1、MIL-R-255b5E 16 m 77777Ob 0173b25 O m MIL-R-2 5 565E 13 August 1974 SUPERSEDIXG 9 June 1970 - MIL-R-25 56 5D MILITARY SPECIFICATION RELEASES, PARACHUTE RIPCORD, AUTOMATIC, TYPES F-1B ARD FF-1 This specification is approved for use by all Depart- ments and Agencies of the Denartment of Defense. 1. SC
2、OPE 1.1 Scope. This specification covers two types of automatic, parachute- ripcord releases, designated mes F-1B and FF-1. 1.2 Classification. The automatic, parachute-rimord release shall be one of the following classes, as specified (see 6.2): Class 1 - see Figure 1 Class 2 - see Figure 1 Class 3
3、 - see Figure 1 Class 4 - see Figure 2 Class 5 - see Figure 3 2. APPLICABLE DOCU*IENTS * 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS Federal QQ -14-290 PPP-B
4、-636 PPP-B-676 PPP-B-601 Military NIL-P- MIL-S-5059 MIL-E-5272 141-862 5 Platine; Nickel (Plectrodeposited) Boxes, Wood. Cleated-Plywood Boxes, Shipaing, Fiberboard Boxes, Setup Preservation: I.!ethods Of Steel, Corrosion- Yesistant (1.6-8). Plate, Sheet And Strip Environnental Testing, Aeronautical
5、 And kisociated EquiFment . General Specification For Wire ope-: Steel (Corrosion-Pesisting), Flexible, Prefornied (For Aeronautical Use ) Anodic Coatings. For Muminun And Aluminum Alloys Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- .- MIL-R-2536
6、5E 16 9999906 0373626 2 m STANDARDS Federal FED-ED-595 Kilitary MIL-STD-100 MIL- STD-1 O 5 MIL-STD-129 MIL- STD-130 MIL-S.TD-143 MIL- STD-2 02 MIL-STD-831 HL-STD-889 MIL-STU-1186 MS20664 Air Force-Navy Aeronautical 936 AX3054 DRAWI-NGS Air Force 55C6448 576109 59B6223 6 2A4 26 1 62C4268 661521 Color
7、s Engineering Drawing Practices Sampling Procedures And Tables For Inspection By Attributes Marking For Shipment And Storage Identification Marking Of U.S. Military Pro? ert y Standards And Snecifications , Order Of Precedence For The Selection Of Test Methods For- Electronic And Electrical Componen
8、t Farts Test Reports, Preparation Of Di ssimi lar Net als Cushioning, Anchoring, Bracing, Blocking, And Waterproofing; With Appropriate Test Vethods Ball End, Wire Rope, Swaginc, Single Shank Screw, Machine -.Pan Head, Structural, Cross Recessed Housing, Parachute Ripcord Washer, Tooth Lock But, Cou
9、pling, Electrical Conduit Lanyard - Automatic Parachute Ripcord Release, Installation Of Lanyard - Automatic Parachute Ripcord Release. Installation Of Sna? Eook - Parachute Lanyard, Assembly Of Anchor - Parachute Ripcord Eelease Aut orat i c Lanyard - Automatic Parachute Ripcord Release, Assembly O
10、f Guide-Parachute Ripcord Grir 2 I .“ . -1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-R-25565E 36 777770b 0373627 Li W MILR-25565E U. S. Gauge Co. AF-1104 AF-.1105 AF-1188 AF-1211 AF-1218 AF-1219 AF-1221 AF-1226 AF-1231 AH-1834-AD Anaconda
11、Metal Hose Division 79790 Holder-Arming Pin Washer-Arming Pin Screw-Power Cable Cuide Washer-Power Cable Guide Pin Arming Arming Knob Assembly Ferrule-Arming Knob Arming Cable Housing Assy -.Pin Housing Assy Ring Retaining Housing-Ripcord Power Cable (Copies of specifications , standards , drawings
12、, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 Qualification. Releases furnished under this specification shall be products which are qualified f
13、or listing on the applicable qualified products list at the time set for opening of bids (see 4.3 and 6.3). 3.2 Camponents. The release shall consist of the following major components: Item No. .- It em guantitx - 1 Power source 1 Timer mechanism 1 Aneroid mechanism 1 Ripcord power cable assembly 1
14、Arming assembly 1 Cover 3.3 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with SIIL-STD-143. 3.4 i%terials. 3.4.1 Fungus-proof materials. Naterials that are nutrients for fungi shall
15、 not be used where it is practical to avoid them, Where used and not hermet- ically sealed? they shall be treated with a fungicidal agent acceptable to the procuring activity. enclosure, fungicidal treatment will not be necessary. 3.4.2 lrietals. Metals shall be of the corrosion-resistant type or su
16、itably treated to resist corrosion due to fuels, salt spray, or atmospheric condi- tions likely to be met in storage or normal service. Eowever if they will be used in a hermetically sealed 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILR-25565
17、E * 3.4.2.1 Dissimilar metals-. Unless suitably protected against electrlytic corrosion, dissimilar metals shall not be used in intimate contact with each other. Dissimilar netals are defined in MIL-STD-889. 3.5 Design and construction. The release shall be designed to pull the ripcord of a parachut
18、e after a time delay. The time delay shall be pre- settable as described in 3.8. The design shall include a pressure sensitive device which prevents the release from operating above a preset altitude (see 3.9). 3. the case assembly. case configurations. With the cover removed, the case shall exclude
19、 dust and particles caaable of jamming the mechanism. The release .shall be constructed as shown in Figures 1, 2 and The mechanism shal-1 be a complete unit, self-contained and separate from The mechanism shall be compatible with the various The case shall be constructed to protect the mechanism. 3.
