i would say 10%Isn't it about 5% lost between engine and pto.
Might be wrong tho
totaly agree sitting in the yard compared to in the field under load on a hot day a high hydro loading baler etc or air seeder on a power harrow etc etc could change the out comeAll very well measuring horsepower at the PTO with the tractor being stationary, but would be interesting to test a tractor with a dyno on the PTO , with the wheels turning with resistance to show transmission losses in operation.
be intresting had a few crank out better than listed others falling short most a tad short were cranked up
i'd also been keen to see what diffrence all the power sucking add ons pull the Hp down like fan ,A/C , lights , hydro pump under load
etc
being new once a few hours on it it may free up a tad ...
i'd also keep in mind some dynos are not to be trusted and may give poor or over high readings
ah you mean like what profi do at the DLG testing placeAll very well measuring horsepower at the PTO with the tractor being stationary, but would be interesting to test a tractor with a dyno on the PTO , with the wheels turning with resistance to show transmission losses in operation.
did it catch anythingTalking of losses, Back in the 80s my mates Mini Metro used to hunt when you switched the indicators on.