hand -operated propeller

简明释义

手操推进器

英英释义

例句

1.During the workshop, we learned how to build a model airplane using a hand-operated propeller 手动螺旋桨 to generate thrust.

在研讨会上，我们学习了如何使用手动螺旋桨 手动螺旋桨构建模型飞机以产生推力。

2.The inventor showcased his latest design of a hand-operated propeller 手动螺旋桨 that could be used in emergency situations.

发明家展示了他最新设计的手动螺旋桨 手动螺旋桨，可用于紧急情况。

3.For the children's science project, they created a simple boat powered by a hand-operated propeller 手动螺旋桨.

为了儿童科学项目，他们制作了一艘由手动螺旋桨 手动螺旋桨驱动的简单小船。

4.The fishing kayak featured a hand-operated propeller 手动螺旋桨 that allowed anglers to navigate quietly.

这款钓鱼皮划艇配备了一个手动螺旋桨 手动螺旋桨，使钓鱼者能够安静地航行。

5.The small boat was equipped with a hand-operated propeller 手动螺旋桨 for easy maneuvering in shallow waters.

这艘小船配备了一个手动螺旋桨 手动螺旋桨，便于在浅水区灵活操作。

作文

In the world of aviation and marine engineering, various mechanisms are utilized to provide propulsion for different types of vehicles. One such mechanism is the hand-operated propeller, which serves as a fascinating example of how simple mechanical devices can still play an essential role in modern technology. This type of propeller is manually controlled, allowing users to generate thrust by using their hands to turn the blades, making it an interesting study in both mechanics and human interaction with machines.The hand-operated propeller can be found in various applications, from small model airplanes to certain types of watercraft. For instance, hobbyists often use these propellers in remote-controlled boats or planes, where simplicity and ease of use are paramount. The design of a hand-operated propeller typically includes lightweight materials that enable easy handling and maneuverability. This makes it an ideal choice for beginners who are just starting to explore the world of aerodynamics and hydrodynamics.One significant advantage of a hand-operated propeller is its accessibility. Unlike motorized propellers that require fuel, batteries, or complex electrical systems, a hand-operated propeller relies solely on human effort. This aspect not only makes it cost-effective but also environmentally friendly, as it eliminates the need for fossil fuels or electricity. Additionally, it encourages users to engage physically with the device, fostering a deeper understanding of the principles of flight and propulsion.Moreover, the hand-operated propeller serves as an educational tool. In classrooms and workshops, instructors can demonstrate basic physics concepts such as thrust, lift, and drag using these simple devices. Students can experiment with different designs and configurations, learning through trial and error. This hands-on approach can ignite a passion for engineering and technology among young learners, inspiring the next generation of innovators.However, while the hand-operated propeller has many benefits, it also comes with limitations. The amount of thrust generated is directly proportional to the strength and endurance of the person operating it. This means that while it is suitable for small-scale applications, it may not be practical for larger vehicles or more demanding environments. In such cases, motorized propellers are preferred due to their ability to produce consistent and powerful thrust without requiring continuous physical effort.In conclusion, the hand-operated propeller is a remarkable invention that highlights the intersection of human capability and mechanical design. Its simplicity and effectiveness make it a valuable tool in various fields, including education and hobbyist activities. By understanding how to operate and optimize a hand-operated propeller, individuals can gain insight into the fundamental principles of propulsion, paving the way for further exploration in the realms of aviation and marine engineering. As technology evolves, the lessons learned from these basic mechanisms will undoubtedly continue to influence more complex innovations in the future.

在航空和海洋工程的世界中，各种机制被用来为不同类型的车辆提供推进力。其中一种机制就是手动操作螺旋桨，它作为一个迷人的例子展示了简单机械装置如何在现代技术中仍然发挥重要作用。这种类型的螺旋桨是手动控制的，允许用户通过用手转动叶片来产生推力，使其成为机械学和人机互动研究中的一个有趣案例。手动操作螺旋桨可以在各种应用中找到，从小型模型飞机到某些类型的水上交通工具。例如，爱好者通常在遥控船或飞机中使用这些螺旋桨，其中简单性和易用性至关重要。手动操作螺旋桨的设计通常包括轻量材料，使其易于处理和操控。这使其成为刚开始探索空气动力学和水动力学的初学者的理想选择。手动操作螺旋桨的一个显著优势是其可获取性。与需要燃料、电池或复杂电气系统的电动螺旋桨不同，手动操作螺旋桨完全依赖于人类的努力。这一方面不仅使其具有成本效益，而且也环保，因为它消除了对化石燃料或电力的需求。此外，它鼓励用户与设备进行身体上的互动，从而促进对飞行和推进原理的更深入理解。此外，手动操作螺旋桨还作为一种教育工具。在教室和工作坊中，讲师可以利用这些简单设备演示基本的物理概念，如推力、升力和阻力。学生们可以尝试不同的设计和配置，通过试验和错误学习。这种动手的方式能够激发年轻学习者对工程和技术的热情，启发下一代创新者。然而，尽管手动操作螺旋桨有许多优点，但也存在局限性。产生的推力与操作它的人的力量和耐力成正比。这意味着，虽然它适用于小规模的应用，但在更大的车辆或更具挑战性的环境中可能不实用。在这种情况下，由于电动螺旋桨能在不需要持续体力努力的情况下产生一致且强大的推力，因此更受欢迎。总之，手动操作螺旋桨是一项了不起的发明，突显了人类能力与机械设计的交汇。其简单性和有效性使其在教育和爱好活动等多个领域成为一种有价值的工具。通过了解如何操作和优化手动操作螺旋桨，个人可以深入理解推进的基本原理，为进一步探索航空和海洋工程领域铺平道路。随着技术的发展，从这些基本机制中学到的经验教训无疑将继续影响未来更复杂的创新。