Dial A Flap and FLEX

[Senchai 24]

Littlebit offtopic, kinda, kinda not.

I saw that Leonardo now has a flex to calculator to download on the website in the download section.

http://www.flythemaddogx.com/en/media.html

 

[regis9 4,004]

So tonight topcat gave me a flap setting of 0...this was at KORD rwy 28R which clocks in at 13,000’.

I assumed this meant a slats only take off, so I set the flaps handle to the 0 detent.  On take off I got a flaps warning.  Googling this i came across a Spanair flight that crashed due to forgetting to set any takeoff flaps.

So did I miss something with this one or is topcat trying to virtually kill me? 😀

[G550flyer 1,011]

You can depart 0 flaps, the thing is that you have to ensure you are using the right speeds for that configuration and have the setting set in the takeoff condition computer window next to the CG window on the pedestal. Two crashes resulted from the flaps and slats being retracted. Slats are the big item in an aircraft. They allow the air to continue to stick to the top of the wing at high angle of attack. Without the slats guiding air over the wing, air separates and lift is instantly lost. Flaps wouldn't even help in that situation. So in reality, you shouldn't get a warning as long as the slats are extended and the takeoff condition flap dial represent your current condition. This is how you tell the aircraft the flaps you are using for takeoff. 

[regis9 4,004]

Thanks again Rick, looking back I didn't set the dial a flap to 0, so that would explain it.  Topcat gave me:

D-TO: +50C

V1: 148

Vr: 169

V2: 173

The aircraft nose was actually pulling up off of the runway before I reached Vr...trim was set correctly (I think...I'm still learning a lot about this aircraft :) )

[FormerSF3 15]

On 3/14/2018 at 9:05 PM, regis9 said:

Thanks again Rick, looking back I didn't set the dial a flap to 0, so that would explain it.  Topcat gave me:

D-TO: +50C

V1: 148

Vr: 169

V2: 173

The aircraft nose was actually pulling up off of the runway before I reached Vr...trim was set correctly (I think...I'm still learning a lot about this aircraft :) )

That's a little high for 28R.  Use flap 6 and subtract about 10 kts off your speeds.  138 - 159 - 163.

[regis9 4,004]

Thanks, I thought that a Vr of 169 seemed very high.

[FormerSF3 15]

Here’s one for 145,000 6R KCLE

06R  Flap 08 Trim 5.6 CG 13.8

V1-146  VR-149 V2-157   Use assumed 41C