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)
Sheet layout at random bend angle
FAA-H-8083-31 (AMT Airframe chap. 4 'Aircraft Metal Structural Repair') and AC 43.13-1B chap. 4
Rivet length and head form for solid rivets
AC 43.13-1B chapter 4 (riveting) and FAA-H-8083-31 (AMT Airframe)
Centre of gravity as percentage of MAC
FAA-H-8083-1 (Aircraft Weight and Balance Handbook) %MAC
Move or add weight to correct the centre of gravity
FAA-H-8083-1 (Aircraft Weight and Balance Handbook) weight shift and weight addition
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.