Forensic Engineers and Consultants

Archive: Mechanical Systems

Graphitic Corrosion – Difficult to determine before a failure!

Graphitic corrosion is a process that may happen in equipment made of iron, particularly grey cast iron, but also ductile cast iron. Graphitic corrosion can lead to unexpected catastrophic failure of the affected part because the cast iron can lose its strength without a visible warning such as a change in size, shape, or appearance. Read More

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A clevis pin with the spring clip attached.

Defective Clevis Pin Culprit in Runaway Trailer

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A large agricultural trailer had been connected to a truck using a clevis pin with a spring locking clip.  The trailer became disconnected from the truck and collided with an oncoming vehicle.  The trailer was in poor condition, did not have safety chains, and had substantial recent modifications by the owner. Read More

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Are You Prepared for Emergencies? Your Generator Set Should Be!

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Emergency generators are often called into service during catastrophic events like hurricanes, floods, tornadoes or fires, but also during more mundane events like thunderstorms and other things that may temporarily interrupt the public power grid. Can you rely on your generator to perform at those critical times? Read More

A condensate drain that has been obstructed by nesting animals.

Air Conditioning Evaporators

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This is the third and final of three articles concerning the basics of air conditioning systems.  This article concerns the evaporator, a part of the air conditioning system that is usually unseen inside the air handling unit. The evaporator, in concert with a fan, supplies cool air to a building interior. Read More

A typical residential HVAC Unit.

Air Conditioning Condensing Units

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The condensing unit is a key component of all vapor compression air conditioning systems.  We are all familiar with condensing units as the noisy exterior portions of air conditioning systems that blow hot air to the environment. Read More

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Air Conditioning System Basics

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Air conditioning systems are everywhere in our lives – at home, in our vehicles, at work, in manufacturing facilities – yet most people give them little thought other than setting a comfortable temperature until they stop working or malfunction in some other way. Read More

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