Author Topic: Rockerblock I.C.--Something a little different-  (Read 45225 times)

Offline Brian Rupnow

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Rockerblock I.C.--Something a little different-
« on: April 07, 2017, 02:12:23 AM »
And I do mean different. I want to machine something---but--Something I haven't seen or done before. This is destined to become a water-jacketed engine, 1" bore x 1.125" stroke. I have been casting around for something new to build, and I thought this up last night while fighting off my insomnia. A couple of hours spent on the CAD system this evening just to see if it could be done, and yes, it can. There will probably be many redesigns and changes along the way, but basically this is the overall framework I will stick to.

Offline crueby

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Re: Rockerblock I.C.--Something a little different-
« Reply #1 on: April 07, 2017, 02:18:11 AM »
Looks interesting! Will it have another rocker on the right side for the valve movement?




Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #2 on: April 07, 2017, 02:28:09 AM »
And yes, I'm even toying with the idea of water-jet cut flywheels. Crueby--I don't know yet.

Offline 10KPete

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Re: Rockerblock I.C.--Something a little different-
« Reply #3 on: April 07, 2017, 02:33:10 AM »
Looking forward to this one, Brian. It will be a wonderful change from the usual 'practical' engine. This one is for fun!!

Pete
Craftsman, Tinkerer, Curious Person.
Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Offline billmac

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Re: Rockerblock I.C.--Something a little different-
« Reply #4 on: April 07, 2017, 03:41:03 PM »
You are  halfway to making a Commer 'knocker'  or TS3 - why not go the whole way and make a model of a really unique design. See:
https://en.wikipedia.org/wiki/Commer_TS3

http://www.oldengine.org/members/diesel/rootes-listerts3/ts3.htm

<a href="https://www.youtube.com/watch?v=e0sLp7wvq60" target="_blank">http://www.youtube.com/watch?v=e0sLp7wvq60</a>

A really interesting sound and a smooth running engine.


Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #5 on: April 07, 2017, 04:08:38 PM »
Well Sir, This is getting exciting. I love it when a plan begins to come together.


Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #6 on: April 07, 2017, 04:10:25 PM »
You are  halfway to making a Commer 'knocker'  or TS3 - why not go the whole way and make a model of a really unique design. See:
https://en.wikipedia.org/wiki/Commer_TS3

http://www.oldengine.org/members/diesel/rootes-listerts3/ts3.htm

<a href="https://www.youtube.com/watch?v=e0sLp7wvq60" target="_blank">http://www.youtube.com/watch?v=e0sLp7wvq60</a>

A really interesting sound and a smooth running engine.
You're about 4 years too late for that. I built that engine and posted it years ago.---Brian
http://bbs.homeshopmachinist.net/threads/61789-A-different-opposed-piston-engine?highlight=OPPOSED+PISTON

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #7 on: April 07, 2017, 06:02:50 PM »
Now my engine can breath in and breath out. Another hours work and it will have ignition.--And yes, it does even have pushrods.--Little short ones at that, with little swivels where they attach to the rockers to take out any binding.

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #8 on: April 07, 2017, 06:53:18 PM »
I almost got caught. Look at the creative carving I had to do on the bottom of that water jacket to clear the revolving crankshaft.

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #9 on: April 07, 2017, 07:17:07 PM »
 Speaking of the water jacket, my plan for sealing the jacket to the o.d. of the cylinder is shown in this section view of the water jacket. An annular groove cut at each end, just slightly shallower than the cross sectional thickness of a .094 Viton o-ring. Hopefully an o-ring in each groove will seal any water leaks. I will be able to get two or three bolts thru from the flange on the cylinder  into one end of the water jacket to keep it from turning on the cylinder.

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #10 on: April 07, 2017, 07:34:02 PM »
Well Hot-Dog!! I even managed to sneak an ignition cam and my old stand by Chrysler ignition points in behind the offside flywheel.

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #11 on: April 07, 2017, 07:51:06 PM »
There. That's a solid 8 hours playing. I have to dwell a bit on whether or not I have the crankshaft counterbalances on the correct side of the crankshaft or not, but other than that and a gas tank, the engine design/modelling is finished. Now I have to go shovel out the end of the driveway. We got 5" of April Fools last night. Yuk!! I was hoping we were done with that white stuff!!

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #12 on: April 07, 2017, 09:37:23 PM »
I always think it sucks to design a nicely proportioned engine, and then stick a gas tank on it. Gas tanks don't leave you with a whole lot of options. They have to be near the carburetor, they have to set below the carburetor throat (but not too far below), they shouldn't block any other equipment which needs frequent adjusting, and they shouldn't be directly in line with the exhaust. That being said, you just do the best you can and hope it doesn't ugly things up too much. This is not an improvement over the normally configured gas engine. It's just a different, artsy fartsy way of doing it.

Offline Brian Rupnow

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Re: Rockerblock I.C.--Something a little different-
« Reply #13 on: April 08, 2017, 01:44:05 AM »
I ended up having to angle both the exhaust and the carburetor out 12 degrees from centerline to clear the gas tank. I could have squeaked by with leaving them "in line" but it would have been severely crowded, and since I have to make the yellow "elbows" anyways, I might as well do this and buy a bit of room.

Offline crueby

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Re: Rockerblock I.C.--Something a little different-
« Reply #14 on: April 08, 2017, 01:53:28 AM »
Nice proportions and shape. Just needs some Victorian style flourishes, scrollwork and beaded edges.
 :popcorn:

 

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