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After completing Ed’s excellent Holly Buddy Diesel engine, I really wanted to build a twin. After looking around for a long time I soon realised there wasn’t that much out there in terms of plans or build logs. I came across the Twin from Fig Tree Pocket in the Motor Boys plan book and a Sparey...

Hi people way more knowledgeable than I. I have made several single and one inline twin aero CI engines but would really like to have a go at an opposed twin or simultaneous firing V-twin. I could use some advice (PICTURES!!) on making the crankshaft. My dilemma is this: I can easily make the...

Hi All, when you're Googling and nothing comes up, you know your hobby is niche/cool!! 😂 I have been looking for online resources regarding the design of model 2-stroke engines (particularly CI 'diesel' engines) without much luck. @edholly put me on to some great site that allows you to...

A quick little mod I’ve been meaning to do for ages is to get a drip oiler fitted to my 6” bandsaw. I took the plunge and had a good old rummage in the scrap bucket and came up with this. The oiler is one I got off ebay a few years back when it thought it could be used for the Webster engine...

Hi, as I was looking around for a next project, and keen to try a twin aero CI engine, I got chatting to @edholly who has an enviable collection of beautiful engines (and equally enviable petrol-head history that makes me very jealous). A plot was hatched to take the 'mud map' sketches of his...

Hi, I normally go with a basic nut made of out mild steel hex bar on my aeros (or a nyloc nut on occasion). On my most recent build I thought I'd complete the look and make a nice prop nut/spinner as below. Anyone got any links/tips/tricks how to get the shape right? Any info appreciated as it...

Hi, after playing around and wasting a load of time cutting my own glass disks to make sight glass on the Webster and other builds, I went searching for somewhere I could buy them pre-cut. Took me a while and thought I'd share with anyone thats interested. In the end the right search term was...

Hi all, after procrastinating for months and clearly overthinking the problem of how to make the crankshaft for a twin diesel I/C engine, I decided I needed to be making some swarf over Christmas to decompress from work. After poring over the MotorBoys plans for a while I ended up on Adrian's...

Hi, after completing 5 single-cylinder compression ignition engines that run nicely. I thought its high time to get a twin under my belt. I had a look around and they seem pretty rare! I was looking at the FigTree Pocket twin (plans by Ron Chernich from the Motor Boys plan book) but haven'y made...

Hi, I just finished replacing the headstock bearings on my Sieg SC6 lathe and I thought I'd share how I did it incase it helps anyone else out there. Sieg lathes are the classic 'Chinese mini-lathe' so may well sell under different names / colours worldwide (Grizzly I think in the US?). Anyway...

Hi All, after finishing the two Boll Aero 18s and a workshop covered in castor oil and several scars and cuts on my fingers, it's finally time to get going on my next engine. After a few recommendations I have decided to go for the Nalon Viper 2.5 using plans from the Motor Boys crew at...

Hi Everyone, I have got myself stuck on my BollAero build and could really use a hand. I was wondering if there are any 2stroke compression-iginition experts out there that might be able to give me some tips. this is my second IC engine after a Webster and it seems these little puppies are less...

Hi, after completing my first engine (Webster) and procrastinating for 6 months, I have finally taken the plunge and decided to build my next engine. After much browsing I decided I would have a go at an aero diesel this time. I remember them so well from when I was a kid (including the sliced...

Hi HMEM, I wanted to run something by all you knowledgeable sorts out there. I have just completed a Webster engine and toying with the idea of having a go at designing an amateur workshop-friendly copy of the popular OS FS120 4-stroke glow engine (un-pumped)...

Hi All, I have just completed my first I/C engine build. Got there in the end and runs nicely (not perfectly but good. I still need to play with carb, exhaust valve and ignition timing a bit). This is my first post on the forum too so will be a bit clunky before I figure everything out. It...

Hi and thanks for having me in your forum! To introduce myself, I’m Patrick and I have a making addiction. Everything from rockets to robots, Gin to go-karts...even some electronics and Software in there too. Thanks to forums including yours, I’ve taught myself metalwork over the past...