Originally Posted by
OntimeexceptACARS
Wonder if most were day flights as I have in my flight log (as SLF) HER-GLA on 31 August 1984, non stop on G-AVRO, one of Britannia's original four from 1968! Full flight but block times were 0500L off chocks, and 0735L on chocks, block time of 4h35. Cooler ambient temps aiding endurance, presumably.
Much later, FWIW, 12 Oct 1991, MCO-GLA non stop on leased Boeing 757 G-BTEJ. I have flight time of 18:54L dep, 07:16arr, 7h20min, guess not that unusual for a 757. Apologies for thread drift.
OTEA
Cooler ambient temps would create a lower true airspeed.
G-AVRO wasactually delivered in 1969, these slightly later aircraft had a higher max gross take off weight