View Full Version : Bouncing Bomb release mechanism

09-15-2011, 12:12 AM
Hi All. I am about to start gathering information about the "Dambusters raid" which will be the content of a power point presitation which i intend to do for my military history society later this year.I have checked on line for pre and post raid photographs and also maps and there are many to choose from, so thats sorted.

The only problem is finding a drawing or diogram of the bombs carrying,rotation, and release mechanism, the best i can find is only a external photo of the bomb slung under a Lancaster, i know that the bomb was held or clasped by what looks like a large calipers which incorporated a dog clutch driven by a hydraulic motor and cranked up to 500rpm before release.This would help explain the the workings of this unique bomb, and the way it was to be delivered to its target. I would appriciate if someone can help me find these details. Cheers. JM.

09-15-2011, 12:26 AM
AFAIK the rotation of the bomb was opposite to the direction of travel, so that it would 'skid' along the water and not dig in.
I vaguely remember seeing a 60s/70s picture of the whole mechanism (could have been in those WAR series collections) somewhere. I'll have a look through my garage.

09-15-2011, 01:36 AM
How much detail do you require? I seem to recall finding an image of the mechanism, but I'll have to find it. Here's what I could find online.


Apparently the calipers were spring loaded to swing out and the normal bomb release mechanism held the arms together. The hydraulic pump which normally actuated the bomb-bay doors was used to spin the mine/bomb.

The hydraulic motor in the picture is in the wrong spot. It should be more forward, and the bomb release mechanism should be where the motor is illustrated.

This image makes the same mistake!


09-15-2011, 01:47 AM
Some more stuff. Don't know if it's helpful or not:



09-15-2011, 02:50 AM
Thanks Luno.Could you tell me what site these drawings are from, I notice they are in German, they did find one intact so this must have come from their inspection ? JM.