Boeing 737-800 takeoff and landing performance, from your SimBrief OFP

Every takeoff number you enter into the FMC

• V1, VR and V2 for flaps 1, 5, 10, 15 and 25. OPTIMUM checks them all and picks the flap that leaves the most runway margin.
• Assumed temperature, and the 26K, 24K and 22K thrust ratings.
• V1(MCG) from the 737 QRH as the floor under V1 at 26K; 24K and 22K use the FCOM values.
• All three distances checked against the runway: all engines, engine failure and continue, and accelerate-stop, against TORA, TODA and ASDA.
• Inoperative items from the MEL with their performance penalties.

Landing speed and distance from the QRH

VREF for flaps 15, 30 and 40 comes from the 737 QRH table for your landing weight. You get the required distance factored for dispatch and the unfactored distance you can expect on the day, with autobrake 1, 2, 3 or MAX and reverse thrust, and next to it the QRH normal landing distance. On landing you can enter the runway condition code, which reads the QRH braking action tables. The briefing also predicts which exit you will make.

Non-normal landings

Sixteen non-normal configurations from the 737 QRH are in, such as the loss of hydraulic system A or B, one engine inoperative, manual reversion and a landing with all flaps up. Pick one and the approach speed and landing distance follow the QRH, with the flap setting the checklist asks for.

Brake cooling after the landing and after a rejected takeoff

SkyNexus reads the 737 QRH brake cooling schedule: the energy per brake, the cooling time on the ground and in flight with the gear down, and whether you end up in the caution or fuse plug melt zone. It works for carbon and steel brakes.

Where the numbers come from

The model uses Boeing documentation, the 737 QRH and the open-source OpenAP performance library, and it is checked against published tables. Every number has a help button that explains how it was worked out. The Enroute tab and a 737 handbook in the QRH tab are not there yet. This is a tool for flight simulation and learning. Never use it for a real aircraft.

Flying an Airbus?

• A320 and A320neo performance with FLEX, OPTIMUM flap and the engine-out procedure.
• A321 and A321neo performance with QRH landing distances and failures for both types.

737-800 performance FAQ

Is the 737-800 performance calculator free?

Yes. Create an account, enter your SimBrief Pilot ID and the performance tab is there for every 737-800 flight plan.

Which 737-800 does it model?

A 737-800 with CFM56-7B26 engines, which you get with SimBrief type code B738. Because the inputs come from SimBrief rather than from the add-on, it works alongside any 737-800, such as the PMDG 737 or the Zibo mod. Add-ons with other engines or weights can show small differences.

Does it support the 737 MAX?

Not yet. The 737-800 is the only Boeing with a performance model.

How accurate is it?

It is checked against published Boeing tables and every calculation step is explained in the app. It is accurate enough to fly a realistic departure in the sim. It is not certified and must never be used for real flights.

Can I use it without SimBrief?

You can try the app with the built-in demo flight. For your own 737 flights it needs a SimBrief flight plan, which gives it the weight, runway and weather.