Author Topic: EVO 7-77 Seven Cylinder Radial  (Read 433 times)

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Offline 660magnum

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EVO 7-77 Seven Cylinder Radial
« on: October 14, 2013, 01:29:46 am »
He's running it on Methanol/Synthetic lubricant/Nitro but the engine will also run on 20:1 gasoline and synthetic lubricant.

It has a CD ignition with a single 28 degrees BTC sensor with a PIC chip to program the retard for start and the timed sequence for the other six cylinders besides the master cylinder. It uses seven coils and high voltage lines and 1/4" X 32 spark plugs.

The primary voltage is set up to be 12V on LiPo batteries. This guy makes these ignitions. CH Ignitions  http://ch-ignitions.com/

77cc 6000 rpm looked like a 26 X 10 prop. Looks like a very reliable idle at 1500 but he had it going at 1000. He says it runs 5500 on gasoline with that prop.

https://www.dropbox.com/s/qniseyrprig6hwi/Evo%207-77%20Glow%20.mp4
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Offline 3000 FPS

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Re: EVO 7-77 Seven Cylinder Radial
« Reply #1 on: December 20, 2013, 09:37:17 pm »

Wow.   That is really something.   Makes those chainsaw engines look pretty simplistic.
PP 505, 475, 445.

Offline KilliansRedLeo

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Re: EVO 7-77 Seven Cylinder Radial
« Reply #2 on: December 21, 2013, 01:57:16 pm »
I'd say! Amazes me that people just go out and build these things! And your right makes chainsaw engines look crude by comparison!
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Offline Cut4fun .

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Re: EVO 7-77 Seven Cylinder Radial
« Reply #3 on: December 21, 2013, 02:21:40 pm »
 :o :o
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