Archive of the Yahoo! Groups mailing list for the Bug hand-launch glider 2002-2018

From: "Daniel Armstrong" <daniel.armstrong@...>
Date: Monday, September 1, 2003 5:41 AM
Subject: Re: [BugHLG] Some silly questions...
Carbon fibre is black in colour, fibreglass is normally white. Carbon fibre is considerably stronger than fibreglass and more expensive weight-for-weight. The engineer's theory of bending shows that, when used as a spar, a tube can carry almost the same weight as a solid rod for a substantial weight saving. If you sand a carbon rod you should get a fine black powder (don't breathe it in), with fibreglass it will normally be a fairly coarse white powder with what appears to be little fibres in it. Regards Dan > This question has been bugging me a long time and I have been too > embarrassed to ask. What is the difference between carbon fiber and > fiberglass? I can I tell? Which one is heavier? Is tube better than > solid rod for wing spar? I guess it must be lighter and more rigid? I > suspect my solid rod spar is actually fiberglass although I don't > know enough to tell. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.514 / Virus Database: 312 - Release Date: 28/08/03