{"id":100088,"date":"2026-02-15T20:17:34","date_gmt":"2026-02-15T20:17:34","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100088"},"modified":"2026-02-15T20:17:34","modified_gmt":"2026-02-15T20:17:34","slug":"fan-blade-centrifugal-force","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/bn\/calculators\/fan-blade-centrifugal-force\/","title":{"rendered":"\u09aa\u09be\u0996\u09be \u09ac\u09cd\u09b2\u09c7\u09a1 \u0995\u09c7\u09a8\u09cd\u09a6\u09cd\u09b0\u09c0\u09af\u09bc \u09ac\u09b2 \u0995\u09cd\u09af\u09be\u09b2\u0995\u09c1\u09b2\u09c7\u099f\u09b0 | ID\/FD \u09aa\u09be\u0996\u09be"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Fan Blade Centrifugal Force Calculator\",\"alternateName\":[\"ID Fan Force Calculator\",\"FD Fan Blade Force\",\"Centrifugal Force Calculator\"],\"description\":\"Free online calculator for fan blade centrifugal force. Computes force per blade (N and kN), force-to-weight ratio, total force for all blades, and tip speed for ID and FD fans.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/fan-blade-centrifugal-force\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2025-01-01\",\"dateModified\":\"2026-02-15\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"featureList\":[\"Force per blade in N and kN\",\"Total force all blades\",\"Force-to-weight ratio\",\"Tip speed calculation\",\"Auto-calculation on input change\",\"ID\/FD fan presets\"],\"keywords\":\"fan blade, centrifugal force, ID fan, FD fan, tip speed, force-to-weight\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How is centrifugal force on a fan blade calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Centrifugal force F = m \u00d7 R \u00d7 \u03c9\u00b2, where m is blade mass in kg, R is the distance from the rotation axis to the blade center of gravity in meters, and \u03c9 = 2\u03c0\u00b7n\/60 is angular velocity in rad\/s. The result is in Newtons.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the force-to-weight ratio and why does it matter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The force-to-weight ratio is centrifugal force divided by the blade weight (m\u00d7g). It tells you how many times the gravitational force the blade experiences. A ratio of 1000 means the blade 'feels' 1000\u00d7 its own weight. This is critical for blade root stress, fastener design, and fatigue life assessment.\"}},\n{\"@type\":\"Question\",\"name\":\"What is a safe tip speed for industrial fans?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Typical maximum tip speeds: carbon steel impellers 80\u2013120 m\/s, stainless steel 60\u201390 m\/s, aluminum 100\u2013150 m\/s, FRP\/fiberglass 60\u201380 m\/s. Higher tip speeds increase centrifugal stress and noise. Critical applications may limit tip speed to 60 m\/s.\"}},\n{\"@type\":\"Question\",\"name\":\"Why do ID fans experience more centrifugal force than FD fans?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ID (Induced Draft) fans typically handle hot, dirty gas and have larger, heavier blades at greater radii than FD (Forced Draft) fans. Combined with similar or higher speeds, this results in significantly greater centrifugal forces on ID fan blades.\"}},\n{\"@type\":\"Question\",\"name\":\"How does centrifugal force relate to fan balancing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Centrifugal force from unbalance (uneven mass distribution) causes vibration. Even a small mass difference between blades creates a net unbalance force at the shaft. Proper balancing ensures the centrifugal forces from all blades cancel out, leaving minimal net force on the bearings.\"}}\n]}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Fan Blade Centrifugal Force\",\"item\":\"https:\/\/vibromera.eu\/calculators\/fan-blade-centrifugal-force\/\"}\n]}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link 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16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-fan-blade-force\">\n\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Fan Blade Centrifugal Force Calculator<\/h1>\n    <p class=\"vc-header-subtitle\">Calculate centrifugal force on fan blades for ID and FD fans. Get force per blade, total force, force-to-weight ratio, and tip speed.