bogusbandit56
I found this interesting video on You Tube, well I thought it was interesting.
Some of the largest piston engines built for aircraft.
You will notice the large radials take some time to start and smoke badly.
This is due to oil pooling in the lower cylinders after standing as oil creeps past the piston rings.
Wot, no Depron?
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whatmovesyou
To contribute a little more, the reason the blades turned slow is to insure that the oil that leaks past the rings does not cause a hydraulic lock. It it does, it will blow the cylinder off the block causing an engine removal. It happened in our squadron.

I started as a engine mechanic and moved up to flight engineer accumulating over 1400 of flight time searching for Russian subs and had over a 100 hours of actual flight time (pilots get bored when you fly for 13+ hrs) and lost track of how many times I started our 3350's . Miss the smell of high octane as it starts. Had the fun of starting our J-34 jet engines as well.



This is the coolist that you can do. Taking off at nighttime and flying out to sea with no lights on, you feel like you are flying thru the universe with the stars.

I like to design and fly unique planes.
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bogusbandit56
Quote:
To contribute a little more, the reason the blades turned slow is to insure that the oil that leaks past the rings does not cause a hydraulic lock. It it does, it will blow the cylinder off the block causing an engine removal. It happened in our squadron.

I started as a engine mechanic and moved up to flight engineer accumulating over 1400 of flight time searching for Russian subs and had over a 100 hours of actual flight time (pilots get bored when you fly for 13+ hrs) and lost track of how many times I started our 3350's . Miss the smell of high octane as it starts. Had the fun of starting our J-34 jet engines as well.



This is the coolist that you can do. Taking off at nighttime and flying out to sea with no lights on, you feel like you are flying thru the universe with the stars.


Thanks for posting these videos. The Neptune flight was brilliant, what a view!
On the smaller radials didn`t the ground crew turn them over by hand to check for hydraulic lock?
These radials remind me of my old diesel van, it smokes on start up but clears in a few minutes, but I think the oil is getting past the valve stem seals.
On the earlier British jets they had cartridge starters and the black smoke could been seen for miles, they make a very interesting noise as well.
Wot, no Depron?
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