harry200sx Posted July 18, 2019 Share Posted July 18, 2019 so i had 6 litres of highly flammable liquid in a sealed plastic container, this, according to the manufacturers specs should have gave me between 1.45 and 2 hours of flight. The plug being a lovely coffee colour shows the motor is running as it should. So im happy to take of with my 6 litres knowing that i am safe for 1.45, i fly, i do my thing, i return, I overshoot my landing and roll on the throttle, to a splutter bang pop, (and thats just my arsehole). It turns out that i had consumed 5.75 litres of fuel in what turn out to be 50 minutes, i manage to nurse it to a safe controlled landing, smiling at the amazing flight i had just had. however on the way home i started pondering. A. how efficient is my motor B.how efficient if the wing and 3 lol. how inefficient does the wind make us all so now lets go into a little more detail of the three options A I fly a vittorazi fly evo 100cc if creates 56kg of thrust and its enough for me at 75kg. the spec states that it uses 3.-3.5 ltr per hour at around level flight (30kg thrust), so the motor i have if pretty much perfect for my weight, so either Do the specs lie ( are vittorazi actually in partnership with those sneaky german car manufacturers that manage to trick the world to believe there engine is more efficient). Am i using to much throttle, and by this i mean am i being inefficient in my throttle usage? (maybe climbing at full chat and then going to tick over) kind of like the way the way our mums would drive causing everyone in the car to suffer small scale whiplash ? Is my motor not really tuned? I have tuned the motor to where i believe it should be, the plug is a nice coffee colour with a very slight oil build up on the base just near the electrode, showing my oil mix and air to fuel mix is correct. (i also have an in flight tuning mod to the carb, which i have not used since i got the motor running smooth) B. I fly a 29 synth ( i know the thing is a boat, and last time i saw fabric that size i decided to leave the canadian girlfriend and head back to england) however i am in the correct weight range of the wing when taking into account the motor fuel reserve etc. would flying a smaller wing increase my fuel consumption as i will be flying faster ? or will it decrease as the newer wing would be more efficient (even though it would fly faster) Or is the fact that i shit myself on every launch the problem? does the shit hit my prob and disturb the airflow causing less thrust and making me use more throttle to fly and 3. going into wind. ok i understand this would slow me down, but it would also create more lift, therefore i would not need as much throttle to maintain a steady flight. going with the wind would give me more speed but i would need more throttle to maintain height and this is where litres per (distance) would come into play so i will post my flight details below and look forward to hearing some answers back, (i don't mind having a laugh and reading some hilarious answers but some sensible ones would be great to please Flight location oh fuck .... here we go.... (sorry guys) Parafest.........(i know, i know, but in my defence i wasn't made aware of the summer fly in rsvp so i missed out) wind speed 2kph On ground around 12-15 kph in air air temp 12 but i was freezing my tits off up there distance traveled 36 km fuel used 5.5 - 5.75 litres max engine temp 120 - 125 max height 2028 feet so whats the conclusion here. am i just a fat fucker, is my motor letting me down or do i need a new wing look forward to the opinions of others and and Paul ....... no talk about your bailey please Lol Quote Link to comment Share on other sites More sharing options...
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