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What is Airbus flex temp?
Flex temp is a technique used to produce cost savings through increased engine life and reduced overhaul and fuel costs for airliners by allowing them to take-off at less than rated thrust. For Airbus and Fokker aircraft the technique is known as flex temp or just flex.
What is Airbus flex takeoff?
An assumed temperature takeoff (also known as “flex” on Airbus/Fokker aircraft) is where the engine thrust is reduced to match the performance on a higher-temperature day, up to either the maximum thrust reduction allowed or the maximum assumed temperature that meets takeoff distance requirements.
What is Flex thrust?
Flex thrust essentially takes advantage of the spread between the actual weight at the actual temperature and whatever the maximum temperature for that weight would be. Assume, for example, that we are preparing for takeoff from an airport with an outside air temperature (OAT) of 10 degrees C.
What does SRS runway mean?
SRS (Speed Reference System): Mode used at takeoff, or Go- Around to maintain SRS speed (V2, V2+10, VAPP …). RWY (Runway): Mode used at takeoff to guide the aircraft along the runway centerline, using LOC. FLEX/TOGA: The selected thrust rating.
What does man flex mean?
MAN FLX is the callout for flex temp/derated takeoff. This will be TOGA callout instead if takeoff is with TOGA power. SRS- Speed Reference system. It means that the Flight director pitch guidance will be based on speed, usually V2+10 knots. It is useful as a guide for your pitch on initial climbout.
What is Tmax Flex?
TMAX is the Max OAT certified for take-off. So to make a FLEX take-off you must have your Assumed Temp sitting Above TREF and Below TMAX. TOGA take-off must be made if you cannot achieve a Temp greater than TREF. Also you must never Take-off at a given Aerodrome when the OAT is greater than the listed TMAX.
What is a flex departure?
“FLEX” is the standard takeoff thrust setting used on Airbus aircraft, unless departing a contaminated (wet / icy) runway or if performance constraints (short runway or hot and high) exist, in which case TOGA (full thrust) is used.
How do you calculate the flex temp on a plane?
Can anyone explain how you calculate this. When you calculate a Flex temp you have to take into account many variables for example the runway length, the temperature, the pressure settings all these come into account when calculating the flex temp.
How to calculate the flex temp in the B717?
I would like to share my little knowledge with you. In the B717 there are two types of reduced thrust: * Limit thrust: is a % lower of thrust for the total thrust in the current OAT or FLEX/Assume Temperature. TO1 -10% TO2 -20% .
What is the formula or equation to finding flex temperature and V-speeds?
What is the formula or equation to finding flex temperature and V-Speeds? The RTOW (regulatory takeoff weight) charts are runway and configuration specific, so the length and slope (and permanent obstacles) and all taken care of (see red box below).
Is there a specific formula or way to calculate flex?
The RTOW (regulatory takeoff weight) charts are runway and configuration specific, so the length and slope (and permanent obstacles) and all taken care of (see red box below). There is no manual formula, either the charts or a performance calculator such as the Airbus FOVE or the company’s proprietary software.