Anyone have a good v-ref speed / flap setting for longitude??

 

Thanks

Was wondering the same.  I seem to get stall stall stall with full flaps and even around 140 kias.  That's gotta be too fast I would think.  Though it does have a delta style wing.  It's hard finding a flight manual for these larger jets.  I would think 120-130 kias with full flaps (depending on weight of course) would be a good final speed.

FWIW landing distance says 3850.  I feel like that's hard to achieve with the current approach speed/AoA

Edited August 20, 20205 yr by ryanbatcund

Yeah I'm getting the same issue, hoping someone here has nailed it down, Going to have to mess with the flap settings and speeds and see what works best I guess but yeah it seems a little too fast right now.

Edited August 20, 20205 yr by rfelger

From AOPA https://www.aopa.org/news-and-media/all-news/2015/november/pilot/t_latitude

Quote

At our relatively light takeoff weight of 23,684 pounds—about 6,000 pounds below the airplane’s max takeoff weight—the airspeeds were bugged for a flaps-2 takeoff: V1 was 104 knots, VR was 105, V2 was 117, and our engine-out initial climb was 180 knots.

Quote

For the landings on Eisenhower National’s Runway 19L it was full flaps and gear down at the final approach fix, with ATs set to an approach speed of 120 knots. I kicked off the autopilot and got to sample the roll and pitch forces in rowdy thermals. Every time airspeed is gained, the ATs come back; every time airspeed nods off, they power up. The main thing is that they nail airspeed unerringly. On short final, Wuertz selected our VREF of 96 knots and the ATs retarded some more. At 50 feet agl, they automatically disconnect and power goes to idle. A disembodied female voice calmly says “Autothrottle”—meaning the ATs are off and it’s all yours, buddy.

Of course there are a lot of unknowns such as landing weight (close to 20,000 lbs), Temp and PA, however you would think that most approaches to a near 1,000' airport would be in the ballpark. Clearly stall warnings at 140 KIAS would be a reason to submit a Zendesk report and I would include all of the relevant information and the AOPA article as a reference. 

I would also recommend trying some full flap stalls at landing weight and note the airspeed at the first indication at prestall (warning.) If it is 140 KIAS at around 20,000 lbs then clearly Asobo needs to refine the flight dynamics. 

Quote

Limiting and recommended airspeeds
V_R (rotation), flaps 2 | 107 KIAS
V₁ (takeoff decision speed) | 106 KIAS
V_MCA (min control w/one engine inop, air), flaps 1 | 88 KIAS
V_MCA flaps 2 | 83 KIAS
V₂ (takeoff safety speed) | 115 KIAS
V_FE (max flap extended), flaps 1 | 250 KIAS
flaps 2 | 200 KIAS
full flaps | 175 KIAS
V_LE (max gear extended) | 210 KIAS
V_LO (max gear operating) | 210 KIAS
V_REF (reference speed, final approach) | 108 KIAS
V_MO (max operating speed, 8,000 ft to 29,833 ft) | 305 KIAS
V_MO (max operating speed, SL to 8,000 ft) | 270 KIAS
M_MO (max Mach number, 29,833 ft and above) | 0.80 M

Best of luck with Zendesk and be prepared for major disappointment. 

On 8/20/2020 at 7:05 AM, KenG said:

From AOPA https://www.aopa.org/news-and-media/all-news/2015/november/pilot/t_latitude

....

Does anyone have the specs for the Longitude? (not the Latitude)

Using the longitude fde mod, I’m generally on approach around 140 knots, final in the 120’s bleeding off until touch down. Full flaps. Put like 460 hours on mine in FSE. I fly it a lot lol.

Edited July 2, 20223 yr by CaptainNick

To Robert Felger and Ryan, are you using this mod? (For Ryan, note that it does not work with all third party liveries):

https://flightsim.to/file/3655/asobo-cessna-citation-longitude-flight-dynamics-modifications-project-version-1-0

As Nick said above, approach at 140 kts and 120 kts VRef+5 kts before touching down will be OK with full flaps. Also do you select/activate the TO and landing speeds in the left hand CDU (or Garmin Touch Screen Control Panels)?

Landing distance is more like between 3200 to 3400 feet depending on altitude.

Perhaps you want to read this pilot report on a test flight of the Longitude, it is most informative. You can also go to SmartCockpit.com and look for the Longitude file.

Edited July 3, 20223 yr by Bernard Ducret