SouthernX-2 (Southern Cross 2) 
EPP fan fly 
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Since various data was taken by SouthernX of No. 1 
It decided to make No. 2 based on the experience. 

The body is the lozenge Aileron structure using the EPP board which is 4mm this time because of lightweight-izing. 
It decided not to stick a film. 
Although it tends to become heavy in weight using PJS550, 300g is aimed at somehow. 
Supposing a thrust is 550g by this weight, I will think that remarkable performance is shown. 

Aileron  and a tail also serve as a product made from EPP, and it will further be hard coming to break. 
The main wings are the rib group structure of EPP. 
Furthermore, a horizontal stabilizer is also the rib group structure of EPP, and it is due to become an all premature start. 

Moreover, especially this body has raised the performance of a knife edge. 
It is the possibility of a knife edge without mixing by optimization of a side product. 
It aims at the performance which can also do a knife edge loop according to an arm. 

And be easy to make me, a beginner, into Hovering 
The tail was lengthened considerably. 



Drawing 

Wings type 


Full length                :900mm 
Full                          :800mm 
The main wings area : 18dm2 
All Weight.             : About 280g 
A load on wings      :About 15 g/dm2 

Airfoil                            : Original symmetrical wings 
Body quality of the material : EPP 
The main wings structure   : EPP 
Tail structure                     : EPP 

Motor                  :PJS550E 
Controller          : Castle Creations PHOENIX 10 
Propeller           : APC-SF 10X4.7 
Battery                : E-Tec Lithium Polymer ET -1200x3 

Cost of materials      : About 4000 yen grade. 



The smaller Nichrome line cutter was made to accessories logging. 
A battery is Ni-cad 4 cell for receivers. 

The cypress stick was made the guide, EPP was sliced thinly, and board material (4mm and 3mm) was started. 



Manufacture of the main wings 


The paper pattern was made by plastic van and the rib was cut down from 3mm thick EPP. 


The board for Planck is also 3mm thick EPP. Ruler was put and bent and the peculiarity is attached. 


Spa is also 3mm thick EPP. 
Each GP clearance of the Konishi bond It comes out and pastes up. 


The aluminum angle was used and it acted at a stretch as Planck of the upper surface. 
Since it is a soft material, mind is used very well so that it may not be distorted. 


Pie was closed like a Chinese meat dumpling and pasted up. 


1mm carbon rod was embedded at the upper and lower sides for the central part, and all circumferences were reinforced on the glass tape. 
The weight of wings is only 25.4g. 
Don't you stick a film, either and can do so lightly that it is not believed that it is this method? 



Manufacture of the body 


4mm thick EPP is cut as the drawing which carried out the expansion copy. 
Reinforcement is stood to a part for the central part by 4mm thick EPP. 


Linkage for horizontal stabilizers is carried out. 
Servo  was pasted up by the double-sided tape and GP clearance. 
The phon attached to the shaft processes the phon for Servo . 


It is for motor mount to an EPP block. 
While turning  pushing and a hole are made for the carbon pipe of 10mm of diameters of inner. 


Wings were inserted in the body and right and left were pasted up. 


The Servo code for an elevator and rudders extends. 
Aileron servo made the hole in the main wings undersurface, and pasted it. 


The upper and lower sides are closed by GP clearance, taking care so that the body may not be distorted. 


A canopy portion is not pasted up. 
The piece of Velcro was cut down thinly and stuck on the canopy portion. 


The battery exchange method which reverses the common sense of an EPP no one but! 
Piece of Velcro  and a piece of Velcro are removed and an inside is accessed. 


Triangular material was pasted up on the nose of an airplane. 


A motor is inserted in the carbon pipe of a nose of an airplane. 
It attaches by point attachment of a tie lap and Super-X. 



ERURON hinge 

The thing which put a part of adhesion side of a glass tape together is prepared. 
It decided to stick alternately and to make it an Aileron hinge. 


It starts by 6mm thick EPP, and Aileron is the sake of twist prevention. 
Spray paste is played and the film is stuck. 


A little Angle of the body was rounded. The place seen from the undersurface. 



Manufacture of a horizontal stabilizer 

A horizontal stabilizer is also the rib group structure of 3mm thick EPP. It combines by GP clearance. 
The hole is made so that a carbon pipe may enter. 




