Well in all honesty when has 8 NH90s ever needed to be anywhere or 13 hueys for that matter? We could have 12, 15 or 20 NH90s but then if we can't afford to fly them or just end up lessening the allocated hours per frame to keep within budget then what are we really acheiving. The 90s are ridiculously more expensive to operate than a huey (like 3-4 to 1) but still do more than twice the work and it's not just the NH90s, we also bought some A109s that we seem to forget about.
I worked with 3 quite abit so not sure where all these seemingly concurrent taskings come from as bar a major deployment like ET popping up then was all very manageble and indeed doable as like anything in the military priority takes precedence and anything major is main effort anyway as it's not only the actual helos that have to be in those same places but everything that goes along with supporting them as well.
We may have had 13 hueys but towards the end, much like the C130s and P3Ks, that rarely means we actually "have" 13 hueys at anyone time as with any old tech a single chip light can render a aircraft U/S until the fault was rectified. Now I'm not saying more is'nt better but we also need to work within our means be it funding, manning or operational to hit that sweet spot in balance otherwise like navy we could just end up parking expensive aircraft in a just as expensive hanger sitting there gathering expensive mothballs.
IMO 8 NH90s and 3 A109s is a more if not just as capable fleet as 13 UH1Hs could ever be in terms of just sheer usefulness overall for what we most regularly do but if we keep planning on worst worst case scenarios then yes, we could have sqns on sqns for every conceivable scenario out there.
To a degree the frigates debacle is in the same boat and while I agree 2 is below minimum for numerous reasons I also remember the troubles we had crewing what little we did have in the first place so until we sort those issues, long term soloution not short term fix, then again I fear it could all be a rather pointless excercise. Not being negative just noting the overall trend and being a realist, different times come with different challenges.
There is a huge issue which is overlooked in the comments about kit quantities. If the NZDF had a requirement to be able to have eight NH90's deployed at once, then ~24 NH90's should have been ordered.
By way of example, when the RAN placed it's order for MH-60R 'Romeo' helicopters, the requirement was for 24, to provide sufficient helicopters to enable eight to be operational and/or available for operations. Using the Rule of Threes, a force of eight NH90's should be sufficient for two NH90's to be either available for, or already deployed on operations, and the potential for a deployment surge by postponing or cutting short scheduled training and/or routine maintenance which might permit increasing the available NH90 pool to a total of 4 helicopters.
On an individual basis, an NH90 helicopter is certainly more capable than an old UH-1 Huey, there is no question about that. What is at issue though is that a fleet of 13 helicopters (again, using the Rule of Threes) would have four helicopters available for or on deployments under normal circumstances/conditions, and that number could likely be surged to six or seven helicopters if need be. While the pair of NH90's still might have more lift capability than four old Hueys, that same pair of NH90's would prove totally inadequate if the NZDF required flying missions or deployments in more than two locations concurrently.
Having such a small fleet to draw from also exacerbates the negative impact of random chance. When one of the Kiwi NH90's was damaged by a lightning strike a few years ago and was out of service for a prolonged period of time, that single damaged NH90 was 12% of the NZDF's entire NH90 and rotary airlift fleet. It's absence from availability would have created a ripple effect in training and maintenance for the rest of the NH90 fleet, and impacted Defence personnel who work with the NH90's, or whom rely upon the NH90's to carry out parts of their missions.