The sail mold  foundation knowledge(1)- the benefit principle of BONU 
 
   If two hands are each to take a thin paper, make their distance about 6 rices of cm. of 4~.Then use the mouth toward these two papers to blow breath in the center, you will see,
 
 These two papers not only did not separate, closed to mutually on the contrary, but also use most the air speed of blow is more big, two paper close to more.
 
 
   Can see from this phenomenon, the remote control airplane be two paper in the center the free current of air is dated, press strong diminish, the paper presses outside strong ratio paper inside big, inside outside of press strong bad chase
 
 Two papers go toward to press in the center.In the center the speed of the air current is more quick, the press of outside inside the paper is strong bad also more big.
 
 
 The sail mold  foundation knowledge(2)- the plane wing rises the dint principle
 
 
   A wing of the airplane plane wing section is called the wing type again, a bluntness of head of the general wing type, carry behind sharp, ascend the surface arch to rise and descend the surface more even, present the fish side
 
 Form.The head orders to be called the ex- good luck, good luck after carrying to order to be called behind, the on-line between 2:00 is called the wing 弦 .When the current of air flows through the plane wing right against the face, because of the plane wing ground
 
 Insert, is be divided into two of top and bottom.After passing the plane wing, at after the good luck is again heavy to synthesize a.Because plane wing last the surface arch rise, that current of air that is above
 
 Of passage narrow down.The remote control airplane can know according to the continuous sex principle and the 伯努  benefit axiomses of the current of air, the plane wing above presses the strong ratio plane wing to under press strong and small, also
 
 Is to say, plane wing next the surface is compare by upward pressure plane wing last the surface is want by downcast pressure greatly, this pressure is bad is a plane wing to rise outputly
 
 Dint.
 
 
 The sail mold  foundation knowledge(3)- lose soon principle
 
 
   Within the scope of the plane wing faces the Cape smaller, rise the dint along with face the enlargement of the Cape but enlarge.But, when face the Cape enlargement to a certain value, rise the dint and then no longer increase
 
 Add.Face the Cape to be called by this time critical face the Cape.Exceed critical face the Cape after, face the Cape again enlargement, the resistance increment, rise the dint to let up on the contrary.This now
 
 The elephant is called to lose soon.
 
 
   The creation reason lose soon is:Because of the increment that face the Cape, on the plane wing surface formerly the good luck arrives the apogee to press strong let up and from apogee to behind the good luck presses the strong aggrandizement
 
 Of circumstance is more outstanding.Exceed critical face the Cape hereafter, current of air at flow through the apogee of the plane wing not much far, separate superficially from the wing;, At
 
 After wing face the half part produces the very big 涡 to flow, resulting in resistance increase, rising the dint to let up.
 
 
 The sail mold  foundation knowledge-(4) The artificial 扰 flows the project
 
 
   To postpone the occurrence lose soon, will think that the way makes night of current of air some to separate from the plane wing.If the plane wing surface is a layer to flow the boundary layer, the current of air is more easy
 
 Separate;If is a 絮 to flow the boundary layer, more difficult separation of current of air.Also is to say, for postponing to lose soon, want to result in the 絮 flow the boundary in the plane wing surface
 
 Layer.Generally speaking, Renault the number enlarge, plane wing the layer of the surface flows the boundary layer to become the 絮 to flow the boundary layer easily.But, the speed of the model plane is very
 
 Low, the wing 弦 is very small, so the Renault counts the impossible aggrandizement very greatly.To postpone the model plane occurrence lose soon, must think the another way.People
 
 The detection flows through the artificial 扰 , can also make the layer flow the boundary layer to become the 絮 to flow the boundary layer.The concrete way of doing is a lot of, among them an is the ex- good luck department of surface is on the plane wing
 
 The cent stick up thin sand paper or glue up ground sawdust;B is near ex- parts ofs of good luck of surface ascended a thin wood or thick 扰s to flow the line on the plane wing;C is at
 
 Ex- good luck part of the plane wing wing exhibition, separate to certainly be apart from to open perpendicularly each time on clapping to round to flow the bore;D is fore the good luck glues before an elastic round to flow the line;E is at
 
 The ex- good luck glue up present the falsely capillaceous 扰 to flow the machine;F is fore the good luck glues to flow the machine up the teeth of a saw form 扰 .
 
