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Any active cooling solution is going to cost capital upfront, a fair bit of design time if not buying a commercial unit, and operating cost (electricity) over time. Peltier coolers are nice and compact but power hungry little things, using about as many watts as they cool (i.e. to provide...

Also, forgot to mention the Morton M5, $6 buys you the digital back issue of the magazine with the build and the drawings. Model Engine Builder - Issue 2 Mike

There's also the 1/4 scale Wright Whirlwind J-5 as designed by Karl-Erik Olsryd Grabcad link lots of nice renders, but importantly there are PDF's of the drawings as well. Not sure if the castings are still available - the family website I bought from is long gone...

I see it alot, even on "engineering drawings" for gas turbine lube systems where the piping and associated fittings are simply referred to as DIN38 or similar, to reference the nominal diameter - similar to saying 1 1/2" pipe. Its not a true full spec as it doesn't define the fitting...

The first set of rings I ever tried making were (accidentally) from ductile cast iron. Here is my experience from using that material. It didn't work as intended as a piston ring as it hasn't got enough spring in it, and the act of spreading it to fit over the piston permanently deformed it...

Which plans? I recently bought the L.K. Blackmore book (haven't built it) and in it the master rod is built up by pinning and silver soldered the rod to the central "hub". He does use the term "master rod" loosely for both the final assembly and for the main fixed rod that is assembled to the...

Hi John, The cylinders (Drawing J18) were never available as a casting to my knowledge. There was someone offering them machined on CNC but I never investigated to far as I was rather short on money back then (more than 10 years ago). The cylinders can be machined but are a finicky...

FYI - the castings were originally made by Vernal Engineering ( Bruce Satra ). Not sure who has the dies now but they are very fine castings. I must say that the engine is not for beginners, myself being one who has been picking away at this engine for over 10 years (but very infrequently).

As I said, they claim made in Canada, so there is an expectation that its more than purchasing a ready to go product from overseas and putting it in a new cardboard box, which is what the Everlast and other inexpensive welders are (and they don't claim to be anything other than that). I also...

My humble opinion is that for hobby type work the shorter length will likely never be an issue, unless you are trying to abuse your lathe and use it for wood turning. I've been TIG welder shopping and am seriously considering the Canaweld TIG AC/DC pulse 201-D over the Everlast - at least it...

The metric module cutters are significantly cheaper than the DP cutters of similar tooth size, so much so that I'm converting the drawings for the radial engine I'm building. This is mostly due to being available from China ( as opposed to being from say US / Germany / Poland / Taiwan etc. )...

With respect to "safer", even a mini lathe can hurt you if not paying attention or careless. Hair tied up, no loose clothing etc. Use safe work practice no matter the size. Respect the machine, it doesn't know or care if its cutting metal or you. I would expect the 707 from Busybee will...

You won't be crossing the border for shopping any time soon, and it won't be economical (must pay for covid test, quarantine required on return even if you just set foot across the border for 1 second)... Living in Ottawa, I know. As far as a lathe goes, I have a basically new 7x14 sitting...

I've seen alot of discussion on o-rings for pistons, but usually the discussion is around "slow running" engines - hit'n'miss types. What are peoples experiences with faster running engines? My thoughts are to try o-rings on my 9 cylinder build by making a set of custom pistoms for it, but its...

Have you taken into consideration the volume that the intake and exhaust passages have before the spool valves? With your design you have a lot more volume in your combustion chamber/valve passages so you are going to have a relatively low compression ratio. Not sure if you can accommodate and...

My recommendation for running LinuxCNC is to look into the MESA ethernet cards, like the 7i76e. You pay for the card but the software is free. Its controlled over ethernet and the PC latency doesn't matter nearly as much as the step timing is all done a the card, not the PC. And Fusion 360 -...

I wish I could get CamCalc to work - being Java based I can't seem to get it to run on my machine, even after downloading Java on Internet Explorer and rebooting. Has anybody looked into updating this? Not the sort of thing thats in my wheelhouse (coding) but appears that given the source code...

This thread got dragged up from the depths and I figure as the originator I should say I'm still around and progressing at speeds that make tectonic motion look fast.... That said I did more in the last 4 months than I had done in the previous 8 years (lots of excuses). I'll need to switch PC's...

You could always design it so that the CR is adjustable, something like the model diesel engine with a contra piston or some other device that fills in the void in the combustion chamber (easiest on a side valve design), or just have head shims that can be added or subtracted to adjust the CR...

If you get to the fundamental question of what keeps an engine running at a constant speed its that there is enough power stored as inertia in the engine / flywheel to get it through to the next power stroke (usually after delivering some form of output), otherwise it will keep slowing down and...