John Anderson;149107 wrote: As I understand it the delivery method with back spin was in order that the bomb would end up as close as possible to the dam wall. The subsequent explosion and shock wave generated via the water would then weaken the dam wall and cause it to fail. It was expected to take several bombs to achieve this at each target.
In the film Wallis says, 'I had hoped one bomb would do it'. This must be based on fact.
The bomb used at the Nant-y-Gro dam in the Elan Valley was one fifth of the size of Upkeep as Wallis had calculated the relative ratios of the two dams. It did the job.
I guess the bottom line was that the detonation had to take place at exactly the right place for maximum effect. It seems that the first bomb (Gibson's) exploded when it hit the second of the two anti-torpedo nets.
Plan A is always more effective when the problem you are working on understands that Plan B will involve the use of dynamite .
Tony Hancock made a reference to Bill's part in the film in one of the Hancock's Half Hour programmes. Bill was a regular in the radio series and I can't remember if it was scripted or unscripted but I think it was a reference related to Bill's absence from the programme.
As Hancock had a very poor retentive memory when it came to scripts, the reference to Bill Kerr's part in the film was almost certainly within the script. His 'script memory' was one of Hancock's weaknesses; if a fellow actor began ad libbing, it really scared Hancock, as he had to stick to the lines he'd learned.
Reminds me of the time I was walking my dogs, "Blackie" and "max" one sunday morning along a road with a wood bordering the road in deepest rural Norfolk, and dogs being dogs decided to investigate the wood.
After a while "Max" came back but "Blackie" was nowhere to be seen. So there I am shouting at the top of my voice. "Blackie Blackie here! Then suddenly there appeared out of the wood a dark skinned couple with their children who had been out for a sunday walk. I think I asked them if they had seen my dog, guess my face was red though
The Damm dog did not come back till after they had gone.
Yeh !! I had a completely Black Labrador, being a big Dambuster fan I should have called her "Nigger" in the end I called her "Bess" as in Dick Turpin's Horse. Chicken springs to mind
The 75th anniversary of the raid is later this month and this letter was in Leo Lane's paperwork. I cannot find his reply to Barnes Wallis. Boddington who is mentioned was the MI5 officer responsible for Upkeep and Highball security during the weapons trials.
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