<\/p>\n    <div class=\"vc-badges\">\n        <span class=\"vc-badge\">ID \/ FD Fans<\/span>\n        <span class=\"vc-badge\">Force per Blade<\/span>\n        <span class=\"vc-badge\">Tip Speed<\/span>\n    <\/div>\n<\/header>\n\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-mass\">Blade Mass <span class=\"vc-label-hint\">(kg)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-mass\" inputmode=\"decimal\" step=\"any\" min=\"0.001\" placeholder=\"e.g. 15\" value=\"15\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-radius\">Blade CG Radius <span class=\"vc-label-hint\">(mm, from axis)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-radius\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 800\" value=\"800\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-speed\">Fan Speed <span class=\"vc-label-hint\">(RPM)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-speed\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 1485\" value=\"1485\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-blades\">Number of Blades <span class=\"vc-label-hint\">(optional)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-blades\" inputmode=\"numeric\" step=\"1\" min=\"1\" placeholder=\"e.g. 12\" value=\"\">\n            <\/div>\n        <\/div>\n\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"15\" data-r=\"800\" data-s=\"1485\" data-b=\"\">ID fan blade 15kg R=800mm 1485RPM<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"8\" data-r=\"600\" data-s=\"990\" data-b=\"\">FD fan blade 8kg R=600mm 990RPM<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"2\" data-r=\"300\" data-s=\"2950\" data-b=\"\">Small fan 2kg R=300mm 2950RPM<\/button>\n        <\/div>\n    <\/form>\n\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\">\n            <h2 class=\"vc-results-title\">Results<\/h2>\n            <button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\">\n                <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg>\n                Copy\n            <\/button>\n        <\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\">\n                <div class=\"vc-rcard-label\">Force per Blade<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-force\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Force per Blade (kN)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-forcekn\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Force-to-Weight Ratio<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-ratio\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Total Force (All Blades)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-total\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Tip Speed<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-tipspeed\">\u2014<\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Theory -->\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\ud83d\udcd8<\/span>\n            <span class=\"vc-section-title\">Theory &amp; Formulas<\/span>\n        <\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner vc-theory\">\n            <h3>Centrifugal Force on a Fan Blade<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <ul>\n                <li><strong>m<\/strong> \u2014 blade mass (kg)<\/li>\n                <li><strong>R<\/strong> \u2014 distance from axis to blade CG (m) \u2014 enter in mm, converted internally<\/li>\n                <li><strong>\u03c9<\/strong> = 2\u03c0\u00b7n\/60 \u2014 angular velocity (rad\/s)<\/li>\n            <\/ul>\n\n            <h3>Force-to-Weight Ratio<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n\n            <h3>Tip Speed<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-3\"><\/div>\n            <p>Tip speed is calculated using the blade CG radius. For actual impeller tip speed, use the outer tip radius.<\/p>\n\n            <h3>Practical Example<\/h3>\n            <div class=\"vc-example-box\">\n                <div class=\"vc-example-title\">Example \u2014 ID Fan Blade<\/div>\n                <p><strong>Given:<\/strong> Blade mass = 15 kg, CG radius = 800 mm, Speed = 1485 RPM<\/p>\n                <p>\u03c9 = 2\u03c0 \u00d7 1485 \/ 60 = 155.5 rad\/s<\/p>\n                <p>F = 15 \u00d7 0.8 \u00d7 155.5\u00b2 = <strong>290,340 N = 290.3 kN<\/strong><\/p>\n                <p>Force\/Weight = 290,340 \/ (15 \u00d7 9.81) = <strong>1,972\u00d7<\/strong><\/p>\n                <p>Tip speed at CG = 0.8 \u00d7 155.5 = <strong>124.4 m\/s<\/strong><\/p>\n            <\/div>\n\n            <div class=\"vc-warning-box\">\n                <p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary);\"><strong>\u26a0\ufe0f Note:<\/strong> These forces are per blade acting on the blade root. The net force on bearings depends on balance quality \u2014 ideally, all blade forces cancel. Mass differences between blades create the unbalance force measured during balancing.<\/p>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Related -->\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\ud83d\udd17<\/span>\n            <span class=\"vc-section-title\">Related Calculators<\/span>\n        <\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-related\">\n                <a class=\"vc-related-link\" href=\"\/calculators\/residual-unbalance-iso1940\/\">Residual Unbalance (ISO 21940)<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/foundation-vibration-from-machine\/\">Foundation Vibration<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/propeller-unbalance\/\">Propeller Unbalance<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/centrifuge-g-force\/\">Centrifuge G-Force<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/trial-weight-calculator\/\">Trial Weight Calculator<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- FAQ -->\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\u2753<\/span>\n            <span class=\"vc-section-title\">Frequently Asked Questions<\/span>\n        <\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-promo\">\n    <div class=\"vc-promo-text\">\n        <strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>\n        Professional field balancing instruments for fans, blowers, and impellers. Reduce vibration and extend bearing life on-site.