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Ginger Gardiner Senior Technical Editor

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Aerospace 2 May 2011

Marquez innovates aircraft TPCs

Marquez (Montréal, Québec, Canada) supplies TPC ducting for The Boeing Co.’s 787 Personal System Unit (PSU), and the TPC structural window bezel used on all Bombardier (Montréal, Canada) Global Express business aircraft.

Prepregs 1 Jan 2011

Performance requirements: CAI vs. OHC

John Russell, who manages nonautoclave research programs for the Air Force Research Laboratory (AFRL, Wright-Patterson AFB, Ohio), recently threw down the gauntlet at the Fall SAMPE conference in Salt Lake City, Utah: “Give us a 25 percent improvement in notch properties with no microcracking in high-modulus fibers.” While OOA prepreg suppliers can’t do much about fiber microcracking, Advanced Composites Group (ACG, Tulsa, Okla.) already has announced that its XMTM47 material will be commercial by next year, designed for 120°C/248°F service with the increased notched performance requested.

Adhesives 1 Jan 2011

Out-of-autoclave prepregs: Hype or revolution?

Oven-cured, vacuum-bagged prepregs show promise in production primary structures.

Bonding 1 Jan 2011

Old is new in vacuum bonding honeycomb sandwich

In Care and Repair of Advanced Composites (published by the Warrendale, Pa.-based Society of Automotive Engineers in 1997), Dr.

Aerospace 1 Jan 2011

CFRP upgrades economy seating

First aircraft seat to use visible CFRP revolutionizes aesthetics and comfort.

Infusion 30 Nov 2010

Single vs. double-bagged infusion

Russell Emanis (JB Martin, St.

Out of Autoclave 30 Nov 2010

Double-bag infusion: Thickness gradient and pressure

Cliff Walker (Vacmobiles, Auckland, New Zealand), explains how the large pressure changes during infusion result in laminate compression and thickness variations across the part.

Out of Autoclave 30 Nov 2010

Double bagging through three decades

A short history of double-bagging.

Infusion 30 Nov 2010

Absolute vacuum gauge

The following is an excerpt from Issue 12 of The Composites Letter, published by www.vacmobiles.com (reposted here by permission) that outlines the importance of using an absolute vacuum gauge to measure pressure levels during double-bad infusion:“Often called a precision vacuum gauge, an absolute gauge actually works the opposite way to a conventional dial type vacuum gauge.