door
4. press w or up to swing door upwards (but not hard or it will blow up)
5. press ] again to switch to 2nd door
6. repeat step 4
7. press 5 to kneel spaceplane backwards (will have to press twice the 1st time)
8. press brakes again
9. press 4 to undock rover (ensure that it’s crewed before doing this)
10. press brakes again
11. press s or down to reverse rover with momentum out of cargo bay
12. to get back in, need minimum 6 m/s momentum to get up gargo bay ramp (if gets stuck, try to push it inside using cargo bay doors but not hard enough to break them)
13. if successfully docked, press action group 5 to extend rear landing gear back down (if not, put breaks on rover then do this step and then try docking once its standing on level surface)
14. press 5 again to kneel spaceplane back down (required to close doors)
15. swing doors back down but not hard
16. keep pushing door towards small docking port (scrapping the ground with the door is required to keep it in correct height to be level with docking port) until it docks
17. repeat step 15 for other door
18. press 5 again to get back up from kneeling position
19. release brakes and align nose so it’s straight with runway (will now be ready to take off but doors will likely be crooked which will affect aerodynamics so it’s not recommended to open cargo bay until you reach your destination)


  • Type: SPH
  • Class: spaceplane
  • Part Count: 256
  • Pure Stock
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