1 points by LongTermCapital •

And now for something completely different.

http://quasiturbine.promci.qc.ca/EProductQT75SCChainsawPneu.htm

The fact the page is from 2004 and not significantly updated would suggest their air motor idea didn't pan out as well as they hoped - well for use in a chainsaw at least.

I guess somehow they missed a timber felling induction course or just seeing a chainsaw in practical applications - though cutting slowly and gently is called for time to time, but mostly it's high rpm, cut quickly to point where shear will occur or as clean a cut as possible. Pneumatic chainsaws are available [1] [2] [3] [4]

Apparently they were applying the quasiturbine idea as an engine - internal combustion -- I tried to search to see why their motors didn't take off - the first decent promising result was from 2014 talking about high wear and temperature issues ... unfortunately the result is from a site (wouldn't be the first forum I've seen to ban links to it for ... reasons) doesn't appear to use static links and made their dynamic links to articles meaningless such that data found during a previous crawl, upon visiting later on, the link takes one to a more recent answer, the old answer appears to be lost to its espace.

[1] https://eclipseenterprises.com.au/product/campagnola-pneumat...

[2] http://www.abgpl.com.au/product/Pneumatic-Chainsaw-Model-Tim...

[3] https://ajpind.com.au/products/spitznas-chain-saw

[4] https://contractorsupplymagazine.com/pages/Spre/CS-Unitec-Pn...

In a practical sense, dragging a compressor and hose around is like a generator and cords.

Or damn long hose and cords.

Batteries work fine and electric motors run smoothly.

Keep in mind the link is page dated Dec 2004. Why use an air tool, well choice would depend on what infrastructure already exists or if there are hazards to using hydraulic or electric powered devices. For example, orchards tend to use air pruners and for those who can afford it, bespoke platforms designed for pruning come with a suitable compressor to run the tools [1] Battery powered portable equipment has come a long way but I still don't see to many robust enough to not have to worry about their use in inclement weather.

[1] https://www.treefruit.com.au/orchard/orchard-equipment/machi...

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