- Folding head and tail which in turn means different main rotor blades. Different rotor head.
- All new fly-by-wire flight control systems. The aircraft subsequently have different handling and flight envelopes that requires a significant amount of certification.
The Sikorsky solution was a developmental platform in a competition that was supposed to be 'off-the-shelf'.
Well, almost everything you listed would be things that would have to be done to upgrade any COTS aircraft to a Military one. Including the folding head and tail.
However, the complete upgrade to fly-by-wire is not necessarily something that would have to be done if the avionics of the commercial system and its flight controls were adequate. Understanding that decision and what all went into it would be an important part of consideration.
If the Canadian Program Team felt that the requirements to change the COTS aircraft to a Navalized one were either too expensive, would represent too massive a change, or unacceptably lengthen the schedule, then the principle responsibility was theirs to evaluate the submittal versus what the existing aircraft can do and question the supplier, or come to a determination that it was not doable within the constraints of the requirements document.
It sounds like there is a mixture between the two following fundamental issues:
1) The S-92 as a commercial aircraft was not a good fit to the requirements for the Canadian Naval requirements and was going to require too many revisions, and that some of those revisions were not going to fit into the cost or time scheduled desired by Canada. This can only occur because for three reasons:
a - The Program Management team was not savvy enough, or experienced enough to recognize the mismatch
b - Sikorsky oversold their capabilities to cost effectively make the changes and meet the schedule.
c - The desired changes pushed the envelope too much and they were unprepared for the necessary changes.
(My guess is that it is a healthy mixture of all three)
2) There was either favoritism or not enough knowledge on the part of the governmental team evaluating this regarding the review of the bids and the decisions regarding them.
My experience has shown that in the end, these issues are rarely completely one sided. Usually, both sides have a price to pay either to make the contract work...or to back out of it. If they end up backing out of it, Sikorsky may hurt over it...but so will the Canadian government, and by extension the Canadian people.
In the end, some program management and perhaps higher placed people on both sides may lose their jobs, and both sides will probably lose money if they back out. If they desire to find a way to proceed, then they have to balance off the extra cost and slippage in schedule against the life of the contract and determine which of those two options is the least cost and impact, both financially, militarily...and also politically is my guess.
In the overall scheme of things as far as military contracts for Sikorsky go, this is not a show stopper for them, and they have plenty of business to move forward from this. In the end, so will Canaad (move forward) once the people make their displeasure known if it has impact on the vote.