FR2278661A1 - Cellular foam filling to surround rocket propulsion charge - is polymerised in situ and sticks to the propellant - Google Patents

Cellular foam filling to surround rocket propulsion charge - is polymerised in situ and sticks to the propellant

Info

Publication number
FR2278661A1
FR2278661A1 FR7346827A FR7346827A FR2278661A1 FR 2278661 A1 FR2278661 A1 FR 2278661A1 FR 7346827 A FR7346827 A FR 7346827A FR 7346827 A FR7346827 A FR 7346827A FR 2278661 A1 FR2278661 A1 FR 2278661A1
Authority
FR
France
Prior art keywords
propellant
foam
sticks
situ
elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7346827A
Other languages
French (fr)
Other versions
FR2278661B1 (en
Inventor
Jean Ramond
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Nationale des Poudres et Explosifs
Original Assignee
Societe Nationale des Poudres et Explosifs
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Nationale des Poudres et Explosifs filed Critical Societe Nationale des Poudres et Explosifs
Priority to FR7346827A priority Critical patent/FR2278661A1/en
Publication of FR2278661A1 publication Critical patent/FR2278661A1/en
Application granted granted Critical
Publication of FR2278661B1 publication Critical patent/FR2278661B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/12—Compositions or products which are defined by structure or arrangement of component of product having contiguous layers or zones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
    • F02K9/32—Constructional parts; Details not otherwise provided for
    • F02K9/36—Propellant charge supports

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The combustion chamber of a propulsion system, e.g. rocket, contains one or more elements of the propellant which is coated, at least partially, by a compressible cellular foam which is compatible with and sticks to the surface of the propellant. This foam which fills the space between the propellant elements and the inner wall of the combustion chamber is pref. a rigid polyurethane foam of density >2. In rockets where the propellant is in the form of several elements fixed in a bed-plate the foam filling supports the elements over a 1/4 to 2/3 of their lengths. The filling is installed by injecting a mixture of the liquids which react and polymerise at a temp. less than that at which the propellant begins to deteriorate, at two points equidistant from the axis of the combustion chamber, so that the foam forms 'in situ'. Used in combustion chambers of propellant systems, e.g. rockets, and protects the propellant charge against damage during storage, transportation and initial shock when the rocket is ignited. It is installed at temps. which cause no deterioration of the charge.
FR7346827A 1973-12-28 1973-12-28 Cellular foam filling to surround rocket propulsion charge - is polymerised in situ and sticks to the propellant Granted FR2278661A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7346827A FR2278661A1 (en) 1973-12-28 1973-12-28 Cellular foam filling to surround rocket propulsion charge - is polymerised in situ and sticks to the propellant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7346827A FR2278661A1 (en) 1973-12-28 1973-12-28 Cellular foam filling to surround rocket propulsion charge - is polymerised in situ and sticks to the propellant

Publications (2)

Publication Number Publication Date
FR2278661A1 true FR2278661A1 (en) 1976-02-13
FR2278661B1 FR2278661B1 (en) 1976-11-19

Family

ID=9129891

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7346827A Granted FR2278661A1 (en) 1973-12-28 1973-12-28 Cellular foam filling to surround rocket propulsion charge - is polymerised in situ and sticks to the propellant

Country Status (1)

Country Link
FR (1) FR2278661A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499977A1 (en) * 1981-02-18 1982-08-20 Messerschmitt Boelkow Blohm INSULATING LAYER FOR PROPULSIVE LOADS
WO1985001319A1 (en) * 1983-09-16 1985-03-28 The Secretary Of State For Defence In Her Britanni Rocket with different charges
FR2566461A1 (en) * 1984-06-26 1985-12-27 Messerschmitt Boelkow Blohm METHOD FOR FIXING THE PROPULSIVE FUEL WITH FRONT COMBUSTION OF A SOLID PROPERGOL FUSED PROPELLER
EP0686135A1 (en) * 1993-02-24 1995-12-13 Thiokol Corporation Bore mitigants for solid propellant rocket motors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499977A1 (en) * 1981-02-18 1982-08-20 Messerschmitt Boelkow Blohm INSULATING LAYER FOR PROPULSIVE LOADS
WO1985001319A1 (en) * 1983-09-16 1985-03-28 The Secretary Of State For Defence In Her Britanni Rocket with different charges
EP0142247A1 (en) * 1983-09-16 1985-05-22 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Rocket motor with two different charges
FR2566461A1 (en) * 1984-06-26 1985-12-27 Messerschmitt Boelkow Blohm METHOD FOR FIXING THE PROPULSIVE FUEL WITH FRONT COMBUSTION OF A SOLID PROPERGOL FUSED PROPELLER
EP0686135A1 (en) * 1993-02-24 1995-12-13 Thiokol Corporation Bore mitigants for solid propellant rocket motors
EP0686135A4 (en) * 1993-02-24 1996-03-13 Thiokol Corp Bore mitigants for solid propellant rocket motors

Also Published As

Publication number Publication date
FR2278661B1 (en) 1976-11-19

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ST Notification of lapse