> I would start with something used in the turbo street engines and go  a bit
> colder than that.
>  
> The6725 -115s are $25.00 each. Very good but there are others that work as  
> well, and are less costly.
>  
>  
> Lynn E. Hanover

Lynn, which spark plugs would be suitable for Turbo rotary in aircraft?
Buly