Jeffrey R. Davis



Fuelage is a fuel and construction material made from grass or possibly other plant material. After the grass or other plant material has properly retted it is wet extruded in the form of a pellet and allowed to dry.


In the fall of 2007 I was experimenting with composting as a source of space heating. This is called the Thermo-Biopile [2] and can be seen in photo 17. The plant material used was switch grass and wood chips. Photo 15 is the grass field before harvesting and photo 16 is the harvest photo. During the summer of 2008 I noticed a black material when the Thermo-Biopile was disassembled. I saved some of this material to test as a feed stock for Fireballs.

You can refer to my other article in order to understand the Fireballing process [5]. The first step was to place this material in a rotating drum with rocks and then after a period of ball milling the rocks were removed and the feedstock was left in the drum to see if it would agglomerate into balls. The consistency of the material would not allow this but it might be possible if another material was added.

It became obvious that this feedstock would be best used in an extruder so I modified a meat grinder that can be viewed in photo 1. The Fuelage is drying in photo 2 and 3. I'm not sure if this material needs to be milled (in this case ball milled) some before before extruding. An extruder could be designed to dewater and maybe mill this material, thus possibly a higher density particle and shorter drying period. Photo 4 is a picture of a dried particle.

Paper Fireballs #1
Jeff Davis

Below you will find five links to short videos of fireballs being produced:

#1 Starting to reduce paper.



 Malot 1st drawing: looking in direction of the axle Malot 1st drawing: looking in direction of the axle
Malot 2nd drawing

1st drawing: looking in direction of the axle

2nd drawing: central part of the double-fins showing the different cut-outs, to fit all the three together.

air max 90 leather pink youth

Malot Blower Drawing
Malot Construction 1
Malot Construction 2
Malot Construction 3
Malot Construction 4
Malot Construction 5
Malot Construction 6
Malot Construction 7
Four Blade Malot Blower #1
Four Blade Malot Blower #2
Four Blade Malot Blower #3

First posted by Jeff Davis on 14 July 2007.

The thickness of the shaft is no problem. I attach an exel-sheet, where you
can see this.

The difference in cross-square between a 0.5cm shaft and a 4.5cm shaft is
more or less the same as the difference between a rotor-diameter between
19.5 and 20.0cm. If you need a bigger central hole because and the rotor
would not work (which I don't believe), make the diameter of the rotor a

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