Mechanical Engineering Toolkit vs Aviel Support

Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results — with calculation steps, formulas, diagrams, and unit conversions shown along the way. Switch between SI and Imperial units anytime, save favorites, and find the right tool fast with recommendations by major. Save your inputs as named projects, and export any result as text, image, CSV or PDF. Categories and tools: Mechanics of Material • Moments of inertia of plane areas • Force-displacement relation of a bar • Torsion formula and angle of twist • Flexure formula of a beam • Transverse shear stress • Deflections and slopes of cantilever and simple beams • Plane stress transformation and Mohr's circle • Principal stresses and planes • Spherical shell and thin-walled pressure vessel stresses • Buckling load of a column • Thermal deformation and stress • Combined loading • Bolted / riveted joints • Fatigue safety factor • Shaft power and torque Statics • Centroid of an area • Resultant of a force system • Beam reactions • 2D truss analysis Machine Design • Helical compression springs • Spur gear geometry and stresses • Shaft fatigue design (DE-Goodman) • Bearing L10 life • Belt and chain drives • Bolt preload / torque-tension • Fillet weld strength • Press / shrink-fit interference • Shaft critical speed (Dunkerley) • Beam natural frequency (five end conditions) • Torsional natural frequency (one or two rotors) Fluids & Thermal • Reynolds number and flow regime • Pipe pressure drop (Darcy-Weisbach with Colebrook) • Pump and fan power • Composite wall conduction • Fin efficiency • Heat exchanger sizing by LMTD Theory of Elasticity • Constitutive relation of linear elastic material • Stress/strain of linear elastic material Composite Material • Lamina and laminate stress/strain • Lamina engineering constants • Laminate plane and 3D properties • Rule of mixtures • Failure criteria (Tsai-Hill, Tsai-Wu) Reference Tables • Drill & tap chart (metric and imperial thread series) • ISO 286 fits & tolerances • Standard sections (AISC W, IPE, HEB) • Unit converter No account required. Works offline. Available in English, Chinese, German, French, and Japanese.

Aviel Support is your pocket AV technician. Whether you're wrangling a home theater, a small venue's sound system, or a rack of production gear, Aviel Support helps you troubleshoot equipment problems fast, without waiting on hold or digging through manuals. HOW IT WORKS - Add your AV equipment: manufacturer, model, and a nickname so it's easy to find. - Describe the issue you're running into, in plain language. - Get a clear, step-by-step troubleshooting guide generated for your exact equipment and problem, and work through it one step at a time. - Track firmware versions and get notified when your gear might be due for an update. WHO IT'S FOR Aviel Support is built for anyone who owns or manages audio, video, or lighting (AV/AVL) equipment: home theater owners, event and production crews, house of worship tech teams, small venues, and IT or facilities staff who get called when the projector won't turn on or the mixer stops passing audio. FEATURES - Equipment tracker for all your AV gear in one place - AI-powered, step-by-step troubleshooting tailored to your equipment and issue - Firmware tracking and update notifications - Secure account with password reset and full account deletion support SUBSCRIPTION Aviel Support offers auto-renewing subscription plans at $4.99/month or $50/year. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your Apple ID account settings. See our Terms & Conditions and Privacy Policy for full details. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/