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Archive

Phosphating

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Phosphate coatings have been covered in a couple of previous surface treatment articles. In the first of these articles, we looked mainly at engine applications, including piston rings, camshafts and so on. In the second article, we looked in slightly more depth at some of the advantages and disadvantages of phosphating. The design engineer or metallurgist who recommends this type of coating needs to be aware of the potential problems with hydrogen embrittlement of high-strength steels...

CT component testing

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Accurate measurement and testing of parts with complex internal features can be fraught with difficulties. Often, the only way to achieve accurate checking is to sacrifice a part to destructive testing in order to ensure correct internal tolerances are being met. However, even this cannot ensure complete control over the quality of finished parts. For example, the make-up of parts produced using SLS (selective laser sintering) processes can vary from one component to the next, so a means...

The Formula One clutch

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The transmissions used in Formula One do not require the use of a clutch during gear changes, and as such, drivers only use a clutch during the start of the race and when leaving a pit stop. Despite this infrequent use, they are still an important contributor to a car’s performance, not least because a poor start can ruin a race result. Carbon-carbon clutches have been the norm in Formula One since the mid-1980s, providing high levels of  bite and heat resistance coupled with low...

Collets - surface treatments and coatings

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Valve collets (also known as valve keepers, valve cotters or valve locks) are not something that engine tuners often turn to in order to make their engines perform better or improve reliability. While collets for the general automotive market are very price-sensitive, decisions on the quality of racing collets are not driven purely by the desire to save, say, 0.1 cents per piece. So, where collets for passenger cars are stamped from sheet steel or wire, many of those produced for racing...

Restrictions on aerodynamic testing

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Aerodynamic resource restrictions in Formula One were introduced in 2009 as a means to limit a team’s expenditure on aerodynamics. Large investments were being made in full-scale wind tunnels, computational clusters and on-track testing – investment that was getting out of control. To prevent an ‘arms race’, running full-size cars in a wind tunnel (WT), and track testing, were severely restricted. In addition, limits were placed on a team’s wind tunnel and CFD...
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