I do not know how the 2.8BHP is calculated. MLD mfg told me of that number.

I had the same curiosity as some of you. That was why I posted the test data with wood and APC props (reducing bs factor). This way, all of us should be able to reach the same result after 30min of breakin. This engine will improve with time. In addition there will be limited hop-ups/upgrades.

Peace,
Steven Chao,
Cermark