Work it out.
Calculators
Weight and balance (centre of gravity)
Momentligevægt (moment = vægt × arm)
Fuel – volume to weight
Densitet ved 15 °C (Jet A-1 ASTM D1655 · Avgas 100LL ASTM D910)
Ohm's law and power
Ohms lov (U = R·I, P = U·I)
Flat blank length for 90° bending
AC 43.13-1B afsnit 4-56 (opsætning) + klassisk bukkefradrags-formel (Aviation Maintenance Technician-lærebøger)
Rivet pitch and edge distance (single row)
AC 43.13-1B afsnit 4-57(c)(1) (nitning – enkeltrække)
Tightening torque with lubrication (nut factor)
T = K·D·F (nøgletal-formel for boltforspænding, maskinteknik)
Torque conversion: Nm, ft-lb and in-lb
Enhedsomregning (1 lbf·ft = 1,3558179483 N·m, eksakt definition)
Torque wrench with extension/adapter
Momentarms-princip (F × arm) for momentnøgle-adaptere/crowfoot
Voltage drop in a wire (AWG)
AWG-diameterstandard (ASTM B258) + kobbers resistivitet (IACS, 20 °C) — jf. AC 43.13-1B kap. 11's spændingsfaldsgrænser
Minimum bending radius for electrical wires and cables
AC 43.13-1B kapitel 11 (el-installation – ledningsbøjning)
Battery capacity and discharge time
Grundlæggende elektrokemi (kapacitet = strøm × tid)
Differential pressure compression test (leakage percentage)
Lycoming Service Instruction 1191A (stempelmotor-kompressionstest ved 80 psi testtryk)
Pressure altitude and density altitude
ICAO/FAA Standardatmosfære (ISA) + FAA tommelfingerregel for densitetshøjde (FAA-P-8740-2)
Pressure compensation for temperature change (gas cylinder/tyre)
Gay-Lussacs lov (P/T = konstant ved konstant volumen) — jf. FAA AC 20-97B / Michelin-tommelfingerregel for dæktryk
Propeller – static balance moment
Fysik: moment = masse × arm (statisk propel-balancering)
Wheel arch repair panel
Exact flat pattern
Tools that work in all subjects
Whatever your programme is called, these tools calculate the same — Pythagoras, area, percentages and units are not tied to one trade.
- Pythagorasa² + b² = c²Find the missing side, set out a right angle, check whether a room is square, and find the space diagonal.
- Area and perimeterm²Rectangle, triangle, trapezium, circle and composite shapes — area and perimeter.
- Volume and surface aream³ · lBox, cylinder, cone, sphere, pyramid, prism, pipe and frustum — also in litres.
- Percent%Percentage of, how many per cent, percentage change, discount and VAT.
- Scale and ratios1 : 50From drawing to reality, area and volume to scale, the rule of three and dividing in a ratio.
- Unit convertermm ↔ mFrom mm to km, Pa to bar and kB to GB — with the unit staircase.
- Time calculations and the clockt : minTime between two clock times, add time, and 1.75 h = 1 h 45 min for the timesheet.
- Slope and fall% · ° · 1:xFall from level to level, in per cent, per mille, degrees and mm per metre — and the height difference.
- Material consumption including wastem² + %Boards, paint, battens at c/c spacing and packs — for a composite surface or a whole room, with waste.