(Appendix – A)
GENERAL TECHNICAL SPECIFICATION FOR MECHANICAL POINT DETONATION FUZE (FILLED)
REQUIRED FOR SHELL 130 MM HE (EX-RUSSIAN)
TO BE FIRED WITH GUN 130 MM RIFLE BORE Fd M-46.
1.
General Description: The Fuze is a mechanical nose fuze to be used in 130mm High Explosive
Shell. It is a combined percussion direct action (DA) and graze action type, with delay safety
mechanism. In this fuze “safety lock mechanism” device to be provided. The fuze is to be safe in
storage, handling and operation and ensures the reliable and safe function of the ammunition in all
weather conditions.
2.
Technical Specification:
a)
b)
c)
d)
e)
Length of Fuze
- 105.71 mm
External Dia of Fuze
- 40.0 mm (Max)
(Ref. Appendix- C1)
Wt. of Fuze
- 415 gm to 440 gm (Filled condition)
Thread dimension
- 36.18 X 10 TPI
External dimension of Fuze is enclosed drawing No. OFCh-2015/I
This fuze is to be assembled in Adapter which in turn fitted to the Shell. The profile drawing
of Adapter assembled with CE Pellet is enclosed for ready reference as per Drawing No. OFCh2015/ II, OFCh-2015/III, OFCh-2015/IV.
3.
Operational Readiness: The fuze should not require preparation for firing after removing it from
its container (except delay mode setting).
4.
Safety: The fuze should be safe for storage, handling and transportation as per MIL-STD-1316E or
STANAG 4187. It should have bore, muzzle and flight safety. Vendor should mention in details the
mechanism provided in the fuze for meeting storage, handling and operation safety.
Reliability: It must have functional reliability of at least 95% for both direct impact & delay mode.
5.
Packing:
a) Suitable packing arrangements should be provided for transportation and storage without causing
any damage to fuze.
b) The fuzes should be packed in hermetically sealed condition.
c) The package marking should be legible giving details of fuze, lot No., Year of mfg, Qty.,
Compatibility Group & UN Hazard Division. Labels and lot details to be mentioned on packages.
d) Marking of fuze: Fuze should be marked with luminous paint for ease of recognition at night
under field conditions.
6.
Shelf Life: The residual shelf life of the fuze should not be less than 07 years in Indian conditions &
the supplies should be of latest manufacture. The Vendor will provide technical details for storage
and transportation. Vendor will provide Specifications with regards to explosive filling with test
procedures to evaluate shelf life. Technical literature substantiating the claim that fuze and its
explosive filling would give stipulated shelf life should be made available.
7.
Proof and Sentencing Criteria: The fuzes will be checked for Check Proof and Chemical analysis
to assess the serviceability.
Type of Fuze proof : Filled Proof
Size of Lot
: Multiple of 10,000 nos.+ quantity required for Filled Proof & PDI tests
Proof Conditions :
(i) Static Tests: To be finalised and carried out by OEM at their premises during manufacturing
stages and at the time of PDI.
(ii) Chemical Testing: Qty. 1 sample per lot to be subjected to chemical analysis of explosive
components at CQA(ME), Khadki, Pune.
Contd..Page 2/..
:: 2 ::
(iii) Dynamic firing : Table - 1
No.
of
Rds
Proof
condition
(a) Absence
of premature
(b) Arming
proof
Shell
Charge
08
Shell 130 mm
Inert Filled with
TNT/AL Pellet
130 mm Full ch
+ increment to
realise pressure
419 to 425 Mpa
08
Shell 130 mm
Inert Filled with
TNT/AL Pellet
130 mm RVC,
Ch-4
Target
25 mm
wooden
target to
be kept at
100 to
150m.
25 mm
wooden
target to
be kept at
100 to
150m.
Fuze Setting
Performance
required.
Instantaneous
There must not be
(i) Premature
(ii) Blind
(iii) Low order
detonation
Instantaneous
There must not be
(i) Premature
(ii) Blind
(iii) Low order
detonation
There must not be
(i) Premature
25 mm
(ii) Blind
(c) Percn
wooden
Shell 130 mm
(iii) Low order
Proof-Set
130 mm RVC,
target to
08
Inert Filled with
Delay Cap off detonation
Delay
Ch-3
be kept at
TNT/AL Pellet
(iv) Failure in
100 to
Delay distance
150m.
(which is 15 to 60m
behind the target)
Special Note: Trials are underway at Proof establishments for introduction of following proof methodologies
1. Introduction of Magnesium pellet in place of TNT/AL Pellet.
2. Use of Mild Steel plate instead of Wooden target board
(iv) Observation Required :
(a) For Proof Condition (a) & (b)
(i) Correct functioning of Rd
(ii) Complete Detonation / Low Order Detonation
(iii) Blind
(iv) Defect in barrel such as Land stripping, scoring, flattened lands and MB damaged.
(v) Any other Defects.
