Date: Sat, 13 Mar 1993 07:53:34 GMT From: plepez@ulb.ac.be (Lepez Philippe) Message-ID: <9303130753.AA07199@is1.vub.ac.be> Organization: Division of Applied Sciences, Harvard University Subject: ferrules Hi all, What kind of ferrule do you use : I only can find bronze ones and they are relatively heavy ? Would a simple aluminium tube be OK or should it be dural ? Does someone has try to build the ferrule out of Fiberglas spare, eventually warping and gluing a spectra wire around it ? (I know carbon fibre will crack, but I never played with Fiberglas). Good winds. Philippe. -- Philippe Lepez (CP 125), | | Good kite Universite Libre de Bruxelles, | Email: plepez@ulb.ac.be | + Good wind 50 av. Roosevelt, | Phone: 32.2.6503553 | ---------------- 1050 Bruxelles, Belgique. | Fax : 32.2.6503323 | = A lot of fun ! = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Date: Mon, 15 Mar 1993 17:08:43 GMT From: sasaki@netop3.harvard.edu (Marty Sasaki) Message-ID: <1993Mar15.170843.4417@das.harvard.edu> Organization: Harvard University Subject: Re: ferrules In article <9303130753.AA07199@is1.vub.ac.be>, plepez@ulb.ac.be (Lepez Philippe) writes: >What kind of ferrule do you use : I only can find bronze ones and >they are relatively heavy ? Would a simple aluminium tube be OK or >should it be dural ? Does someone has try to build the ferrule out of >Fiberglas spare, eventually warping and gluing a spectra wire around >it ? (I know carbon fibre will crack, but I never played with >Fiberglas). There are basically two types of ferrules, internal and external. Internal on ferrules slip into the tubes. Internal can be made of other tubes or of solid rods. Internal ferrules usually require a bit of reinforcing on the outside of the spars being joined to keep the spars from splitting. External ferrules are usually metal tubes that the spars fit into. I've used brass and aluminum tubes. Aluminum arrows, cut into pieces, make good ferrules. I have also used fiberglass tubing as an external ferrule with mixed results. The fiberglass does have a tendancy to split, an external wrapping with thread of some kind will help here. Many kite spar manufacturers will also provide hardware for joining tubes together. Beman and AFC both provide aluminum external ferrules. -- Marty Sasaki Harvard University Sasaki Kite Fabrications sasaki@noc.harvard.edu Network Operations Division 26 Green Street 617-496-4320 10 Ware Street Jamaica Plain, MA 02130 Cambridge, MA 02138-4002 phone/fax: 617-522-8546 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Date: Mon, 15 Mar 1993 19:39:19 +0000 From: dadams@dstrike.demon.co.uk (David Adams) Message-ID: <732224359snz@dstrike.demon.co.uk> Organization: Data Strike Computers Subject: Re: ferrules In article <9303130753.AA07199@is1.vub.ac.be> plepez@ulb.ac.be writes: >Hi all, > >What kind of ferrule do you use : I only can find bronze ones and they are > relatively heavy ? By chance I purchased some Easton Aluminium ferrules this lunchtime! They were from the Kite Store in Covent Garden, London, UK. They are light weight ones, i.e. for use in the leading edge and spine, not at the T-piece of the lower spreaders and spine. They also have heavy ones, I think they are brass. -- David Adams = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =