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Confused about Speedbugs

Featured Replies

2 hours ago, JRBarrett said:

I believe the speed cards are just PDF files, and the one that is selected is the one closest to your current takeoff weight.  They are all referenced to Flap 15.

I almost always use Flex power settings, and dial-a-flap at considerably less than 15 degrees - both calculated with Topcat using the current takeoff runway and weather conditions. I use the Topcat calculated V speeds too.

I have taken off with flap set as low as 3 degrees, which means the VR/V2 will be quite a bit higher than on the speed cards.

Makes for a longer takeoff run, but better acceleration in the climb - especially at airports like KATL where all the SIDS require aircraft to accelerate to 250 knots as quickly as possible.

The bugs on the airspeed indicator will move to the V speeds entered in the FMS.

Nope - also the CG setting will change on the card according to what is noted in the Load Manager.

System: i7-10700K, 32GB RAM, RTX4070 12GB, 1 x 1TB SSD, 2 x 2TB SSD, 1x 2TB HDD, Win10 64bit Home, Meta Quest 3

6 hours ago, GSproson said:

The speed card is selected by the weight you enter in the FMC.

Good to know. Thanks for the info.

FAA: ATP-ME, 737 CA, enough time in the 757/767 to be dangerous 🤠

Matt Kubanda, 7950X3D, 64GB RAM, RTX 5090@4k, MSFS 2024

 

 

 

5 hours ago, Wothan said:

Nope - also the CG setting will change on the card according to what is noted in the Load Manager.

If that’s the case, some of the text on the cards must be dynamically created based on FMS or Load Manager settings. I have not used the cards, since I normally use Topcat for performance calculations.

Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

CAN  I manually set the bugs, they're not matching what TOPCAT is giving me

Ron Hamilton

 

"95% is half the truth, but most of it is lies, but if you read half of what is written, you'll be okay." __ Honey Boo Boo's Mom

11 hours ago, fakeflyer737 said:

CAN  I manually set the bugs, they're not matching what TOPCAT is giving me

Check my post on the last page. 

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