The Bucket Foundry

[Flettner]

I love how they call the cement Vesuvius. I hope it's not an omen of things to come.
Based on past experience that is. Of the day it was raining molten Aluminum.

Just the very thing I want to avoid in the future. The good wife is still uneasy about me firing up the furnace.

[husaberg]

Nice chart of use properties and different names for Alloys by spec

http://www.cast-alloys.com/products/lm_chart.htm

[F5 Dave]

Just the very thing I want to avoid in the future. The good wife is still uneasy about me firing up the furnace.

Maybe some form of large brimmed hat may be in order?

[Flettner]

radiator welded up and fitted. Fuel pump next and then I can finish the tank off, some of which will need to be re welded, bugger it.

[husaberg]

radiator welded up and fitted. Fuel pump next and then I can finish the tank off, some of which will need to be re welded, bugger it.

I see you went with the plaid cylinder this time.

[Flettner]

Yes, I have intetested parties in the Mk2 TPI but they can bloody well talk to me about it first this time before they just copy it.
I've got some polka dot pillow cases lined up next.

[Frits Overmars]

I see you went with the plaid cylinder this time.

Must be the HCCI version hidden beneath it - no ignition needed at all.

[OopsClunkThud]

Pretending like I know what I'm doing. Working on an intake manifold pattern for my MotoBi 125

[Frits Overmars]

Those are the weirdest camshafts I've ever seen.

[Flettner]

Pretending like I know what I'm doing. Working on an intake manifold pattern for my MotoBi 125

So you have a core box? Printed?
Is this pattern printed or made with wood and filler?
Or have you done it the way I do, build the core, make the core box from that core, pour a working core in that box then build the pattern up from that.

[OopsClunkThud]

So you have a core box? Printed?
Is this pattern printed or made with wood and filler?
Or have you done it the way I do, build the core, make the core box from that core, pour a working core in that box then build the pattern up from that.

The pattern you see was printed
The core box will be next and also printed, made some small size adjustments based on how the primer fills the printed surface.

So, not the way you do it. But the way you do it has changed how I work in CAD. I have a beads and bondo macro built to layer onto the the core (not really but still think about it like it is)

[peewee]

radiator welded up and fitted. Fuel pump next and then I can finish the tank off, some of which will need to be re welded, bugger it.

check for leaks first off. water with food coloring should be enough but you could pressure it up just to be sure. i missed a pinhole in mine. luckily it didnt catch fire

[Grumph]

check for leaks first off. water with food coloring should be enough but you could pressure it up just to be sure. i missed a pinhole in mine. luckily it didnt catch fire

2 - 3 psi air and soapy water is the classic method - and it works too.

Went along to a race meeting last weekend to touch base with a few people. Found a customer of mine running a Manx on methanol - with a leaky tank seam.
Asked to see his fire extinguisher - wrong one for methanol....pointed this out along with the risks he was running, then walked away.
Must have worked, he told me today he's bought a big extinguisher with the correct contents.

[Flettner]

Its usually a bit of air pressure and throw it in the water trough. My Auotgyro engine frames and forward masts are steel tube, fully seal welded and under pressure all the time as a crack detection system (small gauges fitted in the instrument pod) so it's important there are no leaks when manufactured. I put 100 psi in them and submerge them in the sheep trough (that would be the CAA certified pressure test regime), once sealed, good to be painted over.
So every hour of every day these components are under pressure crack test. No pressure reading on the gadge, don't fly untill you know why.
I know, slightly off subject.

[Frits Overmars]

Its usually a bit of air pressure and throw it in the water trough. My Auotgyro engine frames and forward masts are steel tube, fully seal welded and under pressure all the time as a crack detection system (small gauges fitted in the instrument pod) so it's important there are no leaks when manufactured. I put 100 psi in them and submerge them in the sheep trough (that would be the CAA certified pressure test regime), once sealed, good to be painted over.
So every hour of every day these components are under pressure crack test. No pressure reading on the gadge, don't fly untill you know why.
I know, slightly off subject.

Since we're off subject: the same crack-detecting scheme would be fine for motorcycle frames. In fact it has been used by Bimota.
But I wonder: if a crack starts developing in a painted frame, wouldn't the paint (or even worse: powdercoating) hide the leakage until the crack gets really severe?