20、5.1 Adjustment and rep after use, it can be The cocking procedure shall be as simple as One winding keg shall The windin device FressUre altitude dial settin above which tiiiier Tolerances in feet (feet ) is blocked -54OC pq- +7loC points. The puqose of this is to cause tne ripcord to be pulled at a
21、Dyroxi- mately the preset altitude, taking into consifleration the fact that the man is still free-falling and thus losing altitude during the operation of the timer mechanisri prior to tri1)pirig the release. The altitude-setting scale shall be as long as possible, but shall be no less than 1.46 in
22、ches, or an arc of 135 degrees include ancle with u radius of 5/8 inch. ?1,000 ?1,000 1,000 ii,ooo 500 +1,000 il, O00 2750 28uo il .o00 ?l,OOO +goo 5,000 10 , O00 14,000 20,000 6,500 11,500 21 , 500 15,500 . b. For me PF-1 the altitude setting dial shall be marked in increments of five hundred (500)
23、 feet between 3,000 and 15,000 feet, with the 3,000, 5,000, 10,000 and 15,000 foot points being identified with a numeral as well as a graduation. Intermediate graduations to be 4, 6, 7, 8, 9, 11, 12, 13 and 14 thousand feet and minor graduations at five huncired (500) foot increnents. setting (3,00
24、0 feet) to insure that the altitudit dial indicator cannot be inadvertently set belov the intended minirmn setting. It shall be feasible to rhange the setting with a gloved hand. As a safety nieasure, it shall be possible to insert the arming pin regardless of the setting of the altitude dial indica
25、tor. h5th the arciinp pin inserted, the pre;:cure sensing device cm contact arn shall be sufficient distance fron ths Fressure sensing device caz. to prevent actual contact during the application of vibration I acceleration and shock force. The ptssure sensin, device shall be calibrated to release t
26、ne timer escapement at the pressure altitudes Ested in the Table II for the various altitude settins -oints, and maintain linsar accurac:.r at the intermeiate and minor graduations to tie icsxi:-.uir feasiyle. It shall be possible to arm tne release 7O feet above Fressure altitude at which the tir!e
27、r is blocke as determinea. in 4.5.4.2 without the release activating. of the aia1 shall tie 183 degrees plus or minus sufficient tolerance for accurate calibration to the pressur? s?nsixE evice crxdua%ions cite6 above. The pressure serisicc Urvic-. Cuiae pin shall be installei? ir. a manfiei that wi
28、ll insure stable aneroid cositiori and positive retent-ion of tiie .ouide vin. A positive block shall ba provided at the minimum aneroi altitude Tnne saan _I_. 5AULL II. Fressure Sltitudes for P r!lied uniformly. tensile-strength requirement applies to the end ferrules only, The ca3le housing shall
29、be furnished by lhe length shall be as This 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I. MIL-R-25565E 36 m 7777706 0373635 3 m VIL-I?-2 5 56 5E ANNULAR FERRULE CLIP 1 INNER STEM PROJECTION (ORANGE OR RED - SEE 3.10.2) DIMENSIONS IN INCHES UN
30、LESS OTHERWISE SPECIFIED FIGURE 4. APPROXIMATE OUTLINE- ARMING KNOB WITHOUT RETRACTABLE LANYARD 11 -_ - - . - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-255b5E Ib M 999770b 0193636 5 MIGR-25565E * 3.10.4 Knob guide. The knob guide shall co
31、nform to Drawing 66C1521, except The guide shall be supplied with The screws shall be secured with lockwashel that for the myrelease A knob guide conforming to the configuration illustrated in Figure 5 shall be provided. two fillister head screws of a length sufficient to firmly retain the cable hou
32、sing as specified in 3.10.3. concealed in the counterbored holes in the knob the class shall be desiwated by the procuring activity (see 6.2). The contractor shall furnish the l/b-inch inside diameter, flexible, stainless steel conforming to NIL-S-5509 (American Iron and Steel Institute?s type 302)
33、, tubing, commercially designated as unpacked , interlocked construction. strip stock. Figures 1, 2 and 3. equal, of a 0.020 inch minimum thickness. the tubing. 0.375 inch and a clear inside diameter of not less than 0.180 inch. finished housing shall withstand a 180 degrees bend over a 3-inch mandr
34、el at -54OC without cracking or visible damage. The finished housinE shall have a minimum tensile strength of 150 pounds with the end ferrules suitably gripned in fixtures so that the load is applied uniformly. secured to the case by an AN3054-4 conduit coupling nut as shown on Figures 1, 2, and 3.
