Product details
PLUS is the F5J without any compromises.
PLUS is a newest 2017 unique project of Joe Wurts + Vladimir’s Model expressly for F5J competition.
Airfoils and wing planform was optimized according to Reynolds numbers for best thermaling and best wind penetration of ultralight model.
Joe’s Wurts airfoils allow you to use flaps in a wide range from -2 to +7 degrees for achievement maximum climb performance in thermals and minimized decline rate in float condition or speedy upwind flight.
The absence of the propeller in the nose is the main PLUS advantage. It is greatly reduces the overall drag of the model and not only improves the wind penetration, but also improves climbing in the thermals. Probably, all the pilots noticed a significant deterioration in the flight characteristics of the electric plane in comparison with the glider (without a propeller in the nose).
Unique fittings of tail boom to wing and to stabilizer provide not only light weight and high strength, but also the simplicity of the airframe assembly. PLUS has only two screws for fixing wing to the pod.
The great advantage of opposite V-tail is right direction of rudder moment reaction. There for PLUS rudder is more efficient. PLUS stabilizers are easy fix to the tail boom and between each other by adhesive tape. Very light pool/spring elevator control system is very light and enough rigid.
PLUS F5J has very unique advantages:
+ the best thermaling performance;
+ unique wind penetration performance;
+ low drag without prop spinner and blades in the nose;
+ right direction of rudder moment reaction of opposite V-tail;
+ very easy handling;
+ ultralight weight;
+ compact size for transportation.
NT model weight*
760 gr (26,8 oz)
Flight weight**
1070 gr (37,7 oz)
Wing loading
14.96 grdm²