Yes Greg, Eric was a pretty great guy. He flew a decent airshow and had many fans. I know he is missed my many. Check out some of my other videos and you'll find his memorial video amoung them.
Actually it is because oil after running settles down into the lower cylinders. You pull the engine through several cycles to insure the lower cylinders do not hydraulic lock with oil. It would bend connecting rods if the engine fired and the lower cylinders had oil in them and they were on a compression stroke. If there is oil in there pulling the engine over slowly squeezes any oil out at a human RPM instead of slamming a piston into it at speed.
Not really smart either... It's an air starter system and you have a limited supply of air to work with; plus it still would hit an oil flooded cylinder with to much speed and force.
So on a larger aircraft like say a B25, is part of the starting where it seems to turn so slowly at first doing this automatically?
rustychrome 1 year ago
That plane used to belong to a good friend of mine Eric Beard who was killed flying cargo I've met him before he was a very nice man
Greg79376 2 years ago
Yes Greg, Eric was a pretty great guy. He flew a decent airshow and had many fans. I know he is missed my many. Check out some of my other videos and you'll find his memorial video amoung them.
R1Kyle 2 years ago
I will look for it
Greg79376 1 year ago
Great vid! Why is a pull through required on a radial before fire? I am not a pilot, so please forgive my ignorance. Is it for oil distribution?
tsal01570 3 years ago
Actually it is because oil after running settles down into the lower cylinders. You pull the engine through several cycles to insure the lower cylinders do not hydraulic lock with oil. It would bend connecting rods if the engine fired and the lower cylinders had oil in them and they were on a compression stroke. If there is oil in there pulling the engine over slowly squeezes any oil out at a human RPM instead of slamming a piston into it at speed.
R1Kyle 3 years ago
Thanks, makes sense.
tsal01570 3 years ago
Could you just turn the mags off and use the starter to pull it through instead of your hands? then after 720 degrees just flip the mags on.
aegismachina 3 years ago
Not really smart either... It's an air starter system and you have a limited supply of air to work with; plus it still would hit an oil flooded cylinder with to much speed and force.
R1Kyle 3 years ago
thats i belive the only one in america
IflyN38PA 4 years ago