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-   -   Climb Performance Terps Vs Far25 (https://www.airlinepilotforums.com/technical/35994-climb-performance-terps-vs-far25.html)

terpster 01-21-2009 07:24 PM
Climb Performance Terps Vs Far25
 
Terps requires 3.3% climb gradient or as published and far 25 requires 2.4% in the 2nd segment and 1.2% in the final segment (2 engine aircraft). Assume a 500/500/500 take off and no published climb gradient. At what altitude should you clean up and accelerate to enroute climb speed MVA/MSA/MEA or a training profile altitude 400/1500 AGL? Assume no airport analysis and AFM shows greater than 3.3% to a safe altitude.

Seems to me that your 2nd segment configuration will give the least horizontal flight path to a safe altitude since far 25 doesn't consider terrain environment.

Thanks for your responses.

b18onboost 01-21-2009 10:57 PM
test
 
deleted for personal reason

KC10 FATboy 02-05-2009 10:04 PM
You are confusing what TERPS says an aircraft must climb to takeoff and avoid obstacles (if no obstables are listed) and what Part 25 says an aircraft must be able to achieve as designed.

rickair7777 02-06-2009 07:58 AM
Originally Posted by KC10 FATboy (Post 553267)
You are confusing what TERPS says an aircraft must climb to takeoff and avoid obstacles (if no obstables are listed) and what Part 25 says an aircraft must be able to achieve as designed.
FAR 25 is for transport category aircraft, so you would THINK those standards would be set with IFR operations in mind...but maybe not.

My guess is that all transport category aircraft can easily exceed that 2.4% climb gradient...it's just a design minimum.

aterpster 03-16-2009 06:06 AM
Originally Posted by terpster (Post 542534)
Terps requires 3.3% climb gradient or as published and far 25 requires 2.4% in the 2nd segment and 1.2% in the final segment (2 engine aircraft). Assume a 500/500/500 take off and no published climb gradient. At what altitude should you clean up and accelerate to enroute climb speed MVA/MSA/MEA or a training profile altitude 400/1500 AGL? Assume no airport analysis and AFM shows greater than 3.3% to a safe altitude.

Seems to me that your 2nd segment configuration will give the least horizontal flight path to a safe altitude since far 25 doesn't consider terrain environment.

Thanks for your responses.
Apples and oranges. TERPs is for normal ops. One engine inoperative (OEI) is covered by FAR 121.189, which in turn, refers to the Part 25 takeoff flight path.


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