Interesting.
It is surprising to me (but probably it is some aeronautics specification/need) that its 2-stroke engine uses 95 octane+4% oil mix, it is years that using synthetic oil you can use 2% or even 1% oil.
It is surprising to me (but probably it is some aeronautics specification/need) that its 2-stroke engine uses 95 octane+4% oil mix, it is years that using synthetic oil you can use 2% or even 1% oil.
Less oil in the mix (as long as lubricating is sufficient) is better.
The traditional 4-5% is for mineral oils.
Synthetic (totally or partially) oils can usually go on 2% (or 50:1) and in some cases as low as 1% (or 100:1).
Modern chainsaws and similar are already at 2%, see (examples):
https://www.stihlusa.com/information/how-to-guides/mixing-oi...
https://www.husqvarna.com/au/forest/when-working/usage/how-t...
https://www.amsoil.com/p/outboard-100-1-pre-mix-synthetic-2-...
Ignition in an engine for airplanes/drones/etc. is - obviously - much more important than in a common 2 stroke engine (chainsaw or similar), a "common" 2-stroke engine used in ultralights is the Rotax 582 (an earlier model was the 532) check its "limitations":
https://en.wikipedia.org/wiki/Rotax_582
The 582 has twin sparks (two spark plugs per cylinder) and runs on 50:1 mix:
OTOH, piston scoring from burning oil will probably increase the chance of a lock up over time.
This company designed hybrid engines for retrofitting onto drones
Their generators are amazing, 1-1.5 KW generator in less than 3 kg, or 3 KW in less than 4 kg, really packed power.
(BTW they use 2.5% or 40:1 mix)