I'm going to take a guess and say I bet there are different types of incinerators purpose-built for different functions. One built for trash may be different from one built for deadstock or bodies.
You are correct
ArianeEmory ... thank you
A typical campfire is an (open air) incinerator .... a basic enclosed incinerator is typically a 45 gallon steel drum (burning barrel) with the top removed , throw in your garbage and set it on fire .... these were very common before modern curbside garbage pick up .... many rural folks and farmers still use them .... throw all the household garbage in it and burn daily .... every few months dump out the ashes and tin cans and take the ash residue to the landfill .... or dump it in a pit on the farm.
Another type of common incinerator is a larger steel enclosure (like a large barrel) ... with a bit of a smokestack out the top and an opening in the bottom for incoming air ... fire is hotter , less smoke , and less chance of burning debris blowing around the yard. They used to be common around junk yards , back of large retail stores (for burning all the cardboard packaging) etc
Those type are
fueled by the contents ... garbage , paper , plastics , scrap wood ... the fire goes out once everything burns.
..............
The animal disposal incinerator/crematorium is
something completely different .
It is a sealed compartment with a lid on it , it is lined with firebrick .... there is an opening in the bottom where an
outside source of fuel is injected (propane or diesel) ... plus an electric fan-blower forcing air into the opening (provides a sufficient oxygen supply).
The result is a
large , hot , blow-torch type flame that quickly burns the contents .... as well some models have an upper chamber where additional fuel and air is injected to help burn the smoke particles ..... operating temperatures are typically in the 1000* range
These animal type incinerators have a small market and limited application because they they are expensive to buy , they consume a lot of fuel and require an electrical power source.
Nobody would ever use them to burn wood scraps or garbage because of the high operating cost .... for example if someone wants to burn wood all you do is pile it up and put a match to it. Nothing else is required.
An animal carcass will never burn on its own (70% water) ... thus the requirement of a 1000* blow-torch in a closed compartment (takes an hour or two.)
Large livestock / bird barns can justify the equipment and fuel expense because they
must dispose of dead animals / birds on a daily basis and must stop any potential disease from spreading (bird flu etc)
Summary ... the DM incinerator has a small application of use and that is what makes it so unique in this criminal case.
Additional trivia .... if DM and associates did not fully accomplish their intended disposal it is because
--they did not let the unit run long enough
--unit ran out of fuel
--they did not bring a portable generator to power the fans (110 volt)
--nighttime panic/pressure to exit the area quickly (nosy neighbors)
--urgency to attend to the stolen truck (remove seats, hide truck)
Even if the whole thing had been well planned out in advance ... the perps would have had several high-pressure - hectic hours to accomplish what they did .
I expect rural sleuthing neighbors will contribute timeline witness info to LE regarding the activities on Roseville during those days and hours
I expect city sleuthing neighbors will provide some timelines to LE regarding parking of trailer at MB's driveway
Long live observant sleuthing neighbors.
A.M.