Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/17/84; site hplabsb.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!pesnta!hplabsb!bl From: bl@hplabsb.UUCP Newsgroups: net.auto.tech Subject: Re: Spark plug technology Message-ID: <3163@hplabsb.UUCP> Date: Tue, 12-Nov-85 16:27:16 EST Article-I.D.: hplabsb.3163 Posted: Tue Nov 12 16:27:16 1985 Date-Received: Thu, 14-Nov-85 00:49:33 EST References: <1856@watdcsu.UUCP> Organization: Hewlett Packard Labs, Palo Alto CA Lines: 35 > > As well all know (since we read net.auto.tech, right?), a spark plug > has an end shaped something like the diagram below: > > > |---------------\ > |-------------\ \ > gap --> _____ \ \ > | | \ \ > | | | | > | | | | > > Well, how about this design? I found one of these just last night. > Anybody seen it before? > > gap > | > | > v > > |----| |---------------\ > | | |-------------\ \ > | | \ \ > | | \ \ > | | | | > | | | | > > Where I found this was on my new (!) 1956 Porsche 356A 1600 engine. I > was disassembling it, and pulled the spark plugs to examine them. I > took me about three looks before I actually figured out why the plugs > didn't look right. Is this what all plugs used to look like 30 years > ago or is this specifically a Porsche plug (they're made by Bosch). Plugs like these have been used in nearly every piston powered airplane ever built.