GliderIreland - Ireland RC Forum - Flying Model forum in Ireland
Planes => Indoor => Topic started by: alle on January 09, 2011, 13:38:19 PM
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Materials:
several rods, taken from a plate 3 / 32, all measuring 25cm
(being equal to 2 wings, 2 equal to the elevator and rudder, the preference of the elevator and rudder a little thinner and about 3 or 4 ribs for the wing, the elevator and rudder, like those)
ca glue (use super bond)
harmonic steel wire (one that is used to link aircraft)
seam line (it's thinner)
market sling (I use because it does not shrink in the heat of the trunk of the car)
bead 1
toothpick some
a piece of balsa 3 / 32 and sanded to helice
brass tube (at home fishing finds easy)
Tools
steel blade or razor blade''''
needle-nose pliers
ruler
Fuselage
part of the elastic traction is enhanced
(http://img547.imageshack.us/i/pict0020369.jpg/)(http://[URL=http://img547.imageshack.us/i/pict0020369.jpg/][img]http://img547.imageshack.us/img547/2258/pict0020369.jpg)[/URL][/img](http://[URL=http://img3.imageshack.us/i/pict0019176.jpg/][img]http://img3.imageshack.us/img3/964/pict0019176.jpg)[/URL][/img](http://[URL=http://img716.imageshack.us/i/pict0015970.jpg/][img]http://img716.imageshack.us/img716/9665/pict0015970.jpg)[/URL][/img]
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Making the propeller shaft bearings
a piece of steel wire + - 3cm
a brass tube
Usually set with ca, then wrap the line tight and more ca
(http://[URL=http://img39.imageshack.us/i/pict0021910.jpg/][img]http://img39.imageshack.us/img39/7365/pict0021910.jpg)[/URL][/img](http://[URL=http://img707.imageshack.us/i/pict0022212.jpg/][img]http://img707.imageshack.us/img707/8246/pict0022212.jpg)[/URL][/img]
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Fixing bearing and hook that holds the engine in the fuselage
(http://[URL=http://img156.imageshack.us/i/pict0024983.jpg/][img]http://img156.imageshack.us/img156/8826/pict0024983.jpg)[/URL][/img]
(http://[URL=http://img27.imageshack.us/i/pict0025179.jpg/][img]http://img27.imageshack.us/img27/6763/pict0025179.jpg)[/URL][/img]
(http://[URL=http://img135.imageshack.us/i/pict0028640.jpg/][img]http://img135.imageshack.us/img135/7553/pict0028640.jpg)[/URL][/img]
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Making wings, elevator and rudders
Wing 6-8 inches of rope and a wingspan of 25cm, using five straight grained.
Elevator and rudder at least 2cm shorter the rope, the same scale, also use five straight grained.
The division of the ribs on the wing, where the center in March 12.50 cm, the rest divided equally.
The division of the elevator ribs are different because the rudders are together, the center in March, I leave 2 to 3 inches of rudder at each end of the elevator.
(http://[URL=http://img27.imageshack.us/i/pict0016130.jpg/][img]http://img27.imageshack.us/img27/9618/pict0016130.jpg)[/URL][/img]
(http://[URL=http://img155.imageshack.us/i/pict0018152.jpg/][img]http://img155.imageshack.us/img155/6268/pict0018152.jpg)[/URL][/img]
(http://[URL=http://img135.imageshack.us/i/pict0017159.jpg/][img]http://img135.imageshack.us/img135/7356/pict0017159.jpg)[/URL][/img
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Screened wing, elevator and rudders.
Open the bag
Ca pass on the wing
Cover the wing with plastic stretched over the finger and settle down to the plastic
Do the same with the elevator and rudder
(http://[URL=http://img521.imageshack.us/i/pict0029206.jpg/][img]http://img521.imageshack.us/img521/5453/pict0029206.jpg)[/URL][/img]
(http://img441.imageshack.us/img441/9221/pict0030879.jpg) (http://img441.imageshack.us/i/pict0030879.jpg/)
(http://[URL=http://img262.imageshack.us/i/pict0033180.jpg/][img]http://img262.imageshack.us/img262/8381/pict0033180.jpg)[/URL][/img]
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Cutting the remains of the wing, the elevator and rudder
(http://[URL=http://img59.imageshack.us/i/pict0035187.jpg/][img]http://img59.imageshack.us/img59/2582/pict0035187.jpg)[/URL][/img]
(http://[URL=http://img171.imageshack.us/i/pict0031209.jpg/][img]http://img171.imageshack.us/img171/1007/pict0031209.jpg)[/URL][/img]
(http://[URL=http://img715.imageshack.us/i/pict0032112.jpg/][img]http://img715.imageshack.us/img715/595/pict0032112.jpg)[/URL][/img
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Making the dihedral of the wings (which is polyhedron) and the rudders.
I always start by the middle of the wing, I'll even break some fibers warping step ca ai ai and let dry again ca.
The rudders are at right angles as it is harder to break down some fiber, so sometimes I have to for a few props, this case did.
(http://[URL=http://img204.imageshack.us/i/pict0036619.jpg/][img]http://img204.imageshack.us/img204/7280/pict0036619.jpg)[/URL][/img]
(http://[URL=http://img209.imageshack.us/i/pict0038495.jpg/][img]http://img209.imageshack.us/img209/8081/pict0038495.jpg)[/URL][/img]
(http://[URL=http://img703.imageshack.us/i/pict0037405.jpg/][img]http://img703.imageshack.us/img703/8893/pict0037405.jpg)[/URL][/img]
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Angle of attack of the wing.
I leave almost equal use 1 or 2 mm difference in the leading edge of the board to escape, usually do well Fortinho media wing, broke the previous always there.
