NYX /F3B/F3F/F3J | ||||||||||||||||||||||||||||||||||
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- The NYX is a new
molded F3F, F3B, F3J model that should be in production, and in the air,
before the end of the year 2001. These days it can seem as if there are
new mauled models everywhere, but this isn't strictly true. What there
is, is choice, (Mr. Miyakawa's Comments on 13 January 13, 2002) NYX has been imported to Japan 29 Dec. 2001, which was the first model that imported to Japan. We asked Mr. Miyakawa to evaluate NYX, who is a excellent F3B competition flier. We could see its maiden flight on 13 January 2002. His first impression on the kit is that the quality or completeness of NYX was more than his expectation. The stiffness of nose is stiff enough comparing with nose corn type fuselage, which enable us to stab at the ground when targeting the landing point precisely. The characteristics of trendy F3B model is the thin and super stiff airfoil such as that of Estrella and Champion A-model. The profile HN354SR is quite similar to the SA series profile adopted by Breta-model so far, and is very thin. Here we can have his report about maiden flight at the bottom of this page by Mr. Miyakawa including comments on the stiffness in the direction of spar of airfoil. The best time of his maiden flight was 16sec for Task C. (He pointed out that airfoil was much warped or deflected while launching in strong against wind and turning quickly in TaskC. However, Breta model treated his comment with quite sincere manner and quickly agreed to make airfoil stiffer. The reinforced airfoil will be provide very soon, from the first quarter of 2002. ) C-tail is very skinny surface rudder and stabilizer, is almost transparent as shown in the following photo. The fuselage is very robust, because it has thick orifice at the root of C-tail. The tortional rigidity seems to be enough to prevent C-tail from twisting at launching and Task C. The most grateful thing is that all wiring has been installed including 9 pin connector at the airfoil and fuselage as shown in the photo. See the following comment as for its detail. |
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There are more comments on NYX | ||||
Wing | ||||
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Fuselage | ||||
Sophisticated, modern fuselage moulding techniques make cruciform/ T-tails a much more easier prospect than the bad old days of fuselage with a large ugly bandage of glass fibre reinforcement wrapped around them, right where they always break on landing. V-tails were an easy answer to that problem, but they simply don't fly as nice as a good cruciform or T-tail. The Ballasting option is likely to be increased for the slope and F3B use. The ballast tube for F3F and F3B is lager than the one for F3J.(Quoted from Quiet Flight International 53 Oct./Nov. 2001) (Mr. Miyakawa's Comment on 29 Dec. 2001) Kit:The fuselage of Charisma by Breta model was very thin skin in order to make it lighter for F3J. The fuselage of NYX is rigid enough for Task C. The most critical issue is the tortional rigidity of the fuselage against the rotation around the fuselage axis, when C-tail is under against the rotational windy pressure. However it seems to be enough. C-tail is light enough in so much that C-tail rudder and stabilizer is transparent plate. The control rod of stabilizer for the full carbon version is a thick carbon rod as shown in the previous photo, which is a key of Task C and give good response at the turn of Task C.Installation: The cockpit seemed wide, but JR1100mA could not be equipped,but 700mA battery layered. Because JR NES4131 was adopted as a standard elevator servo and 250g heavy nose ballast is required, the rudder servo must be a microservo and be stuck beside the receiver. The servo installation on the airfoil was comparatively easy, since many kinds of servo cover were in the kit. However the location of the holes for horns were not precise, adjusting strokes of each servo bother me a little. CG locates 10mm after from the spar end. Hook was in the front of the hole for hook. Total flight weight was 2300g. It took 4-5hours for installation. |
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Flight | ||||
The NYX works! Good pull on launch, great legs, landing is silky smooth. The NYX shows exceptional handling and a wing that is very efficient. I have the D tube version now and I know it will make a great performance TD ship for those that want the extra search capability of the HN section. The model comes pre wired with a auto plug in DB9 and the wires ran to the pre molded servo boxes. The NYX also includes a ballast tube and ballast bar of 17 oz for the TD version, a larger ballast tube will come with the full carbon F3B model.(Written by Tom Copp of F3X.com) (Mr. Miyakawa's Comments about the maiden flight on 13 Jan., 2002.)Launch:The first launch was failed at the height of 20m under the cross wind from 60 degrees right, because the exact neutral could not be obtained due to the first launch. After adjusting trim of elevator, I let NYX land on the ground. The penetration performance seems to be good. The second launch was successful, but the airfoil was warped or crept like Sagitta which was predicted from when touching the airfoil. I released NYX earlier than usual because of protecting the new ship. However the NYX flew high after releasing and got comparatively high elevation. Task A:The thermal duration characteristic is excellent. The NYX responds to small thermal and can circle around by only rudder and elevator such as Xantipa/F3J. The stalling characteristics is superior, it does not stall even if the speed becomes comparatively law. In addition, even if it stalled, the NYX did not fall into spinning. We had 4 flight in the morning. Task C:The wind was blowing at about 5m/sec from 90 degrees right. All ballast attached in the kit was loaded, which amounts to 1kg heavy. Though the airfoil was crept well, but the obtained height was very high because of the strong wind. (Breta Model treated his comment with sincere manner and accepted to make reinforced airfoil. They will provide them from the first quarter of 2002.) The first flight of Task C took 18 sec, because trim was not adjusted and was too much. The second was about 20 sec. The third and fourth were 17 sec. The fifth flight was 16 sec. It was the final and best flight that day. The NYX is well accelerated during speed flight and the momentum of its flight was good, which was such that a big scale ship files straight even in the turbulent and flied through 4 laps. No negative aileron. Snap flap was -5mm. |
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(Updated on Jan.21, 2002)