Fuze types and their uses

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Having written the Laymans guide to bomb fuzes , i decided it might be a good idea to specify more fully the individual fuzes , and the likely bombs that they would be fitted to.and where possible add notes of interest. 


                        ( 0 )  Protective fuzes

Zus 40  Pattern 1    Anti witdrawl device that was usually fitted under the (17) long delay fuze, made of aluminum used in 250/500 Kg bombs

Zus 40 Pattern 2   Similar to above but made in plastic and  redesigned and incorperating three knife edges designed to make extraction difficult

Zus 40 Pattern 3   Same as above incorperating three knife edges but made of Mazak  (Pictures of these can be seen in A laymans Guide to bomb Fuzes)

 ( 50 )   Anti disturbance fuze used in conjunction with the (17) fuzed bombs could be used in any bomb 50 Kg upwards.This device became armed after bomb has come to rest.

( 50 ) B Y    Designed to Explode when being defuzed,contained a seperate circuit powered by batteries and containining mercury tilt switches, which only became active after the bomb came to rest, used in 250 Kg bombs.

( 60 )     Clockwork air burst fuze used in drop containers.

( 70 )     Anti disturbance fuze produced for the SD2 butterfly bomb , active after impact.

( 70 )B       As above , but bayonet fitting

( 70 )B/1    As above ,used in the SD2B butterfly bomb

( 70 )B2     As above , Bayonet fitting. 

( 80 )          Used in amongst other bombs the HS233 Glider bomb and the FZG76 or commonly known V1 flying bomb (one of 3 fuzes used in the V1)

 ( 80 ) A       Similar to above but external  lower portion is not threaded

                      Series  (1 )  Mechanical impact Fuzes

( 41 )       Fuze used in the SD2 butterfly bomb,this screwed into fuze pocket.

( 41 )A     As above but Bayonet fitting

( 41 )B     As above but the arming vanes are vee shaped

                       Series ( 2 )  Mechanical Impact Fuzes

( 12 )A    Electron  Nose fuze used in 1 Kg incendiary bombs

                       Series ( 3 )  Mechanical impact Fuzes

( 13 )A      Steel  Nose fuze used on incendiary bombs

( 13 )*     As above used on incendiary bombs

( 63 )       Fitted inside the Exploding nose incendiary bomb, contained Bickford cord.

( 73 ) A2      Used on the SD1 Brass construction

( 73 ) A2      As above but made of Mazak

( 73 ) A3      Used on the SD1 bomb

( 73 ) A4      As above but unthreaded

( 73 ) B2    Slightly different design for the SD1

AZ c10 ( hut)  3   Nose fuze used on the SD10 bombs

                       Series ( 4 ) Special Fuzes

( 24 )A    Designed to function if the bomb case was ruptured  ie Broken up,found mainly in the larger bombs1000 and 2500 Kg  

( 34 )A    Mine fuze used in parachute mines

(  34 )B    As above used on parachute mines ,but with  design changes incorperating mechanical bellows

                      Series ( 5 ) Electrical impact fuzes

( 5 )   Pattern 1    This  fuze was made in 1936 in aluminum,  it was found that the delay was too long for land  targets , so was remarked (28) and used against shipping.

( 5  )   Pattern 2    As above but made of brass.

( 15 )     Simple elecrical impact fuze that could be discharged using the Crabtree discharger, this device depressed the charging pins  and shorted the capicitors out , this device became obsolete when the (25)  series fuze came into use, this fuze could be used in any bomb 50 Kg upwards.

( 25 )      Produced in 9 variations,mainly internal component changes, but the more common types listed below

( 25 )A      As above

( 25 )A*    As above

( 25 )B      As above

( 25 )C      As above

( 25 )D     As above But without the selector switch, which is blanked off.

( 25 )D     As above but uses a rolled steel case ,  similar to the (55) fuzes

( 35 )        Used in the Pc500 and PC1400 bombs

( 45 )       Not used in the Uk but could be used in any bomb 50Kg up.

( 45 ) A   As above rolled steel case similar to the (55) fuzes

( 55 )        Replaced the ( 25 ) series cheaper to produce used a steel case instead of aluminum , fuze was not very waterproof, and suffered from damp.used in any bomb 50Kg up

( 55 )A    This fuze had two wires to an  impact switch fitted to the Stabo (a nose tube designed to explode the bomb about 2 feet above ground.

( 55 )TP    Used in Concrete bombs, believed to be a tropicalised fuze

                       Series ( 6 ) Special impact fuzes

( 26 )       Used on the Flam  (Oil) bombs  

( 46 )        Electrically armed  Mechanical impact tail fuze used on the KC 50  gas bombs

( 56 )         Very little known about this fuze.

( 66 )         A very unusual fuze that when entering the airstream a  6 vane Impeller would rotate and create a voltage, when the bomb landed the voltage created would short out and explode the bomb , only fitted to the SD10 bombs .its designer was Hubert Ruhlemann ,

( 66 )A       As above but has 8 vanes on Impeller as against 6,  also stamped in centre with letter A (See Bomb Fuzes a Laymans Guide)

                      Series ( 7 ) Long delay fuzes

( 17 )       Clockwork long delay fuze anything up to 72 hours delay , the fuze had the clock screwed externally and could be distiguished by the fact that it had 2 charging pins, could be used in any bomb 50 Kg up but usually the 250 kg and above .

( 17 ) A    Pattern 1   Had one charging pin and the clock was fitted inside, a aluminum sleeve , Could be used in any bomb 50Kg upwards

( 17 ) A       Pattern 2   Also known as the Emergency Pattern lower case made in steel, the appearance of this looks as though the metal is rusty and pitted, to see a picture of this fuze see (Bomb Fuzes a laymans guide)

( 17 ) A       Pattern 3    Known as the 1941 pattern the clock is contained in a plastic sleeve 

( 17  ) B     Similar to above , but the  clock time was from 5 to 120 mins

( 17 )  Bm   Clockwork fuze could be set for between  5 to 32 mins used in  the V1 flying bombs

( 57 )        A chemical long delay fuze incorperating anti withdrawl device , not found in any UK bombs.

( 67 )       Used in the SD2 butterfly bombs

(67) V     Used in the A.B. 70 Container

                      Series ( 8 ) Electrical impact with delay fuzes

( 28 )        These were produced for sea targets , and hardened fortifications, they would penetrate the deck or roof , before exploding, used in 250 Kg and above bombs.

( 28 )*    As Above

( 28 )A    As above delay difference

( 28 )B    As above

( 28 )B    As above

( 28 )B6   As above

( 28 )  B07  As above

( 38 )    Similar to above used for sea targets usually found in SC250 Kg bombs

( 38 )SL  Used as an anti submarine bomb fuze

                      Series ( 9 ) Aerial burst fuzes

( 9 )     Pattern 1  Airburst fuze has a  test pin, used on parachute flares.those produced in 1938 were constructed the same as the (15) fuze , those dated 1939 used the (25) type construction having 3 screws in the shoulder.

,( 9 )     Pattern 2   As above but has a screw covering test pin

( 29 )           Mechanical airburst fuze used in LC10 parachute flares

( 59 )           A short bodied fuze for AB 250/500 containers

( 59 )A        As above

( 59 )B        As above had a time setting screw 41 or 58 second delay.

( 69 )C11    Electric aerial burst fuze used in AB250, 500,1000 containers

( 69 )B       Delay element part of above fuze  bombs 1.3 to 3.5 sec delay

( 69 )C      As above but 0.3 to 1.0 sec delay

( 69 )D     As above 0.7 to 1.2 sec delay

( 69 )E      As above 4.0 to 5.5 sec delay

( 79 )        Airburst fuze used in Photoflash bombs and Parachute flares Delay from 5 to 25 seconds

( 79 ).      As above but  delay between 3 and 30 seconds

( 79 )A    Again as above but timing 3 to 10 seconds

( 89 )       Clockwork airburst fuzes used in photoflash bombs maximum delay being 80 seconds this fuze is easily recognised by its smaller size.
( 89 )A     Could be set between 1 and 80 seconds

( 89 )B    This fuze is the normal length , has one charging plate on the top and could be set from 1 to 80 seconds

( 89 )C     As above , but was settable from 2 to 160 seconds.

( 89 )D    As above , but clock ran for 85 seconds

 I mentioned that there were 3 fuzes used in the V1 flying bomb , but i have only mentioned 2.

The third one the ENT106 was not really a fuze it was a a steel tube , containing resistor,s and capicitors ,( very similar in  appearance of a car ignition coil) , connected directly to the battery of the bomb, this in turn was connected to a nose switch and to the second Fuze component the 106* via two leads, which contained the gaine.  

This is a selection of  fuzes that the Germans  used and the bombs that they could be used in .

Often there are minor variations to the head markings , for instance on the (55) fuze the numbers made be on some fuzes smaller , also date codes, and batch markings , may be omitted. there maybe dots present before the El these generally do not mean anything , also the Germans did colour code their fuzes some of which are listed below.

Fuze painted Red are Airburst Fuzes (9) series

Fuze painted Green are Special handling fuzes (50) anti disturbance

Fuze painted Yellow are short delay fuzes the (28) series

The grey , paint used on general fuzes were not a uniform  dark grey 

 but could be various shades of grey , also a lot of fuzes were unpainted .

I am always interested in comments and suggestions on improving this guide if you would like to contact me at bombfuzecollectorsnet. im always happy to hear how i can improve this guide or to discuss any fuze related issues.


Recently a number of items have come up for sale marked 719 BD coy this was a General construction company converted to Bomb disposal in September 1940.and were attached to 5 BD Company that operated from Acton and covered North of the Thames as far as Harrow and Borehamwood. There were 7 general companies converted they were 718 , 719 ,720 ,724 ,725 ,726 ,and 727 Also 4 quarrying companies were converted they were 125 , 851 , 853 , and 854 . I hope that this updated information will be useful.



Steve Venus


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