(b) For Proof Conditions (c)
(i) Chamber Elongation of the barrel
(ii) Correct functioning of Rd
(iii) Complete Detonation / Low Order Detonation
(iv) Blind
(v) Defect in barrel such as Land stripping, scoring, flattened lands and MB damaged.
(vi) Delay Distance
(vii) Any other Defects.
(v) Classification of Defects :
For Proof condition (a) and (b)
(i) Critical Defects :- Premature
(ii) Major Defects :- Blind, Low Order Detonation
For Proof Condition (c)
(i) Critical Defects :- Premature
(ii) Major Defects :- Blind, Low Order Detonation, failure in Delay Distance
Contd..Page 3/..
:: 3 ::
(vi) Acceptance Criteria:
For Critical Defects (Premature)
Proof
Level
Sample
Size
Each lot
08
Cumulative
Sample
size
08
Acceptance Criteria
Acc
Rej
0
1
AQL
--
For Major Defects (Blind & Low Order Detonation)
Proof
Level
Sample
Size
First proof
Reproof
08
08
Cumulative
Sample
size
08
16
Acceptance Criteria
Acc
Rej
0
1
2
2
AQL
4%
For Major Defects (Failure in Delay Distance)
Proof
Level
First proof
Reproof
Sample
Size
08
08
Cumulative
Sample
size
08
16
Acceptance Criteria
Acc
Rej
1
4
4
5
AQL
10%
8. Technical Literature
Vendor to provide User Handbook / operator manual, Technical manual, drawings, specifications,
manufacturing process schedule, gauge schedule, manufacturing tool drawings, Jig drawings,
,fixture drawings and assly/ disassembly and safety instruction for manufacturing this fuze in
India. All literature should be in English. In addition to hard copy, a soft copy i.e. CD containing
all above information should also be provided.
a) UNHD & Compatibility Group of Fuze to be specified and the same should be included by
OEM.
b) Procedure of disposal of blinds and removal of stuck up rounds to be provided.
c) Computer based full animation graphics to explain functioning of fuzes to be provided.
d) Do & Don‟t for usage.
9.
10.
Environmental Conditions :
It must adhere to MIL-STD- 331C 2005 or latest version
a) Minimum Temperature for use
– 25 0C
b) Maximum Temperature for use
+ 50 0C
c) Minimum Temperature for storage
– 50 0C
d) Maximum Temperature for storage
+ 70 0C
e) Minimum Relative Humidity
95 %
f) Avg Relative Humidity
65 %
g) Mean value of year‟s Temperature
32 0C
Special Note
The Filled Fuzes will be from current manufacture or latest vintage. The firm shall provide free Transfer
of Technology (TOT) of the fuzes quoted by firm as per para 8 at the time of supply. The depth of
Technology transfer (not less than 100%) to be indicated and should cover hardware and all explosive
compositions. List of components and chemicals with price & quantities are to be provided (quantities in
Technical offer and price in commercial offer) Offer should include 3 sets of documents in English.
(Appendix - B)
TRIAL METHODOLOGY:
1) User Trial:
The aim of the User trial will be to assess the performance of the ammunition against operational requirements of
the Indian Army. This trial will be conducted by the User as per their actual condition of the firing. (Appendix B2)
The required of Fuzes for shell 130mm HE for trials to be carried out by the User are as under:
(a) Plain / Desert
Qty - 35
(b) HAA
Qty – 25
2) Technical Trial (DGQA Trial):
This trial will be carried out to evaluate the fuze safety, functioning and adoptability with the ammunition /
weapon at designated proof range / laboratories in India. (Appendix- B1)
Vendor representative would be required to give a certificate that the fuze given for User trial and DGQA trial is
acceptable and safe for firing for both the trials. The fuzes produced for above mentioned trials will have to be
despatched to the designated port in India at their own cost. The vendor‟s representative can attend the user trial
and DGQA trial at their own expenses in India with prior intimation in writing minimum 30 days in advance.
(Appendix – B1)
DGQA TRIAL
Reference: DGQA letter No. B/85133/Fuze B429/DGQA/ARM-3 dt. 02 Nov. 2015.
Proof Conditions:
1
Static tests: To be finalized and carried out by OEM at their premises during mfg stages
and at the time of PDI.
2
Chemical testing: Qty 1 sample per lot to be subjected to chemical analysis of explosive
components at CQA (ME).
3
Dynamic Firing:
Proof
condition
(a) Absence
of
premature
4.
No.
of
Rds
08
Shell
Charge
Shell 130 mm
Filled Inert with
smk pellet
130 mm Full ch
+ increment to
realize pressure
419 to 425 Mpa
(b)
Arming
proof
08
Shell 130 mm
Filled Inert with
smk pellet
130 mm RVC,
Ch-4
(c) Percn
Proof-Set
Delay
08
Shell 130 mm
Filled Inert with
smk pellet
130 mm RVC,
Ch-3
Target
25 mm
wooden
target to be
kept at 100
to 150m.
25 mm
wooden
target to be
kept at 100
to 150m.
25 mm
wooden
target to be
kept at 100
to 150m.