 
 The sail mold  foundation knowledge(5)- an each parts of name of wing
 
 
   Each parts of name of the wing type.The wing 弦 is the base line of the wing type, it is the ex- good luck point together behind the good luck order of on-line.The medium curve mean up the curve and the bottom curve
 
 Of inside slice an on-line of center of a circle.
 
 
 The biggest and curved degree of medium curve uses the medium  curve apogee to arrives the distance of the wing 弦 to mean.Within the scope of certain, bend the degree more big, rise the 阻 to compare more big.But super
 
 Led this scope, the resistance enlarge very quickly, rising the 阻 to compare to descend on the contrary.The medium curve apogee arrives the distance of the wing 弦 is 4% ～ that the wing 弦 grow generally
 
 In 8% the curve apogee position together plane wing last the characteristic of the surface boundary layer have very the toll-gate department.The medium curve apogee of the 竞  hour model plane  wing type to ex- good luck
 
 Of distance is 25%,50% of the wing 弦 generally.The biggest thickness of the wing type mean to descend of the curve together up the curve inside slice the round and biggest diameter.General come
 
 Say, the thickness is more big, the resistance is also more big.And under the condition of the low Renault number, the plane wing surface keeps the layer to flow the boundary layer easily.Therefore, the model of hour of 竞
 
 The airplane wants to adopt the thinner wing type.A biggest thickness of wing an is 6%,8% of the wing 弦 .But, the line manipulates the stunt model plane exception, its
 
 A biggest thickness of wing can attain 12%,18% of the wing 弦 .A biggest thickness position of wing also has to the plane wing surface  boundary layer characteristic to affect very greatly.
 
 An ex- good luck radius of wing comes to a decision" point" or" bluntness"s of a forepart of wing, the ex- good luck radius is small at facing the Cape greatly to separate easily under the current of air, making the model plane
 
 Of stability decayed, the ex- good luck radius has advantage to the stability greatly, but the resistance enlarges again.
 
 
 
 The sail mold  foundation knowledge(6)- a category of wing
 
 
 The in common use model plane  wing type is symmetry, the double is convex, even and convex and cave and convex, the s form waits several kinds
 
 
   The medium curve and the wing 弦s of the symmetry wing type are heavy to match, ascending the curve and the bottom curves are symmetry.A resistance of this kind of wing coefficient is smaller, but rise the 阻 to compare also small.General
 
 On-line manipulate or control from a distance the stunt model plane ascend
 
 
   The last curve and the bottom curveses of a convex wing type are all outwardly convex, but the curved degree of the top curve compare the curve is big.This kind of wing type compares the symmetry wing type to rise the 阻 to compare greatly.
 
 General use on-line manipulate the 竞 soon or control from a distance the stunt model plane last
 
 
   The next curve of the even and convex wing type is a straight line.This kind of wing type is biggest and rise the 阻 and compare and to be bigger than a pair of convex wings type.General use at soon the not that high entry-level line of 摩 hold
 
 Though does the remote control model plane last
 
 
   The next curve of the cave and convex wing type to inside cave go into.This kind of wing type can produce bigger rise the dint, rise the 阻 to compare also more and greatly.Extensive use at contest and stay and get empty horary
 
 On the model plane
 
 
 The S form that the medium curve elephant of the S form wing type lay down horizontally.The dint 矩 characteristic of this kind of wing type is stable, can use on the model plane of have no level  tail wing
 
 
 The sail mold  foundation knowledge(7)- propeller
 
 
   The propeller is a kind of to become the device of pull the dint to the motive that launches the machine.The efficiency of the propeller is high and low and will affect the flight result of the model plane directly.
 
 
   The propeller oar  leaf\'s work principle is similar to plane wing is very.If oar the leaf dismantles to observe, will discover that it is the plane wing that a distortion wear.Oar
 
 Leaf\'s section and the plane wing section are about.The oar  differentiation of the leaf and plane wing lie in, the up in the air sport of plane wing is even to move basically of, but oar leaf since round
 
 Wear the oar stalk revolve, again along with thousand headways of airplane.The propeller pull the dint is to depend the up in the air sport of leaf of oar but output.Because the leaf\'s current 旋 of oar
 
 The transport move, and then have to exercise forward, so blew the oar  leaf\'s current of air to include two parts:A part is come from the on the side perpendicularity in the oar stalk of current of air, another a
 
 The part is a current of air that come from front\'s running parallel with the oar stalk.
 
