As most of you know I prefer to use lithium as my power source for the 21st century. As such most of my glow information and engines have been crated up and placed in storage a long time ago. As such I have to apologize for taking so long to find and post this asked for information about the last production run of the FOX baffle 0.78. This is from an article by Peter Chinn. Lets see if these Fox 0.78 power plots will post. If it posts I'll come back a write my observations with the engine and a little of what Peter Chinn wrote.
For those that like prop rpm here is some of what Peter Chinn found, again this was with rational fuel 80/20 (NO NITRO!) and stock Fox muffler.
The prop was a Top Flight maple.
TF [email protected] rpm
TF [email protected] rpm
TF [email protected] rpm
TF [email protected] rpm
TF [email protected] rpm
TF [email protected] rpm

All the best,
Konrad