The vertical take-off and landing locomotives were finally resting after their hard day in the workshop. James the red engine had been fitted with shiny new 6S 22.2v pannier tanks. "Now I can climb the very steepest gradients!" he boasted, "Even vertical ones!" The other engines in the shed pretended not to hear. Nobody likes a smart-ass, do they?
Rear view of lower quad, skids removed for maintenance. Speed controllers (ESCs) are underslung, electricals and avionics are fitted to the underside and the batteries and motors are right way up for the safest (and in the case of the former, lie outside of the driver's safety cell).
There's a BATTERY FIRE, SEVERE DAMAGE OR SEPARATION memory drill somewhere.
I just can't remember where.