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Convair CV-640 · N3411 · SMB Stage Lines

Convair CV-640 illustration in SMB Stage Lines livery Illustrative image; it may differ from the actual aircraft.

Convair CV-640

CV340-31Written off
RegistrationUSN3411
Verified aircraft dataagainst the official civil aviation registerWhat does this badge mean?We checked that this aircraft’s registration, serial number and model match the official civil aviation register: FAA (United States), data as of Oct 8, 2026.That makes its identity more reliable. The verification expires after 12 months: if the register stops confirming it, the badge disappears.How we verify
OperatorSMB Stage Lines
5operators
0incidents
0accidents
0logbook years
0photos

Convair CV-640. Operated for Braniff International, Caribair and Zantop International Airlines.

Vuelopedia is a work in progress: it currently holds about 30% of the information we expect to have by the third quarter of 2027. Although we use only official, highly reliable sources, some aircraft data and history may still contain errors or inaccuracies. We work hard to clear every anomaly from the records using specialized verification tools.

Technical data

ManufacturerConvair
Country of registrationEstados Unidos
MSN31
VerificationIdentity verified against the official register of FAA (United States) · Oct 8, 2026

The model · Convair CV-340 / 440

Figures for the CV-440 Metropolitan variant, the most representative of the family

Length24.1 m79 ft
Wingspan32.1 m105 ft
Height8.6 m28 ft
Range2,092 km1,130 NMWith a typical passenger load
Cruise speed465 km/h251 ktMach 0.44
Service ceiling7,590 m24,902 ft
Maximum take-off weight22,544 kg49,701 lb
Maximum payload7,433 kg16,387 lbIts 44 passengers with baggage would weigh about 4.4 t; the rest is fuel and cargo
Typical capacity44 passengersUp to 52 in a high-density layout
Endurance4 h 30 minAt cruise speed, non-stop

The type first flew in 1951 (75 years ago) · About 510 units built · Production ended in 1958

Figures for the type, not for this particular aircraft: each variant and each configuration changes something. They are shown in both systems used in aviation.

The full story of the Convair CV-340 / 440 Compare this aircraft

Flight logbook

Under research

Aircraft chronology

Dec 16, 1952
Delivered to Braniff International
Delivered to Braniff International as N3411.
Jun 10, 1966
Transferred to Caribair
Transferred to Caribair.
May 15, 1973
Transferred to Eastern Air Lines
Transferred to Eastern Air Lines.
Jan 18, 1982
Transferred to SMB Stage Lines
Transferred to SMB Stage Lines.

Operators

1952-12-16
Braniff International
Registration N3411
1966-06-10
Caribair
Registration N3411
1973-05-15
Eastern Air Lines
Registration N3411
1982-01-18
SMB Stage Lines
Registration N3411
—

In memoriam

This aircraft suffered a serious accident or hull loss. Out of respect for what happened and for the people who may have been affected, this record does not enable the register of memories.

Cite

To cite this page in academic work, an article or Wikipedia, choose the style and copy the reference. The access date is today.

This page was last updated on October 10, 2026

APA

Vuelopedia. (2026, October 10). Convair CV-640 · N3411 · SMB Stage Lines. Retrieved October 17, 2026, from https://vuelopedia.org/en/aircraft/CV340-31

MLA

“Convair CV-640 · N3411 · SMB Stage Lines.” Vuelopedia, Fundación Poderia, 10 Oct. 2026, vuelopedia.org/en/aircraft/CV340-31. Accessed 17 Oct. 2026.

Chicago

Vuelopedia. “Convair CV-640 · N3411 · SMB Stage Lines.” Fundación Poderia. Last modified October 10, 2026. https://vuelopedia.org/en/aircraft/CV340-31.

Harvard

Vuelopedia (2026) Convair CV-640 · N3411 · SMB Stage Lines. Available at: https://vuelopedia.org/en/aircraft/CV340-31 (Accessed: 17 October 2026).

BibTeX

@misc{vuelopedia_en_aircraft_cv340_31,
  author       = {{Vuelopedia}},
  title        = {{Convair CV-640 · N3411 · SMB Stage Lines}},
  publisher    = {Fundación Poderia},
  year         = {2026},
  date         = {2026-10-10},
  url          = {https://vuelopedia.org/en/aircraft/CV340-31},
  howpublished = {\url{https://vuelopedia.org/en/aircraft/CV340-31}},
  urldate      = {2026-10-17},
  note         = {Accessed 2026-10-17}
}

Wikipedia

{{cite web |url=https://vuelopedia.org/en/aircraft/CV340-31 |title=Convair CV-640 · N3411 · SMB Stage Lines |website=Vuelopedia |publisher=Fundación Poderia |date=2026-10-10 |access-date=2026-10-17 |language=en}}