Springs - Hughes 1111
Engines going in a Duster.
1/4 pass I don't know, maybe Minot, ND
Downsweep at around 250 rpm/min, but this is a Stuska with inertia correction so the numbers should be close to steady state numbers and should also match upsweep numbers. That is how the inertia correction value is set; do both an upsweep and downsweep and adjust until the numbers match. In addition the slower the sweep rate - the smaller the inertia correction. The numbers could be a little higher than what a SF upsweep would be.
There have been some huge discussions on Speedtalk on the subject of inertia correction.
It is about 2000 ft here.