German ultralight aircraft specialist, Flight Design, has chosen Hexcel as its key supplier adopting low-temperature curing prepreg into its aircraft production. Hexcel’s HexPly M79 carbon fibre prepregs deliver a more consistent final product by ensuring constant material quality and processing parameters and produce a lighter aircraft at better cost.
Flight Design has always relied heavily on composites for its aircrafts’ ultralight construction and turned to long-term composite materials partner Lange + Ritter, part of Hexcel’s European distribution network, when they began searching for a prepreg material solution. Hexcel and Lange + Ritter created several new product codes specifically for Flight Design and then supplied materials for initial handling trials and prototyping. Hexcel’s HexPly M79 low temperature curing out of autoclave solution was first used in the new F2 prototype. As part of its material supply package, Lange + Ritter also sent a team for on-site training and technical support, allowing the Flight Design production team to get up to speed with prepreg as quickly as possible, according to a press release by Hexcel.German ultralight aircraft specialist, Flight Design, has chosen Hexcel as its key supplier adopting low-temperature curing prepreg into its aircraft production. Hexcel's HexPly M79 carbon fibre prepregs deliver a more consistent final product by ensuring constant material quality and processing parameters and produce a lighter aircraft at better cost.#
HexPly M79 prepregs can be cured at temperatures as low as 70 °C for eight hours or 80 °C for four hours, reducing tooling costs and increasing build rates. When combined with Hexcel’s innovative air venting grid technology, HexPly M79 UD carbon tapes can also be laminated with reduced debulking steps to produce void contents less than 1 per cent, irrespective of laminate thickness. With consistently low void contents and improved mechanical properties, designers and engineers are able to further optimise highly loaded composite aerostructures.
As more and more of its composite aircraft parts are transferred to prepreg technology, Flight Design is seeing the benefits of its switch to HexPly M79. Lay-up is cleaner and more precise, low temperature oven curing is quick and energy efficient, and the manufacturing process consistently outputs exceptionally high-quality laminates and components. The long-term strategy is to integrate HexPly M79 across the range, with Hexcel materials lightening the ultralight aircraft at Flight Design even further.
“The materials and technology package from Hexcel and Lange + Ritter has been a big success for us at Flight Design. When we took the decision to switch to prepreg, we looked at many options but only Hexcel and Lange + Ritter could offer us low temperature out-of-autoclave (OOA) curing, globally respected material quality and the customer service levels we were searching for,” Daniel Gunther, managing director at Flight Design said.
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