Blackgates V twin oscillating engine

**thehomeengineer** · Mar 24, 2021, 07:26 AM

Hi All

Been up against it trying to get this little engine finished for my sons 21st birthday present on the 26th March as I only started it a couple of weeks ago.

But it is almost there with just a few things to do/make: gaskets, cylinder bore porting, unions and plumbing, wooden mounting base and painting.

I have ordered the 8BA screws and waiting for them to arrive and need to find two compression springs. I am also going to add a reversing valve.

Here are a few photos of the engine

Blackgates V twin oscillating engine-img_6298-v-twin1.jpg

Engine has since had input, exhaust ports and the cross port plug holes tapped.

Blackgates V twin oscillating engine-img_6299-v-twin2.jpg

Blackgates V twin oscillating engine-img_6300-v-twin-3.jpg

Thank you for viewing
The Home Engineer

**thehomeengineer** · Mar 25, 2021, 09:07 AM

So the cylinder covers don't cover the steam passageways to the bore the following setup was used to machine a groove to overcome this.

Blackgates V twin oscillating engine-v-twin-7.jpg

jig and associated bits to set the cylinder at the required angle for machining.

Blackgates V twin oscillating engine-v-twin-5.jpg

setting the cylinder block with a square

Blackgates V twin oscillating engine-v-twin-9.jpg

setup held in machine vice and a vice stop used for repeatability.

Blackgates V twin oscillating engine-v-twin-8.jpg

one completed groove (three more to cut)

Blackgates V twin oscillating engine-v-twin-6.jpg

completed cylinders ready for gaskets and covers.

Thank you for viewing
The Home Engineer

**thehomeengineer** · Mar 26, 2021, 04:18 AM

Unfortunately didn't get it ready for my sons birthday which is disappointing. But assembled the parts so the crank could turn over by hand. To complete the engine is cylinder gaskets, plumbing, mounting board and painting. The photos below show the engine as given to my son this morning (26/03/2021)