The Victor, the latest F3x model of Lubos Pazderka
by Laurent Gauthié
The Victor is the latest F3x model of Lubos Pazderka, www.F3j.cz, also the manufacturer of the Eraser (F3J/F3B) or the Fazer. His shop is in Czech republic. The Victor exist in X-tail and V-tail version.The victor is a 3.19m glider, around 67dm˛ for 2.3Kg in the F3B version. Spar is UHM carbon with vertical balsa/glass between the 2 flanges and the skin is a typical sandwich carbon/herex/glass. Double carbon skin is available. Behind the wing joiner box is a ballast tube, one in each wing, Diam13mm and 270mm long.The wing joiner has a very good section and is quite long. It seems to be rigid.The fuselage is glass/carbon-Kevlar made, one piece moulded, with a canopy. It is quite large and standard equipment could probably be used. 15mm servos and long handle have space enough. In the nose, a big battery can be used too. Carbon push/pull rods (diam4mm) are already installed, crossing a balsa/glass frame 5cm behind the wing trailing edge. The hook is adjustable.The V-tail is in one part, made of glass/balsa/glass sandwich with carbon reinforcements. It is connected to fuselage by 2 screws, crossing the fuselage. Commands are installed.All parts are good quality moulded. The wing in F3B version (carbon/herex/glass-UHM spar) is very stiff. Each wing weight is 620gr without equipment. That’s good compared to the surface. Fuselage is stiff too.
The kit is very complete :
So your job is quite reduced to the minimum. 13mm servo is really the maximum size for the aileron. My DS3068 touch the servo door when it is closed. Be careful to place this servo closed to the spar… So my equipment is 4 DS3068 for wing, 2 micro speed digi for v-tail and schulze alpha 8.40 receiver. My battery is a 4cells 2500NiMh.In this layout, I need around 130gr of lead in the nose. The wing section is the AH106, profile developed by Andreas Herrig, who is currently testing the model. The profile is very thin.
The launch: The victor creates a lot of tension in the cable. Rudder and ailerons in split mode are very efficient. The wing stiffness allows a good zoom.
Task A, duration: the Victor is very tolerant and I test CG position from 101mm to 111mm. In this range, the model is still “gentle”. Now, I fly with CG at 106mm that gives good feelings in duration and allows some faults in spirals for examples.
Task B, distance: the flights are dead straight, so this task wouldn’t be a problem. V-Tail is really efficient for quick turns and the large span doesn’t seem to be a problem. Combi aileron->rudder is good assistance.
For ballast up to 440gr, le CG will be a little bit forward and if you use the ballast tube Diameter 13mm, so for up to 600gr, the CG will move rearward. Theses modifications of CG are minimal and don’t affect the model behaviour.
Task C, speed: accelerations are very good with straight trajectories. Snap-flap can be used with around 6mm for flap. In this layout, my CG is 108mm with 970gr of ballast. I did my own ballast bar Diameter 13mm with a steel tube full of lead. That gives a ballast of 375gr instead of 300gr per bar and so a CG a little bit more rearward.
Landing: The butterfly are very good: My flaps come down to 80° and the model slow down quickly. It needs a lot of elevator compensation. You can cancel the aileron differential when you use butterfly to keep handiness.
Compared to my other models :
Trajectories are straight with both models.
Positive points :
Negative points :
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