Originally Posted by
Cary
Just some thoughts to throw into the discussion.
First, if hand-propping is the only thing available, LEARN HOW TO DO IT RIGHT! Just because you saw how to do it on YouTube doesn't mean that you can do it yourself.
Second, if there is any way to start the engine other than hand-propping, use it. Even for experienced hand-proppers, it's a dangerous task. All you have to do is slip a little, or have the airplane jump the chocks or come untied, or whatever.
Third, don't be surprised if any engine can run much longer with the fuel selector off than what you've seen in this thread. Here's my own example: we were at Concord Airpark (2G1) in our Skylane (this was about 41 years ago). The airplane was parked on a slant, so I'd left the fuel selector off for several days to keep the fuel from flowing from one tank to the other and out the vent. We had loaded up, I had done the preflight (including turning the fuel selector on), and went into the office to obtain my clearance from Cleveland Center. I was given a void time of only 10 minutes, which should have been enough. But when I came out of the office, Wife 1 had unloaded the kids and dog again "for one last potty stop". I saw the fuel flowing out the vent, so I reached in and turned the selector off again and told everyone to hurry up. By the time we reloaded everyone, the void time was close to running out, so I was in a hurry--big mistake. I fired up, and we taxied the length of the runway (2100') to the run-up area, did the engine run-up, and took the runway for take off. I firewalled it, and we moved forward probably 50-100' before the engine suddenly died. I immediately realized that I had failed to turn the selector back on, but there wasn't sufficient runway after we rolled while I turned it back on, so we back taxied before trying again. How long did that take? Assume we taxied at 15 mph .4 miles, that's about 1 1/2 minutes. Add another half minute for the engine run-up. That's at least 2 minutes, in an engine that at idle drinks a lot more than the much smaller engines that have been discussed. In 2 minutes, a lot of havoc can occur.
FWIW, my view is that if hand-propping must be done, both the person swinging the prop and the person at the controls must be qualified, and they must go over the "signals" before anything is done. I don't care if the signals are non-standard, just so both know what each other means. If it has to be done alone, then both chocking and tying down is essential. Yeah, people do it without one or the other or sometimes both all the time, but that doesn't make it wise, or right, or safe.
Bottom line: props are dangerous, like loaded guns. Any time a prop is moved, it must be respected as something that might suddenly move more on its own. If it's going to be used to start the airplane, then every precaution must be taken, for the sake of the person swinging the prop and people and property nearby.
Cary