Centre Drill Profile

June 30, 2017 Nigel 0

I use centre drills all of the time, usually as a pilot drill in the lathe to give me a good starter for a larger drill. However, whey are they the profile they are? A [more…]

Steam Indicator Diagram

June 23, 2017 Nigel 0

The pressure in the cylinder is plotted versus the cylinder volume. This was developed by James Watt and John Southern to improve the efficiency of the steam engine. The work done is the area within [more…]

Gas Turbine

May 20, 2017 Nigel 0

Although practical model jet engines have been around since the early 1980’s it has only been in the past few years that home construction has become viable. Careful design has made simple home construction possible [more…]

Pistons and Liners

April 17, 2017 Nigel 0

There are a number of different combinations of materials for the piston and liner of engines. I’ve listed a number below and comment on their merits, if I’ve missed one then do drop me a [more…]

Crankshaft

February 25, 2017 Nigel 0

A crankshaft machined from a solid piece of mild steel. This is quite a daunting thing to machine for the new model engineer and so I have described the steps I’ve taken in making this [more…]

Exhaust Silencer Design

January 29, 2017 Nigel 0

The exhaust system on an internal combustion engine may be used to reduce noise and/or increase power. A pressure tapping is also used on many exhaust systems to pressurise the fuel tank and hence allow [more…]

Anatomy of a Lathe

November 8, 2016 Nigel 0

Just bought a lathe and feeling a touch in awe of it? The first thing then is to familiarise yourself with what is what around the lathe? This particular lathe is a Warco WM240B (review [more…]

Bolt Patterns and Clearance

July 23, 2016 Nigel 0

Sometimes I just struggle to get the correct clearances and bolt patterns. Often due to the fact that I change my mind on the type or size of bolts that I should use. The trouble [more…]