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I am not sure that I agree with you on the 10 year old obsolescence of computers. Dedicate a computer to a single task and don't have it connected to the internet and it will give you amazing service for decades, I know because I am doing it.

The company is a UK company/bureau but he struggled to do more (I think his sub contractor went bust). I am now working witha University on a very inclusive project and will get my parts FOC. The best company to start off getting quotes from is Shapeways 3D Printing Service Online they have...

I fly fairly regularly with Peter Halman who was the development engineer at Irvines, he is very knowledgeable. So you are pretty good at soldering as well as machining if done a Morley 47G, I seem to remember that the tail boom was made up of soldered piano wire, looked very effective from...

We have done a deal with a University that majors in additive manufacturing, the NB40 will be used as part of the additive manufacturing course work and in return we get a number of FOC crankcases. The crankcase is not the hold up now, rather getting the aluminium cylinder chromed commercially...

I will watch the video out of interest this evening. You can see from the progress that we have made that we will be fairly wedded to the DMLS process and to beat it all I have found out an organisation who will do the DMLS printing for free !!

I guess that the high temperatures involved in iron casting maybe does away with my worries of deposits of PLA being left in the mould as I guess it just get obliterated. I am not sure that aluminium with the lower casting temps will handle this so well but stand to be proven wrong.

I guess my issue with lost PLA is that having run a lost was foundry I know the efforts that we went to stop the shells cracking, burning all the wax out and then firing the shells. I will have to take a look at lost PLA but like I say I have reservations based upon experience of lost wax...

Hello Jason Yes the top 5 fins are part of the liner (same piece of metal) the liner below the fins looks like a conventional model cylinder and the ports are machined in. The fins being part of the cylinder do two very advantageous things, 1) The heat dissipation is much better than a...

A lot cheaper than using bar stock and lighter and with a better finish for heat dissipation. Shapeways will do that crankcase for around $750.00 you would get nowhere close to that price for a 5 axis billet machined case as a one off, and I paid nowhere near to $750.00 either !! The DMLS...

Or just go direct to metal by DMLS like this one that we had done a few months ago. 3D file to print bureau and part comes back two weeks later. The printers are expensive at the moment but so were CNC's when they first came out !! Superb properties as far as we can tell.

I would like to say that when working with 3D files the least problematic format across a number of different CAD packages is the STP format. Higher end 3D CAD (the most high brow that I have experience with is Solidedge) have the least problems importing files. Having said that I use BobCAD...

Thanks, very useful advise.

Greentwin That is a really useful set of info that you have posted. I ran a foundry about 20 years ago and we exclusively used resin bound sand, it works great. What resin do you use and how do you mix it into the sane. We used a phenolic resin and it was mixed with the sand in a long mixing...

But just about anything needs post processing, I am thinking of machined pattern block (even with 0.1mm step overs) machined aluminium moulds and worst of all are wood or MDF tools.

I could take being called a saxon after all we are anglo saxons so part of the way there. It was the cheek of the Latino questioning my accent and pronunciation, it made me realise how '*******ised' English was becoming with it's global usage.

I am English and that reminds me of when I visited the Craftsmanship Museum down near Carlsbad CA, I had to fill the car up with petrol (Gasoline to you gents) and the Hispanic cashier in a moment of frustration about my credit card had the nerve to ask me what kind of English that I was...

Thanks for the reply, I was just mildly interested. Not really a worry for me as we use a decent spray filler and no amount of chemical smoothing will equal a sanded and faired finish on PLA.

Duratec is a great product but is a little harder than Reface. I think that Duratec has a slate filler where as Reface has a chalk filler that sands out a bit easier. I have seen huge mouldings released off of Duratec. Are you out of SA? There were some guys from SA at the World Championships...

What are those solvents?

My buddy and I have done a few 3D printed patterns and then sprayed and filled. It works super well. The fuz of the model in the photo is printed in 7 sections (done on a Dremel 3D20) at fine settings, the sections are then joined together on a tooling mandrel. The printed surface is flatted...