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Messages - multis6

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Everything else / Re: Air Motor Starters
« on: November 08, 2021, 10:07:47 AM »
I have a Metro 12/2 and have tried to add an air motor to assist on starting. The motor in the photos is a used motor but still serviceable. I had set it up so that the motor was hinged so that lifting the rear of the set up with a 2x4 would engage the motor wheel to the flywheel. With the set up seen the air motor was not strong enough at 100lbs air pressure to turn the 12/2 over. I had high hopes that this would help my aging back, but not so.   

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Listeroid Engines / Re: 12-2 Air over Start
« on: August 06, 2019, 11:31:04 AM »
Yes the intake on the one head is different than the original configuration ( I'll just extend the intake out a bit to accommodate an air filter.) but what's really WRONG is the cooling ports. They used the same head on both cylinders and the piping needed to be reduced in size due to the lack of room on the side of one of the heads, so the out flow is restricted to make the piping fit in to the space. There is no way that the engine would run on convection cooling, so I needed to install a coolant pump to push enough coolant through the engine to pull off the BTUs Not sure if it will actually cool sufficiently at full rated load. I have not hooked up an 8K load bank to or dino to make it work at max power for a period of time.

I see that McMaster has the rollers needed for the air motor that's a help now to find one that has a good grip. One draw back of the air start system is the size of the receivers (air tanks) needed to hold a starting charge. But its a one time expense in dose not need to be replaced every 6yrs like batteries. Just need to find the room for tanks.

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Listeroid Engines / Re: 12-2 Air over Start
« on: August 05, 2019, 11:59:49 AM »
FYI:   Here is my 12-2 Metro with the Gast motor set and ready to be plumbed.

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Listeroid Engines / Re: 12-2 Air over Start
« on: August 05, 2019, 11:08:52 AM »
Well this is the 3ed time trying to get a reply out......
Bruce it sounds & looks like you have spent quite a bit of time and thought building your system. Well done & thanks for the pics.
It is interesting to see how individuals have taken the basic engine and adapted there own technologies to fit there needs.
Talk about basics...... I crank my 12-2 Metro 5 revolutions then stomp on a peddle to pull a string to swing the decompression lock out of the way, then on the 6th rev. I push it through the compression stroke and off it goes. So yes a more elegant starting method is due.
It looks like a bit more work with the Gast air motor (assist) will be the way to go for now.

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Listeroid Engines / Re: 12-2 Air over Start
« on: August 02, 2019, 12:10:27 PM »
Thank you for your input guys, I have a Gast 1550 air motor on my engine right now but the contact wheel is too large and it will not turn over the engine. I need to get a smaller and softer wheel to get the ratio correct.
 
I have worked with a 1 megawatt genset that had a 8 cylinder tug boat engine on it with an air start system.
It was the neatest thing to see it start. Flip the switch and the unit would crank over then fire up, with in 10 seconds it was producing power. As you said BruceM "It would be technically challenging, and a cool retro-engineering project." It is interesting to ruminate over the possibility of doing such a project.

Bruce the system that you have set up sounds interesting, Do you have any pics. that you could share to see how you have it set up? What size engine are you starting?

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Listeroid Engines / 12-2 Air over Start
« on: August 01, 2019, 10:16:47 AM »
 I have a Metro 12-2. that has become heaver to start each passing year (or I'm getting older).  Has any one set up there machine to start with air over the top of the piston to roll it over and get it started?
I have done a search but have not sorted through the 1000+ postings offered. 

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