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Wing-To-Body Aircraft Fairing with Spray-On Foam Flügel-Rumpf-Flugzeugverkleidung Mit Aufsprühbarem Schaum Carénage Aile/Fuselage D’Avion Avec Mousse Pulvérisable

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Wing-To-Body Aircraft Fairing with Spray-On Foam Flügel-Rumpf-Flugzeugverkleidung Mit Aufsprühbarem Schaum Carénage Aile/Fuselage D’Avion Avec Mousse Pulvérisable (19) TZZ __T (11) EP 2 415 664 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.: of the grant of the patent: B64C 1/40 (2006.01) B64C 7/00 (2006.01) 15.01.2014 Bulletin 2014/03 B64C 1/26 (2006.01) (21) Application number: 11176204.3 (22) Date of filing: 01.08.2011 (54) Wing-to-body aircraft fairing with spray-on foam Flügel-Rumpf-Flugzeugverkleidung mit aufsprühbarem Schaum Carénage aile/fuselage d’avion avec mousse pulvérisable (84) Designated Contracting States: • Hoffman, Herbert L. AL AT BE BG CH CY CZ DE DK EE ES FI FR GB Seattle, WA Washington 98105 (US) GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO • Poling, Hugh W. PL PT RO RS SE SI SK SM TR Seattle, WA Washington 98125 (US) (30) Priority: 04.08.2010 US 850036 (74) Representative: Boult Wade Tennant Verulam Gardens (43) Date of publication of application: 70 Gray’s Inn Road 08.02.2012 Bulletin 2012/06 London WC1X 8BT (GB) (73) Proprietor: The Boeing Company (56) References cited: Chicago, IL 60606-2016 (US) EP-A1- 0 435 650 US-A- 5 985 362 US-A1- 2006 145 006 US-A1- 2008 149 767 (72) Inventors: US-A1- 2009 184 200 US-B1- 6 722 611 • Lin, Juhn-Shyue Renton, WA Washington 98055 (US) Note: Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). EP 2 415 664 B1 Printed by Jouve, 75001 PARIS (FR) 1 EP 2 415 664 B1 2 Description foam. FIG. 1A is a cross-sectional view of a portion of a TECHNICAL FIELD fairing panel of the wing to body fairing, with a spray- on foam layer provided on an interior panel surface [0001] The disclosure generally relates to wing to body 5 of the fairing panel. fairings in aircraft. More particularly, the disclosure re- FIG. 2 is a perspective view of a portion of a fairing lates to a wing to body fairing with foam which reduces panel of the wing to body fairing, with a spray-on vibration, fatigue and cabin noise in an aircraft and a foam layer deposited on the fairing panel. method of reducing cabin noise or reducing panel vibra- FIG. 2A is a cross-sectional view of a portion of a tion in an aircraft. 10 fairing panel of the wing to body fairing, with insula- tion pins extending from the interior panel surface BACKGROUND and a spray- on foam layer provided on the insulation pins and the interior panel surface of the fairing pan- [0002] In modem commercial aircraft, heavy insulation el. blankets may be placed on wing to body fairings to reduce 15 FIG. 3 is a flow diagram of an illustrative embodiment cabin noise to acceptable levels by damping vibration of of a method of reducing cabin noise or reducing pan- the wing to body fairing panels. However, insulation blan- el vibration in an aircraft. kets may contribute excessive weight to the fairings. FIG. 4 is a flow diagram of an aircraft production and Moreover, insulation blankets may not be effective in service methodology. damping vibration of the fairing panels during operation 20 FIG. 5 is a block diagram of an aircraft. of the aircraft. [0003] Therefore, a wing to body fairing with foam DETAILED DESCRIPTION which reduces vibration, fatigue and cabin noise in an aircraft and a method of reducing cabin noise or reducing [0009] The following detailed description is merely ex- panel vibration in an aircraft are needed. 25 emplary in nature and is not intended to limit the de- scribed embodiments or the application and uses of the SUMMARY described embodiments. As used herein, the word "ex- emplary" or "illustrative" means "serving as an example, [0004] The disclosure is generally directed to a fairing instance, or illustration." Any implementation described with spray-on foam, which reduces vibration, fatigue and 30 herein as "exemplary" or "illustrative" is not necessarily cabin noise in an aircraft. An illustrative embodiment of to be construed as preferred or advantageous over other the fairing includes a fairing body having a fairing interior implementations. All of the implementations described and an interior surface and an insulating foam layer pro- below are exemplary implementations provided to ena- vided on the interior surface of the fairing body. ble persons skilled in the art to practice the disclosure [0005] US 2009/0184200 A1 discloses such a fairing 35 and are not intended to limit the scope of the appended