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Conference vmszoo::rc

Title:Welcome To The Radio Control Conference
Notice:dir's in 11, who's who in 4, sales in 6, auctions 19
Moderator:VMSSG::FRIEDRICHS
Created:Tue Jan 13 1987
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1706
Total number of notes:27193

92.0. "starting an inverted engine" by PNO::CASEYA (THE DESERT RAT (I-RC-AV8)) Wed Feb 22 1989 12:52

    Eric,
    
    I agree with you regarding flipping the airplane over making it
    easier to start an inverted engine.  However, I find the extra handling
    required to be a hassle, not to mention presenting a higher potential
    for damaging the aircraft or MUCH worse, causing injury to someone.
    
    Besides, when's the last time anyone saw a full-scale being flipped
    upside-down to start?  In the scale area, at least, I think it looks
    unrealistic/unprofessional to go through this drill so I prefer
    to start while the ship is sitting "on its feet."  Inverted starts
    are really quite easy once the technique is learned.  The first
    priority is NOT to flood the engine while fueling; this I've seen
    to by using a Robart ultra-fueler which cuts off the path to the
    carb while fueling and by using a one-way check valve in the muffler
    pressure line to prevent the over-flow from running back into the
    header pipe, thence into the cylinder via the exhaust port.  Once
    fueled, I simply close the throttle AND trim to full low and prop
    by hand 'til the engine fires (usually half a dozen flips or so.
    Then, I set the trim to the flight position and open the throttle
    about two clicks; the engine normally starts on the very next flip.
    
    Should the engine flood despite all my precautions, I connect the
    glo-driver, open the throttle and use the electric starter in short
    bursts 'til the engine starts.  THIS is where the glo-driver is
    vital as it'll help burn out the flood where a normal glo-battery
    will not.    

      |
      | |      00	 Adios,      Al
    |_|_|      ( >o
      |    Z__(O_\_	(The Desert Rat)

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92.1WHAT WAY WORKS?AVANT::DEANFri Feb 24 1989 15:4210
    What's the best way to start an engine (NOT INVERTED)?
    
    I have heard a lot of different ideas from people but would appreciate
    some inputs from the pros.
    
    Problems I have found is first the power source. This becomes a
    matter of reliability. To much voltage or current burns out the
    plug. Not enought of each and the plug doesn't heat up enought leading
    to flooding.
    
92.2That's religion!CURIE::ANKERAnker Berg-SonneFri Feb 24 1989 16:0858
        Re:< Note 899.10 by AVANT::DEAN >

                You may as well ask: Which is the best religion?
        
                Actually its  almost  the same question.  Engine starting
        rituals are as personal as anything religion.
        
                That doesn't mean we can't have a fun discussion, so I'll
        give me my 2 centr worth:
        
                I have found the  new  Ni-Starter  to  be  as  reliable a
        glow-plug driver as you can find.  It HAS to be the new ones with
        the steel tube.  The old  ones  can  shake off the plug and cause
        serious injury as it falls into the prop.
        
                Two strokes and four strokes are started differently:
        
                I  start  two  strokes  by  first priming  them  at  full
        throttle with the glow plug OFF and a  finger  covering the carb.
        All  it  takes  is about three flips after fuel  starts  flowing.
        Then a flip or two without the finger on the carb.  THEN I sttach
        the  glow  plug and take the throttle down close to idle.    Some
        engines like full idle, others more throttle.  You simply have to
        get to  understand what your engine wants, Next you flip the prop
        with a chicken  stick,  a  heavily  gloved  finger or an electric
        starter and the thing  fires  up.   If it is less than 20 degrees
        there's  a  99% chance it  will  be  running  backwards.    I  do
        something you should NEVER do to get it running the right way.  I
        throttle back to very slow idle and  slow  the  engine  a  bit by
        holding the spinner.  Just abover stalling RPM  the  engine  will
        kick  around  the  other  way  and  start running perfectly.    A
        preferable way is to flip the prop in the reverse  direction whan
        it is cold.  It will probably start the right way.  Preferable is
        to use an electric starter when its cold.
        
                For four stokes I chose one of two methods.  The lazy one
        is  to  open the throttle about 1/4 and crank it with an electric
        starter until  it  fires  up.   Of course the glow plug has to be
        attached.  The  other  method  is  to prime the engine as the two
        strokes, then attach the  glow  plug,  set  the  throttle  at the
        engine's preferential setting and finally  flipping  the prop the
        reverse direction into the compression point.   DON'T try to flip
        it through the compression, just into it.  Also make sure you are
        adequately protected.  Many four strokes need a bit of warming up
        before you can detach the glow plug and throttle back to idle.
        
                Everybody else starts differently, lets hear!
        
                      _ 
                     / |
        |  _====____/==|
        |-/____________|
        |    |        o \
             O           \ 
                          O
         Hang in there! o_|_
                          |
             Anker      \_|_/
92.3More ReligionLEDS::WATTThu Mar 02 1989 16:2422
    I ran into some problems starting my OS 1.2 4-stroke which is mounted
    upright in my Super Sportster 90.  The problem is that the choke
    will not pull fuel up to the intake valve because it is up hill
    an inch or so.  The fuel just falls out of the carb intake when
    you release the choke.  This started a fire once when the engine
    backfired through the carb.  The solution was to prime it through
    the exhaust with a squirt of fuel. (Glow driver removed)  I then
    turn it over backwards to pull the fuel into the cylinder, attach
    the glow driver, and flip it forwards.  (I don't usually have a
    starter)  A glove is advised with this mother.  Before I learned
    to prime it through the exhaust, I had a hard time starting it but
    now it starts easily.  By the way, the choke on my OS91 works fine
    with the engine mounted sideways since the fuel doesn't fall out
    and gets pulled into the intake.
    	Anker's 2-stroke technique is identical to mine.  I have found
    that 40 degrees is about the coldest that my 2-strokes will start
    easily without a starter.  The trick is to get plenty of fuel into
    them.  Methanol does not vaporize well in cold weather which makes
    starting more difficult.  
    
    Charlie