engine and other mechanical parts are mounted within
a monocoque carbon-fibre sustainer box which is
bolted to the fuselage around the engine bay
Wiring harnesses have connectors at the
sustainer box, and fuel lines have sealing, quick
disconnect plugs. This modular design allows for
easy access and good maintainability (allowing
servicing and overhaul off the sailplane).
The engine bay is covered by three doors. There are
two main doors on the port and starboard sides open
during deployment and then close again once the
engine has been fully deployed.
A third ‘finger
door’ sits within a U-shaped cover-plate and folds
away to make an opening into which the pylon fits
flush with the surrounding fuselage.
with a combined engine-pylon shroud, this
arrangement minimises the drag of the deployed
engine. It is estimated that the deployed engine has
less drag than an extended undercarriage.