100% FREE ONLINE DATING
sponsored links
Previous
| Topic: Johnny Popper | |
|---|---|
|
|
|
Is any one familiar with this term, it's a nickname.
And No, it's not a reference to the infamous Mr. "Johnson", or "pop goes the weasel". |
|
|
|
|
|
|
|
|
It vaguely sounds familiar but I can't place it
|
|
|
|
|
|
|
|
|
I'm guessing that only a few are familiar with it.
hint: second profile pic. But why the nickname? |
|
|
|
|
|
|
|
|
Hmmm... because it pops seeds?
|
|
|
|
|
|
|
|
|
Nope, but it could be used to pull a seed planter.
|
|
|
|
|
|
|
|
|
I think it's just a rouse to get women to look at your profile
I'm assuming it's a John Deere? If so, that's where Johnny comes in. Haven't a clue about popper 
|
|
|
|
|
|
|
|
|
Yes, the "Johnny" comes from John Deere.
Moto, PW, Slim, might know. |
|
|
|
|
|
|
|
two-cylinder design made a distinctive sound that gave these tractors the nickname “Johnny Poppers.”
google is your friend |
|
|
|
|
|
|
Edited by
Unknow
on
Sat 08/05/23 05:44 PM
|
|
Yes that is correct.... Google cheat
 .
So why do they make the particular sound? It's because, 2 cylinder, 4 cycle,.....??? Google may not be so friendly with specific technical questions. |
|
|
|
|
|
Edited by
NotPay4Play
on
Sat 08/05/23 08:26 PM
|
|
Or as I have heard it since I eas a kid "popping johny" precisely I wouldn't know. I would figure it could be a little back pressure by the off set of the timing. Kinda along the lines of the older harleys sounding at idle due to the twin carbs.
|
|
|
|
|
|
|
|
|
I don't think Harleys ever had twin carbs. The reason they sound the way they do at idle is because of the way the crank shafts and firing order are set up.
And I would say that the "Popping Johnny" was a four stroke and "Popped" for the same reason a "hit and miss" engine does. |
|
|
|
|
|
|
|
|
On 4cycle engines, it requires two full rotations of the crankshaft, 720°, to fire the cylinders, regardless of the number of cylinders. For a smooth running engine, the cylinders would fire equal degrees of rotation. 360° for 2 cyl, 180° for 4 cyl, 120° for 6 cyl, 90° for 8 cylinders.
The Johnny Popper cylinders fire somewhere around 3 1/2 ° apart, the old Harley engines are similar in that respect. When the cylinders fire that close, you hear "pop pop", delay of 716 1/2 ° crank rotation, then another "pop pop". |
|
|
|
|
|
|
|
|
I could be wrong on the 3 1/2°, been a long time since I've dealt with them, but for certain the cylinders fire very close together.
|
|
|
|
|
|
|
Edited by
Unknow
on
Sun 08/06/23 12:30 AM
|
|
Dheere Dheer $e
  
___  .............
|
|
|
|
|
|
|
|
What lovely pics those are Robin...
In our little goat herder village in India, some farmers are still using bullocks cos they can't afford a tractor... The goat herder inside me, wishes I had a tractor ...
I'd tractor around all the fields  and chase the birds  🤣
|
|
|
|
|
|
|
|
|
On 4cycle engines, it requires two full rotations of the crankshaft, 720°, to fire the cylinders, regardless of the number of cylinders. For a smooth running engine, the cylinders would fire equal degrees of rotation. 360° for 2 cyl, 180° for 4 cyl, 120° for 6 cyl, 90° for 8 cylinders. The Johnny Popper cylinders fire somewhere around 3 1/2 ° apart, the old Harley engines are similar in that respect. When the cylinders fire that close, you hear "pop pop", delay of 716 1/2 ° crank rotation, then another "pop pop". What about what's known as a "flat crank" as used in racing engines? V8 engines vs straight 8s? v6 vs straight 6 etc. Flat opposed cyl engines like old VWs or BMW bikes? |
|
|
|
|
|
|
|
|
When one piston is at Top Dead Center and the other is 180° opposite at Bottom Dead Center, the pop pop pop pop you hear from a Johnny Popper is NOT left firing POP and right firing POP 180° later, the POP the human ear can recognize is the COMBINATION/ADDITION of BOTH firings (a quick 180° apart) followed by the relatively longer 540° coast cycle before the ear detects another POP. You don't hear POP POP then ---- ---- ---- (540°).
|
|
|
|
|
|
|
|
What lovely pics those are Robin... In our little goat herder village in India, some farmers are still using bullocks cos they can't afford a tractor... The goat herder inside me, wishes I had a tractor ...
I'd tractor around all the fields and chase the birds 🤣
|
|
|
|
|
|
|
|
|
hello
|
|
|
|
|
|
|
|
|
On 4cycle engines, it requires two full rotations of the crankshaft, 720°, to fire the cylinders, regardless of the number of cylinders. For a smooth running engine, the cylinders would fire equal degrees of rotation. 360° for 2 cyl, 180° for 4 cyl, 120° for 6 cyl, 90° for 8 cylinders. The Johnny Popper cylinders fire somewhere around 3 1/2 ° apart, the old Harley engines are similar in that respect. When the cylinders fire that close, you hear "pop pop", delay of 716 1/2 ° crank rotation, then another "pop pop". What about what's known as a "flat crank" as used in racing engines? V8 engines vs straight 8s? v6 vs straight 6 etc.Most engine designs follow the 720° divided by the number of cylinders. There are exceptions, the 1975 to 1977 Buick 231 v-6 was called an odd fire engine 120,90,150,120,90,150.That was due to the 90° block and opposing cylinders shared a crankshaft rod journal. 1978 and newer versions had individual rod journals, to get an even firing of 120°. GM & Ford inline 6, are even fire, guessing straight eights are even firing, oppoing cylinder engines (VW, Porsche, Corvair)... don't know. Flat opposed cyl engines like old VWs or BMW bikes? |
|
|
|
|
