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Owen I would highly recommend that you read every post in the following link from Jan Thiel and Fritz Overmars, skip posts by other people, there are then another 3 parts to the thread. It is a treasure trove of information on the type of engine that you are working with. [GP125] All that you...

There is a very good upgrade review of the PD400 on youtube (61) Proxxon PD400 lathe review part I - YouTube The reviewer is a perfectionist and in the comments section I managed to get him to comment upon duty cycle and the answer is quite encouraging, he has run the lathe for 3 hours.

Owen I have talked to one of the UK's real small engine experts on piston material today and 2618 is quite favoured for making ringed pistons, in fact the well know English company called Laser who make 4 stroke glow plug engines use 2618. Just machine the piston from solid, that is what a lot...

You can turn steel, titanium, stainless steel etc on small lathes but the cutting tools are more important. Take a look at these video's (59) Cutting Steel (12L14b) - YouTube (59) Cutting Titanium 2 (Heavy cut) - YouTube All the good small lathes will do this type of cut. B.

DBL-1000 is a nice lathe but not as stiff as a Unimat 3 due to the round bar bed on the one that you show.

Owen Could I suggest that you take a look at the following website which has masses of model engine tests. Model Engine Tests (sceptreflight.com) I have quickly scanned through a few engine tests on that site and material specifications are mentioned for a lot of components, although I did...

Bigmich Unimat 3's are very nice machines, with very few downsides IMO. I have one with the milling attachment but will not sell it as my Granddaughter and I are going to do some work on it soon. I would look at the following machines. Sherline - very nice machines with an extensive range of...

I don't think Owen is searching for the really high silicone content alu but a very popular type is called RSA444 and it is made in Holland by a company called RSP, they are easy to deal with. Their 30% Si material RSA444 is superb material to work with, I use PCD tips and a good starting point...

Welcome Arnaldo I also fly control line and RC aircraft and make many small parts for the engines although not complete engines yet. Barrie Southampton, England

Hello Yellow Cad I am the owner of that Group and it is very active with 1275 members and has two moderators in addition to myself who vet the new members. I can promise you there is only one pending member and their application was on the 19th May and a welcome email was sent to them to which...

Poor old thing, last used as a wood turning lathe by the looks of things.

"These engines are no good to me unless I can build a contra-rotating prop drive, for a vertical takeoff aircraft." You do not need a contra rotating prop for a VTOL prop driven model aircraft, just go on the web and see the 1000's of youngsters prop hanging electric RC models . I would...

I quite extensively used Mike Billintons torque reaction dyno, this was a very precise device and was finely tuned over many years. A torque reaction dyno like Mikes uses crude props to provide the load on the engine, these are not calibrated as there is no need. You just measure the RPM and...

"It would be nice if a model aircraft two-stroke ran more like a four-stroke, for firing smoothness." That of course is a matter of personal opinion !! "There may even be a lot of limitations on running existing engines, and a severe restriction of suitable liquid fuel." Alcohol burning model...

Lohring I done the composite engineering on the Jaguar electric World speed record boat. It had Williams Formula E batteries and Yasa pancake motors for 300hp Jaguar Vector Racing | Electric Powerboat World Record - YouTube B.

The forum is slightly biased to North America but with healthy inputs from Europe and other geographical areas. You should be able to find 60 series alu in NZ, there are a mass of suppliers on Ebay but shipping to NZ will be the problem, better to get it shipped to a private address in say the...

I have looked at the website you linked and there are two machines, the cheaper one looks too light for metal, the more expensive machine looks a lot more ridged. As others have said the use of router motors from the wood work sector has limitations. Rig it up with a brushless spindle and it...

Be careful of CAM that only imports STL files, they seem to be much more limited in the tool paths that they can offer, I have just had a quick look at Meshcam and Deskproto and they are light years behind where F360 CAM is currently. By the way I don't use F360 but I know it's capability...

Principally methanol fuelled model engines have a platinum element but it is alloyed with Rhodium and I think Iridium, the wire is very expensive now with the pressures on these materials from automotive among other things.

I have obtained the correct wire as used by commercial glowplug manufacturers, I have the first plug bodies assembled, just got to spot weld the wire into place. B.