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What APG offers is a OEI climb capability for a specific procedure that allows you to clear terrain IAW TERPS terrain seperation criteria vs FAA terrain seperation criteria.
When you refer to APG, are you referring to runway analysis, or some other product?
When using a runway analysis, the actual clearance over every obstacle is 35' (net path). Note, I am not referring to 35' over a gradient, but 35' over an obstacle.
Before using runway analysis numbers to takeoff, think about whether you really want to be in IMC, on a single engine, clearing obstacles by only 35'.
Also, keep in mind that the lateral boundaries when using a runway analysis "escape procedure" are significantly narrower than the lateral boundaries specified in TERPS/PANS-OPS.
When you refer to APG, are you referring to runway analysis, or some other product?
When using a runway analysis, the actual clearance over every obstacle is 35' (net path). Note, I am not referring to 35' over a gradient, but 35' over an obstacle.
Before using runway analysis numbers to takeoff, think about whether you really want to be in IMC, on a single engine, clearing obstacles by only 35'.
Also, keep in mind that the lateral boundaries when using a runway analysis "escape procedure" are significantly narrower than the lateral boundaries specified in TERPS/PANS-OPS.
APG allows you to demonstrate to the FAA that on your very worst day, you could lose an engine at V1 while still on the runway, takeoff and not hit any obstacles, albiet, clearing them only by the TERPS terrain seperation criteria. Lose an engine at 100 feet and one would suppose that your terrain clearance would continue to be 100 feet greater than the TERPS 35ft, lose it at 200 ...... on and on (based on TERPS criteria of 200ft per NM). It does not guarantee that you won't have to replace both pilots seat cushions.:blush:
Runway Analysis has absolutely nothing to do with TERPS criteria.***** They shouldn't even be mentioned in the same sentence.
*****
35 ft of terrain separation up to 1500ft.***** It has nothing to do with "per NM". In other words from the ground up, while using a runway analysis procedure at the weights specified, you will clear obstacles by 35 feet.
You're correct, a runway analysis procedure is nowhere near as safe as waiting for the weather to improve. Also interesting is that the escape procedures are never test flown; they're developed via computer software, and then released.