Helicopter IGE & OGE Hover Ceiling Performance Calculator
Calculate In-Ground-Effect (IGE) vs. Out-of-Ground-Effect (OGE) hover ceilings and density altitude limits.
Input Parameters
Calculation Results
Visual Growth Breakdown
Formula & How Helicopter IGE & OGE Hover Ceiling Performance Calculator Works
In-Ground-Effect (IGE) hover occurs when the helicopter is within one rotor diameter of the ground (typically 3–5 ft skid height), where ground surface interference reduces induced flow and tip vortices, requiring ~15–20% less engine power than Out-of-Ground-Effect (OGE) hover in free air.
- Enter Helicopter Model Preset: Input your target parameter value.
- Enter Aircraft Gross Weight (kg) (kg): Input your target parameter value.
- Enter Takeoff / Landing Pressure Altitude (ft) (ft PA): Input your target parameter value.
- Enter Outside Air Temperature OAT (°C) (°C): Input your target parameter value.
- Apply Formula: Calculate using
DA = PA + 120 × (OAT - ISA) | Max IGE/OGE = Base Ceiling + Weight Correction | Margin = Max Ceiling - DA. - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
What is the difference between IGE and OGE hover?
IGE (In-Ground-Effect) hover benefits from ground cushion aerodynamics that reduce induced drag, allowing the helicopter to hover at higher altitudes and heavier weights than in OGE (Out-of-Ground-Effect) free air hover.
Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
CASR Part 91 general operating and flight rules, Part 121 fuel reserves, and flight crew licensing standards.
Aviation weather services, standard atmosphere (ISA) profiles, METAR/TAF aerodrome weather reports.
Aeronautical Information Publication (AIP), En Route Supplement Australia (ERSA), and airspace procedures.
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