 
 The sail mold  foundation knowledge(8)- plastics and the compound material
 
 
   Plastics and the compound material of higher than strength, the chemistry stability is better, not easy transform.The specific weight of the general plastics about in 2.2 grams of dint of 0.83~/ sign the square
 
 Of the rice of 厘 , is about the half of the aluminum.The specific weight of the foam plastics onlies have 0.03 gram dint/ cubic centre-metre rices of 0.02~.Therefore, plastics and compound material is at
 
 In addition to timber the usage is most extensive and have most the material of develop the prospect in the aviation model.Although they can\'t replace completely still in the aviation model realm
 
 Timber, but the comparison affirmation that they have would be more and more big, and bring about aggressive influence on the development of the aviation model.In common use plastics of the aviation model
 
 And the compound material contain the hard quality  foam plastics, note the piece of 塑 , the plank material heat to press the piece, the glass steel and the graphite fiber etc..In addition, still have the plastics of the hot type of 缩 to receive
 
 , It will replace the traditional paper of 绵 and the nylon 绢s to receive the skin.
 
 
 Hard quality foam plastics.The in common use and hard quality  foam plastics gathers the hard foam plastics of styrene, hard foam plastics of PVC, gather the hard foam 塑 of the ammonia fat
 
 Anticipate, gathering the hard foam plastics of styrene blows the paper of 塑 .The hard quality  foam plastics is the plastics material that the usage is most and most develops the prospect in the aviation model.
 
 Can according to the different request of the model, choose different strength and the foam plastics of the specific weights.Process the hard quality  foam plastics very convenient, can use to process the wood
 
 The method of the material carry on, can also use to give or get an electric shock the hot silk to incise, can also become to criticize the production with the method of the mold 塑 .
 
 
   Note the piece of 塑 and plank material heats presses the piece.Can used for the material that notes the piece of 塑 and plank material heats to press the piece a lot of, in common usely gather the ethylene, polypropylene and gather the benzene B
 
 烯 , PVC, ABS, nylon etc..Note the piece of 塑 to mainly use in the aviation model to manufacture the propeller, oar hat, commutate the cover and launch the machine,
 
 Various deal with contact and shake arm etc..Also have the whole model planes to all note the 塑 .The characteristics that notes the piece of 塑 is to manufacture various complicated spare parts, the large quantity living
 
 Produce the efficiency high, the cost is also lower, but because the molding tool is more expensive, the unwell proper and a little amount or single piece produce.The plank material heat press the piece and can be use to create the thin hull machine
 
 Body, the cabin cover, cover hull, pinion etc..Produce the equipments of these plasticses spare parts simple, the molding tool fee is low, therefore, can organize the small batch quantity production.
 
 
 Glass steel.It is to use glass fiber and the resin compound material of gum combine but becomes.It can strengthen with the part in the wood structure in the aviation model and
 
 The surface strengthen up, can also strengthen with the surface in hard foam plastics up, the formation compound mezzanine structure.Can also create alone the thin hull piece, such as
 
 Fuselage of airplane, commutate to cover etc..Its characteristics is a strength big, the weight is light and processes to model the convenience, suiting a production.
 
 
   Graphite fiber.Convenient strengthen in the part of the structure in the aviation model up.It usually combines the usage with the resin gum, the graphite fiber resin that make use of to prepare to make
 
 Slice, stick the part that strengthens in beam or other demandses of wing up
 
 
 The sail mold  foundation knowledge(9)
 
 
   An is placed in the level appearance of model plane, put at perpendicular mutually of three flat surface are in the center, and make the stalk of 纵 of the fuselage of airplane hanged with a flat surface
 
 Keep, together another two flat surface parallelism.If we distinguish to see the model plane in the enough far place from three directions, and shape painting that see at
 
