Above post surely takes the record for resurrected threads, nevertheless, all pertinent and a timely reminder.
the report synopsis gave me a queasy stomach
One has to have sympathy for the poor trainee,watching his/her instructor do something so damned stupid,
complacency kills
Our banned colleague was pretty adamant about priming and accelerator-pumps.
some aircraft have a syringe-type primer so it squirts a neat slug of fuel into the induction tract. With a side-or down draught carburettor, Prime-fuel will invariably puddle in the inlet manifold Induction air will pass across it's surface and so become enrichened.....in a tail-dragger, it's likely to run towards the lower cylinders and trickle in when the inlet-valve opens...under those (flooding) circumstances, it is likely to wash oil off the cylinder-walls(simply replaced by the oil-scraper rings on the piston, next time it comes up the bore!)
So, pretty much a non-issue unless your starts are frequent and your runs brief,
Accelerator-pump.....not necessarily atomised, often a jet squirting into the venturi of the carb,and relies in the induction-air to atomise it and carry it into the cylinders.....again, dodgy on a stationary updraught carb, but a quick and effective prime on side and down-draught types.
KNOW YOUR ENGINE! English PPL syllabus requires a good comprehension of engine mechanicals and operation....build on that foundation and you can save a lot of heartache, wear and tear and cash..
An aside- Old Rolls Royce cars had both coil and magneto ignition.
It was possible to stop them with the ignition fully retarded.....return to vehicle, switch on ignition, set hand-throttle and mixture(quadrants on steering-wheel hub) then sweep the ignition A-R lever (also in the middle of the steering wheel !) towards the Advance and the engine would magically burst into life
A six, or eight-cylinder engine, which has been stopped by ignition-switch and NOT by fuel-cutoff, will invariably have one cylinder with mixture and piston in the correct position to ensure this happens.....
remember , in the case of an older aircraft with Magneto ignition, the impulse -startboth retards , AND gives a "quick flick" to the mag. for a strong starting spark.
I've hand-propped a number of times...simple and safe if you follow the rules!