Attention, killjoy alert… 
@LeSving, It produces thrust where the exhaust leaves the turbo, even if on occasion the gas flame breaks through.
The construction of this primitive jet engine is the “loo roll holder version” of one he used, built to a somewhat higher standard, and used to push along a scooter.
So it is an engine according to your definition. Just not a very efficient one…
Which bit of “incapable of flight” you did not get Cobalt? that is a scooter not an aircraft, tough I wonder where “thermodynamics usuability” argument stops…
I love DIY turbines. Started one when I was in school but the fancy AUDI turbocharger I snapped up on ebay turned out to be too “good” for it (needed oil cooling etc..) and I abandoned the build.
Cobalt wrote:
The construction of this primitive jet engine is the “loo roll holder version” of one he used, built to a somewhat higher standard, and used to push along a scooter.
That makes it an engine 
Good work !! You have to remember, hard core RC guys have built jet engines out of turbo parts ever since turbo charging became mainstream in smaller engines (cars) some 30-40 years ago. They very soon transformed into highly refined specialized pieces. Now, 40 years later, this dude makes a torch while jumping and screaming, and calls it an engine – not very impressive
It seems to me what this guy is doing, is taking true and trusted RC/drone/MC/lawn mover tech, puts a hillbilly scrap-yard edge to it and lots of over-done make up enthusiasm. A great show for some I guess. I have never seen him before, and will probably never see him again
I sometimes watch these guys:
