I said probably, the N6 needs checking, it could be a 90 series fuze. With a Mk 1 in the designation at this date (Army was using L series notation by this time) it is certainly Naval and the SR is an inspector's mark at Springfield Road (long since closed).
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Not sure on this cutaway fuze
- Thread starter havoc
- Start date
havoc
Well-Known Member
Bonnex, appolagies for jumping the gun lol. Series 90 was the number i could not remember, that was the original fuze i sold a fair while back. If i remember correctly that one had the letters BN as well ???? My memory really isnt that great at present.
But looking more closely, it has three dimples on the other side of the section.Could poss be the Number 3.
Andy, cheers for your post as well mate,
Regards,
Clive.:tinysmile_hmm_t:
havoc
Well-Known Member
VT is generally referred to as "variable time" and the fuze shown appears to be a radio frequency proximity fuze (the coil in the nose).
havoc
Well-Known Member
Chris 42 RQ
Well-Known Member
Your fuze looks similar to an L27 proximity fuze but may be something else. Info from my basic course in 1979 re what proximity fuzes were used in UK land service and the ammo/equipments they were used with is as follows:
L14 - Shell 25 Pr HE
L21 - Shell 25 Pr HE
L23 - Shell 5.5 in HE
L27 - Shell 105 mm FD HE Mk 2 System
L36 - Rd 105 mm HOW HE & Shell 105 mm FD HE Mk 1 System
L62 - Rd 105 mm HOW HE & Shell 105 mm FD HE Mk 1 System
L66 - Rd 105 mm HOW HE & Shell 105 mm FD HE Mk 1 System
L78 - Projectiles 155 mm HOW HE long intrusion & 175 mm HE M437A2
M513 - Rd 105 mm HOW HE
M514 - Projectiles 155 mm HOW SP M109 & 8 in HOW M2
Proximity fuzes of the same model could operate on different frequencies. Frequencies were denoted by fuzes having different suffixes and colour codes eg L14A1C coloured blue, where `C’ and blue denoted the fuze frequency. Confusingly the suffix and colour combinations were not standard. Please keep this in mind if you think you have an `experimental’ fuze.
VT (variable time) proximity fuzes were the first type to be introduced, by the USA. Radio waves were transmitted by the fuze and reflected off a target back to the fuze. The transmitted and received radio wave interactions, known as the `ripple beat’ caused the fuze to function when they reached a predetermined intensity ie at a set distance from target. Self destruct and percussion elements may be fitted. VT fuzes were susceptible to electronic countermeasures (jamming) and could also function when in close proximity to an object other than the intended target.
CVT (controlled variable time) proximity fuzes were similar to VT fuzes but incorporated a clockwork mechanism to arm the fuze after a set period of time, and begin the transmission and receipt of radio waves. The clockwork mechanism was therefore a delay to arming and reduced a fuze’s susceptibility to jamming and early burst when passing over raised ground etc.
I hope this helps.
L14 - Shell 25 Pr HE
L21 - Shell 25 Pr HE
L23 - Shell 5.5 in HE
L27 - Shell 105 mm FD HE Mk 2 System
L36 - Rd 105 mm HOW HE & Shell 105 mm FD HE Mk 1 System
L62 - Rd 105 mm HOW HE & Shell 105 mm FD HE Mk 1 System
L66 - Rd 105 mm HOW HE & Shell 105 mm FD HE Mk 1 System
L78 - Projectiles 155 mm HOW HE long intrusion & 175 mm HE M437A2
M513 - Rd 105 mm HOW HE
M514 - Projectiles 155 mm HOW SP M109 & 8 in HOW M2
Proximity fuzes of the same model could operate on different frequencies. Frequencies were denoted by fuzes having different suffixes and colour codes eg L14A1C coloured blue, where `C’ and blue denoted the fuze frequency. Confusingly the suffix and colour combinations were not standard. Please keep this in mind if you think you have an `experimental’ fuze.
VT (variable time) proximity fuzes were the first type to be introduced, by the USA. Radio waves were transmitted by the fuze and reflected off a target back to the fuze. The transmitted and received radio wave interactions, known as the `ripple beat’ caused the fuze to function when they reached a predetermined intensity ie at a set distance from target. Self destruct and percussion elements may be fitted. VT fuzes were susceptible to electronic countermeasures (jamming) and could also function when in close proximity to an object other than the intended target.
CVT (controlled variable time) proximity fuzes were similar to VT fuzes but incorporated a clockwork mechanism to arm the fuze after a set period of time, and begin the transmission and receipt of radio waves. The clockwork mechanism was therefore a delay to arming and reduced a fuze’s susceptibility to jamming and early burst when passing over raised ground etc.
I hope this helps.
The clockwork part could mean it is a CVT fuze then. Seeing that yours ends in `...6 Mk 1' I would guess it may be for shell of another service, possibly navy, or is a pre `L' series model number. But as I say, it is similar to an L27, perhaps a naval equivalent of the same era (assuming it's British), I'm guessing 1950s - 1970s. The series of plates in the middle are actually a lead acid battery, energised with acid when the shell is fired. A neat idea to ensure the power was available when needed and no problems with battery shelf life. Thanks for showing it Clive. XT
havoc
Well-Known Member
Good morning all,
Many thanks Ammotechxt and Bonnex. It has been a very interesting journey with this one. As my knowledge,limited that is only stays around German WW2 items, this has been extremly interesting.
The fuze itself, nothing like what i am used to dealing with, how intrecate inside and i know have a little more understanding on how it functioned. You guys have broadened my knowledge and made an item more interesting than what i originally thought. It will make a nice item to those who collect this era.
Thanks ever so much again all, Its been great.
Very best regards,
Clive.
Many thanks Ammotechxt and Bonnex. It has been a very interesting journey with this one. As my knowledge,limited that is only stays around German WW2 items, this has been extremly interesting.
The fuze itself, nothing like what i am used to dealing with, how intrecate inside and i know have a little more understanding on how it functioned. You guys have broadened my knowledge and made an item more interesting than what i originally thought. It will make a nice item to those who collect this era.
Thanks ever so much again all, Its been great.
Very best regards,
Clive.
I think they were known as CVT (Controlled Varible Time), and yes, a proximity fuze. Transmitted a signal to the target which bounced back and function at a pre determined hight above the ground. It was also called a Long Intrusion Fuze. One had to remove an explosive "booster" from the projectile before fitting this type of fuze. Now they are all standard size as you know. I could be wrong but that is my pick.
J
John D. Bartleson Jr.
Guest
VT Proximity Fuzes;
the VT fuze is an A/A and sendsout an active radio signal and when the echo back to the receiver part of the fuze is of desired time (distance) then it detonates the fuze. Normally fitted with a self destroying feature to protect neignboring ships after a miss.
Initially is was classified secret for obvious reasons.
regards,
John
Oops, sorry I missed Ammotech's posting.
the VT fuze is an A/A and sendsout an active radio signal and when the echo back to the receiver part of the fuze is of desired time (distance) then it detonates the fuze. Normally fitted with a self destroying feature to protect neignboring ships after a miss.
Initially is was classified secret for obvious reasons.
regards,
John
Oops, sorry I missed Ammotech's posting.
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