Speaking of which - I believe I may have messed up regarding the B-21's main IWB dimensions? The B-21's main IWB is not ~6 meters long, but actually ranging from ~7.2 meters to ~8.5 meters long (per Binkov and SPF)?
And given that the B-21 is expected to be able to carry the GBU-57 MOP bomb (which is ~6.2 meters long) - There likely are merits to the longer length of said IWB than what I measured sometime ago. In other words - The B-21's overall length (of ~16.5 meters) is roughly about 2 times (if 8.5 meters) that of its main IWB.
Going back to the WH-X (let's call it that way from now on) - Judging by the approximate location of the two unknown engines (which should be located along the centerline of the aircraft) - That could mean there are two IWBs lined along on the outboard of the two engines on either side.
| Min (taking overall length = ~22 meters) | Max (taking overall length = ~24 meters) |
Overall length is 3x IWB length | ~7.3 meters | ~8.0 meters |
Overall length is 2.5x IWB length | ~8.8 meters | ~9.6 meters |
I refrained from taking the "overall length is 2x IWB length" point into account for the time being, considering the approximate location of the two IWBs on the WH-X, especially when compared to the B-21 and B-2 (both of which have their IWBs lined along the centerline of their airframes, which would be the longest segments of their respective airframes).
But of course, if the satellite imagery is actually deceiving (i.e. that the IWB(s) on the WH-X is actually located along the centerline and the two engines are lined on the outside of the IWB(s), also per Binkov's illustration), then the IWB(s) would be somewhat longer than what is being listed above. As such, ~10 meters of IWB length is not out of the question.
@Blitzo what do you think?