I was just reading the "Best Practices" section on the web site.
On the topic of spark plugs for aviation rotaries; is there any new
information or suggestions since the 2005 article?

It's been a long time since I worked on any Lycoming or Continental engines
but I don't remember changing plugs in those every 25 hours. Would a larger
aviation style plug lengthen the time between plug changes on a rotary?
Has anyone investigated this or other spark plug ideas for use in the
rotary?

Jay

THe plugs fire twice as often in a rotary so you get a lot more wear and tear.
If you burn 100 LL the plugs don't last as long as if burning unleaded car gas.
Also you can try the new iridium plugs that come in the RX8,

Paul Lamar