Aileron servo  is under wings. 


Two servo is buried with the tail. 
The phon for rudders is what was made from the video case at the time of No. 1. 
The axle hole of a horizontal stabilizer is the clear file bought at the shop. [ of 100 yen ] 
It starts and makes from a cover. 


A horizontal stabilizer is inserted in a pipe and it pastes up. Adhesives are Supermarkets X. 
The glass tape is stuck on four corners for reinforcement of the body. 



Manufacture of a leg 


The carbon rod is thrust into legs at the body. 
Adhesives are Supermarkets X. 


Piano wire is connected with thread at the tip of a rod, and a wheel is attached. 
EPP of the portion which has attached the leg does not split -- as 
The character of ‚­ was reinforced combining the glass tape. 
Moreover, even when it thrust in from the front, the tension line was attached so that a carbon rod might not break. 


Tail Skid attaches 1mm carbon rod on a glass tape. 



Completion! 

Urethane was blown lightly and painted. 
The increase in weight by paint is about 3g. 


It became a quite large-patterned body. If only size is seen, is it the same level as 540 classes? 
But it is overly as lightweight as 280g at a battery lump. 


It is such if an inside is opened. 


The sticker was made with the personal computer. 


The maximum angle of a rudder  45 degrees or more. 


It seems to be more in good condition for PJS550 motor to reduce a rotation angle.
The place which reduced and adjusted iŠp of a motor by setup of a phoenix controller, 
Current when balancing with prudence, What and 3A
Although it thinks that lightweight-ization of the body is also effective, they will be what and an efficient motor. 
I have already been moved to tears... (ToT ) - flown early -- it is -- ! 



NEW! 
Flight in PURESSHON 

Are surprised first at the moment of flying, 
They are lightweight-izing of the body, and a sharp response by the high power motor. 
A top [ throttle / half ] hardly uses even the time of hovering. 

Since it can escape to the sky immediately even if it is practicing and a posture collapses 
feeling easy -- a low altitude -- hovering -- it can practice -- having come . 

However, lightweight-ization is not a good language loan. 
It is hard to give the too light cause and cobra. 
He has a feeling that the range of hovering is very narrow to level flight. 

Moreover, performance using inertia is difficult for
the extremely light airplane of a load on wings. 
But this is unavoidable ... (^_^;) 

It is the body which is very easy to do a knife edge. 
Does it seem that an upper side product is large since it turns only at a few to a rise side? 
I think that it will cut later and will adjust. 

Even if it falls, it is a stake breaking very much, and it is sushi. 
Even if it repeats hovering, a 20-minute or more flight with one battery is possible. 
Is it the optimal body for a fan fly beginner? 

If Economy flight , probably it will be earnest, and is flying 30 minutes or more easy? o(^-^)o 


Further improvement 


I improved effectiveness of a rudder. 
The angle of a rudder was increased and the counter portion was attached. 


Since the leg of carbon broke when it fell, piano wire was constructed and remade. 
It sticks on the body on a glass tape. 


Since he wanted to use APC-SF Pella more efficient than chip box Pella 
Propeller SEBA is made himself by the adapter of QRP. It carried out. 


Since it turns out that a motor takes and •t slackens on a tie lap 
It was made for a hose band to fasten firmly. 


A board is cut down from the tray made from polypropylene for reinforcement of a mount portion. 
It stopped on the glass tape. (Adhesion is nothing.) Only tape. 


It did not paste up but the body and the carbon pipe are hooked on the glass tape. 
It is "the theory which ‚¯ the thing which has not been pasted up and does not separate." . (Smile) 
However it may fall, it does not break probably. 


SouthernX2 for simulators 


The body for FMS is here. SouthernX2.zip 73kb 



* Movie
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 http://www.youtube.com/watch?v=cXg58BCYBfo
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I introduced this model by R-C Groups. 
Part 1 http://www.rcgroups.com/forums/showthread.php?s=&threadid=167906

About sale of a kit 
About the U.S. version of SouthernX-2, it is Mr. Mark Roberts's place. 
He can buy it as a garage kit. 
It is said that the price of about 30 dollars is + mailing cost. 
His homepage is here. 
http://www.funplanes.com/

 

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