May 20, 20188 yr Hi, On most LIDO charts, there tends to be a runway threshold, or TDZ, elevation shown. For example, in EGLL, runway 09R it says: 79 / 3hPa (assumingly indicating runway threshold height) So my question is, what does the Pressure after the elevation mean? Does this mean it Changes with 3ft every hPa change? So, let's say if you're entering the TDZ elevation in to your Head-up System, should you enter an elevation of 79ft Always, or correct it based on the Pressure difference? Thanks. Marcus Haraldsson
May 20, 20188 yr https://www.scribd.com/doc/110905773/Lido-Legends-and-Tables-PDF for now, cheers john martin
May 20, 20188 yr It's an info on how to convert between QFE and QNH. QNH = QFE + differential ( 3 hPa in your example ) Flying gliders since 1980 Flightsimming since 1992 AMD Ryzen 5600x, 32GB RAM, GPU Nvidia RTX 3060 Ti 8 GB, 1 TB and 500 GB nvme2 SSD drives, HP 27" 60Hz LED monitor @ 1920x1080, T16000, Hotas from old X52 Pro, Saitek Combat Rudder Pro (2010 model)
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