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Ron said the following [https://modelenginenews.org/m5/morton.html#s1a]: That does not seem to make sense in light of the drawing: The Morton M-5's five cylinders are at 72° intervals with the #1 cylinder at top dead center. It seems to me that the drawing shows that the 10 tappet guide...

Adrians models engines has a link <https://www.adriansmodelaeroengines.com/catalog/attachments/Dragonflea.pdf> to Ron Chernich's plans for a 0.1-CC Dragonflea engine based on the early 1960s Dragonfly, but the link is a dead end. I tried messaging Adrian on his blog, but have not heard back...

Deckel FP2NC "Flip-Head" 6300 RPM vertical spindle, tilting head, with quill 3150 RPM horizontal spindle with quill Cat 40 - hydraulic drawbars Fixed table Dialog 4 Control - latest software - among the G.O.A.T. of toolroom CNC controls Helical interpolation (thread-mills beautiful threads)...

I am building a Breisch/Peters 1/2-scale Olds Type R hit-and-miss. I want to use a Hall effect sensor as an ignition trigger, with triggering from a magnet on the exhaust valve pushrod, but I am concerned about double-triggering. The plans call for old-school Kettering points that trigger from a...

Or do I need to use RCEXL's trigger device? I have Panasonic 6852 Hall devices and timer caps machined to suit, and would rather not have to re-machine things to accommodate a different device. This is for my riffed Upshur Twins. I am making six Twins and have gotten two finished to the stage...

I got the first run on one of six engines I have been building based on Hamilton Upshur's Twin published in Model Engine Builder in 2006. The engine ran briefly on a prime yesterday before I hooked up the fuel tank, and pretty much fired right up today. That's a testament to Hamilton's...

I just finished up Mark I Mark II Nalon Vipers from plans purchased from Ron Chernich at ModelEngineNews.org. They are rear rotary valve, ball bearing, 0.15 in3 (2.5 CC) "Diesels." They both run great, but they're LOUD! About the only deviations from the plans were in the design of the conrod...

Does anyone know of published plans for a CO2 model airplane engine? That'd be one that uses CO2 cartridges like for paintball guns or seltzer water.

I am building a pair of Nalon Viper 2.5-cc "Diesel" model airplane engines per Ron Chernich's plans purchased from MEN.org. The design calls for two ball bearings to support the crankshaft, one just in front of the crank disk and one just behind the prop driver. I bought shielded bearings. I am...

Over the past month or so I built this pair of PMC Imps like the ones Gail chronicled here. I used Ron Chernich's plans from Model Engine News. They are about as identical as I could make them. All parts are interchangeable, except possibly the piston and contra, although even those are darn...

What is the proper connector for the high-tension side of a Modelectric ignition coil? The one on the coil looks like a snap on a toddler's jammies. See attached photos.

I am building 3 Nanos. I ran into an inconsistency in the dimensions providing the angular location of the inlet port relative to top dead center (TDC). The text and drawings ask me to lock the crank at 43 degrees before TDC and drill the port through the venturi. The drawings say to get the 43...

Here are a couple of photos of the "Clanford Clan" I built to plans published by Ron Chernich on ModelEngineNews.org. It runs, albeit SLOWLY. I think this is mainly because the piston fit is still quite tight. I deviated from the plans by substituting ANSI UN threads, some imperial dimensions...

We had some quality time building this. https://picasaweb.google.com/lh/photo/pVMcaSrQxNajEjceOdm3Bg?feat=directlink I looked for some still photos I know I had taken, but I cannot find them. :(

I've done it more than once! Saturday I decided to remake the leaky contra-piston of my ML Midge "Diesel." I measured the old one and came up with 0.4201". I made the new one dead nuts. Only problem is, the bore is 0.3951"! I misread the micrometer as 0.4000+0.0201 instead of 0.3750+0.0201. I...

I broke two 1/16" endmills today, and then I broke my favorite threadmill. The endmills broke because of dumb CNC moves. The first one snapped because I forgot to slow down on an outside corner, such that the cutting speed on the outside of the curve ran too high. The next one snapped because I...

Today I finished an ML Midge and got it running. This is my first "diesel." My first IC engine was a Little Dragon, shown below. I built it in the midst of building a Breisch Associated Hired Man hit-and-miss, also shown below. I bought the Hired Man castings from Paul in his basement when...

I was making a set of piston ring compressors last night by boring round slugs to just under cylinder sizes, and then boring a long 6-degree taper. On the first one, as I approached the right taper length, I felt a step just where the taper feathered out into the original straight section. I...