Fuze Setting
Instantaneous
Instantaneous
Delay Cap off
Performance
required.
There must not be
(i) Premature
(ii) Blind
(iii) Low order
detonation
There must not be
(i) Premature
(ii) Blind
(iii) Low order
detonation
There must not be
(i) Premature
(ii) Blind
(iii) Low order
detonation
(iv)Failure in
Delay distance
(which is 15 to
60 m behind the
target)
Observation Required:
(a) For Proof Condition (a) & (b)
(i) Correct functioning of Rd
(ii) Complete Detonation / Low Order Detonation
(iii) Blind
(iv) Defect in barrel such as Land stripping, scoring, flattened lands and MB damaged.
(v) Any other Defects.
Contd…Page 2 /-
-
2-
(b) For Proof Conditions (c)
(i) Chamber Elongation of the barrel
(ii) Correct functioning of round
(iii) Complete Detonation / Low Order Detonation
(iv) Blind
(v) Defect in barrel such as Land stripping, scoring, flattened lands and MB damaged.
(vi) Delay Distance
(vii) Any other Defects.
5.
Classification of Defects
For Proof conditions (a) and (b)
(i) Critical Defects: - Premature
(ii) Major Defects: - Blind, Low Order Detonation
For Proof Condition (c)
(i) Critical Defects: - Premature
(ii) Major Defects: - Blind, Low Order Detonation, failure in Delay Distance
6.
Acceptance Criteria:
For Critical Defects
Proof
Level
Sample
Size
Each lot
08
Cumulative
Sample
size
08
Acceptance Criteria
Acc
Rej
0
1
AQL
--
For Major Defects (Blind & Low Order Detonation)
Proof
Level
Sample
Size
First proof
Reproof
08
08
Cumulative
Sample
Size
08
16
Acceptance Criteria
Acc
Rej
0
1
2
2
AQL
4%
For Major Defects (Failure in Delay Distance)
Proof
Level
First proof
Reproof
Sample
Size
08
08
Cumulative
Sample
size
08
16
Acceptance Criteria
Acc
Rej
1
4
4
5
AQL
10%
(Appendix – B2)
USER TRIAL
Reference: IHQ of MOD (Army) MGO Br/DDG Proc, New Delhi letter No. 20082/Elect Fuze/MGO/DDG Proc
dtd. 26/07/2016.
EVALUATION MATRIX FOR FUZE FOR SHELL 130 MM HE AMMUNITION)
Sl.
No.
Parameter
User
Trial
DGQA
Evaluation
Remarks
Part-II : Operational Characteristics
1
2
(a)The Fuze must be capable to be fired with all
in-service shelf of 130 mm & must match the existing
range table.
b) The maximum range of shells (all types) when fuzed
with the fuze should not reduce by more than 4x 50%
zone at that range after catering for nonstandard
metrological conditions, wear of the gun and change
temperature from the range /firing tables maximum
ranges.
√
(a) The new fuze should be capable of being screw
threaded in the current shells easily.
(b) There should not be any gap between shell and fuze
body after assembly.
√
√
√
Fuze Setting Arrangement
3
Fuze Setter/ Fuze setting arrangement should be similar
to in-service fuze. It must have the arrangement for fuze
setting both during day and night to include.
(a) It should be possible to set the fuze to „Safe‟ setting
(b) It should allow for repeated changes in fuze setting
√
√
√
Safety
4
The fuze design must meet the safety requirement
objectives and design guidelines at established by
MIL-STD 1316E or STANAG 4187 (Vendor
certificate).
It should adhere to safety parameters as under :(a) Paradropability: The fuze must be safe during and
after a para drop (Vendor certificate).
(b) Bore and Muzzle safety: The fuze should be safe in
bore and withstand the shock of discharge Fuzes should
not arm at a distance less than 100 m from the Muzzle.
√
√
√
Contd..Page 2/..
:: 2 ::
S. No.
Parameter
Part-III : Handling, Storage & Environmental conditions
5
Marking: Marking on the fuzes must be done with the
aim of identifying the type of fuze and to ensure safety
setting are readable identifiable at night.
6
Packing
(a) The fuzes must be packed in hermetically sealed
containers.
(b) These should be further packed in boxes or
containers for ease of transportation. The
packages marking must give out all relevant
ammunition detail including the UN hazard
Division
7
Shelf Life: Fuzes should be have a shelf life of not less
than 15 years.
ENVIRONMENT CONDITIONS
8
The fuzes must adhere to MIL-STD -331C (2005 /
later version)
PART-IV: SPECIFIC CHARACTERISTICS
PERCUSSION FUZE
9
The fuze should detonate on impact. It should cater for
two settable modes as follows.
(a) Direct Impact
(b) Delay Incorporate a minimum delay of 0.04
Sec.
10
It should have functional reliability of at least 95% for
both direct impact and delay modes (Vendor Certificate)
User
Trial
DGQA
Evaluation
√
√
√
√
√
√
√
√
√
√
Remarks