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Old 5th Feb 2012, 12:42
  #29 (permalink)  
mikehallam
 
Join Date: Dec 2005
Location: West Sussex, England
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Rotax including the 80 & 100 & 115 h.p flat fours have kill switches but no lean cut & even if the start/ 'ignition key' is off or removed/not inserted - not mentioned yet above - it could still fire if these are not shut !
So do their very useful two strokes.
Rotating the prop at hand speed turns the engine's crankshaft some 2 1/2+ time faster & energises the spark coils etc.
There is somewhere a report of a well experienced UK pilot accidentally starting a Rotax that way.

As written above, never trust a prop. - it's best to think of it always 'live'.
And on a tail wheel a/c though the top arc where one grabs it is away from you the six-a-clock position is a lot closer to your knees.
BTW One handed, if propping for a start, is the normal way, your other arm held firmly behind your back. Always train yourself to access the cockpit ignition/throttle controls by going round the wing tip, never lean straight across to reach inside, even if it hasn't fired - or one day it'll be your final move

Hand cranking is never the less a very normal pre-flight procedure to check compressions and that it turns freely. Rotax require it at least on the 80 h.p. model as it uses the crankcase blow by to return oil to the separate tank. Then one can do a proper oil level check on pre-flight.

Pulling the a/c out is also normal by pulling with both hands on the prop. close to the hub.

mike hallam.
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