CN2447030Y

CN2447030Y - Model plane

Info

Publication number: CN2447030Y
Application number: CN 00242177
Authority: CN
Inventors: 杨家雄
Original assignee: BENSHENG NEW PRODUCTS RESEARCH INST GUIYANG
Current assignee: BENSHENG NEW PRODUCTS RESEARCH INST GUIYANG
Priority date: 2000-07-13
Filing date: 2000-07-13
Publication date: 2001-09-12
Anticipated expiration: 2010-07-13

Abstract

The utility model relates to a model plane, and a fuselage forms a whole by the connection of two main beams, a left side plate and a right side plate through a plurality of connecting elements; filling cores arranged at the front section of the fuselage and the tail section of the fuselage are foamed plastics, and the tail section of the fuselage is connected with two main beams into the whole. Wings are composed of a front half box-shaped main beam and a back wing rib which are wrapped and pasted by a wing main board, the roots of the wings are inserted in an upper recoil angle sleeve box formed by plastics integrally, and the roots are pasted and fixed with the sleeve box. A horizontal tail, an elevating rudder, a vertical tail and a rudder are hinged and pasted by an upper plate and a lower plate integrally between the upper plate and the lower plate. A landing chassis is fastened and fixed on fuselage main beams and the connecting elements by a nylon fastening band. A control system push-and-pull rod is positioned at the outer side of the fuselage completely, a rocker arm is provided with a drill bolt, the tail of the push-and-pull rod is penetrated in a drill hole drilled by the drill bolt, and the push-and-pull rod is locked with the drill hole by a lock nut.

Description

The model of an airplane

The utility model relates to a kind of model of an airplane, especially adopts the model of an airplane of new material, new construction.

The structure of the existing model of an airplane has two kinds: a kind of is that traditional structure is promptly made framework with timber, and the outside is with coverings such as heat shrinkage film, and not only structure is very complicated, the cost height, and the model impact resistance is poor, and a large amount of valuable timber of will using up.Another kind of structure is with the foamed plastics cutting forming or directly uses the mould foaming and molding, cuts the inside, back lining and goes up the surperficial again covering of gallows timber and form, and structure is complexity equally, and model weight intensity difference bigger than normal.

The purpose of this utility model provides a kind of model of an airplane, this model of an airplane structure is very simple, makes easily, especially is fit to industrialized mass, material therefor is cheap, make the one-tenth instinct of the model of an airplane reduce significantly, and it is in light weight to make the back model of an airplane, intensity is big, shock-resistant, can change easily after a model of an airplane part breaks, very high viability is arranged, so this model of an airplane is very easy to popularize.

