I understand the cost verses capability implications in regard to a single fleet of aircraft, but we have traditionally have had different types in service at the one time so it is not unheard of to have separate pilot and maintenance streams.
In the past we have operated together,
F/A18A 1985=present/F111 1973=2010
English Electric Canberra 1951=1982/Mirage lll 1964=1988, A4 Skyhawk 1967=1984(RAN), F/A18A
Avro Lincoln 1946=1961/English Electric Canberra 1951/1982,
and the list goes on this is in the past 40 years or so
You are correct when you say if the legacy Hornets are grounded we have no tactical fighter coverage, but i believe it we should have a fall back position with two different airframes so we are not left in a vulnerable position.
I am not a pilot, so if any current fighter/bomber pilots on the forum please give us an insight is it better to have two engines or a single engine what is the preferred choice if it was up to them?
But all these capabilities you refer to ARE different. The F/A-18A/B is our tactical fighter. The F-111 is a pure striker with limited to no air to air capability.
If the F/A-18A/B fleet is grounded we have no effective air defence capability. Sure, we could do some point defence with F-111 and Hawk, but against a serious air threat, we will be vulnerable. But if a major grounding occurs on whatever combination of aircraft we operate, we will be in serious trouble.
As to the dual types, we have NEVER had a dual A2A/strike capability with 2 separate fleets of multi-role fighters before and we only will with the Super Hornet because of the delays to the JSF.
If it had been on time we would be operating F/A-18A/B by itself providing ALL air to air and strike capability until JSF came on line.
As can plainly be seen by Air Force's plans, they are not concerned about a potential loss of capability with operating a sole air combat aircraft type, nor with operating a sole aircraft type with a single engine. Are they the experts in these matters, or not?
I do not see it an effective use of scarce defence funds to continue to operate a second-class air combat capabIility, when we COULD operate a first class capability across the entire force. The only argument against it, is a scare tactic that a single engine might fail, resulting in the loss of an aircraft. There is absolutely no evidence to back up the "dangerous" aircraft argument, other than the extremely simplistic "what if". Well what if both fleets are grounded? What do we do THEN? Buy a third type? Where does it end?
A casual glance at the flight and engine testing conducted to date, has shown no such evidence that the F135 is likely to be an unreliable engine. Yes birdstrikes, FOD etc can occur and are completely independent of the aircraft type, but such issues effect twin engined fighters too.
I don't mean to belittle your argument, but the Super is PURELY a bridging aircraft. It should NOT remain in RAAF service beyond 2025, purely on a capability basis and according to the current Chief of Air Force, it will not be... Unless something superior to the F-35 is available, then we should stick with a sole F-35 based air combat force.
Perhaps UCAV's might be a viable prospect for the 3rd batch of AIR-6000 fighters and we'll see a dual tactical fighter force. That will be the only way it will happen though, unless Defence loses all sway over the Government with respect to air power issues...