Ahh yes...and why not?
The GVF Shu Mk V is the latest version of the Vasudan Fleet Interceptor class Starfighter. From the beginning, the Mark I was rushed into service as it's development was deemed satisfactory for the requirements at the time of Fleet introductory due to the urgent need at the time. The GVF Shu Mk. II was the end result of completing the development which the current engine configuration was the end result. The Mark II quickly replace the Mark I in front line service and most of the Mark I's were either stationed on second line ships or regulated to training roles. Due to the complex difference between the Mark I and Mark II,s None of the Mark I's were able to be upgraded to the later standard as it would cost too much.
With the Mark II's meeting the initial requirements for a fast Fleet Interceptor exceptionally well, there was still some short comings in it's design. One was the reactor power plant's, while reliable, was high on maintenance due to it's
compact design and high power output to weight ratio. Second was the weakness in the area where the outer left and right engines meet the top frame. Under extreme hard maneuvering for a prolonged period, the wear and tear in this area caused cracks and resulted in some accidents and operational losses until it was discovered and reinforcement plates were installed to correct this weakness.
The designer of the GVF Shu went back and while keeping the overall shape, actually nearly redesigned the main hull to once and for all correct the past problems and also leave room for future expansion and upgrades. The Mark III and Mark IV were the development versions and none saw actual front line service as too few were made. The Mark III's was primarily the power plant development vehicles while the Mark IV's were the hull advancement, power plant integration and computer advancement ships. A total of 23 ships of both Mark III and IV's were made.
GVF Shu Mark V
With the progression of the power plant reactors, the hull maturation and computer advancements, the Mark V was the end result of this long development cycle. The hull was larger and longer than the Mark II to house the advance Power reactor and as such, the maintenance cycles were dramatically reduced. Maximum Power output was 1/3 more than the Mark II and normal sustained power output was also 1/3 more. Outer three engines were 16% more efficient in power consumption throughout the power band of the outer engines. The central engine was the most improved as it's entirely new design. Power output was increased by 11%, Power efficiency was increased by a whopping 32% over the Mark II. As with any Fleet Interceptor, speed and range are paramount and the Mark V exceeds the Mark II in this regard. Speed is up by 11%, range has increased by 17% due to the efficiency of the engine power draw being less than the Mark II.
Well, that's what I got off the top of my head while developing the GVF Shu Mark V.
The GVF Khepri Mark II is what I would call a heavy fighter/bomber type. As you can see, it's quite large, has a long range and can carry quite a bit of a payload. Consider it like you would the GTF Hercules series.
It's late and I'll complete this tomorrow. My apologies.