The purpose of this utility model is achieved in that the model of an airplane is by fuselage, wing, empennage, control system and undercarriage are formed, fuselage is by girder, baffle plate or coating, connector, leading portion is filled out core, reinforcement, left side plate and fuselage rear are formed, two girders and left side plate connect into an integral body by several connectors, the connector center line is vertical with the fuselage center line, the girder front end has constituted engine mount, last mounted engine and fuel tank etc., reinforcement all is equipped with in the place that is drilled with the hole on the girder, to guarantee the intensity of girder, be filled with core in the inner space of nosing, and leave the space that receiving system is installed, baffle plate or coating are equipped with in the front of filling out core, to prevent that the engine oil material from corroding, the back contacts with the fuselage rear, have groove on the fuselage rear and match with the rear of two girders, with covering both are rolled into an integral body, the front end of fuselage rear the inboard of left side plate and with the side plate lap fit, afterbody has tailplane and vertical tail mounting groove, and tailplane mounting groove lower surface and fuselage girder upper surface are at grade; Wing is by the wing mainboard, anterior half chests shape girder, the rear portion rib, reinforcing band and upper counterangle casing are formed, wing is surrounded anterior half chests shape girder and rear portion rib parcel by the wing mainboard, half chests shape girder is formed half chests shape overall structure by upright beam and the anterior arc of going up, the reinforcement dividing plate that several preceding ribs are arranged in it is semi-box beam, there are several draw-in grooves at the rear portion, rear portion rib cross section is I-shaped, there is protruding rafter the front portion and matches with draw-in groove, the wing mainboard is a monoblock, bonding overlapping bonding at the trailing edge place again with the part up and down of half chests girder and rear portion rib respectively after the bending of leading edge place, wing tip is that partly overlapping bonding back shaping forms in the tip up and down by the wing mainboard, whole wing front and rear edge and wing tip all are pasted with reinforcing band to guarantee the bonding and intensity of wing, upper counterangle casing is a whole box structure, its inner chamber and wing root outer surface match, left and right sides wing inserts upper counterangle cover box cavity and bonding respectively, whole wing outer surface can stick coverings such as heat shrinkage film to gain in strength and to beautify, for bigger wing, can cover plate or cover plate entirely at upper surface; Tailplane and elevator are by the tailplane upper plate, the tailplane lower plate, reinforced sheet, integral hinge, the elevator upper plate, the elevator lower plate is formed, vertical tail and rudder structure and tailplane and elevator structure are just the same, tailplane upper plate and tailplane lower plate are bonding and the integral hinge front portion is clipped in cements in the middle of the two, elevator upper plate and elevator lower plate are bonding and the integral hinge rear portion is clipped in cements in the middle of the two, the integral hinge middle part is stayed a bit of not sticking, the relative tailplane of elevator can be swung flexibly, reinforced sheet is pasted on the tailplane upper and lower surface respectively to increase the intensity of tailplane, and tailplane and vertical tail insert the fuselage rear respectively and open in the mounting groove, and bonding with fuselage rear and fuselage girder respectively; Undercarriage is made up of main landing gear, back undercarriage and nylon cable tie, lead frame and has tightened on fuselage girder and connector with nylon cable tie and fix, and back undercarriage directly is bonded on the fuselage girder and is wrapped on the fuselage with adhesive tape and fixes; For tricycle landing gear, then nose-gear and main landing gear are all tightened on fuselage girder and connector fixing with nylon cable tie; Control system is by pull bar; rocking arm; boring bolt and locking nut are formed; rocking arm is separately fixed on elevator and the rudder, and in the boring bolt penetrates and hole on the rocking arm and can swing flexibly, the pull bar two ends are steel wire; leading portion becomes zigzag to pack in the steering wheel steering wheel installing hole; rear penetrates in the hole that bolt bored of holing, and locks with locking nut after regulating the rudder face position, and pull bar places the fuselage outside fully; Fuselage, wing, empennage, undercarriage and control system combination installation is in aggregates, promptly constitute a shut die type aircraft.

Owing to adopt such scheme, make this model of an airplane structure very simple, make easily, be fit to industrialized mass, the model of an airplane has good flying quality and very strong viability.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is that the utility model primary structure figure Fig. 2 is that C-C cutaway view Fig. 5 that 2 conceptual scheme Fig. 4 of 4 conceptual scheme Fig. 3 of the A-A cutaway view of Fig. 1 B-B cutaway view that is Fig. 1 are Fig. 1 is that the D of Fig. 1 is that the utility model wing band aileron structure chart Fig. 7 is that the utility model engine overhead system structure chart Fig. 8 is that the biplane structure chart Fig. 9 of the utility model is among the utility model line control type structure chart figure to partial view Fig. 6: 1, fuselage girder 2, baffle plate or coating 3, connector 4, fill out core 5, reinforcement 6, nylon cable tie 7, nose-gear 8, left side plate 9, steering wheel and beginning installing hole 10, fuselage rear 11, wing mainboard 12, anterior half chests shape girder 13, strengthen dividing plate 14, rear portion rib 15, draw-in groove 16, wing tip 17, trailing edge adhesive portion 18, pull bar 19, back undercarriage 20, locking nut 21, boring bolt 22; rocking arm 23; tailplane upper plate 24; tailplane lower plate 25; reinforced sheet 26; integral hinge 27; elevator upper plate 28; elevator lower plate 29; vertical tail and rudder 30; upper counterangle casing 31; reinforcing band 32; aileron 33; compressing tablet reaches tightly because of bolt 34; steel wire rocking arm 35; rotating shaft cover 36; steering wheel installing hole and seat 37; hinge 38; engine mount 39; Hatch Opening 40; wing installing rack 41; wing installing hole 42; back 43; triangle Rocker arm 44; dormant bolt reaches and ends head nut 45; control wire a. stay bolt or stud b. nut and pad c. bushing pipe d. web e. self-tapping screw or lag bolt nut f. buttress brace.

