[Paparazzi-devel] FAQ - Are internal combustion engines supported?

[Jeremy Reinertsen]

Hi folks,

The FAQ states "Yes, not relying solely on inertial measurement, the 
Paparazzi system is very well suited for aircraft with high vibration 
levels. Care must be taken to prevent oily exhaust residue buildup on the IR 
sensors and a simple variable must be added to properly address the special 
idle/kill needs of an IC engine."

What is this "simple variable" for IC engines?

Cheers
Jeremy