brass strips cut on the bandsaw

Cutting Brass on a Bandsaw

February 28, 2020 Nigel 0

Cutting brass on a bandsaw can be difficult and so I devised this simple modification to overcome two of the main issues. My solution was to fit an MDF board on top of the cast [more…]

tin of cotter pins

Cotter Pins

February 27, 2020 Nigel 0

Cotter pins or split pins are half round wire pins that are formed such that they can be pushed through a hole and the legs then bent to stop them sliding out. This means they [more…]

traction engine rear hub

Rear Wheel Hubs

February 27, 2020 Nigel 0

The rear wheel hubs for the miniature traction engine that I’m making need to be indexed with eight spokes each side of a single wheel. The trick is that the spokes are out of “phase” and [more…]

engine valve stood on caliper

Air Intake System

February 17, 2020 Nigel 0

The air intake system channels clean air and fuel to an internal combustion engine. The primary function is to channel clean and cool air to the engine. In indirect injection engines the fuel is added [more…]

1/4 inch spark plug

Engine Ignition System

February 8, 2020 Nigel 0

When we talk about the engine ignition system there are two fundamental types: compression ignition spark ignition. This is the system for igniting an fuel-air mixture that has been compressed in the cylinder by the [more…]

SEO image for engineering post

Model Engineering SEO

February 8, 2020 Nigel 0

What do I mean by Model Engineering SEO? SEO is search engine optimization, model engineering is a hobby that feels very vibrant, but the view is it is dying out. Let’s start with the perhaps [more…]

old lead acid battery

Lead Acid Battery

February 7, 2020 Nigel 0

The Lead Acid Battery is a battery with electrodes of lead oxide and metallic lead that are separated by an electrolyte of sulphuric acid. The overall reaction is: PbO2 + Pb + 2H2SO4 <=> 2PbSO4 [more…]

nickel metal hydride battery

Nickel Metal Hydride Battery

February 5, 2020 Nigel 0

The Nickel Metal Hydride battery has a nickel-hydroxide cathode, a metal hydride (a variety of metal alloys are used) anode, and aqueous potassium hydroxide electrolyte. This is a rechargeable battery chemistry that has been superseded [more…]

lithium ion battery schematic

Lithium Ion Battery

February 4, 2020 Nigel 0

In a rechargeable lithium ion battery lithium ions move from the negative electrode to the positive electrode during discharge, and back when charging. The cathode is a lithium transition metal oxide, eg manganese or cobalt [more…]