In Fig. 1, two fuselage girders (1) and left side plate (8) connect into an integral body by three connectors (3), the girder front end has constituted engine mount, reinforcement (5) all is equipped with to guarantee the intensity of girder in the place that is drilled with the hole on the girder, be filled with core (4) in the inner space of nosing and leave the space that receiving system is installed, baffle plate or coating (2) are equipped with in the front of filling out core (4), the back contacts with fuselage rear (10), the fuselage rear has groove on (10), this groove matches with the rear of two girders (1), with covering both are rolled into an integral body, the front end of fuselage rear (10) has tailplane and vertical tail mounting groove at the inboard of left side plate (8) and with side plate lap fit and afterbody, and tailplane mounting groove lower surface and fuselage girder upper surface are at grade; Wing is surrounded anterior half chests shape girder (12) and rear portion rib (14) parcel by wing mainboard (11), there are several to strengthen dividing plate (13) in the half chests shape girder (12), there are several draw-in grooves (15) at the rear portion, rear portion rib (14) cross section is I-shaped, there is protruding rafter the front portion and matches with draw-in groove (15), the wing mainboard is a monoblock, after the bending of leading edge place, locate overlapping bonding at trailing edge (17) again with the partly bonding up and down of half chests shape girder (12) and rear portion rib (14) respectively, wing tip (16) is that partly overlapping bonding back shaping forms in the tip up and down by wing mainboard (11), whole wing front and rear edge and wing tip all are pasted with reinforcing band (31), and left and right sides wing inserts upper counterangle casing (30) inner chamber and bonding respectively; Tailplane upper plate (23) and tailplane lower plate (24) bonding and integral hinge (26) front portion is clipped in the two in the middle of cement, elevator upper plate (27) and elevator lower plate (28) bonding and integral hinge (26) rear portion is clipped in the two in the middle of cement, reinforced sheet (25) is pasted on the tailplane upper and lower surface respectively, vertical tail and rudder (29) structure and tailplane and elevator structure are just the same, tailplane and vertical tail insert fuselage rear (10) respectively and open in the mounting groove, and bonding with fuselage rear (10) and fuselage girder (1) respectively; Main landing gear (7) is tightened at fuselage girder (1) and connector (3) last fixing with nylon cable tie (6), back undercarriage (19) directly is bonded on the fuselage girder (1) and is wrapped on the fuselage fixing with adhesive tape; Rocking arm (22) is separately fixed on elevator and the rudder, boring bolt (21) penetrates that shaking hole on the stern (22) interior also can swing flexibly, pull bar (18) two ends are steel wire, leading portion becomes zigzag to pack in the steering wheel steering wheel installing hole, rear penetrates in boring bolt (21) hole of being bored, lock with locking nut (20) after regulating the rudder face position, pull bar (18) places the fuselage outside fully; Have steering wheel installing hole and switch installing hole (9) on the fuselage biside plate (8), steering wheel and switch are directly installed on the side plate with self-tapping screw or lag bolt nut, and steering wheel top and steering wheel all are exposed at outside the fuselage; Fuselage fills out core (4) and fuselage rear (10) all is shaped or cutting forming with foam plastic foaming, and can make an integral body; Fuselage girder 1 can use bamboo bar, batten, aluminium section bar, plastic or other material to make, and side plate can be made with plastic shaping or with laminate.

In Fig. 2, the connected mode between girder, side plate and the connector has four kinds:

(A-A) 1: girder (1), reinforcement (5) with and side plate (8) on installing hole is all arranged, connector (3) is made up of stay bolt or stud (a), nut and pad (b), (a) passes installing hole with bolt, and compresses with nut and pad (b) respectively in two girder inboards and outside the side plate.

(A-A) 2: girder (1) reinforcement (5), side plate all has installing hole on (8), connector (3) is made up of stay bolt or stud (a), nut and pad (b), bushing pipe (c), (a) passes installing hole with bolt, and passing bushing pipe (c) in two girder inboards, side plate external application nut and pad (b) compress.

(A-A) 3: girder (1), reinforcement (5), side plate all have installing hole on (8), connector (3) is made up of connecting plate (d), self-tapping screw or lag bolt nut (e), respectively connecting plate (d) and side plate is connected into an integral body with self-tapping screw or lag bolt nut (e).

