Well, the history of the Australian replacement programme looks for me that way:
1st step: by around 2000, the need for new airframes arose. Australian authorities quickly identified the need for 5th generation aircraft. Since the Raptor wasn't available for exports, and most probably to expensive to aquire in the desired numbers, the decision was to go into the paper aircraft JSF.
Unfortunately, that didn't match with the remaining airframe life of your existing aircraft. So it was intended to invest roughly $3 billion into the F-18 and an unknown amount of money into the F-111 to slip into JSF timtable. You remember, nothing short of a 5th generation fighter would meet the Australien defense needs.
2nd step: completely surprisingly the programme costs rose and in service date of the yet to materialize JSF slipped.
Now the F-18 comes into play. It is of course meant only as a stop gap. But as of now, those F-18F will be bought, not leased. Resulting in a reduced JSF number. Therefore, I think the term stop gap is wrong. It will be a long term investment.
Since local air superiority has been stressed so much in the past, that somewhat surprises me. The F-18E/F really doesn't score with it's aerodynamics. Wing fences, restricted flight envelop to overcome wingflutter, aligned pylons to overcome seperation issues,... The list is long.
The things that are in favour of the F-18 for the US Navy (bring back capability, made in USA, high availability rates) are only partly of interest for Australia.
The not carrier-specific plus points could be matched or surpassed by any other 4.5 generation fighter. What remains is the availability of an AESA antenna for it's radar set, and some commonality with existing Hornets.
So, why is it on one side beyond imagination to buy something short of a 5th generation fighter (local air superiority rhetorics), and then go for the weakest 4.5 generation design as a mid-therm solution ?
1st step: by around 2000, the need for new airframes arose. Australian authorities quickly identified the need for 5th generation aircraft. Since the Raptor wasn't available for exports, and most probably to expensive to aquire in the desired numbers, the decision was to go into the paper aircraft JSF.
Unfortunately, that didn't match with the remaining airframe life of your existing aircraft. So it was intended to invest roughly $3 billion into the F-18 and an unknown amount of money into the F-111 to slip into JSF timtable. You remember, nothing short of a 5th generation fighter would meet the Australien defense needs.
2nd step: completely surprisingly the programme costs rose and in service date of the yet to materialize JSF slipped.
Now the F-18 comes into play. It is of course meant only as a stop gap. But as of now, those F-18F will be bought, not leased. Resulting in a reduced JSF number. Therefore, I think the term stop gap is wrong. It will be a long term investment.
Since local air superiority has been stressed so much in the past, that somewhat surprises me. The F-18E/F really doesn't score with it's aerodynamics. Wing fences, restricted flight envelop to overcome wingflutter, aligned pylons to overcome seperation issues,... The list is long.
The things that are in favour of the F-18 for the US Navy (bring back capability, made in USA, high availability rates) are only partly of interest for Australia.
The not carrier-specific plus points could be matched or surpassed by any other 4.5 generation fighter. What remains is the availability of an AESA antenna for it's radar set, and some commonality with existing Hornets.
So, why is it on one side beyond imagination to buy something short of a 5th generation fighter (local air superiority rhetorics), and then go for the weakest 4.5 generation design as a mid-therm solution ?