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The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the Bell Boeing V-22 Osprey developed jointly by Bell Helicopter and Boeing.The concept is a contender in the U.S. Army's Joint Heavy Lift program (a part of Future Vertical Lift program).
Quadcopter coaxial – OnyxStar FOX-C8 XT Observer from AltiGator. In order to allow more power and stability at reduced weight, a quadcopter, like any other multirotor can employ a coaxial rotor configuration. In this case, each arm has two motors running in opposite directions (one facing up and one facing down). [citation needed]
The study involved 200 aircrew members, and identified a pattern of acute and chronic symptoms among affected aircrew, including headaches, dizziness, breathing problems, and vision problems. These symptoms can have a significant impact on the health and well-being of aircrew, potentially affecting their ability to perform their duties safely ...
These recurrent seizure episodes pose a higher risk of death for children. [4] Children should be treated with proper and effective therapy to prevent irreversible neural damage. [5] Treatment options for epilepsy include medications, diet, and surgery. [6] Diet and surgery are considered for children who have medication resistant epilepsy. [7]
Unlike single- and double-rotor helicopters which use complex variable pitch rotors whose pitch varies as the blade rotates for flight stability and control, multirotors often use fixed-pitch blades; control of vehicle motion is achieved by varying the relative speed of each rotor to change the thrust and torque produced by each.
Symptoms: Usually none, still, abdominal pain, nausea, tired and weak feeling, slight jaundice may present [1] Complications: Usually none [1] Causes: Genetic [1] Differential diagnosis: Crigler–Najjar syndrome, Rotor syndrome, Dubin–Johnson syndrome [2] Treatment: None typically needed [1] Frequency ~5% [3]
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Toxic shock syndrome (TSS) is a condition caused by bacterial toxins. [1] Symptoms may include fever, rash, skin peeling, and low blood pressure. [1] There may also be symptoms related to the specific underlying infection such as mastitis, osteomyelitis, necrotising fasciitis, or pneumonia.