“How can the hourly rate be 1/3 of my previous calculation?”
Well lets look at some real uk numbers against yours;
You are paying £1.60 pl for fuel, I am paying £1.27 (based on today's prices)
You are burning 20lph on an std 912 80ph Rotax – that is mad. The Book figure for a 912 ULS 100hp is 18.5lph, my engine has averaged 17.8L over the last 300h.
1500 hours you are having a laugh – most Rotax engines get north of 2500h many to 3500 – no restriction on running on condition in the UK under the LAA. For hour building you will not have a significant impact on second hand value over a few years so engine fund is zero.
“plus the 55 euro/hour” really – my maintenance cost is running at an average of £472 per year all in (over 8 years).
“The fixed cost can be higher or lower depending on hangar fees”. - I pay £1k per year for my own hangar.
I think you will find the average UK LAA owner is paying much less than you are.
Rod1