Hi folks,
I did a really nice mountain flight last saturday, it was really windy,
I took off with 50 liters in the tanks
I had to climb up to 7000 feet to avoid big turbulences, it took me 30 ' to 7000 ft,
the flight lasted 1H38 minutes (taxiing not taken in account)
back to my airfield I emptied the tanks to precisely find out my consumption ... fuckin hell I had only 10 liters remaining ...
24 lt/ hours ! : 6.35 US gallons per hour .... Crazy
I think it comes from the fact i had to climb high and sometimes forgotten to switch back to eco cruise speed, also I had my jet needles in the highest position ... but 24 lt/h ! it is crazy ... 6.35 gallons ....
I have changed jetting lowering my needles to the minimum, as a matter of fact my egt were displying 540 celcius (1000 f°) , it was to cold=too rich .. also the air was really hot ...
but it shows that two stroke consumption really can sky-rocket ... scaring ...
what do you think of of it ?
Benry did you calculate your 582/sportcopter consumption ?
I really wonder if comes from my engine or if everybody consumes so much gas using the same engine then mine on a gyro ..

My rule of thumb is 1 gallon for every 15 min of flying. I never go above 2000 so for you to burn just 50%more to go to 7000 doesn't sound odd to me really.
I have the capacity to carry 15 gallons on board, but I weigh too much to fill up all the way :(

Hi Bro,
4 gallons a liters per hours would be a dream for me,
I think that the normal consuption is around 5 gallons
even 5 gallons would be a dream for me ...
as I was telling you privately before I saw your reply here is that I had my jet needles at the eighest position which is stupid in hot times
I have set them back to the lowest position and tested it is a short flight, my egt's are 1100° F, I hope it will help .. because for the time I can't fly more then 1H45 ... and it is really short when lingering in the mountains..

Yep those 2 smokes are thirsty, My Dom with 582 burned about 6 gal/hr that's just what they do..

hi guy's ,
on second thought, after your posts I also think that there are no other means of calculating my flight other then taking in account a 6.5 gallons per hours...
Adapting my jet needles height to the optimum position according to the temperature, and trying to moderate my cruise speed after ascent will only be means of going to the safe side .
so all of this means 1H30 of flight if I want to keep a descent 20 minutes margin ..
this is as matter the reality of two smokes like Elwood was saying ...
thanks for help floks

Hi,
I have new data to share, if it can help anyone in the future
I went in flight to a homebuilder meeting in my mono (582 rotax) , I flew 60 to go 71 minutes to comme back (head wind in both case).
temperature was 95° F (35 celcius) , I flew at 2000 ft, most of the time at 5800 rpm (egt 600°c 1100° F)
I took off with 59 liters
taxiing andpre-rotation 25 minutes ... say 4 liters
I landed with 10 liters in the tanks (I emptied the tanks in a graduated jerrycan to be sure)
in total I burnt 49 litres
then in flight the engine sucked 45 litres in 131 minutes so : 20.6 litres (5.44 us gallons) per hour
lowering my jet needles and paying attention to my engine RPM , reduced my consumption by nearly 4 liters per hours
consumption will be smaller in winter when air will be cold ... but it will never get under 20/lt/hr
hope it will help

My Subaru EA81 I work on 20 l/hr (might be slightly less, but I just work on this figure)
AFAIK EJ22 use about the same, 20 l/hr, thought they are heavier and more power. (as far as I know)

My probably only option to lower fuel consumption is to buy a 912.
But I would have to buy it with someone else's money.

Rossco

Hello Ross,
thx for your message.
those datas are interesting in terms of safety ..
we need to be all realistic .. and I was not really before I really checked all emptying my tanks after several flight, having taken the precaution to chronometer precisely taxing time and flight time with skydemon flight application.
I am really curious to find out what I will burn on my untested 235 kilos rotax 912/pagotto turbo charger dom inspired gyro ..
regards
G