9Patch wrote:JayinKitsap wrote:
CFRP barrels of different shape or diameter now only require a different mandrel, the bots can deal with a wide range of sizes. A design freedom with cool possibilities.
But can you spin and autoclave 60 CRFP barrels per month?
I recall reading somewhere that CRFP that will cure without being baked in an autoclave is a possibility.
MC-21 is the launch airframe for non-autoclaved CFRP.
https://www.compositesworld.com/article ... tes-future
From that link: "The two biggest challenges, particularly in relation to aerospace manufacture, are consistent fiber wet-out and porosity, the latter of which must be less than 2% to meet OEM strength and stiffness requirements."
The downside of autoclaves is the cost to reach mass production. There ceases to be an economy of scale for that one process as the cost per autoclave doesn't drop after putting in 4 to 6.
There is a learning curve on manufacturing tolerances. If Boeing tried to mass produce a new CFRP wing at the levels of a narrowbody, there would be a 3 year learning curve to consistently produce parts within drawing (same with Airbus, it is just where we are in CFRP technology in maintaining tolerances.). There are multiple reasons the A350 didn't ramp up production faster and the extreme example of the 787.