The Bucket Foundry

[Flettner]

God that is depressing, Mold release decides not to work (AGAIN) weekends work down the drain, start again! Only I'm not sure I'm just over it.This 655 is just shit. I guess I've calmed down a bit now, just start again and use a shit load of release agent next time.

[WilDun]

God that is depressing, Mold release decides not to work (AGAIN) weekends work down the drain, start again! Only I'm not sure I'm just over it.This 655 is just shit. I guess I've calmed down a bit now, just start again and use a shit load of release adgent next time.

That is a shame, still, I'll know what not to use now!
BTW - why not use HT steel tube (suitably hardened and ground) for your piston rod?

[Flettner]

That is a shame, still, I'll know what not to use now!
BTW - why not use HT steel tube (suitably hardened and ground) for your piston rod?

Have thought about it, but aluminium would still be lighter. This thing could rev fairly hard. 30,001 rpm

[Frits Overmars]

Have thought about it, but aluminium would still be lighter. This thing could rev fairly hard. 30,001 rpm

Better stay on the safe side Neil. Like 29.999 rpm .

[breezy]

Yes there will be a separated crank case to under piston. I was just going to inject standard twostroke fuel (help the ring and just because) but ultimately it would be good to just use straight fuel. Start safe first.
The bloody epicycloid crank, the anodizes wreaked my alloy rod and I haven't made a new one yet. BUT I will as I need to use something to make the piston rod go straight up and down. I have another method (not the leaver arm/beam) but that will require starting from scratch, never the less a worthy opponent to the epicycloid I think.

i would imagine that the oil percentage in the fuel mix could be leaned down quite a way with not having to worry about the bottom end area.?

[Flettner]

Better stay on the safe side Neil. Like 29.999 rpm .

I'm over it, I'm at the acceptance stage now (acceptance I'm a dumb ass). I'll get back into the mold building this weekend again, this time pay more attention to the finish and more release agent. This disaster would never have happened with Rencast!!
I have had this 'alternative crank' verified by an 'off shore expert' and it seems it might be workable, certainly better than the epicycloid. Interestingly it also acts as a balance shaft and it's much easier to build with no internal gear. Epicycloid might shake a bit I think.

[Flettner]

i would imagine that the oil percentage in the fuel mix could be leaned down quite a way with not having to worry about the bottom end area.?

And no piston friction.

[Flettner]

Better stay on the safe side Neil. Like 29.999 rpm .

Quite safe at the moment, 0 rpm. It's frustrating knowing what I want and knowing how to do it but TIME and work (read that as need for money) just keep getting in the way. I know it's the same for everyone, never the less it would be good to just rip into it with no distractions.

[WilDun]

Quite safe at the moment, 0 rpm. It's frustrating knowing what I want and knowing how to do it but TIME and work (read that as need for money) just keep getting in the way. I know it's the same for everyone, never the less it would be good to just rip into it with no distractions.

For a start, nobody who seriously considers alternatives and is able see beyond the flashing lights, sparkling chrome and frills of today's market offerings, is "dumb"

The problem with research is that it can't be done at a profit, but if it eventually looks like winning through, the profit guys (read vultures) move in and capitalize on it, as many good engineers have found!

[Flettner]

Mmmmm F81M copy cast head. See the detail that has transferred across. Modified to central plug. CC601 heat treated.

[eldog]

The problem with research is that it can't be done at a profit, but if it eventually looks like winning through, the profit guys (read vultures) move in and capitalize on it, as many good engineers have found!

seen that a few times recently.....

after finding out the problem areas, the vultures swoop in and take over the struggling company, put a few notes in, get it going, all the while asset stripping etc. then wait and sell the 'profitable company' to some other poor sap.
while those who went out on a limb and support and struggled to get paid from the first burnt out owner, watch helpless.

the vultures moving on having made their money

[eldog]

Quite safe at the moment, 0 rpm. It's frustrating knowing what I want and knowing how to do it but TIME and work (read that as need for money) just keep getting in the way. I know it's the same for everyone, never the less it would be good to just rip into it with no distractions.

no matter how hard you try, sometimes it doesn't work, no matter who you are. things just go wrong.

its when things all come together and your plan works that make the struggle worth while...


The last couple of weeks has just been going from bad to worse. but every now and then things have picked up and worked.
back to work I go.

[Yow Ling]

Better stay on the safe side Neil. Like 29.999 rpm .

a thousand times less , yes that sure is the safe side

[Lightbulb]

God that is depressing, Mold release decides not to work (AGAIN) weekends work down the drain, start again! Only I'm not sure I'm just over it.This 655 is just shit. I guess I've calmed down a bit now, just start again and use a shit load of release agent next time.

What release agent are / were you using?

[Frits Overmars]

a thousand times less , yes that sure is the safe side

Are you accusing me of using a decimal point Yow Ling ?