O.K. All good questions. And all answered in the text reading of this book.
At least one of the two authors was a new citizen American (and one non-cited advisor - Harry Lafontiane). So with English as a second language their written English is very standard 1974 late 20th century usage. And two of these fellows DID go on to university teaching, in America, in English.
The sentence phrasing is very straightforward, plain. Is very dense, compact. Every sentence, half sentence has meaning.
Where is the Wayne Kieth Pegasus in this book?
page 108: “In order to improve the heat budget of the pegasus it is normal to preheat the air stream from the heat content of the gas or BY RADIATION FROM THE HEARTH ZONE.” The WK used extreme fire tube air pre-heating. " . . . the pegasus will be equipped with heat exchangers just beyond the gas exit. . . " The WK external heat exchanger/soot dropper. " . . . the air stream is led around the wall of the stack (fire-tube/hearth), cooling this in the process." Goota’ be careful highlighting this out as this IS a dedicated WK-book feature.
WK heat budget designing is told by Mr. Wayne saying to paint with low temp black paint. Look for heat changes in this paint. Redesign to stop losing that heat energy.
Actually much more on the WK big flexible volume ‘charcoal tub’ (my words) method in the page 56 beginning “Inertia in Processes” section. Very, very important vehicle in traffic considerations in just a few sentences pointed out there.
Where the true WK’s as Wayne makes then can exceed these authors experiences and design is in his incorporating the IC engine waste heats back into the wood-for-shaft-power balancing act.
Easy to do stationary.
Hard to do mobile. Why mobile, most all except Waynes own builds, and some shown up 1940 European Ag tractor systems just ignore engine heats. Throwing out the baby with the baby-bath water imho.
Why no condensation collecting wood drying hopper shown?
The authors are very aware of these. Chapter 10, Design of a Vehicle Pegasus System, page 95: " . . . but many endeavor by a double wall arrangement to use the heat of the raw gas to pre-heat and dry the fuel column by passing it through (a) space between xxx inner and outer (hopper) walls, see Fig 6. The inner wall should be CORROSION RESISTANT to withstand the effects of distillation products, particular acidic acid." Then two sentences describing the construction of a double wall with steaming slits and collector space. "This type never gained popularity, as only a modest fraction of distillates was exacted from the fuel, and the corrosive liquids caused frequent leakages."
Their design for weight, space and maintenance concerns was based as they said clearly in the Fuels chapter, on pre-dryed down sub 15% moisture fuel wood.
Kudo’s to Wayne and others building for really wet woods and airs.
The price? Higher weight, space and maintenance’s.
As a PNW 9 months of the year wet-footer unable to air dry woods, well worth it in my opinion.
tree-farmer Steve unruh