Take-off and landing
Factor the flight manual distances for today's conditions and check them against the runway.
Runway
Declared distances from the AIP. Leave a field blank to skip that check.
Aeroplane
Flight manual: take-off 503 m, landing 358 m (to or from 50 ft) at 1,107 kg.
Flight manual figures
Unfactored figures: sea level, 15°C, nil wind, level, dry, paved. The run and roll are optional. They add the take-off run check and the accelerate-stop estimate.
Warrior II POH (VB-1180) charts at 2,440 lb: short-field take-off with flaps 25°, lift-off 52 KIAS, 57 KIAS at 50 ft; landing flaps 40°, 63 KIAS approach. Earlier 2,325 lb Warriors: about 503 m to 50 ft and 354 m to land.
Factors
Switch on each factor that applies today.
From mass and balance: take-off 965 kg, landing 941 kg. Change the load
+20% take-off and +10% landing for each 10% above the reference weight.
Pressure altitude 307 ft, ISA +1°C, density altitude 379 ft
+10% take-off and +5% landing for each 1,000 ft, and again for each 10°C above ISA.
Grass factors apply to grass up to 20 cm long. A wet paved runway affects only the landing.
Runway 27: 7 kt head, 4 kt cross from the left
+20% for each 5.2 kt of tailwind (10% of the 52 kt lift-off speed). A headwind gets no credit.
Applied after all the other factors. The CAA strongly recommends it for private flights. Switch it off only if your figures are already factored.
Result: runway 27
503 m × 1.04 × 1.01 × 1.20 × 1.33 = 843 m
Take-off run: about 588 m. The real effect on the run or roll can be greater.
358 m × 1.02 × 1.01 × 1.15 × 1.43 = 607 m
Landing roll: about 310 m. The real effect on the run or roll can be greater.
Flight manual Conditions Safety factor Available
Accelerate-stop estimate: 998 m. This is the runway you need to stop after a rejected take-off at rotation.
Working
| TO | LDG | |
|---|---|---|
| Weighttake-off 965 kg, at or below the 1,107 kg reference (no credit taken); landing 941 kg, at or below the 1,107 kg reference (no credit taken) | ×1.00 | ×1.00 |
| Elevationpressure altitude 307 ft | ×1.04 | ×1.02 |
| TemperatureISA +1°C | ×1.01 | ×1.01 |
| SurfaceDry grass (up to 20 cm) | ×1.20 | ×1.15 |
| Wind7 kt headwind (no credit taken) | ×1.00 | ×1.00 |
| Safety factorapplied last, as for commercial operations | ×1.33 | ×1.43 |
Compare runway 09
Runway 27 · 7 kt head, 4 kt cross from the left
TO 843 mLDG 607 m
Runway 09 · 7 kt tail, 4 kt cross from the right
TO 1,071 mLDG 770 m
The same wind and slope from each end. Check the crosswind against the demonstrated limit separately.
The CAA factors (SSL 09, Aug 2024)
| TO | LDG | |
|---|---|---|
| 10% increase in weight | ×1.20 | ×1.10 |
| 1,000 ft increase in elevation | ×1.10 | ×1.05 |
| 10°C increase in temperature | ×1.10 | ×1.05 |
| Tailwind of 10% of lift-off speed | ×1.20 | ×1.20 |
| 2% slope, uphill | ×1.10 | none |
| 2% slope, downhill | none | ×1.10 |
| Dry grass (up to 20 cm) | ×1.20 | ×1.15 |
| Wet grass (up to 20 cm) | ×1.30 | ×1.35 |
| Wet paved surface | none | ×1.15 |
| Soft ground or snow | ×1.25 | ×1.25 |
| Safety factor (after the others) | ×1.33 | ×1.43 |
"It is not recommended to operate if the factored distances required exceed those available." Your flight manual governs. Factors from CAA Safety Sense Leaflet 09 and the Skyway Code (CAP 1535).
The theory is in the performance section of the Aircraft Technical study guide.