ARIS in English

ARIS F3F/F3B

Airfoil	Items	ARIS/F3B	ARIS F3F
	Wing span	2970mm
	Profile	HN483B
	Wing area	58.4dm2
	Wing load	38.5g/dm2
	Structure	Carbon-Balsa-Glass	Reinforced
	Portability	2 pieces wing

Tail plane	Profile	HN470S
	Wing area	6.14dm2

etc.	Flying weight	2250g-4000g
	Radio gear	6 servo
	Length	1425mm

ARIS is one of highest quality F3B/F3F fighter designed and developed by Aerodesign in Slovakia. It is the Slovakia where Jaro Muller firm locates providing EUROMODEL with excellent F3B/F3F/F3J ships. The quality of ARIS does not is almost the same as that of Jaro Muller or more. The models made by Jaro Muller is expensive because it is sold in Germany. ARIS is able to be purchased directly from its manufacturer, Aerodesign in Slovakia. Therefore, it would be one of cost effective models that is recommended by this reason. In addition to the quality, the fuselage of ARIS is honey comb architecture which make its fuselage so stiff. The nose of ARIS is made of carbon frame and nose cone. As a whole, its fuselage is so stiff that there could not be found. The ailerons and flaps are made separately from the aerofoil, and have shell architecture by themselves. As a result, any deflection of aileron and flap will be happen by this architecture. Aileron and flap is coupled by the TETSA strong hinge tape. Though the looks is not good, the aerofoil is molded with tape line so that its surface is stepped down with thickness of tape precisely. This disadvantage is compensated by the stiffness, less flattering and the weight of aileron and flaps. There is two type of ARIS F3B and F3F. Both have the same dimension. Only structure and material are different. ARIS F3B is stronger and lighter than ARIS F3F. So the ARIS F3B is more expensive than F3F model.

Designer/Manufacturer

Aerodesign(Slovakia)

Plan:

Price/Dealer

Price ： Ask Aerodesign Co.

Gallery


stable level flight	Sharp and quick turn.	Ready for diving

Dihedral is 3 degrees so it is almost flat.	ARIS is a model of balance.	Climbing after diving

Jackknife	smoothly turn. ARIS has a good performance at turning	Beau geste.

A photo of ARIS take by Mr. Kevin Newton.	Honey comb sandwich structure(1/2)	Honey comb sandwich structure(2/2)

Linkage rosds for V-tail	Linkage cover of fuselage	Carbon blade for radio gear and Carbon joiner that has unique H-shaped structure. Carbon material contributes to this ligher and stronger fighter.

High precision nosecone that is connected with the fuselage tightly.	Ballast inlet. A wood spacer close this inlet and fix those ballasts into the ballast tube. The belt looks a golden ring. It is made of Kevler fiber actually, but looks very luxury.	The totall weight of additional ballast amounts to 1.75kg as a whole.

The installation of radio gear is a sort of artistic work. In addion, carbon blade make the maintenace easier. The balance weight at the top of blade is not factory option but must be made by your self. However it is not difficult to make it.	The wooden spacer is fixed by a screw to avoid from going away. The opposite side of screw has been bent for easy to handle. (see left picture)	The right and left connecters for cables of servos at both sides are placed at different positions avoiding connectors would not collide.

The anntena cable is extended and be hanged down from the tail as an antenna. There is an another way to make antenna. Connecting a carbon rod insered in the v-tail with this yellow cable coming from receiver. Then the carbon rod will be an antenna.	The number of carbon joiners for v-tail is two, not three. The center joiner goes to the opposite side as shown in the left picture.	F3B model equippes the hook.

The shape of fuselage is almost straight beam that has an advantage for "Jackknife" maneuver .	V-tail is two pieces and removable.	The control lever of V-tail has a square shaped cross section that is stiff and enable to control V-tail precisely.

The color is bassicall white. It is the same white as the high quality color of Jaro Muller.	The colors other than white are of course available. all are low profile.	When air brake is used and the flap will be placed down, a gap would appear in case of some model. As for ARIS, there will not be any gap as shown in above picture. The flap is molded by it self with gap cover.

