Taylor 104 Batch Freezer Question

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The original was posted on /r/icecreamery by /u/ceokco on 2023-06-22 17:05:10+00:00.

In the instruction manual for the Taylor 104 Batch Freezer it says this:

'Freezing Cylinder

One, 3 quart (2.9 liter). Pre-charge of liquid mix determines overrun.'

I'm confused by what they mean by 'pre-charge' - does anyone have any insight into this? Do they mean air injected into the mix? How could they not account for the dasher and how it incorporates air?

If you have any answers please reply!

Thank you,