OCT 2018


Issue link:

Contents of this Issue


Page 56 of 83

NEWS 55 Donna Dawson is CW's (previously) retired senior writer emeritus, now residing and writing in Lindsay, CA, US, in the foothills of the Sierras. floor components, metallic plates and inserts, and other interior components are bonded into roof and body primary sub-assem- blies before they are bonded together. Bus doors are still aluminum; however, some of Proterra's suppliers have composites versions in the works, Stewart says, adding, "we hope to be the first to have them." Doors and other interior components are attached using Proterra's proprietary composite mounting brackets, adding an extra strength-to-weight advantage. e brackets are attached either by molding stainless steel inserts into the laminate, or by bonding. For attaching the doors, hat brackets are bonded onto the adjacent body, with stud plates embedded into the brackets. e door structure is mounted to the stud plates. "is is not only convenient, it is a dimensional aid for correct door positioning every time; there's no guesswork in the install," Stewart says. Bumpers currently are also primarily aluminum structures with reaction injection molded (RIM) plastic covers, he adds. Bumpers are attached to the body by bolted hat brackets. Methyl methacrylate (MMA) adhesive is used for all bonding processes. e cured sections of the roof and body are adhesively bonded together to complete those sub-assemblies and the sub- assemblies are then adhesively joined for a permanent bond to create the finished product. Better and less expensive than More than 140 of the buses, a mix of Catalyst FC, XR and E2 35- and 40-ft models, were on the road by year-end 2017 in communities across the US from Washington state to Florida. at number is expected to double in 2018. "We're expanding our production capa- bilities to meet existing sales and projected demand," says Stewart,. In addition to the emissions advantages, and the high mileage between charges afforded by the lightweight composite bus body, the Proterra/TPI design also reaps financial benefits. Factoring in fuel and maintenance cost savings over the lifetime of a vehicle, Proterra calculates its buses save transit agencies US$448,000 during a 12-year service life compared to diesel alternatives (about $2.36/ mile compared to US$2.83/mile). Read this article online | hybrid_bus Technology for Zero-Emissions Buses C O M P O S I T E P R O C E S S M A T E R I A L S Aerospace & Defense CERTIFICATIONS Aerospace & Defense CERTIFICATIONS Aerospace & Defense CERTIFICATIONS @DiatexSAS DIATEX SAS SocieteDiatex Booth H29 VACUOPEEL ® INFUPLEX FOR VACUUM INFUSION * designed by DIATEX * FOR VACUUM MOULDING * MU LT IFU NCT IO N A L Product range SM AR T Multilayer Systems

Articles in this issue

Links on this page

Archives of this issue

view archives of CompositesWorld - OCT 2018