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spacesailor

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Posts posted by spacesailor

  1.     Skippydiesel

     

       "Well Jaba lets deal with a fact or two -

     

        My Rotax 912 ULS contains 3 L of oil, which I change at 50 hr intervals. I have never had to add oil between services in its 850 + hours to date.

     

        It uses about 12 L /hr @ 100 knots, can loiter at 60 knots consuming about 8 L/hr and if I ask it, it will do 120 knots on about 17 L/hr. It prefers ULP but at a pinch can dine on AvGas.

     

        It is smooth running and quiet (compared with even a lawn mower, let alone almost every other aircraft engine).

     

        Its seems to deliver power without effort, from sea level to 10,000 ft (my legal limit).

     

        I did have to replace the "sprag clutch" probably from using under-powered battery's but other than this the engine has never been opened and only routine service items replaced.

     

        I expect it to be still motivating my aircraft at 2000 + hrs.  "on condition"

     

       Thats good

     

        How about

     

       500 ml oil.

     

       6 litres an hour fuel consumption, at 100 mmph, VNE 140. (in a dive)

     

       SHAKIEST of all the motors.

     

       All of 35 HP (Hand-cranked ).

     

    spacesailor

     

    61mpg.jpg.974b6c862f4b5801bd549d1754033c17.jpg

     

     

  2. The question read "what causes icing"

     

    Kununurra Is correct, !

     

    I had read CASA's definition, which said

     

    "Carburettor icing is of particular concern because, unlike airframe icing, the risk of ice build-up in the carburettor can be high even with no visible moisture and an OAT of up to 38°C.

     

    Carburettor icing occurs when the air temperature adiabatically decreases sufficiently to condense water vapour and for the localised air temperature to reduce below freezing. Ice builds up as the chilled condensed water makes contact with localised surfaces, such as the butterfly valve and the venturi walls. Carburettors experience additional cooling because of the evaporation of fuel. Furthermore, the risk of carburettor icing is significantly increased at partial power settings (for example, when power is reduced during descent), because of the cooling effect of a partly-closed throttle."

     

    The answer given was simply :Moisture causes icing:

     

    Pity Darwin with super high moisture.

     

    but

     

    Great flying in Mcmurdo dry valley antarctica, if your fuel is still a liquid.

     

    adiabatically ? I wonder what the bureaucrats mean.

     

    spacesailor

     

     

  3. OR the little admired "HIRTH"

     

    " The Hirth 3002, 80 HP, and 3003, 110 HP engines are unique in the industry. The are a four cylinder horizontally opposed air cooled engines. The 3002 is tuned for high torque, low rpm, and the 3003 is tuned for high horsepower. These engines are a great alternative to the Rotax 912 series engine"

     

    Just googled & copied.

     

    spacesailor

     

     

  4. "Carburettor icing is more likely at partial power settings because of the cooling effect of a partly-closed throttle butterfly."

     

    from CASA web site.

     

    That's the spelling I took for,: ICING .

     

    spacesailor

     

     

  5. " In business digital ensures you are paying the correct price for the correct item; mistakes are eliminated "

     

    You Have to be joking, some poor sods are looking at million dollar bills, with just a missing digit or dot, or even an extra three zero's.

     

    Machines Don't come up without a Person entering DATA.

     

    But machine Do go wrong, and "stuff-up" the end result !.

     

    Funny they (who ever|) picked tens, when computers run on "bits" that are Not ten based.

     

    spacesailor

     

     

  6. You may be right

     

    but

     

    the bigger the equipment is, the bigger the DOLLAR sign.  ( never saw a High pressure rail like: ( 77 gallons per minute through a 2.5"diameter fuel line). that's about 10 times my 4 litre engine High-pressure rail.

     

    77gal=291.477 litres: That wont fit through my high-pressure motor system. It wont even fit my fuel tank. LoL

     

    spacesailor

     

     

  7. EFI

     

    It has a limited fuel flow-through,

     

    At 20 litres an hour most auto types would be past their capacity.

     

    Big bore drag cars use carburetors to get the fuel "hundreds of litres per run" (650L,P,H,) to make their crazy horse-power.

     

    " Under full throttle a modern top fuel dragster engine burns approx.11 gallons of fuel a minute. The fuel pump is capable of delivering 77 gallons per minute through a 2.5"diameter fuel line.

     

    The fuel tank holds 17 gallons of fuel. A 55-gallon drum of nitromethane today costs about $900. "

     

    Just a quick check, !

     

    spacesailor

     

     

  8. I couldn't find the right place to put this little item !.

     

    Some-one with size Thirteen shoes wants a small aircraft,

     

    I can't see any manufacture Other than Hummel saying "We can alter the rudder peddles to suit your shoe & get the Toe-brakes onto the ball of your foot,"

     

    sounds like they keep their customers happy.

     

    spacesailor

     

     

  9. " He then pointed out that I was, in fact, flying at the wrong height for my direction, which I guess I was, however as I was on descent into the airfield and had indicated such.I told him I felt that his lack of radio usage was of more a concern, because he knew where we were, but we had no idea he was even in the air anywhere near us.He had made no calls either on landing or take off other than the garbled message we had heard as he approached.Far be it for me to criticise others. I have only about 130 hours flying time and I know I still make mistakes and have a lot to learn. But I do know that for every pilot to be safe in the air (and my instructor drummed this into me), not only do you need to know where I am and what I am doing, but letting me know where you are and what your intentions are - especially when we are in the same airspace - will make a huge difference to all concerned It’s common courtesy"

     

    Exert from Sport pilot.

     

    Say's lots in a small paragraph.

     

    I was told to make my intentions known !.

     

    spacesailor

     

     

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