35、The outer end of the vower cable This swaging shall meet the strength requirements of The lengbh of the power cable and power cable housing shall be This tubing shall be fabricated by the spiral winding of formed The tubing shall be internally lined with Teflon, or It shall be terminated in stainles
36、s steel fittings as shown on The lining shall adhere snugly to The finished housing shall have an outside diameter not to exceed The This housine; shall be 3.12 CE?. provided and shall be retained by one centrally located holddovn screw. protective shield suitably attached to the cover shall house t
37、he holddown screw and form a cover assembly. in thickness. minimum applied in a perpendicular direction to any portion of the too of the cover without affecting the operatinc performance of the release. screw shall be free to rotate in the cover assenbly but shall be so desiEned that in normal usage
38、 it will renain with the cover at all times. screw shall also be so designed that upon disengagement from the center stud, it shall be mechanically retained in a fully retracted position until re-engaged with the center stud. !Cile holddown screw and cover assenbly shall be designed to permit the us
39、e of a 10-cent piece to encage or disenpage the holddown screw. design and shall be sealed dusttight with a readily removable can. located in a retaining groove shall seal the joints at the holddom screw and case. me cover assembly shall be so designed that it cannot be asseEbled to the case when th
40、e timing knob is not fully seated. be of such rigid construction as to prevent forcing or warping and thereby giving a false indication of prooer assembly. A one-piece cover enclosing the entire ton of the case shall be A The grotective shield shall be 13/32 21/16 inch The cover assezbly shall withs
41、tand a crush load of 800 mounds The holddown The holddokn An access hole to the holddown screw shall be en:rloyed in the A gasket The cover assembly shall * 3.12.1 The pressure sensing device mechanism shall be protected by a separate protective shield so that dust will be retarded and particles can
42、able of jam- dng the mechanism will be isolated from the instructknc. An instruction plate, permanently and legibly marked with the following information, shall be securely attached to one long side of the case and may be combined with the nameplate, if desired: WINDING INSTRUCTIONS INSERT ARMING PI
43、N - LIFT TIhER KNOB AIID SET AT 1 SECOND WIND FULLY WITH FORCE (INTERNAL STOP PREVENTS OVERWINDING) LIFT TIhER KNOB BEFORE AND WILE EXTENDING POWER CABLE SET TIhE 3.19.3 A decal shall the location shown on printed on the decal: DO NOT FORCE COVER TIMER KNOB MUST BE SEATED be affixed to the cover of
44、all classes of releases in Figures 1, 2 and 3. The following instruction shall be 3.20 Finishes and protective coatLnE. treated shall be electroaolished or passivated if made from stainless steel, electroplated in accordance with QQ-N-290 if made from brass or bronze, or anodized in accordance with
45、MIL-A-8625 if made from aluminum alloys. All moving parts which can be so 3.20.1 The outer case and cover of the FF-1 release shall be yellow, Shade 13655 of FTD-STD-595. 3.21 Identification of product. Equioment, assemblies, and parts shall be marked for identification in accordance with !IL-STD-13
46、0. 3.22 Workmanshk. The release, including all parts and accessories, shall be constructed and finished in a thoroughly workmanlike manner. Particular attention shall be given to freedom of parts from burrs and sham edges. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for plan B. 500 or fractio
47、n thereof produced and subjected to the following tests as described under 4.5: Five releases shall be selected at random from every a. b. High temperature exposure (see 4.5 .lo). High altitude - low temperature exposure (see 4.5.11). c. Vibration. d. Shock. 4.4.2.2.1 Rejection and retest. fails to
48、meet the specification, no item still on hand or later produced shall be accepted until the extent and cause of failure have been determined and appropriately corrected. “he contractor shall explain to the Government representative the cause of failure and the action taken to preclude recur- rence.
49、After correction, all of the tests shall be repeated. 4.4.2.2.2 Individual tests EaLcogtLnge. For ooerational reasons, individual tests or other sampling plans may be continued pendinc the investipation of a sampling test failure. Final acceptance of the itens on hand, or nroduced later, shall not be Eade until it is determined that all item meet all the requirements of the specification. 4.4.2.3 failure could indicate that defects may exist in items
