Sarah Cromwell/Inventions

Civilian
Cromwell Engine: A generator that directs the kinetic energy released by mana-crystals into a circular motion which is then used to move gears in order to power different machines. It's like an eco-friendly steam engine that recharges on its own.

Batbunny Jukebox: Using carefully calibrated air-crystals, this machine is able to replay any song stored in it on demand. It is named so cause it is usually made in the shape of a bunny with bat wings, a design used when it was first used at Lelianne Sakurazaki's and Crista Sakurazaki's wedding.

Cars, train, plains, ships and a submarine utilizing the Cromwell engine.

Cameras and sound-recording devices utilizing light and air mana-crystals respectively.

Military
Personal mana-shields: Reverse-engineered from Riko Silvian's IS shield, it is mass-produced to provide an additional layer of protection to soldiers in the field, as well as civilians working in dangerous environments. Most rely on the natural recharge-rate of the mana-crystals, but some have been custom made to be recharged with the use of the wearers dominant element.

Mana-guns: Ranging from small mana-pistols to grand mana-cannons, all work on the same principle. One or more mana-crystals are focusing their energy into directed blasts, with the amount of damage caused depending on the amount of energy projected. They can also be augmented by the use of elemental mana-crystals, but the usefulness of different crystals depends on the nature of the element.

Armored Personel Carriers and tanks: Their movement is powered by Cromwell engines to allow long term field-duty. Additionally, they possess heavy shields as well as heavy mana-rifles or cannons. The main difference between the APCs and the tanks is that tanks use heavier weapons and shields, while the APCs have large transport spaces.

Theoretical / in progress
She was requested by Riko to work on a satellite that would be positioned in orbit above Terrok. She has already designed a vacuum chamber which would use air-crystals to drain the air out of it. She would then in theory open a portal into space, and drop the satellite through it, putting it into orbit that way. The satellite itself was still being designed by the time Terrok joined the Federation, and has since been put on pause due to more advanced technologies being introduced.