DiscussWorldIssues - Socio-Economic Religion and Political Uncensored Debate - View Single Post - Sparkplugs? PSH!! Plasma ignition is where its at!

**wCYvMKAc** · 08-19-2012, 07:57 AM

This is rather unlikely though.

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I highly doubt it will change anything in the manner suggested.

I don't know about that.

Think about this, a V6 running at 5000rpm, the duration of a single burn cycle will be like 1/4 of a cycle, and at 5000 rpm, and you'll be doing 2 cycles at a time, so 1/5000*3*0.25 = 0.00015 (15x10^-5) seconds. If ignition occurs over 1/4 of a 20cm cylinder, that's 5cm. At 5000ft/s (1524 m/s), the combustion will traverse the 5cm in 3.2x10^-5 seconds, which is about 1/5th of the duration of the single cycle, and seems about right, but also much faster than the pistol travels. Therefore, if you decreased the duration of the burn even by 50%, but kept the energy output the same, the pressure on the piston would be much higher. However, as the mass of the pistol is very large in comparison to the energy of a single ignition cycle, you won't be gaining much torque on the crankshaft over time, just instantaneous torque, which will increase wear but won't increase the output. The only engine where this would produce a substantial increase in power output would be a pulse-type rocket motor. I can totally see this decreasing emissions though.

08-19-2012, 07:57 AM	#8
wCYvMKAc Join Date Oct 2005 Posts 452 Senior Member	This is rather unlikely though. [/COLOR] I highly doubt it will change anything in the manner suggested. I don't know about that. Think about this, a V6 running at 5000rpm, the duration of a single burn cycle will be like 1/4 of a cycle, and at 5000 rpm, and you'll be doing 2 cycles at a time, so 1/500030.25 = 0.00015 (15x10^-5) seconds. If ignition occurs over 1/4 of a 20cm cylinder, that's 5cm. At 5000ft/s (1524 m/s), the combustion will traverse the 5cm in 3.2x10^-5 seconds, which is about 1/5th of the duration of the single cycle, and seems about right, but also much faster than the pistol travels. Therefore, if you decreased the duration of the burn even by 50%, but kept the energy output the same, the pressure on the piston would be much higher. However, as the mass of the pistol is very large in comparison to the energy of a single ignition cycle, you won't be gaining much torque on the crankshaft over time, just instantaneous torque, which will increase wear but won't increase the output. The only engine where this would produce a substantial increase in power output would be a pulse-type rocket motor. I can totally see this decreasing emissions though.
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