PPL » Aircraft Tech Knowledge (A) » Take-off Performance
12.102 Take-off Performance
12.102.2 Given typical performance data, demonstrate the ability to determine TODR
To determine Take-Off Distance Required (TODR), use the aircraft’s performance charts or data and apply any required corrections.
Basic Method
1. Start with the aircraft’s basic take-off distance
From the POH/AFM chart, using:
- Aircraft weight
- Pressure altitude / density altitude
- Temperature
This gives the base take-off distance.
2. Apply corrections for conditions, such as:
- Headwind / tailwind
- Runway slope
- Runway surface (grass, wet, soft, sealed)
- Flap setting
- Obstacles / clearway requirements
3. Add safety factor if required
(As specified by operating rules or manufacturer)
Example
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