Thanks for the design cycle insider insight. That tells me redesign and then retest. Everything I've heard is a capability far in excess of 60k FC, but it sounds like you know of reasons a redesign is required.
With the wing limiting FH and CFRP, the capability there must be 150k FH+.
Finding margin to increase MTOW is normal at this point of production. In particular for CFRP winged aircraft where reinforcements are light and trivial to add.
Again, it means they gave up optimizing the structure and thus reducing the weight.
On the other hand, it means they reduced the number of additional modifications that could slow the production process. The priority is probably to accelerate the production.
The amount of weight in a CFRP winged aircraft is trivial. You do realize all aircraft are inherently overweight as design guidelines are used. Is the A321 overweight because they have increased the MTOW?
It is impossible to exactly hit the mark. The A220 seems right on target for weight. You are talking theoretically. I am discussing real world aircraft design.
The short field performance is excellent. What the A220 needs is a hundred plus more orders an then sales momentum takes off. Prior links were of NK's (Spirit) bidding on the A220 vs. E2. In an ULCC, the 37 ton empty weight A220-300 carrying 160 pax at 105kg/pax is at 53.8 tons. Even before crew, in a ULCC configuration the tanks are empty by 1.6 tons. With crew, we are discussing 3 tons of empty fuel volume before. So this MTOW increase isn't enough. Oh, it might be, but we still have, in a Spirit configuration, empty fuel tank volume. Now, removing 7 or so passengers isn't a big deal to fly to Hawaii, but is sub optimal.
You are aware the A220-300 weighs 7.6 tons less than the A319NEO? You are worried about a trivial amount of weight. With the PW1500G thrust bump (clever, maximum thrust only after airspeed high enough for sufficient rudder) that the A220 has better hot/high than the competition? The A220-100 has LCY to itself, MRJ, and E2.
The E2-190 weighs 35 tons. Thus the lower capacity E2-195 almost certainly weighs more than the A220-300.
Efficiency is relative. The A220 focused on achieving efficiency via subsystems. Which competitor are you worried about.
This is a possitive. Possibly mostly for a stretch.
The MD-80 was over designed. Cest la vie, that means durability.
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