 On each flat surface, also is on three mutual perpendicular flat surfaces to make a projection of model plane, then chase these three mutually perpendicular flat surface exhibition
 
 Open, can get the diagram right three diagram- crests that shows see the diagram, the side sees the diagram and sees the diagram before.Under the condition of general, pass these three see the diagram and can compare
 
 Mean a shape of model plane and main sizes ofs accurately at the time of drawing the model plane diagram paper physically, for saving the diagram paper, these three
 
 The position of the diagram not necessarily shines on the figure 1 right show to place, but more the tightly packed ground exhausts together.But no matter how it is place, we must train the oneself
 
 Can press three see the principle of the diagram, imagine the stereoscopic model plane of an integrity of.
 
 
 The paper some places of the model plane diagram of the actual usage are not complete according to cast shadow the relation to draw of, the time that sees the diagram paper wants to notice this, in the diagram
 
 The crest of the paper sees in the diagram, the last anti- Cape and the gearing Capeses of the plane wing and the level tail wing were all put even, is a plane wing and the level tail wing solid the object size on the diagram
 
 Size of 际 , not their projection size.Do like this since easy to painting, also easy to creation.Therefore, do not think are all up the anti- Cape and the gearing Capeses
 
 Be equal to zero.Anti- Cape in manufacture want according to seeing the diagram before to the certain plane wing and the level tail wing of, saw the diagram according to the side to the certain plane wing and level tail wings
 
 Install the Cape.
 
 
 Because the great majority model planes are all or so and symmetry, therefore, while drawing the crest of the model plane to see the diagram, chase the plane wing and the level tail wings only accurate
 
 The ground draws a half all right.The time that sees the diagram do not think that this airplane onlies have the half side plane wing and half side level tail wings.In some model planes of
 
 On the diagram paper before abridging see the diagram, mark clearly only up the size of the anti- Cape or draw only a contracted of saw the diagram before.Because saw the diagram to just rose to mean before up the anti- Cape
 
 Function.
 
 
 The diagram paper of the model plane is different to choose site for capital the painting to become the original thing size.It can press certain comparison to enlarge or contract.But want to note the comparison on the diagram paper.Example
 
 Is the half of the original object size such as the diagram paper, can note on the diagram paper:" Comparison 1/2".Some diagram papers will draw a surveyor\'s rod of to come, on the scale of
 
 Engrave what degree represent is an actual size.Have its advantage with the scale, regardless the diagram paper how zoom, the scales on the diagrams can mete out the model expediently
 
 Actual size of the airplane.
 
 
 Attention:On the model plane diagram paper, national standard of general usage the lines river sign of the provision, need to be explain, did not mark the unit specially on the diagram paper of
 
 Size all with millimeter for unit of, the width of the form of 剖 links together with thick two sizeses with the multiplication sign.For example a 5 of breadth, thick 2 millimeter of
 
 Beam, use"5 x2s" on the diagram paper.
 
 
 The sail mold  foundation knowledge(10)- plane wing resistance
 
 
   As long as object and the air contain opposite sport, the inevitable free spirit  resistance function is on the object.The function mainly rubs the 阻 in the resistance on the model plane
 
 Dint, press the bad resistance and induce the resistance.
 
 
 Rub the resistance:When the air flows through the plane wing surface, because the air glues sex function, will produce to rub the 阻 between the air and the plane wing surface
 
 Dint.If the boundary layer of the plane wing surface is a layer to flow the boundary layer, the air glues the friction resistance that sex cause smaller, if superficial boundary layer of plane wing
 
 The 紊 flows the boundary layer, the air glues the friction resistance that sex cause more and greatly.
 
 For reducing the friction resistance, can reduce the model plane together the contact area of the air, can also do the model plane surface a little smoother.But is not more
 
 Smooth more good, the layer flows the easy separation of the current of air of the boundary layer because the surface is too smooth, keeping the layer to flow the boundary layer easily,, will make press the bad resistance consumedly
 
 Increase.
 