\n    <\/div>\n    <a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a>\n<\/div>\n\n<footer class=\"vc-footer\">\n    <p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p>\n    <p style=\"font-size:12px;margin-top:4px;\">Calculator #244. Last updated: February 2026<\/p>\n    <div class=\"vc-footer-links\">\n        <a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a>\n        <a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a>\n    <\/div>\n<\/footer>\n\n<\/div>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function() {\n    'use strict';\n    var SLUG = 'fan-blade-centrifugal-force';\n    function $(id) { return document.getElementById(id); }\n    function fmt(n, d) { if(isNaN(n)||!isFinite(n)) return '\u2014'; var f=n.toFixed(d===undefined?2:d); return f.replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,''); }\n\n    function calculate() {\n        var mass = parseFloat($('vc-mass').value);\n        var radius = parseFloat($('vc-radius').value);\n        var speed = parseFloat($('vc-speed').value);\n        var blades = parseInt($('vc-blades').value);\n\n        if (!mass || mass <= 0 || !radius || radius <= 0 || !speed || speed <= 0) {\n            $('vc-results').classList.remove('vc-visible');\n            return;\n        }\n\n        var R_m = radius \/ 1000; \/\/ mm to m\n        var omega = 2 * Math.PI * speed \/ 60;\n        var force = mass * R_m * omega * omega; \/\/ N\n        var forceKN = force \/ 1000;\n        var weight = mass * 9.81;\n        var fwRatio = force \/ weight;\n        var tipSpeed = R_m * omega; \/\/ m\/s\n\n        $('vc-r-force').innerHTML = fmt(force, force < 100 ? 1 : 0) + ' <span class=\"vc-rcard-unit\">N<\/span>';\n        $('vc-r-forcekn').innerHTML = fmt(forceKN, forceKN < 10 ? 2 : 1) + ' <span class=\"vc-rcard-unit\">kN<\/span>';\n        $('vc-r-ratio').innerHTML = fmt(fwRatio, 0) + ' <span class=\"vc-rcard-unit\">\u00d7 g<\/span>';\n\n        if (blades && blades > 0) {\n            var totalForce = force * blades;\n            $('vc-r-total').innerHTML = fmt(totalForce, 0) + ' <span class=\"vc-rcard-unit\">N<\/span> <span class=\"vc-rcard-unit\">(' + blades + ' blades \u00d7 ' + fmt(forceKN, 1) + ' kN)<\/span>';\n        } else {\n            $('vc-r-total').innerHTML = '<span class=\"vc-rcard-unit\">Enter blade count above<\/span>';\n        }\n\n        $('vc-r-tipspeed').innerHTML = fmt(tipSpeed, 1) + ' <span class=\"vc-rcard-unit\">m\/s<\/span>';\n\n        $('vc-results').classList.add('vc-visible');\n\n        var u = new URL(window.location);\n        u.searchParams.set('mass', mass); u.searchParams.set('radius', radius);\n        u.searchParams.set('speed', speed);\n        if (blades && blades > 0) u.searchParams.set('blades', blades);\n        history.replaceState(null, '', u.toString());\n\n        saveHistory({ mass:mass, radius:radius, speed:speed, blades:blades||'',\n            _summary: 'm=' + mass + 'kg, R=' + radius + 'mm, ' + speed + 'RPM' });\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn) {\n        btn.addEventListener('click', function(e) {\n            e.preventDefault();\n            $('vc-mass').value = this.getAttribute('data-m');\n            $('vc-radius').value = this.getAttribute('data-r');\n            $('vc-speed').value = this.getAttribute('data-s');\n            $('vc-blades').value = this.getAttribute('data-b');\n            calculate();\n        });\n    });\n\n    $('vc-form').addEventListener('input', calculate);\n    $('vc-form').addEventListener('change', calculate);\n\n    $('vc-copy-btn').addEventListener('click', function() {\n        var text = 'Fan Blade Centrifugal Force Calculation\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            'Blade Mass: ' + $('vc-mass').value + ' kg\\n' +\n            'CG Radius: ' + $('vc-radius').value + ' mm\\n' +\n            'Speed: ' + $('vc-speed').value + ' RPM\\n' +\n            'Force per Blade: ' + $('vc-r-force').textContent + '\\n' +\n            'Force (kN): ' + $('vc-r-forcekn').textContent + '\\n' +\n            'Force\/Weight: ' + $('vc-r-ratio').textContent + '\\n' +\n            'Total Force: ' + $('vc-r-total').textContent + '\\n' +\n            'Tip Speed: ' + $('vc-r-tipspeed').textContent + '\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            'vibromera.eu\/calculators\/fan-blade-centrifugal-force\/';\n        if (navigator.clipboard) {\n            navigator.clipboard.writeText(text).then(function() {\n                