with the features of the preamble of claim 1. claims. Furthermore, there is no intention to be bound by [0006] The disclosure is further generally directed to a any expressed or implied theory presented in the pre- method, not claimed, of reducing cabin noise or reducing ceding technical field, background, brief summary or the panel vibration in an aircraft. An illustrative embodiment following detailed description. of the method, not claimed, includes providing a fairing 40 [0010] Referring initially to FIGS. 1-2A, an illustrative having a fairing body with an interior surface, providing embodiment of the wing to body fairing with foam, here- an insulating foam, applying the spray- on insulation foam inafterfairing, isgenerally indicated by reference numeral to the interior surface of the fairing body and installing 1. In some embodiments, the fairing 1 may be a wing to the fairing on an aircraft. body fairing (WTBF) of a commercial aircraft, for example [0007] In some embodiments, not claimed, the method 45 and without limitation. The fairing 1 may include a fairing of reducing cabin noise or reducing panel vibration in an body 1a having a fairing interior 5. In some embodiments, aircraft may include providing a fairing having a fairing the fairing body 1a may have multiple fairing panels 2 body including a plurality of fairing panels with an interior which are assembled into the fairing body 1a according surface; providing a spray-on insulation foam; spraying to the knowledge of those skilled in the art. Each fairing the spray-on insulation foam on the interior surface of 50 panel 2 may have an exterior panel surface 3 which gen- the fairing body; and installing the fairing on an aircraft. erally faces away from the fairing interior 5 of the fairing body 1a and an interior panel surface 4 which generally BRIEF DESCRIPTION OF THE DRAWINGS faces the fairing interior 5 of the fairing body 1a. The fairing body 1a may have a fairing edge 6. [0008] 55 [0011] Referring to figure 1A, at least one insulation foam layer 8 may be sprayed on the interior panel sur- FIG. 1 is a bottom perspective view of an illustrative faces 4 of the fairing panels 2 of the fairing body 1a. In embodiment of a wing to body fairing with spray- on some embodiments, the insulation foam layer 8 may be 2 3 EP 2 415 664 B1 4 closed cell polyurethane spray- on insulation foam which the art. During operation of the aircraft, the insulation is sprayed onto the interior panel surfaces 4 of the fairing foam layer 8 may reduce wing-to-body fairing vibration, panels 2. A polyurethane foam which is suitable for the fatigue and cabin noise by dissipating energy via a damp- spray-oninsulation foamlayer 8is TIGER FOAM@ which ing and mass effect. can be obtained from Commercial Thermal Solutions, 5 [0015] Referring next to FIG. 3, a flow diagram 300 of Inc. of Spring Lake, NJ (www.tigerfoam.com). In some an illustrative embodiment of a method of reducing cabin embodiments, the insulation foam layer 8 may be applied noise or reducing panel vibration in an aircraft is shown. to the interior panel surfaces 4 of the fairing panels 2 In block 302, a foam may be provided. In some embod- usingan alternativeapplication method. Forexample and iments, the foam may be a closed cell polyurethane without limitation, the insulation foam layer 8 may be a 10 spray-on insulation foam, for example and without limi- prepared foam layer which is applied to the interior panel tation. A polyurethane foam which is suitable for the surfaces 4 using adhesive and pressure. The insulation spray-on foam layer is TIGER FOAM@ which can be foam layer 8 may be contiguously applied to the interior obtained from Commercial Thermal Solutions, Inc. of panel surfaces 4 of the fairing panels 2. Therefore, the Spring Lake, NJ (www.tigerfoam.com). In some embod- insulation foam layer 8 may be continuous generally15 iments, the foam may be a prepared foam layer. In block throughout the entire surface area which is represented 304, a wing to body fairing having wing to body fairing by the interior panel surfaces 4 of the fairing panels 2. panels may be provided. In block 306, the foam may be [0012] As shown in FIG. 1A, in some embodiments the applied to the interior surfaces of the wing to body panels insulation foam layer 8 may have a core foam portion 9. of the fairing by spraying or by application using adhesive A tapered foam portion 10 may extend outwardly from 20 and pressure to form an insulation foam layer on the in- the edges of the core foam portion 9 toward the fairing terior surfaces of the wing to body panels.
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