 
 Press the bad resistance:A piece of flat panel, run parallel with the current of air to exercise the resistance is smaller, the perpendicularity exercises in the current of air the resistance is more and greatly, such as the figure 1 show.Because this kind of
 
 Resistance is because the flat panel exists the pressure in front and back bad but cause of, so, we be called this kind of resistance to press the bad resistance.If carry on further grinding
 
 Investigate, can see, the basic reason that produces this pressure to differ is still because the air glues sex.Press the bad resistance together the shape of the object, the object is in the current of air
 
 Medium carriage and object of biggest aweather area etc. is relevant, among them, the most is together the shape of the object relevant.If at that perpendicularity in current of air
 
 Of the flat panel front and behindses all plus the cover of the sharp spheroid, become the streamlined shape, it press bad the resistance can let up consumedly, have of can let up
 
 90%.So, the partses of the general model plane all adopt the streamlined.
 
 
 Under the condition of usual, the resistance of the plane wing mainly is to press the bad resistance and rub the resistance.Their and is almost a total resistance, be called a 阻 of wing
 
 Dint.But, these two kinds of resistances are in total resistance the comparison have has the variety with the dissimilarity of the object shape.Rub for the streamlined and good object
 
 The resistance is main, for streamlined not good of object, press the bad resistance is main.
 
 
 The sail mold  foundation knowledge(11)- induce the resistance
 
 
   Induce the resistance: both ends in plane wing, plane wing under the big current of air of the surface pressure rounds the pinion, flowing toward the low-pressure area of the plane wing surface, hence in the wing
 
 Carry the formation the general 涡 flow.It changes the wing to carry the current of air direction that the neighborhood flows through the plane wing, causing the additional resistance.Because it is to rise the dint inducement to come out
 
 Of, so be called the inducement resistance.
 
 
 The way that lets up to induce the resistance is to enlarge the exhibition 弦 to compare.General be called the wing exhibition to the distance that the plane wing two wings carry.The wing exhibition and the ratio of the wing 弦 is called the exhibition 弦
 
 Ratio, if the plane wing is again thin again long, namely its exhibition 弦 compare greatly.The exhibition 弦 compare more big, induce the resistance also more small.Moreover, can also chase the plane wing shape
 
 Make into the trapezoid or ovals, these two kinds of inducement resistances of shape plane wing are smaller than the inducement resistance of the rectangle plane wing.
 
 
 The sail mold  foundation knowledge(12)- launch the regulation of the machine usage
 
 
   Launch the machine to want the gearing firmness on the model plane, launch the machine is of several fix the point to is want by dint even, do not have that the creation transforms the asymmetry of the trend
 
 Be subjected to the dint.Launch the machine to still need to have to certainly reduce to shake the function.
 
 
 The strength that launches the machine does not want to be too greatly, launching the machine while being the airplane to drop down thus is first bad, can let up to launch the machine damage degree.Moreover, can be also
 
 Launch by let the machine before go toward stretch, can rise the function of protect the oil needle.
 
 
 Because the aviation model launches the machine to become soon very high, the hour of usage must notice the safety, otherwise causing the serious trouble easily.Do not use the metals propeller,
 
 The propeller that did not use to damage and glue.Propeller and oar hat etc.s revolve the part must fix good, the in order to prevent high speed revolve jilt out the wound
 
 Person.Start the contemporaries wants to stay away the propeller to revolve the flat surface, the finger do not run into the propeller while adjusting to launch the machine.
 
 
   Want for the poisonous and combustible fuel to take care of sternly.Use to operate carefully, can not near fire, can not entrance.The model plane wants after fly to hair
 
 The motive carries on the check, maintaining in time.If no longer flew on that day, want to make the fuel tank remain the oil inside of suck out, counteract the gasoline to clean to launch the machine inner part.
 
 Annoy a drop to go into a few castor oils from the row after clean, then turn several next propellers, make castor oil enter launch the machine.Then wrap with the cloth good.
 
 
   Meet to fall off the airplane trouble to want the appropriate processing.Be stained with the full mud to launch the machine to pick up back hereafter, slice can\'t turn to move the propeller stalk, otherwise piston and cylinder
 
 The meeting was waited the dirty thing to row the wound by the sand grain, resulting in severity leak air.The processed method uses to inject the machine to flush to launch the exterior of 枧 first, then launch the machine to tear open, 彻
 
 The bottom cleans each spare parts, and check their damage degree.Finally launch the machine and pack and like, run-in empress again use.