A bicycle helmet is essential for safety and often required by law. Modern designs are lightweight and sturdy. Choose a certified helmet that fits snugly and sits two inches above the eyebrows. Replace after an accident and avoid helmets with protrusions or excessive ventilation. A bicycle helmet is essential safety equipment for cyclists, whether they […]
Wearing a helmet while cycling is important to protect against head injuries, which can range from minor concussions to death. Helmets absorb shock and minimize the risk of permanent damage. Adults should set an example for children and teenagers by wearing helmets themselves. For most of the recorded history of bicycles, wearing a helmet was […]
Ski helmets have become a necessity for skiers and snowboarders to prevent head injuries caused by falls, collisions, and hidden objects. They are designed similarly to bicycle helmets and can be full-face or open-face. A snug fit, ear flaps, and a tab for ski goggles are common features. For years, extreme sports have required the […]
The hull is the basic structure of a ship, with three main designs: displacement, planing, and semi-displacement. Each has advantages and disadvantages, with displacement being safer and more fuel efficient, planing being faster but less efficient, and semi-displacement being a compromise between the two. The hull is the basic structure of a ship, not including […]
Full-face helmets are used by motorcyclists, cyclists, and skiers to protect the head and face during hazardous activities. They vary in design depending on the sport, with DOT-approved helmets required for motorcyclists. Off-road motorcyclists and bicyclists may wear helmets without built-in visors, with separate crash tests for bicycle helmets. The full-face helmet is common among […]
A tunnel hull design uses two parallel hulls with a solid center section that traps air, creating lift and speed. It is used in powerboat racing and some kayaks. The design is stable and streamlined but can cause dangerous rollover accidents. Racing teams rely on onboard oxygen systems and have a driver and throttle operator. […]
The cathedral hull design uses a center V-type hull with smaller V-shaped sponges on each side, providing stability and flotation. It is used on fishing, recreational, and deck boats, and is good for traversing shallow water and skiing, but can be rough in choppy water. A cathedral hull is a type of ship’s hull design […]
From WWI to the late 1940s, fighter pilots wore hats made of canvas, cloth, or leather for protection. The advent of the jet age required a different approach to the fighter pilot’s helmet. Today’s fighter pilot helmets now do more than provide protection; they can actually help a pilot become a better pilot. A fighter […]
Welders need eye protection to prevent damage from ultraviolet light. Welding helmets have a darkened eye shield and lens hood, but auto darkening helmets are popular. They use a light sensor and come in solar or battery powered versions. Regular inspection is necessary to prevent exposure to UV light. Any type of welding requires advanced […]
Welders need eye protection to prevent damage from ultraviolet light. Welding helmets have a darkened eye shield, and auto darkening helmets are popular. They use a light sensor to darken the lens when welding light is detected. Solar-powered helmets have advantages over battery-powered ones. Regular inspection is necessary to ensure no cracks in the lens […]
The God’s Helmet, created by Stanley Koren under the direction of Dr. Michael Persinger, uses magnetic fields to stimulate the temporal lobes of the brain, leading to religious and mystical experiences. Test subjects report feeling a presence or seeing visions, but results vary. The device raises questions about the nature of religious experiences and their […]
Mining helmets protect from hazards in mines. Early helmets were made of canvas and glue, later materials included aluminum, fiberglass, and injected thermoplastic. Suspension systems prevent helmets from falling and provide impact resistance. Some helmets have built-in lamps or accessory slots for lamps and other accessories. A mining helmet is a type of headgear designed […]
When choosing a blasting helmet, fit is important but other aspects such as ventilation, eye protection, and an oxygen system for fresh air are crucial. The best helmets also protect against airborne contaminants and incorporate a hard hat and earphones. Removable and replaceable eye protection and head supports are also important features. There are several […]
When choosing a blasting helmet, fit is important but other aspects such as ventilation and eye protection are also crucial for safety. The best helmets protect against both flying debris and harmful airborne contaminants, and may include an oxygen system and a large eyepiece. A helmet with a hard hat and earphones can provide additional […]
The pith helmet, also known as a topi or solar topee, was originally developed for military personnel stationed in the tropics. It later became part of formal military dress and is still worn today for various professions and as a fashion item. The helmet was made of lightweight pith or cork and covered with a […]
The space helmet is an iconic symbol of space exploration and is necessary for survival in space. It fulfills three main purposes: maintaining pressure, supplying oxygen, and providing protection. Most helmets are hard-shelled and bubble-shaped with a visor system that protects against harmful rays. Communication devices are also built into the helmet or worn separately. […]
