Great OLD PROPELLER Airplane Engines Cold Starting up and Heavy Sound 2 

That's unburnt fuel. You have to flood the heck out of them too get them to start

These vintage engines aren’t as tightly built as modern car and piston airplane engines are.

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​@michaelmurray7199 radial engines are piston engines....just sayn..byt you are correct the tolerances were much more relaxed then the tight tolerance of todays piston engines

Negative. It's oil that settles into the lower cylinders. Once it's burned off, the smoke stops!

Unless she’s a motorhead too, you’re probably sleeping on the couch for a while. LOL

Nope. She came downstairs barefoot, and said, "What was that?" "What was what, Honey."@@Subguy686

The propeller also acted as a load for the engine to turn against.

A flywheel to provide inertia to give smooth running off the master connecting rod.

I think the Packard was a RR Merlin built under licence

@@adrianwilliams763 The Packard 4M-2500 V-12 marine engines, were used in all U.S. PT boats during WW2. The 4M-2500 engine was a totally designed and built engine by Packard in the mid to late 1930's.The Packard built Merlin engines were know as the V-1650.

The P-51 used a variant of the Merlin. It was built as the Merlin 63 and was built by Packard motorcar company, the same Packard built Merlin saw service in trios of 3 in PT boats in the pacific. The V-1710 Allison engines didn’t get much service in Europe owing to fuel issues. British fuel was too low octane for the P-38 and many had issues until the widespread availability of US cooked up 130 octane fuel. Once they fixed it the P-38 came into its own but owing to an ineffective cockpit heater they were not well liked by pilots in the ETO ( European theater of operations). They offered pilots electricity heated powder blue flight suits to help but again was not popular. The PTO was where the P-38 came into its own as the great Charles A Lindbergh was working a a rep for Lockheed aircraft, he flew into combat and showed pilots how to pull the mixture back far enough to extend even farther the P-38s already significant range. 2 of the top scoring USAAF aces were PTO lightning pilots, Majors Tommy McGuire ( 38 victories prior to his crash and death) and Richard Bong ( 40 victories and he returned home only to be killed flying a P-80 shooting star prototype). The P-38 also holds the distinction of being the aircraft that ended the life of Adm. Isokrou Yammamoto ( who had he survived the war might have made a good history professor . Without the turbos the V-1710 was a low ti mid altitude engine at best as British Lightning 1s were normally aspirated and the RAF found issues with it. ( RAF designers were also the people who took a Mustang 1 ( Then the A-36 Apache dive bomber in us service)) and they fitted a 4 blade constant pitch propeller and a Merlin 61 for its better altitude performance. Upon its success they sent their findings back to North American aviation along with a production license for the RR Merlin, then another legend was born )