(A-A) 4: girder (1) and connector (3) are an integral body of injection molded or drawing, the girder leading portion stud with buttress brace (f) or make real core to gain in strength, installing hole arranged on the side plate (8) and be connected on the girder with self-tapping screw or lag bolt nut (e).

In Fig. 3 (B-B): wing mainboard (11) polystyrene blowing plate (PS plate) or thicker blowing paper, anterior half chests shape girder (12), rear portion rib (14) and upper counterangle casing (30) are all used highstrenghtpiston's injection molded, the bonding place is bonding with pressure sensitive adhesive (double faced adhesive tape), and reinforcing band (31) is used sealing tape.

At (B-B) ' in the structure, the available monoblock plank of girder (12) or with batten, the compound girder of making of wood chip, rib (13 ') (14 ') is bonding with girder respectively after with plastic foamboard or blowing plate cutting forming, preceding rib (13 ') is made the better of integral body, place, the upper counterangle is connected with sleeve pipe with conventional latch, and covers plate at outer surface and strengthen.

If wing is made the two-fold upper counterangle, then anti-section can be without girder because of stressed less on the outer wing, and with wing mainboard and the direct bonding shaping of rib, junction, the upper counterangle also can be without upper counterangle casing or latch sleeve pipe direct bonding connection and strengthen at outer surface.

In Fig. 4, tailplane upper plate (23) is polystyrene blowing plate (PS) plate or thicker blowing paper with tailplane lower plate (24), elevator upper plate (27) and elevator lower plate (28) are with same material or veneer, integral hinge (26) is used sealing tape, reinforced sheet (25) is a veneer, and each partly all uses pressure sensitive adhesive bonding.

In Fig. 5.Rocking arm (22) is fixed on the elevator, and in boring bolt (21) penetrated and hole on the rocking arm (22), pull bar (18) penetrated snail (21) and hole and use locking nut (20) to lock after interior.

In Fig. 6, wing has aileron, rotating shaft cover (35), steering wheel installing hole and seat (36) directly and upper counterangle casing (30) make an integral body, steel wire rocking arm (34) one ends are fastened on the aileron (32) with compressing tablet and fastening bolt (33), the middle part penetrates in rotating shaft cover (35) hole and can swing flexibly, and it is circular that the other end becomes; Boring bolt (21) penetrates in this ring and can swing flexibly, pull bar (18) one ends become the zigzag steering wheel steering wheel of packing into, in the other end penetrates the boring bolt (21) holes, lock with locking nut (20) after adjusting the position, aileron (32) is connected the trailing edge place with some groups of hinges (37) and can swings flexibly, hinge (37) make with sealing tape and become zigzag to stick on respectively on wing and the aileron and per two be crossed as one group, fuselage side plate (8) is gone up corresponding rotating shaft cover (35) position will have breach, and wing allows rotating shaft cover (35) fall in the breach when being installed on the fuselage.

In the embodiment shown in fig. 7, the sealing of head front end, the head upper end has Hatch Opening (33) and is used to install battery, fuselage side plate (8) protrudes upward at wing front and back position place, engine mount (32) is connected with connector (3) and stretches out partly upper end, engine and fuel tank are installed in engine mount (32) front portion, and the screw Plane of rotation is avoided head promptly becomes the engine overhead system model of an airplane.

In the embodiment shown in fig. 8, leave wing installing hole (35) on the fuselage side plate (8), wing inserts in the installing hole and installs and fixes, and promptly becomes the place an order wing or midwing model aircraft; Fuselage side plate (8) is protruded upward respectively at wing front and back position place, and wing installing rack (34) is connected the extension upper end with connector (3), and wing is fixed on promptly becomes the high single-blade model of an airplane on (34); High single-blade and following single-blade are made of one, promptly become the double-vane model of an airplane.

In the embodiment shown in fig. 9, wing directly is fixed on the fuselage girder (1), on the fuselage girder of left side, fix a dormant bolt and end head nut (38) as rotating shaft, triangle rocking arm (37) is installed on the dormant bolt and can swings flexibly and block with ending head nut, pull bar (18) and control wire (39) are installed on the triangle rocking arm (37), back (36) is used the foamed plastics monolithic molding, and be fixed on the fuselage girder, back (36) front end is equipped with baffle plate or coating (2) and surface treatment to prevent the erosion of engine oil material, promptly becomes control line model aeroplane.

