Do you actually think something like the RQ-180 is comparable to a B2 or B21? If you start extrapolating the development of drones to manned aircraft, there is no limit to the amount of absurd equivalencies you could draw.
well depends on what we are talking about here. What do you need to have access to have huge 55m long lightweight wings that can store a lot of fuel?
You cannot build a 52m long flywing bomber or UCAV if you don't have tech to keep the weight down on that. That's just a reality. Otherwise, the larger your wing gets, the heavier your aircraft is and 2 engines become not enough.
RQ-180 has lower requirement than WZ-X. 40m wing vs 52m wing. And if you look at the long end of wing. it goes without "body" for longer than B-2 so the structure and material has to be extremely light and strong to tolerate the force/load against it while also carry significant amount of fuel to allow for the longer range and radar antenna to be installed. So level of material science will also enable H-20 to be built to certain size with certain range and payload.
It'll be difficult though, 5000km range hypersonic cruise missile is still going to be extremely long and heavy(Probably as large as the DF-21D). You'll also need a large booster stage to boost the missile to the speeds required to ignite its scramjet. B-2 sized flying wing is nowhere near large enough for internal carriage of such weapons, which IMO means H-20 would take on a more exotic design. But H-20 is meant to make its debut in less than 18 months so I guess we'll see if XAC disappoints or not.
H-20 project keeps getting pushed back. I think J-36 really changed the requirement for H-20. If you already have a 6th gen aircraft with full 2IC range, then your strategic bomber needs to push for higher requirement. I have no idea what their requirements are, but CONUS is a reasonable path to take. So, then the question is how far can you push H-20's range and payload so that it can say hit Seattle or San Diego?
Well, that's all big in-service airplane experience China currently has. When it comes to flying wings, there are only relatively smaller drones, where in-flight balance issues for example don't even come up. Wz-x is a new, just unveiled development. It's not in service.
This is why H-20 will be so important in the first place, it and the C929. Last big bastion of a/c design China hasn't shown yet are big, long range aircraft.
Those aren't magic. They aren't simple either, prone to delays and cost overruns. Ultimately, even in the US, counting planes reaching prototype stage, failure rate for multi-engine strategic bomber development programs is over 30%. Soviets had something similar.
I think it's important to separate fly wing designs with just large passenger planes.
They've had experience now with GJ-11 for quite a while, so WZ-X isn't exactly new. But clearly, it's a far more ambitious product.
I use WZ-X as an example to point out the improvement that had to be made vs 10 years ago for them to just produce a prototype like this out of blue.
That's for sure, B-2 is a 35 year old design. But that's combat, avionics and stealth. I don't see how *Aircraft* difficulty part changed since then. If anything, B-2 can be more ambitious than B-21 in this case, as it's both hi- and lo- aircraft, not a glorified powered kite.
So, I think we can agree that new aircraft project that are ambitious should generally be considered difficult.
I just have a problem with B-2 to be considered an ambitious design using today's technology.
Goal for H-20 has to be more ambitious than B-2. And I would say its range and payload + EW/power requirement has to be a lot higher than B-21. When you have 4 engines instead of 2, all your requirements better go up.
If it does have supersonic speed, what is stopping h-20 from also carrying BVR missiles like PL-17 and also carry a big radar. That way they can self escort. Essentially an even bigger version of J-36, launching AA missiles, carrying big radar, acting as an AWACS, directing drones. The only thing it will lack is maneuverability, but that can be mitigated by staying far behind. Essentially a huge missile truck. Such a platform will be very useful.
Absolutely nothing. In fact, H-20 should be able to carry PL-17. After all, B-21 can carry AAMs also,