Author Topic: Big Marine Steam Engine (Read 108758 times)

doubleboost · « **on:** June 09, 2011, 05:24:19 PM »

You may remember the video i put up about casting a large steam engine cylinder.
Steady progress has been made machining it up.
Originaly i was going th build a mill engine but was talked around in to building a marine unit

Anyhow you like pictures

I will post some more later

sbwhart · « **Reply #1 on:** June 10, 2011, 01:23:14 AM »

Going well John

Where did the blood come from ?

Stew

Stilldrillin · « **Reply #2 on:** June 10, 2011, 02:17:28 AM »

Looking good John.

The spattered specs show just how much effort you've put in, so far........

David D

PekkaNF · « **Reply #3 on:** June 10, 2011, 03:16:13 AM »

That is pretty big.

Engine builders allways leave little on himself on every engine he builds: usually it is blood.

Pekka

doubleboost · « **Reply #4 on:** June 10, 2011, 06:13:56 PM »

Its not blood its red paint (mind you i have bled for this engine)
More pictures

Valve chest patern

doubleboost · « **Reply #5 on:** June 12, 2011, 01:13:03 PM »

Time for a crank shaft
I was going to build a disc type (nice and easy) then Rob Wilson recond a built up crank would be easy

The engine will have a 3.4 inch stroke so the crank will be a nice meaty job

The 2 webs were welded together then machined in to submission

A bit of en8 bar wea turned up for the big end 7/8 diamiter with 3/4 shoulders 3 thou interfierence fit in the webs

25 mm stainless bar for the mains this was turned between centers (my first attempt at this )_
Turned down to be a nice fit in the webs then a 3 thou press fit

Rob pressed the job together for me 10 ton was mentioned.

Just to make sure i welded it as well

Back between centers for a final clean up

Welding allowed me to put fillets on the webs

To say i am pleased with the finished job would be a understatement

Even took some video of it going around

Pattern for the base next (i hate wood work)

arnoldb · « **Reply #6 on:** June 12, 2011, 01:55:53 PM »

Good going John

- this is a nice BIG 'un

I love your drive dog

Regards, Arnold

sbwhart · « **Reply #7 on:** June 12, 2011, 02:15:20 PM »

Those glass drive dogs are top notch, where did you get them from John.

Stew

Bernd · « **Reply #8 on:** June 12, 2011, 02:22:08 PM »

That's going to be some monster of an engine.

Great work John.

Bernd

Brass_Machine · « **Reply #9 on:** June 12, 2011, 02:46:27 PM »

Gonna be a big one. Are you going to power anything with it?

Eric

doubleboost · « **Reply #10 on:** June 12, 2011, 03:28:15 PM »

I think i should make some drive dogs as i am now addicted to turning between centers.

The dog in the picture came with a toy tool set i had as a child

John

doubleboost · « **Reply #11 on:** June 16, 2011, 09:33:24 PM »

While thinking about a base for the engine (woodern pattern)

Deceded to make the piston

Thought about using O rings

hopefully this engine will see steam so proper piston rings it is

I would normally have pictures of the tempering process but the wife (wor lass) has taken my camera on holiday with her

.
At least i have a weak in the shop

doubleboost · « **Reply #12 on:** June 22, 2011, 05:43:26 PM »

Engine base casting

MDF pattern

Mould looking good

Happy with that

Troutsqueezer · « **Reply #13 on:** June 22, 2011, 06:48:32 PM »

I enjoy seeing your setups. Thanks for the pics.

doubleboost · « **Reply #14 on:** June 30, 2011, 05:59:12 PM »

Made some small patterns for the main bearing caps

Click the pictures

saw · « **Reply #15 on:** July 01, 2011, 05:04:14 AM »

This is a pice of art, good work

DaveH · « **Reply #16 on:** July 01, 2011, 08:25:25 AM »

Really good stuff

Excellent

DaveH

loco · « **Reply #17 on:** July 01, 2011, 08:28:15 AM »

So thats where my glasses went - the rose tinted ones
Pete

metalmad · « **Reply #18 on:** July 02, 2011, 07:07:37 AM »

Hi John
Looking great mate
being able to cast your engine blocks

PETE

PekkaNF · « **Reply #19 on:** July 02, 2011, 09:04:06 AM »

Wee wuu

What metal is that engine base and works? Looks really nice.

Pekka

doubleboost · « **Reply #20 on:** July 02, 2011, 06:09:50 PM »

The base is aluminium
The cylinder is bearing grade (alloybronze)
John

krv3000 · « **Reply #21 on:** July 02, 2011, 08:21:12 PM »

oooo brill work

cfellows · « **Reply #22 on:** July 02, 2011, 11:06:16 PM »

Nice work, John. I'm looking forward to watching the progress on this one.

Chuck

doubleboost · « **Reply #23 on:** July 20, 2011, 05:45:15 PM »

Hi
Got a little bit more done
I needed a lump of bronze flat bar 1 inch thick by 3 inches square for the big end
It is nice to have a furnace

Flat bar cast up

Machined to size cut in half then bored to fit the crank pin (i turned a dummy pin to dead size and one .001 smaller)
To use as test pieces

Very happy with the fit Jjust nipping but still free enough to turn)

Con rod will be next
John

PatJ · « **Reply #24 on:** July 20, 2011, 09:44:27 PM »

Nice work John.

Pat J

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Author Topic: Big Marine Steam Engine (Read 108758 times)

PatJ