var btn = $('vc-copy-btn');\n                btn.classList.add('vc-copied');\n                btn.innerHTML = '<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';\n                setTimeout(function() { btn.classList.remove('vc-copied'); btn.innerHTML = '<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy'; }, 2000);\n            });\n        }\n    });\n\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            var section = this.closest('.vc-section');\n            section.classList.toggle('vc-open');\n            this.setAttribute('aria-expanded', section.classList.contains('vc-open'));\n        });\n    });\n\n    var faqData = [\n        { q: 'How is centrifugal force on a fan blade calculated?', a: '<p>Centrifugal force F = m \u00d7 R \u00d7 \u03c9\u00b2, where m is blade mass in kg, R is the distance from rotation axis to blade center of gravity in meters, and \u03c9 = 2\u03c0\u00b7n\/60 is angular velocity in rad\/s. The result is in Newtons.<\/p>' },\n        { q: 'What is the force-to-weight ratio and why does it matter?', a: '<p>Force-to-weight ratio is centrifugal force divided by blade weight (m \u00d7 g). It shows how many times gravitational force the blade experiences. A ratio of 1,000 means the blade \"feels\" 1,000\u00d7 its own weight \u2014 critical for blade root stress and fastener design.<\/p>' },\n        { q: 'What is a safe tip speed for industrial fans?', a: '<p>Typical limits:<\/p><ul><li><strong>Carbon steel:<\/strong> 80\u2013120 m\/s<\/li><li><strong>Stainless steel:<\/strong> 60\u201390 m\/s<\/li><li><strong>Aluminum:<\/strong> 100\u2013150 m\/s<\/li><li><strong>FRP\/fiberglass:<\/strong> 60\u201380 m\/s<\/li><\/ul><p>Higher tip speeds increase centrifugal stress and noise.<\/p>' },\n        { q: 'Why do ID fans experience more centrifugal force than FD fans?', a: '<p>ID (Induced Draft) fans handle hot, dirty gas requiring larger, heavier blades at greater radii. Combined with similar or higher speeds, this creates significantly greater centrifugal forces than smaller FD (Forced Draft) fan blades.<\/p>' },\n        { q: 'How does centrifugal force relate to fan balancing?', a: '<p>Centrifugal force from unbalance (uneven blade mass distribution) causes vibration. Even a small mass difference between blades creates a net force on bearings. Balancing ensures all blade forces cancel, leaving minimal net force at the shaft.<\/p>' }\n    ];\n    var faqList = $('vc-faq-list');\n    faqData.forEach(function(faq) {\n        faqList.innerHTML += '<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>' + faq.q + '<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">' + faq.a + '<\/div><\/div><\/div>';\n    });\n    faqList.addEventListener('click', function(e) { var btn = e.target.closest('.vc-faq-q'); if (!btn) return; btn.closest('.vc-faq-item').classList.toggle('vc-open'); });\n\n    function saveHistory(entry) {\n        var key = 'vc_history_' + SLUG; var arr = [];\n        try { arr = JSON.parse(localStorage.getItem(key)) || []; } catch(e) {}\n        entry._ts = new Date().toISOString(); arr.unshift(entry);\n        if (arr.length > 10) arr = arr.slice(0, 10);\n        try { localStorage.setItem(key, JSON.stringify(arr)); } catch(e) {}\n    }\n\n    function loadParams() {\n        var p = new URLSearchParams(window.location.search);\n        p.forEach(function(v, k) { var el = $(k) || $('vc-' + k); if (el) el.value = v; });\n    }\n\n    function renderFormulas() {\n        try {\n            katex.render('F = m \\\\times \\\\frac{R}{1000} \\\\times \\\\omega^2 \\\\quad [N]', $('vc-katex-1'), { displayMode: true, throwOnError: false });\n            katex.render('\\\\text{Ratio} = \\\\frac{F}{m \\\\times g} = \\\\frac{R \\\\cdot \\\\omega^2}{g} \\\\quad [\\\\times g]', $('vc-katex-2'), { displayMode: true, throwOnError: false });\n            katex.render('v_{tip} = R \\\\times \\\\omega \\\\quad [m\/s]', $('vc-katex-3'), { displayMode: true, throwOnError: false });\n        } catch(e) {}\n    }\n\n    function init() { loadParams(); renderFormulas(); calculate(); }\n    if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init); } else { init(); }\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Free online calculator for fan blade centrifugal force. Enter blade mass, CG radius, speed, and number of blades to get force per blade, total force, force-to-weight ratio, and tip speed for ID and FD fans.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100088","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100088\/revisions"}],"predecessor-version":[{"id":100421,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100088\/revisions\/100421"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/media?parent=100088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/categories?post=100088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/tags?post=100088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}