FE-Conversion numbers are off.

[Bluberry-Kat]

in thermionics, conversion between different kinds of energies is lossless. this is intentional and expected.
in 4be2741, rotary : FE conversion was added.
i'm sure the numbers look correct on paper.
however, they do not function correctly in practice.

in the above image is two almost-identical setups. one turns heat into rotary and powers a hammer mill.
the other turns heat into FE, which gets turned into rotary and powers a hammer mill.
in theory, they should run at the same speed. to test this i ran the hammer mills simultaneously for 5 minutes.
these are the results.

the left barrel is the FE-powered mill, the right barrel is the heat-powered mill.
this is a huge discrepancy, and, i suspect, in the right environment, could potentially be a dupe-bug for FE.

[falkreon]

One firebox should be starving the motor regardless of what you do. Does this repro with 5?

[falkreon]

Anyway I definitely don't consider speed a problem here. RF has always had an advantage in buffering and transmitting power. What I'd be worried about is if, say, 256 coal on the RF side produced more gravel than 256 coal on the direct-drive side.

[Bluberry-Kat]

a similar setup.

both sides have 5 fireboxes, 8 coal each, 40 total (per side)
left side is the FE-powered one. right side is the heat-powered one. similar result. less of a discrepancy, but still noticeable.

a somewhat more compelling setup:

this setup, theoretically, will generate more energy than it consumes.
to test this, i put some energy in a battery. not a ton.

then i plug it into the motor, aaand..

bam. free energy. and it'll keep going endlessly without intervention. this is certainly unintended.

EDIT: i suspect this might not be a problem with the numbers, but perhaps an oversight in how FE is consumed with the RF Motor. shrug.