Claims

1, a kind of model of an airplane, by fuselage, wing, empennage, undercarriage, control system is formed, it is characterized in that: fuselage is by girder, baffle plate or coating, connector, fill out core, reinforcement, left side plate and fuselage rear are formed, two girders and left side plate connect into an integral body by several connectors, side plate is positioned at the girder outside, the connector center line is vertical with the fuselage center line, the girder front end has constituted engine mount, last mounted engine and fuel tank, reinforcement all is equipped with in the place that is drilled with the hole on the girder, be filled with core in the inner space of nosing and leave the space that receiving system is installed, baffle plate or coating are equipped with in the front of filling out core, the back contacts with the fuselage rear, have groove on the fuselage rear, this groove matches with the rear of two girders, with covering both are rolled into an integral body, the front end of fuselage rear has tailplane and vertical tail mounting groove at the inboard of left side plate and with side plate lap fit and afterbody, and tailplane mounting groove lower surface and fuselage girder upper surface are at grade; Wing is by the wing mainboard, anterior half chests shape girder, the rear portion rib, reinforcing band and upper counterangle casing are formed, wing is surrounded preceding all half chests shape girder and rear portion rib parcel by the wing mainboard, half chests shape girder is formed half chests shape overall structure by upright beam and the anterior arc of going up, there are several to strengthen the promptly preceding rib of dividing plate in it, there are several draw-in grooves at the rear portion, rear portion rib cross section is I-shaped, there is protruding rafter the front portion and matches with draw-in groove, the wing mainboard is a monoblock, bonding overlapping bonding at the trailing edge place again with the part up and down of half chests shape girder and rear portion rib respectively after the bending of leading edge place, wing tip is that partly overlapping bonding back shaping forms in the tip up and down by the wing mainboard, and whole wing front and rear edge and wing tip all are pasted with reinforcing band, upper counterangle casing is a whole box structure, its inner chamber and wing root outer surface match, and left and right sides wing inserts upper counterangle cover box cavity and bonding respectively, and whole wing outer surface can stick covering or illiteracy plates such as heat shrinkage film; Tailplane and elevator are by the tailplane upper plate, the tailplane lower plate, reinforced sheet, integral hinge, elevator upper plate and elevator lower plate are formed, vertical tail and rudder structure and tailplane and elevator structure are just the same, tailplane upper plate and tailplane lower plate are bonding and the integral hinge front portion is clipped in cements in the middle of the two, elevator upper plate and elevator lower plate are bonding and the integral hinge rear portion is clipped in cements in the middle of the two, the integral hinge middle part is stayed a bit of not sticking, the relative tailplane of elevator can be swung flexibly, and reinforced sheet is pasted on the tailplane upper and lower surface respectively; Undercarriage is by main landing gear, back undercarriage and nylon cable tie are formed, main landing gear is tightened on fuselage girder and connector fixing with nylon cable tie, back undercarriage directly is bonded on the fuselage girder and is wrapped on the fuselage fixing with adhesive tape, to tricycle landing gear, nose-gear and main landing gear are all tightened on fuselage girder and connector fixing with nylon cable tie; Control system is made up of pull bar, rocking arm, boring bolt and locking nut; rocking arm is separately fixed on elevator and the rudder; in the boring bolt penetrates and hole on the rocking arm and can swing flexibly; the pull bar two ends are steel wire; leading portion becomes zigzag to pack in the steering wheel steering wheel installing hole; rear penetrates in the bolt of holing holes, and locks with locking nut after regulating the rudder face position, and pull bar places the fuselage outside fully.

2, the model of an airplane according to claim 1 is characterized in that: the fuselage girder can use bamboo bar, batten, aluminium section bar, plastic or other material to make, and side plate can be made with plastic shaping or with laminate, and the connected mode between girder, side plate and the connector has four kinds:

A: girder, installing hole is all arranged on reinforcement and the side plate, connector is made up of stay bolt or stud and nut and pad, with stay bolt or stud passes installing hole and in the girder inboard and the side plate outside compress with nut and pad respectively, B: girder, installing hole is all arranged on reinforcement and the side plate, connector is by stay bolt or stud, nut and pad and bushing pipe are formed, stay bolt or stud are passed installing hole, and in the middle of passing bushing pipe in two girder inboards, side plate external application nut and pad compress, C: girder, reinforcement, installing hole is all arranged on the side plate, connector is formed by connecting plate with from screw or lag bolt nut, with respectively connecting plate and girder and side plate being connected into an integral body from screw or lag bolt nut, D: girder and connector are an integral body of injection molded or drawing, the girder leading portion studs with buttress brace or makes real core, installing hole is arranged on the side plate and use from screw or lag bolt nut to be connected on the girder.

