انجمن علمی مهندسی اویونیک | United States America (US)

Create: 2025-06-06 Update: 2025-07-14 14:28:08

• نشان‌دهنده سرعت عمودی یا به انگلیسی (Vertical Speed Indicator یا VSI) یکی از ابزارهای مهم در کابین خلبان است که به خلبان کمک می‌کند تا تغییرات ارتفاع هواپیما را در زمان واقعی مشاهده کند. این دستگاه معمولاً به صورت عقربه‌ای یا دیجیتال نمایش داده می‌شود و سرعت تغییر ارتفاع را به صورت فوت در دقیقه (FPM) یا متر در دقیقه (MPM) نشان می‌دهد.

• عملکرد VSI بر اساس اصل فشار هوا است. وقتی که هواپیما به سمت بالا یا پایین حرکت می‌کند، فشار هوا در داخل یک محفظه خاص تغییر می‌کند و این تغییر فشار باعث حرکت عقربه یا نمایشگر می‌شود.

• نشاندهنده VSI به خلبان اطلاعاتی درباره‌ی صعود یا نزول هواپیما می‌دهد و به او کمک می‌کند تا کنترل دقیقی بر ارتفاع خود داشته باشد و از بروز مشکلاتی مانند سقوط ناگهانی یا صعود بیش از حد جلوگیری کند.

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انجمن علمی مهندسی اویونیک

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انجمن علمی مهندسی اویونیک

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Should I buy bitcoin?

“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.

• نشان‌دهنده سرعت عمودی یا به انگلیسی (Vertical Speed Indicator یا VSI) یکی از ابزارهای مهم در کابین خلبان است که به خلبان کمک می‌کند تا تغییرات ارتفاع هواپیما را در زمان واقعی مشاهده کند. این دستگاه معمولاً به صورت عقربه‌ای یا دیجیتال نمایش داده می‌شود و سرعت تغییر ارتفاع را به صورت فوت در دقیقه (FPM) یا متر در دقیقه (MPM) نشان می‌دهد.

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