An excellent F3F racer from designer Mario Perner with an even better price!
How good is she? We have been importing these for a while, and we never had any left to sell online as our local F3F pilots scooped them all up. Several pilots have ordered additional units after flying their first, they want to have backups.
Mario discusses many of his design decisions for the Thor.2 on our forums (here), but here is a quick quote where he is talking about the basic concept and approach used for the Thor.2:
The idea behind THOR.2 is to construct a modern and broadly designed slope soaring model that, on the one hand, gives hobby pilots fun and enjoyment on slopes, but on the other hand is also competitive enough to enable entry into the F3f and F3b competition scene without having to invest €2000-3000 per model. To achieve this, a few things have to be considered during construction. First and foremost, the buildability/statics and thus the choice of materials for the individual components. The well-known competition models from mainly European manufacturers are so expensive because very expensive materials are (have to be) used to achieve the low empty weights while maintaining very high rigidity or strength. Currently, thin airfoils (less than 8% thickness) are often used to achieve this. I also used thin airfoils for the Vrace, the Vantage and the Valkyrie. Regardless of the buildability, in my experience, such thin airfoils often require more attention and time to find a suitable setup. At the risk of generalising, I would say that thicker airfoils tend to be more "user-friendly" than thinner ones. With this in mind, I consider a thickness in the range of 8.0-8.3% for the main airfoil to be a sensible choice.
The situation is a little more relaxed on the outer wing. You still have to keep a close eye on the torsional loading of the wing, but the problem of deflection is decreasing more and more, so the airfoil thickness can decrease towards the outside. So I reduce the thickness on the outer wing to about 7.5%.
The situation is a little more relaxed on the outer wing. You still have to keep a close eye on the torsional loading of the wing, but the problem of deflection is decreasing more and more, so the airfoil thickness can decrease towards the outside. So I reduce the thickness on the outer wing to about 7.5%.
Specs:
- Wingspan: 2848mm
- Length: 1.411mm
- Wing area FAI: 54.22dm2
- Tail area FAI: 5.43dm2
- Aspect ratio: 14.96
- Wing aerofoils: Mario Specials
Accessories included:
- Servo covers
- V-Tail control arm cover
- Small parts and fuselage servo tray
Servo recommendations:
- V-tail: KST X08H
- Aileron: 2x KST HS08
- Flaps: 2x KST HS08
Control Setup:
- CG location: ?
- V-Elevator: ? mm up/down
- V-Rudder: ? mm left/right
- Aileron: ? mm up, ? mm down
- Flaps Landing: ? degrees down
- Flaps Mix: ? mm up, ? mm down
- Butterfly/Landing Flaps: full down, Ailerons ? mm up (Optional)
?mm elevator compensation at full flaps down position
Layup options:
- Normal - Double Carbon
- Feather - Weight reduction for better low lift performance. More details soon.