Just a random idea. As usual. 
Interceptor Frame Shift Drive
The Interceptor Frame Shift Drive (iFSD), is for all intents and purposes, the same as a normal FSD, the main difference being, the iFSD is tuned for a large improvement to acceleration, deceleration and agility, while sacrificing hyperspace jump range.
The rating on an iFSDs mostly effects it's speed and agility in supercruise, but does effect the range somewhat.
For example, a 5A iFSD would have a similar jump range to a 5C standard FSD, but a 5E iFSD would actually only be slightly worse than a 5E standard FSD. But the iFSD would use more fuel per jump than the equivalent standard FSD.
An 5E iFSD would be faster and more agile than a 5A standard FSD, and a 5A iFSD would be significantly faster and more agile than a 5E iFSD.
iFSDs are designed for in-system use, and are not particularly fuel efficient for hyperspace jumps, but will allow the user to travel around inside a system much faster than normal.
These are mostly used by security and military forces to allow more rapid response.
Thoughts?
CMDR Cosmic Spacehead
Interceptor Frame Shift Drive
The Interceptor Frame Shift Drive (iFSD), is for all intents and purposes, the same as a normal FSD, the main difference being, the iFSD is tuned for a large improvement to acceleration, deceleration and agility, while sacrificing hyperspace jump range.
The rating on an iFSDs mostly effects it's speed and agility in supercruise, but does effect the range somewhat.
For example, a 5A iFSD would have a similar jump range to a 5C standard FSD, but a 5E iFSD would actually only be slightly worse than a 5E standard FSD. But the iFSD would use more fuel per jump than the equivalent standard FSD.
An 5E iFSD would be faster and more agile than a 5A standard FSD, and a 5A iFSD would be significantly faster and more agile than a 5E iFSD.
iFSDs are designed for in-system use, and are not particularly fuel efficient for hyperspace jumps, but will allow the user to travel around inside a system much faster than normal.
These are mostly used by security and military forces to allow more rapid response.
Thoughts?
CMDR Cosmic Spacehead