(also is leaving the adjustable angle of attack there are several ways, but is for another time)
(http://[URL=http://img808.imageshack.us/i/pict0028707.jpg/][img]http://img808.imageshack.us/img808/2492/pict0028707.jpg)[/URL][/img]
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Propeller Shaft
Always make the helices fixed.
I hook shaft, while the bearing, put the bead and helice, drop and roll ca a little line and ca again, that the maximum of attention to helice should form an angle of 90 degrees with the shaft.
(http://[URL=http://img341.imageshack.us/i/pict0042237.jpg/][img]http://img341.imageshack.us/img341/8123/pict0042237.jpg)[/URL][/img]
(http://[URL=http://img153.imageshack.us/i/pict0043208.jpg/][img]http://img153.imageshack.us/img153/807/pict0043208.jpg)[/URL][/img]
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Prop
materials
piece of balsa 1 / 16 or 3 / 32 and sanded
toothpick
Mark the center of the toothpick and stick with the drill or own wire if wire has to have patience.
(http://[URL=http://img842.imageshack.us/i/imagem22002182.jpg/][img]http://img842.imageshack.us/img842/2661/imagem22002182.jpg)[/URL][/img]
(http://[URL=http://img232.imageshack.us/i/imagem22004721.jpg/][img]http://img232.imageshack.us/img232/7946/imagem22004721.jpg)[/URL][/img]
(http://[URL=http://img209.imageshack.us/i/imagem22003138.jpg/][img]http://img209.imageshack.us/img209/3081/imagem22003138.jpg)[/URL][/img]
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Toothpick ready to receive the country, use a toothpick to be strong and lightweight, I got tired of breaking helices landing.
Drawing the tr, trace a straight 6 or 7 cm, do one side.
(http://[URL=http://img522.imageshack.us/i/imagem22005155.jpg/][img]http://img522.imageshack.us/img522/6145/imagem22005155.jpg)[/URL][/img]
(http://[URL=http://img716.imageshack.us/i/imagem22006725.jpg/][img]http://img716.imageshack.us/img716/7850/imagem22006725.jpg)[/URL][/img](http://
[URL=http://img4.imageshack.us/i/imagem22007101.jpg/][img]http://img4.imageshack.us/img4/3581/imagem22007101.jpg)[/URL][/img]
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Now cut out that side done twice exactly in the middle and drawing the other side to be equal.
img](http://img816.imageshack.us/img816/9137/imagem22008704.jpg) (http://img816.imageshack.us/i/imagem22008704.jpg/)[/img]
(http://[URL=http://img513.imageshack.us/i/imagem22009270.jpg/][img]http://img513.imageshack.us/img513/6295/imagem22009270.jpg)[/URL][/img](http://[URL=http://img153.imageshack.us/i/imagem22010699.jpg/][img]http://img153.imageshack.us/img153/1374/imagem22010699.jpg)[/URL][/img]
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Ready propeller blade, you just draw on the raft and cut the center's patients should be drawn to the collage.
(http://[URL=http://img825.imageshack.us/i/imagem22012437.jpg/][img]http://img825.imageshack.us/img825/5602/imagem22012437.jpg)[/URL][/img]
(http://[URL=http://img34.imageshack.us/i/imagem22015126.jpg/][img]http://img34.imageshack.us/img34/5820/imagem22015126.jpg)[/URL][/img](http://[URL=http://img153.imageshack.us/i/imagem22016151.jpg/][img]http://img153.imageshack.us/img153/5240/imagem22016151.jpg)[/URL][/img]
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Now cut and place the cut exactly in half (so the drawn line), to engage the toothpick, it is important that the cuts are equal in both propeller blade
. (In all plants of p-25 I noticed that the size of helice was no more than 15cm, so I try to keep this measure)
(http://[URL=http://img683.imageshack.us/i/imagem22017742.jpg/][img]http://img683.imageshack.us/img683/7549/imagem22017742.jpg)[/URL][/img]
(http://[URL=http://img151.imageshack.us/i/imagem22019405.jpg/][img]http://img151.imageshack.us/img151/7766/imagem22019405.jpg)[/URL][/img]
(http://[URL=http://img706.imageshack.us/i/imagem22020246.jpg/][img]http://img706.imageshack.us/img706/5868/imagem22020246.jpg)[/URL][/img]
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What is the angle of attack of the propeller?
This subject is very complex, has many variants in this model by using motor 3 / 32, let an angle less than the plants I have seen P-25.
(http://img262.imageshack.us/img262/5286/3322d.jpg) (http://img262.imageshack.us/i/3322d.jpg/)
(http://[URL=http://img210.imageshack.us/i/imagem22021114.jpg/][img]http://img210.imageshack.us/img210/317/imagem22021114.jpg)[/URL][/img]
(http://[URL=http://img35.imageshack.us/i/imagem22022128.jpg/][img]http://img35.imageshack.us/img35/1319/imagem22022128.jpg)[/URL][/img]
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Model Ready
(http://img526.imageshack.us/img526/8964/pict0049105.jpg) (http://img526.imageshack.us/i/pict0049105.jpg/)
(http://[URL=http://img833.imageshack.us/i/pict0040433.jpg/][img]http://img833.imageshack.us/img833/9640/pict0040433.jpg)[/URL][/img]
(http://[URL=http://img340.imageshack.us/i/011111.jpg/][img]http://img340.imageshack.us/img340/4177/011111.jpg)[/URL][/img]
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Video of a P-25 that I built.
http://vimeo.com/15232057
and another model that did dumb, but good flight
http://www.youtube.com/watch?v=_4Wp6w8CV6s
Trimming for each model has its own way.
hug
alle