Weapons Systems Tech.Discuss FN 50 Center Turrent in the Technical forums; FN 50 Center Turret for a British Lancaster. I'm sure one of our ammo experts can explain more about ...
with the extra weight of heavier guns at 11m from the verticle datum point, to maintain the CoG you'd definately need to reduce the number of rounds carried...
it's a trade off.. a ballancing act
You could of course keep the number of rounds the same and ballance the plane up by adding larger guns and ammo at the front, but with these being so much nearer the verticle datum point you'd also have to add large amount of ballast (lead weight) in the nose...
And although your plane would now be ballanced within acceptable parameters it's now a lot heavier, so reducing the amount of ordnance or fuel you can take.
with the extra weight of heavier guns at 11m from the verticle datum point, to maintain the CoG you'd definately need to reduce the number of rounds carried...
it's a trade off.. a ballancing act
You could of course keep the number of rounds the same and ballance the plane up by adding larger guns and ammo at the front, but with these being so much nearer the verticle datum point you'd also have to add large amount of ballast (lead weight) in the nose...
And although your plane would now be ballanced within acceptable parameters it's now a lot heavier, so reducing the amount of ordnance or fuel you can take.
Simon
Um. Would that be why the Martin .50 turret in the Canadian built Lancs was 10 feet forward of the FN turret and carried less rounds.
In The Fire Brigade we tend to say...
It is a shyte load heavier, move it forward.
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You're just jealous because the voices only talk to me.
Well moving the turret further towards the datum point certainly reduces it's moment... I don't think tho that the 0.5in turret was moved 10ft... more 4ft...
I've heard it was moved forward for various reasons.... it's physical size is so much bigger than the 303 turret requiring greater fuselage width and also depth for the crew (if needing to use the loo) to crawl underneath.
Sometime this week if I get the chance I'll do the calcs and work out just how many rounds of .5" the Lanc could carry if they'd left the turret in the same position as the 303....
Reading with interrest your information on the cannon armed Lancasters as I am researching my wife grandfather Sgt J Reid, a mid upper Lancaster gunner. He recalls testing a Lancaster cannon turret in 1943/44 and not liking it at all, too cramped and vibration problems. He cannot recall what Squadron he was with or where he was testing it (he's 88 years old) but believes it was in Lincolnshire. Can anyone help with details and or some photographs of the aircraft concerned?
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, like the .5 vickers or the .5 Browning.
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