Steam Engine Base Pattern - Printable Version

Steam Engine Base Pattern - Printable Version

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Steam Engine Base Pattern - doubleboost - 07-01-2012

Hi
Lads
I have been wanting to make a horizontal steam engine for some time now
As i have a cylinder pattern from my marine engine i decided to make the engine around this
It will be a fairly big affair with no bolts smaller than M6 Slaphead

A simple L shaped pattern is needed for the base
In the past i have used MDF as pattern material Jawdrop

The dust from sanding and machining this horrible material has made me feel poorly on more than one occasion Slaphead

Rob Wilson donated some Birch ply wood and i had some bits of old Oak shelving (Popper wood)

[Image: IMG_3831.jpg]

The basic shape glued together
[Image: IMG_3893.jpg]

Car body filler is used to blend curves

[Image: P7010133.jpg]

All internal corners need a nice smooth fillet ,in the past i used car body filler (easy to apply but hard work to sand off)
I bought some fillet wax (bees wax) this is blended in to the corners with a ball bearing on a stick.
Much easier and faster than body filler.

[Image: P7010139.jpg]

As you add more detail it starts to look something
[Image: P7010146.jpg]

The Grey bit will be hollow the rest is solid
[Image: P7010148.jpg]

A coat of high build primer transforms the pattern
John

RE: Steam Engine Base Patern - RobWilson - 07-01-2012

Can i have my ply back Rotfl

marzipan looks like it did the job Rotfl

Rob

RE: Steam Engine Base Patern - doubleboost - 07-01-2012

(07-01-2012, 03:13 PM)RobWilson Wrote: Can i have my ply back

Rob

Be wanting your Bronze back next Rotfl

John

RE: Steam Engine Base Patern - EdK - 07-01-2012

John,

Nice job on the pattern. That's going to be a good sized pour. 6820

RE: Steam Engine Base Patern - RobWilson - 07-01-2012

(07-01-2012, 03:14 PM)doubleboost Wrote:
(07-01-2012, 03:13 PM)RobWilson Wrote: Can i have my ply back

Rob

Be wanting your Bronze back next
John

Rob

RE: Steam Engine Base Patern - DaveH - 07-01-2012

John,

Well that looks good

May be you should have taken up woodwork Rotfl

Marzipan ....... I thought it was cheese Chin

Dave

RE: Steam Engine Base Patern - Bill Gruby - 07-01-2012

Lookin good. gonna have to give that a go one day.

"Billy G" Big Grin

RE: Steam Engine Base Patern - TomG - 07-01-2012

Nice looking pattern John.

Are we going to get to see pics of the casting process as well?

Tom

RE: Steam Engine Base Patern - krv3000 - 07-02-2012

well dun john Thumbsup

RE: Steam Engine Base Patern - doubleboost - 07-08-2012

This base will need 3.5 litres of metal pluss the risers & runners
My big crucible is not big enough
I cant get a bigger one in the furnace
Time for a furnace extension & a even bigger crucible Thumbsup

A couple of bands were formed (bent around a oxy bottle)
These were tack welded to the bench and filled with castable refractory
[Image: P7080020.jpg]

This gave the furnace 4 inches of extra depth
[Image: P7080018.jpg]

Now for a bigger crucible
This is exactly the same as the last one only taller

[Image: P7080017.jpg]

Easy method of work holding a couple of tack welds & a big nut
[Image: P7080012.jpg]

Machined to size and prepped for welding
[Image: P7080016.jpg]

I can now melt 5 liters easily
John