Ethanol_from_apples
For predictable results juice the apples and check the sugar content with a hydrometer.
Add water until you reach between 1.080 and 1.100
Then add the yeast.
For best results use a fast acting yeast such as a brewers yeast or
Turbo yeast otherwise your juice will spoil too quickly for the yeast to use the sugars.
A pickup truck full should make 5 or 6 55 gallon drums full of mash.
If you can only mash and grind the apples it will take more drums, a lot more.
It will also consume more time than you may have…
Source: Alcohol Fuel Forum