Vertical engines I have but horizontal engine poor. I remembered an old Ariens mower I have with this set up. The engine belt drives a pulley that has a flat face on which a “tire” rides. The pulley will travel from edge to a little past center giving you forward and reverse with some variable speed control. Found this interesting but can it be adapted to handle say 20 HP?
How to Build a Wood Gasifier Truck – Mother Earth News
Gasifier Design Idea - Woodgas Farming - Drive On Wood!
Gasification Technology
Stratified downdraft gasification of wood chips with a significant bark content - ScienceDirect
Syngas Production, Storage, Compression and Use in Gas Turbines
PP30 25kW Power Pallet - ALL Power Labs
Energies, Free Full-Text
Engine, Turbine, And Power Transmission Equipment Market Analysis 2033
Waste to Energy (WtE systems) through gasification
An analysis of waste/biomass gasification producing hydrogen-rich syngas: A review - ScienceDirect