Fuel

September 30, 2018 Nigel 0

The simplest definition is any substance burned for heat or power. Even in the model world this covers a lot of different fuels and so I will try and list them along with data and [more…]

Acoustic Filter Elements

September 28, 2018 Nigel 0

There are a number of different ways to attenuate the sound waves propagating down a duct (eg air intake, exhaust system) and I thought it would be good to list these different elements, how they [more…]

Exhaust

September 15, 2018 Nigel 0

Gases ejected from an engine as waste products are transported away from the engine using an exhaust system. The main features that must be considered are: Acoustic design – Acoustic Ducts, Acoustic Filter Elements (eg [more…]

Milling Cutters

August 12, 2018 Nigel 0

End Mill A milling cutter that is used mainly to machine on the side of the cutter and so used to profile a part. End mills do not tend to have a clearance cutting edge [more…]

Propagation of Sound

July 29, 2018 Nigel 0

At distances large compared to the size of the source, sound intensity diminishes according to the inverse square law. This is relatively simple to reliably calculate, provided the source is small and outdoors where no [more…]

Lathe Tools

July 22, 2018 Nigel 0

The tool that is held in a toolpost on the lathe cross-slide and which is feed into the rotating workpiece to machine it to size. Lathe tools are made from high speed steel (HSS), Tungsten [more…]

Belt Drives

July 15, 2018 Nigel 0

There are a number of ways to transmit power between two shafts, often to enable speed reduction and torque increase, but one of the easiest ways is to use a form of belt drive. They [more…]

Reduce any Overhangs

July 1, 2018 Nigel 0

One key parameter with regards to any tools is to reduce the overhang and so reduce the chance of chatter or even worse parts and tools breaking. The image shows a simple change in the [more…]

Slider Crank Linkage

May 6, 2018 Nigel 0

The slider crank is common in steam engine design as it removes the side forces from the piston and from the connecting rod that is sealed by the gland as it passes into the cylinder. [more…]