@article {Yankovoy:1975:2161-6027:39,
title = "Fabrication of BoronHybrid Swashplates",
journal = "Journal of the American Helicopter Society",
parent_itemid = "infobike://ahs/jahs",
publishercode ="ahs",
year = "1975",
volume = "20",
number = "3",
publication date ="1975-07-01T00:00:00",
pages = "39-45",
itemtype = "ARTICLE",
issn = "2161-6027",
url = "https://www.ingentaconnect.com/content/ahs/jahs/1975/00000020/00000003/art00005",
doi = "doi:10.4050/JAHS.20.39",
author = "Yankovoy, Alexander",
abstract = "This paper describes Boeing Vertol IR&D prototype production and subsequent programs for the development of a fabrication method for high modulus composite rings for reinforcing swashplate assemblies of the Boeing Vertol Heavy Lift Helicopter (HLH). The fundamental design requirement
was to fabricate four sizes of boron epoxy (AVCO 5505/4 Rigidite) rings 0.160 in. to 0.200 in. thick and outside diameters ranging from 44 in. to 58 in. and adhesively join them to a 7075T73 aluminum alloy swashplate. The purpose of a subscale hardware program was to develop
machine design parameters relative to resin content, winding rate, compaction loads, tape tension, guides, and tracking. Five subscale rings were fabricated. Elastic moduli progressed from 15 \texttimes 106 psi to 27 \texttimes 106
psi, exceeding the design requirement by 12%. Phase II translated the experimental data into the design and fabrication of a full scale machine which produced composite rings having an elastic modulus of 36 \texttimes 106
psi (50% greater than required). The final portion of this investigation involved the joining of the boronepoxy composite to the 7075T73 aluminum alloy substructure. Large differences in thermal expansion characteristics of the two components precluded the use of a thermo
setting adhesive. A roomtemperaturecuring acrylic based adhesive system, TAME 200 PB2, recently introduced by B. F. Goodrich was used.",
}