3, the model of an airplane according to claim 1 is characterized in that: have steering wheel installing hole and switch installing hole on the fuselage biside plate, steering wheel and switch are directly installed on the side plate with self-tapping screw or lag bolt nut, and steering wheel top and steering wheel all are exposed at outside the fuselage.

4, the model of an airplane according to claim 1 is characterized in that: fuselage fills out core and the fuselage rear all is shaped or cutting forming with foam plastic foaming, and can make an integral body.

5, the model of an airplane according to claim 1, it is characterized in that: wing mainboard polystyrene blowing plate (PS plate) or thicker blowing paper, anterior half chests shape girder, rear portion rib and upper counterangle casing are all used highstrenghtpiston's injection molded, the bonding place is bonding with pressure sensitive adhesive (double faced adhesive tape), the reinforcing band sealing tape, another structure girder can or be used batten with the monoblock plank, the compound girder of making of wood chip, rib is bonding with girder respectively after with foamed plastics or blowing plate cutting forming, preceding rib can be made integral body, place, the upper counterangle is connected with sleeve pipe with conventional latch, and cover plate at outer surface and strengthen, if the wing two-fold upper counterangle, then anti-section can be without girder on the outer wing, and with wing mainboard and the direct bonding shaping of rib, junction, the upper counterangle also can be without upper counterangle casing or latch sleeve pipe and directly bonding connection and strengthen at outer surface.

6, the model of an airplane according to claim 1, it is characterized in that: wing has aileron, the aileron part is by aileron compressing tablet and fastening bolt, the steel wire rocking arm, the rotating shaft cover, steering wheel installing hole and mount pad, hinge, pull bar, the boring bolt, locking nut and upper counterangle casing are formed, the rotating shaft cover, steering wheel installing hole and seat and upper counterangle casing are made an integral body, steel wire rocking arm one end is fastened on the aileron with compressing tablet and fastening bolt, steel wire rocking arm middle part penetrates in the rotating shaft trepanning and can swing flexibly, the steel wire rocking arm other end becomes circular, the boring bolt penetrates in this ring and can swing flexibly, pull bar one end becomes the zigzag steering wheel steering wheel of packing into, in other end boring bolt is holed, lock with locking nut after adjusting the position, aileron is connected the trailing edge place with some groups of hinges and can swings flexibly, hinge can with sealing tape make and become zigzag to stick on respectively on wing and the aileron and per two be crossed as one group, corresponding rotating shaft cover position will have breach on the fuselage side plate, and wing allows the rotating shaft cover fall in the breach when being installed on the fuselage.

7, the model of an airplane according to claim 1, it is characterized in that: the sealing of head front end, the head upper end has Hatch Opening, the fuselage side plate protrudes upward at wing front and back position place, engine mount is connected with connector and stretches out partly upper end, engine and fuel tank are installed in the engine mount front portion, and the propeller Plane of rotation is avoided head, become the engine overhead system model of an airplane.

8, the model of an airplane according to claim 1 is characterized in that: have the wing installing hole on the fuselage side plate, wing inserts in the installing hole and installs and fixes, and becomes single-blade or midwing model aircraft down; The fuselage side plate is protruded upward respectively at wing front and back position place, and the wing installing rack is fixedly connected on the extension upper end with connector, and wing is fixed on the wing installing rack, becomes the high single-blade model of an airplane; High single-blade and following single-blade are made of one, promptly become the double-vane model of an airplane.

9, the model of an airplane according to claim 1, it is characterized in that: wing directly is fixedly mounted on the fuselage girder, on the fuselage girder of left side, fix a countersunk head nut and end head nut as rotating shaft, the triangle rocking arm is installed on the dormant bolt and can swings flexibly, and block with ending head nut, pull bar and control wire are installed on the triangle rocking arm, back is with the foamed plastics monolithic molding and be fixedly mounted on the fuselage girder, the back front end is equipped with baffle plate or coating and surface treatment, becomes control line model aeroplane.