Comments

Wing:

１)Aerofoil profile

HN483 is for main plane and HN470S is for tail plane. This combination of wing profile is the same as NYX-FURIO produced by BRETA Model. This aerofoil profile is marverous profile, since it does not always require no camber diplacement. The camber is slightly up in the high speed mode and it is slightly down in the thermal mode. This technique is in common flight for those models with flaps. However, you need not change camber when you fry ARIS. If you want to make ARIS speed mode, then you need onky to place elevator down, and ARIS would start diving and icrease its speed. If you want to make ARIS thermal mode, the you need only to make it in the level flight and fly slowly, even if you do not make camber down a little. Even if the camber is not changed for such three model as Task A, B & C, the pilot can make ARIS be those three modes. Easier control make the pilot be freer. Thus the pilot can make seemless control of flight of ARIS. In other words, the exessive control of the saleplanes will lose their height in usual. The error willl be also prevented because of less controls. The ultimate sailplane is the one can fly without any human control. In practice, the camber is made be down(positive) in the thermal mode, However, the neutral position of flap & aileron would be the fastest while diving from the high place.

The structure of early ARIS and Elita of the Euromodel in Germany was carbon honeycomb structure such as Estrella by Fischer. Because the wing structure of Elita was just like a corrugated paper, the lines along with honycomb contact surafce appeared on the wing surface as the time had gone by. Consequently, the structure of them except Estrella returned to be as it was. However the manufacturer told that it did not return but was reinforced.

Wing cross section of early ARIS	Wing cross section of early Elita
The hull is AFK / GfK technology, which is in addition to competiton versions ultra-high modulus rovings stiffened. This is an extremely solid hull, with very close contact theoretically possible. The wings: Double wing in a new, patented carbon technology. With this technique is a much better torsion achieved than with the well-known sandwich technique. In addition, a much higher surface hardness achieved. Rectangular wing connectors from 15 x 20mm carbon prepregs.		Wing cross section of Estrella

2)Structure

ARIS is designed as a F3B/F3F model primarily. The technical design specification of ARIS on the stability are the medium value within the ranges required for F3B/F3F models. They are relavant from the view point of aeronoutical dymanics. In order to achieve the required wing load for F3B models, the only balsa satifying 80 grams per squre centimeters (80g/cms)　is selected for the whole wing surface of F3B models. As for F3F models, a little heavier material is used. Rohacell is recently used for the many models. But it is reported that the really good balsa is lighter and stronger than Rohacell. The goal of the design is to concentrate the mass of the model arround the center of gravity without losing stiffness. The latest ARIS is very close to this goal. The improvement in 2008, the reinforcement and less weight of main spars, flaps and ailerons.

3) Flaps and Ailerons
Flaps and Ailerons are fabricated separated from mainplane. Each flap or each aileron are shell structure by itself whch is different other models that made using skin hinge technology. Therefore airlon and flap are not basically warped by the structual nature. The flaps and ailerons are connected with main plane using adhesive hinge tape. This tape is also used by Euromodel and is heat-proof can be used a couple years under such condition as without the extreme temperature difference. Unfortunately it is reported that this tape is sometimes damaged in the thermoplastic manner under the strong sunlight in Japasenese summer, where the tempereature reaches to 40-50 degrees Celsius. It can be improved by the moder material such as polyimide resin tape, so-called Polyimide film tape, Kapton.
Sometimes the displacement at the aileron outer edge, or flap at the root can be observed in case of the aerofoil using skin-hinge technology. ARIS can not have such displacement caused by distortion of the moving wing such as ailerons or flaps because of its wing structure.

4)Servo
The high torque mini servo less than 13mm thick such as JR DS362 can be used as the flap servo. The wing servo such as JRDS161 will be the best for the aileron servo. The normal mini-servo can be used for V-tail (ruddervators). If you want have quick response, the servo for the RC-car will be better.

Fuselage:

１）Fuselage structure
The fuselage of ARIS is very unique structure as above pictures show It is called as the Honey Comb sandwitch structure. It is really strong. Once it would be crashed, it is hard to repair it.

2)V-tail
The V-tail of ARIS is consists of two pieces. The latest version is 10grams lighter than the older model. The v-tail pieces can be removable for transportation. The V-tail is connected to the fuselage using two carbon joiners at each side. Someone says three joiners are required for suppressing vibration of V-tail at the high speed range. It will be a point to be improved.

Flight:

The flight shown above pictures were taken on the slope in Japan. The acceleration in diving is very comfortable. The flight of ARIS is two rank higher than the conventional models. It is just like beauty ARIS is flying.