And how much will those 6th Gen aircraft cost in comparison to the F-35? There are projections that NGAD will be in the $300 million USD range.
NGAD is on the high end of cost. GCAP should be $200M per manned aircraft. And FCAS should be closer to $150M. But FCAS is risk accepting later EIS to improve maturation.
The key to understand with the 6th Gen is that it's a system of systems. Total system cost is not based on just the manned airframes. The USAF is thinking of 7 unmanned at $30M each for each manned aircraft at $200M. A flight of 6th Gen may cost $400M and have 1-2 humans. A flight of 5th Gen may cost $350M and have 4-5 humans.
This is a decent 20 min primer on what 2040 could look like with a mix of 4th, 5th and 6th gen platforms:
So, does that potentially mean that we get less than 88 airframes and we then have to wait 15-20yrs before get any other airframes under some yet to be defined sixth gen programme?
Different programs are at different stages. British-Japanese-Italian GCAP is aiming for a 2035 EIS. And one of the primary partners (Japan) has a hard date on that because they are extremely worried about where China will be at that date. German-Spanish-French FCAS has a different timeline. They moved up the unmanned component to 2032. And then delayed the manned component to early 2040s.
In theory, if we go with GCAP, we might not need a bridge fleet. Just accept the risk of a smaller F-35 fleet for a few years. If FCAS, then a bridge fleet might be necessary. And weirdly, the bridge fleet we buy would have to actually be retired to make room for the 6th gen. So we'd basically be buying the ~40 Rafales or Typhoons to serve about 15 years.
What's missing in this discussion? Understanding about UCAVs. So much of the public discussion and even discussion on this sub is exclusively focused on manned jets, when all the developments are clearly moving away from that. Our biggest gap is not actually manned fighters. It's the lack of experience in larger drone systems and a real lack of knowledge and experience with CCAs (autonomous wingman). People get worked up about cutting 20-30 F-35s. But somehow seem to completely ignore that we don't have any plans for CCAs when we should be looking at fielding something like 30-50 CCAs by the mid 2030s. To me this basically the same level of ignorance as those who argue that a Gripen and Panther are substitutable. Just from the other side of the spectrum.
Ugh. Second worst option.
Win some. Lose some. Even before all this, there were serious doubts about 88 frames being tenable given cost, pilot shortage, etc. So honestly, I don't think there'd be a ton of surprises if even a Conservative government had cut back on the order. The questions here are what are the plans for a bridge fleet (if any) and how would they look at CCAs and incorporating them to build mass.