xander janssen

Laying out the gears.

I wrote a building report that got published in the German magazine " Maschinen im Modellbau"

Rocker arm: brass strip with brazed hardened end pieces. The end pieces have a 1.5 mm slot in which the brass strip is inserted for...

These are the valves just before brazing, fluxed and with smalll pieces of silver solder on top.

Freshly ground and stoned HSS toolbit 60 degree point, 4th from the left. Very slow feed rate, i.e. much smaller than 1/5 of the nose...

Valve cages are in. The exhaust valve is set slightly deeper to reduce impact of thermal load.

Wow, great idea to have it combined in one valve and the straight air inlet channels. What is roughly the diameter of the valve? Just...

Hi there, I was wondering if I can run my IC engine 25 mm (1 inch) bore on propane or butane (or mixture) to avoid having the need for...

I use a cellulose base with NBR rubber binder compound. https://www.bengs-modellbau.de/material/dichtelemente/abil-dichtpapier To...

An open injector works similar as the "spray cup" in the Brons engine patent. https://en.m.wikipedia.org/wiki/Brons

Mr Find Hansen made his injector "free floating" to avoid this problem. In one of his youtube videos he explains what this means...

Bronze valve body and brazed stainless steel valve. Air tight straight after machining on the lathe. No lapping with polishing paste...

Hi, There are various boots in/around the Netherlands that still run this engine. One of them I use as a source for the measurements...

Rocker arm stands finished