I discovered today that the NGK ME-8 spark plug is no longer made. I've
been using the 1/4-28 plugs in my Augmented Spark Igniters so I'm
looking for a replacement in the same size. In addition to the cheap
import knockoffs, the Rimfire VR2 looks to be a near exact match:
http://sparkplugs.morrisonandmarvin.com/14-32.php
Has anybody used the Rimfire plugs in a rocket application? The only
thing I'd be concerned with is the prolonged heat and temperature
causing a leak around the insulator. I suppose I could do a little
igniter test program to qualify them myself. On this page, they claim
XCOR, NASA and other aerospace companies use them:
http://sparkplugs.morrisonandmarvin.com/main2.php
-Bob
