Interesting composite stuff:
As part of the wing research and development program, Bombardier’s Belfast operation has developed an innovative Resin Transfer Infusion (RTI) technology to manufacture the large one-piece wing skins and structural spars for the wing torque box. It has manufactured and assembled a pre-production demonstrator wing, which has been successfully tested to ultimate load, replicating 150 per cent of the most severe forces the wing is ever likely to experience in service.
Several local Northern Ireland companies have been engaged in the production of the demonstrator wing, in addition to the local firms involved in the design, construction and equipping of the new wing facility. Northern Ireland engineering and manufacturing companies will also have an opportunity to bid for work packages on the wing production in the coming months. Meanwhile, a delegation of small- and medium-sized engineering enterprises from Northern Ireland took part in business-to-business meetings in Washington this week with some of Bombardier’s US suppliers. The event was hosted by Invest Northern Ireland.
https://www.bombardier.com/en/media/...ardiercom.html
RTI (Resin Transfer Infusion) is a Bombardier patented process used to produce the wing skins of its CSeries aircraft. Infusion of resin into the preform is performed with vacuum pressure only. However, the mold is located in an unpressurized autoclave during the infusion step. After the preform is fully infused, the autoclave is pressurized and heated to perform cure. This makes it easier to achieve high laminate quality because positive cure pressure (>14 psi) helps prevent void formation from entrapped air and volatiles. It has the drawback that a suitable size autoclave is still requited.
http://www.drycomposites.com/resin-i...pace-industry/