Reading a book about the Allied bombing campaign against the Axis powers at the moment - it was interesting to read that the Lancaster could carry five times as much bomb load as the B17 Flying Fortress, but this at a cost of being relatively flimsy compared to the B17 that could endure brutal damage and limp home.
Guess it’s just as well that the Lancaster was largely used as a night time bomber.
Images of damaged B-17 that made it home by miracle
www.warhistoryonline.com
View attachment 59599View attachment 59600
I think you'll find that the Lanc was every bit as robust as the B17. It had to be to carry such a large bombload.
The B17 was an over engineered medium bomber, designed from the beginning to survive high level daylight bombing, bombload was secondary....hence the design allows for better survivability while carrying a larger crew wielding heavier 0.5 cal and some 20mm defensive armament.
The Lanc was a derivative of a medium bomber up-engineered to be a full heavy. The concept of the Lanc was from the very beginning to be capable of carrying the most bomb load that it could on medium level night time missions. All other considerations were secondary....hence the pitiful .303 defensive armament (obsolete the moment they were fitted to the first Lancs) wielded by a much smaller crew. A lack of resources, compared to the Americans, meant that compromises had to be made in the design and so the strength of the aircraft structure was in it's ability to carry such a large bombload..... crew survivability features were not considered priority, even down to only having one pilot.
Lancs performed on many daylight raids, but due to their poor defensive capabilities they were easier prey against 20mm and 30mm armed fighters, which could attack from the extreme range of the Lancs 0.303 turrets with relative safety. Had they fitted them with 0.5 cal armament and a ball turret then it might have been different, but it would've been slower, less maneouverable and the bombload would've suffered. Plus they flew lower than the B17s, which put them in range of far more flak.
One of the biggest differences between daylight missions and night ones was the type of enemy aircraft and the tactics used. Daylight raids were up against lighter aircraft who's pilots main tactic was fast, fleeting diving attacks. Night time raids were up against heavier armed aircraft who's pilots tactics allowed for a slower, more deliberate method of attack. A single burst from a dedicated nightfighter positioned a 100m or so behind was sufficient to rip a Lanc apart, whereas it could often take several diving attacks to do significant damage to a B17.
The other main difference was in the operational heights that they flew at. The B17 could fly above the range of most of the deadliest flak. The feared 88mm had a typical vertical range of about 10,000m and B17's would typically fly at or above that. The Lanc's operational ceiling was lower, which meant that it didn't have that luxury for most of the war.
Both aircraft were excellent designs at what they did and complemented each others efforts.