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Top work Keith, that V10 looks tantalising. Love the subtle anodised highlights.

This is correct. Small displacement multi-cylinder engines have more internal surface area in proportion to the swept capacity. So a greater fraction of the chemical input energy is lost as heat, both via friction and conduction. This means the radiator doesn't scale with the engine in the...

Our machines have a 250 x 250 x 350mm build volume. Current materials are titanium (6Al4V alloy or pure Ti), aluminium, several steels, inconel, cobalt-chromium alloy. It isn't a cheap process, like everything it isn't suited to every part. Realistically it isn't economically feasible to make...

It is indeed possible to print functional parts directly in metal. Developing and selling such machines is my day job. Currently most of them are going to healthcare users (dental/medical implants etc), with aerospace and automotive companies also using them. For high precision parts with...

Simply superb. Congratulations on a great engine.

That's a very useful bit of advice - thanks for posting.

Sbdtasos - you can make your valves seal directly in the head, and still have a durable engine. This is according to Schillings himself in his book Boxer, Reihen und v-motoren als modell. In it he states that he has over 25 years of running on one of his engines, with no bronze valve seats or...

He's turning the crank between centres at that point. The crank isn't actually being gripped by the chuck, the bolt is acting as a drive dog. This is the best way to get the part rotating on a repeatable axis even if you need to remove and replace it multiple times.

2 simple questions: 1. How did you protect the journals frm the steel shot? 2. What method did you use to polish the journals? Superb crank.

Top work Keith, as usual the standard of your finishing is inspiring. To add a little to the turbo discussion, you might want to take a look at the design of some dental air turbines. They use a pelton wheel and some of the fastest out there are operating at over 1 million RPM. The wheel...

How stable is that idle?! That machine is butter smooth, it runs amazingly Keith! Plus I got the first comment on your Youtube vid! :cool: Now I'd also love to hear the technical parts about how you solved your problems.

Keith, please post a video soon! This looks absolutely amazing. And very neat and tidy. Personally I have never seen a model engine properly controlled with a real ECU and I think it may be a first. This is the way to go, it will be the first of many. Great achievement!

Superb progress here! This is what I have been waiting to see. Keith, what made you fit the tube in the path of the injector? I wonder how it would run without that. Seems to me that there is sufficient runner surface and intake tract for fuel to stick to (and keep your engine running for...

I like the idea of the annealed copper sheet. Conducts well too. In your position Keith I would go with that but simply make replacements for your current Teflon washers out of the annealed copper. It would then just be a case of swapping parts out, rather than any more machine work on your...

Keith, if you want to get one of those CDI systems, check out either Just Engines or the Hobbyking UK warehouse. Both sources sell them, and they are not expensive. I am planning to go that route with my engines. Dsage, it is great to hear that this system works on your V8. I haven't seen a...

Here's a particularly nice example of one running: http://www.youtube.com/watch?v=0xe1LL1IC7Y

GT-85 is not only available from Halfords and isn't their product, it is just an easy way of getting it. I buy it in 1 litre trigger spray bottles on Ebay. It is definitely not the same as WD40. For small jobs like this I find it the easiest and most mess-free solution. For longer runs I use...

When my cutters clog I knock the clogging out with a short length of 1.6mm piano wire and a hammer. Not chipped a tool yet. Also, if you can get GT85 (Halfords) use some of that, it is even better than WD40 as a lube for aluminium. However I think switching to 2-flute will make the biggest...

Geardxf is a nice, simple program that will allow you to extract the tooth form (and therefore cutter form) for any spur gear. Check it out: http://www.forestmoon.com/Software/GearDXF/

The reason your dehumidifier doesn't work is because it is probably a refrigerant type. I use a dessicant dehmidifier over the cold months and never have a rust problem. These are not sensitive to low temperatures. Mine is made by Meaco. They are also far smaller than most, which is...