User:Jefferydodson4031

THE FIELD RETORT GASIFIER (aka "The Redneck Rocket Booster" / RRB)

An Open Source Biochar and Syngas Production System

Invented by Jeffery Dodson — March 2026 Released freely to the public domain for the benefit of all.

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THE INVENTOR'S STATEMENT

"I just wanted to help make the world a better place and help people who are off grid with their lives." — Jeffery Dodson, inventor

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WHAT IS THE RRB?

The Field Retort Gasifier is a portable, two-part system for converting woody biomass waste into biochar and usable syngas in field conditions. It is designed to be built from universally available materials, operated by a two-person crew, and deployed anywhere biomass waste exists — from logging slash piles to small farms to off-grid homesteads.

It is being released as open source hardware, free for anyone to build, use, or improve.

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THE SYSTEM — TWO COMPONENTS

COMPONENT 1: THE BASE UNIT (Reusable) • A rocket stove design built from sheet metal • Firebox in heavy gauge mild steel for durability • 4-6 inch mild steel chimney that mates with the drum above • Accepts syngas recirculation from the drum as supplemental fuel • Bolts together for flat-pack transport and field assembly • Elevates the drum safely off the ground reducing fire risk • Designed to last indefinitely with basic maintenance

COMPONENT 2: THE MODIFIED DRUM (Replaceable) • Standard 55 gallon steel drum with airtight lid • Internal 4-6 inch mild steel chimney tube welded to lid,

 running full depth of drum — delivers heat to center of 
 feedstock mass for even, efficient pyrolysis

• 3-way ball valve and 1-2 inch syngas outlet pipe welded

 near top of drum — controls gas pathway

• Hose fitting welded into drum for quench water or

 nutrient solution injection

• Welded side handles for safe two-person handling • Uses standard, globally available fittings throughout • Drum is a consumable component — replaced when worn,

 preserving the valuable base unit investment

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HOW IT WORKS

SETUP A two-person crew transports and assembles two or more base units at a biomass waste site. Feedstock is cut to fit the drum. A loaded, sealed drum is placed on the heated base unit.

PYROLYSIS PHASE The rocket stove heats the drum from below while the internal chimney tube delivers heat through the center of the feedstock. The 3-way valve is set to recirculation mode — syngas produced by the heating feedstock feeds back into the rocket stove firebox, sustaining and intensifying the heat. The system becomes largely self-fueling once pyrolysis is underway.

POWER/FUEL MODE (Optional) Once pyrolysis is fully established the valve is switched to divert syngas to a generator for electricity production or to a collection vessel for later use as fuel. The system can produce biochar and electricity simultaneously.

QUENCH AND RESET When feedstock is fully converted to char, a water hose is connected to the quench fitting. Water introduced into the hot drum generates steam which vents back through the syngas recirculation pipe, automatically extinguishing the fire in the base unit. The drum cools to a safely handleable temperature. The finished drum is removed and replaced with a loaded empty drum. The biochar can be enriched by using a nutrient solution instead of plain water during quenching, delivering fertilizer-loaded biochar directly to the soil.

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KEY ADVANTAGES

✓ MOISTURE TOLERANT — Unlike TLUD and similar systems, the

 RRB does not require dry feedstock. The sustained external 
 heat source drives pyrolysis regardless of moisture content,
 making it viable for green wood, logging slash, and 
 agricultural waste in real field conditions.

✓ SELF-HEATING — Syngas recirculation makes the system

 largely self-fueling once pyrolysis begins, reducing 
 external fuel requirements.

✓ DUAL OUTPUT — Produces both biochar and usable syngas

 simultaneously. Syngas can heat the process, generate 
 electricity, or be collected as fuel.

✓ FIELD PORTABLE — Two-person deployable. Multiple units

 operated by one crew. Bolt-together flat-pack design 
 fits in a standard pickup truck.

✓ UNIVERSALLY BUILDABLE — Designed around a standard 55

 gallon drum and globally available pipe fittings, ball 
 valves, and sheet metal. Buildable anywhere in the world.

✓ AUTO-SAFE SHUTDOWN — Quench procedure automatically

 extinguishes the base unit fire via steam backflow.
 No separate shutdown procedure required.

✓ SLASH WASTE UTILIZATION — Directly addresses the problem

 of logging slash burning, converting a pollution source 
 and fire hazard into biochar and energy.

✓ OFF-GRID CAPABLE — Designed specifically for people

 living and working off the grid with limited resources.

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APPLICATIONS

• Logging and forestry waste conversion • Small farm soil improvement • Off-grid power generation (syngas to generator) • Developing world appropriate technology • Carbon sequestration projects • Community biochar production • Disaster relief and remote area operations

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OPEN SOURCE DECLARATION

This design is released freely by the inventor under the Creative Commons Attribution-ShareAlike 4.0 license (CC BY-SA).

Anyone may build, use, modify, or distribute this design for any purpose including commercial use, provided that:

1. Credit is given to Jeffery Dodson as the original inventor 2. Any modifications or improvements are shared under the

  same open license

No permission is required to build this device. No royalties are owed to anyone. This design belongs to humanity.

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CURRENT STATUS

Design stage — detailed plans completed March 2026. Prototype in development. Seeking fabrication partners, research collaborators, and field testing volunteers.

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CONTACT

Inventor: Jeffery Dodson 28934 Weatherly ln. Sweet Home, Oregon 97386 458 223 4834

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This document was first published: April 2026 This publication establishes prior art for all elements of this design as described herein.