Introduction F5J from Grüner CNC

Details

The INTRODUCTION F5J, our first model for the still young competition class F5J, has inherited excellent genes! Of course it is a plane for all kind of pilots: for those, who love long flights in the thermals as well as for those, who love to have relaxing flights, for the "come-without-charger-to-the-model-flying-site"-pilots as well as for the "I-won't-charge-between-the-flights"-pilots. Inspired by our world-famous Libelle A380, we created our new Introduction F5J by resolving the one and only serious problem the A 380 had: No airbrakes to escape thermal lifts.

As usual we used stable tubular carbon spars, precisely lasercut wood parts, a very simple construction (Hoellein-3D-puzzle), easy and forgiving take off-, flight- and landing characteristics, large speed range due to the modified AG35 section, ecxellent handling and thermal characteristics. Easy purchase of single spare parts and assemblies. Made in Germany!

New: 2860mm wingspan, 920g flying weight, three-part wing with multiple dihedral and attached wingtips, lightweight rudder and elevator constructed in a solid interlocking framework, removable elevator (optional) mounted in front of the rudder, 90° deflectable landing flaps enabling you flying vertical descents, integrated wing connectors in the main spar, innovative (tool- and tape-free) fixation of the outer wings. Vertical descents with deflected landing flaps (90°) and landings avoiding the vortex zone on steep slopes are now possible without any problems.

The recommended drive - containing the BL-outrunner Hacker A20-22L Evo, a 3-cell LiPo with a capacity of 1300mAh and the CamCarbon 11x6 prop - allows a many many climbs to thermal country. Due to the light weight, a motor run time of 5 to 10 seconds per climb is sufficient.


The kit:
Main feature of the model is the tubular carbon spar, onto which the lasercut ribs are kind of "threaded". Stylish wingtips ensure an elegant appearance. Our Introduction F5J has the most beautiful and elegant fuselage of all of our Gruener kits so far and it is consistently designed for the use of small brushless outrunners. The flying weight starts at 920g. Considering a wing with nearly 3 meters wingspan and a wing area of 65dm² (wing loading approx. 14g/dm²) you might imagine the thermal abilities of this design. Due to the long fuselage and the multiple dihedral in combination with the wingtips, the INTRODUCTION F5J has excellent flight characteristics.

The fuselage made of balsa is reinforced with light plywood in the front section. A precisely shaped milled part is already prepared to fix the motor Hacker A20-22L Evo. The kit contains, besides of the lasercut parts, CRP-spars, GRP-leading edges, all the small parts and linkages needed to complete the model. All the kits of the Gruener-CNC-line include a multicolored construction plan scaled 1:1 and a fully illustrated German construction manual. 

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We cannot guarantee that the shops listed below do sell the Introduction F5J in particular but at least we know they do distribute Grüner CNC.

Where to buy

Germany
Höllein
check web site
Ship to: Europe
United Kingdom
Hyperflight
check web site
Ship to: Europe

Wingspan: 2860mm (112.6 in)
Length: 1430mm (56.3 in)

Weight: 920 g (2 lbs)
Wing span 2860 mm 113 in
Wing area 65.0 dm² 1008 sq in
Length inc spinner 1430 mm 56.4 in
Flying weight from 920 g 32.5 oz
Wing loading 14.2 g/dm 4.6 oz/sq ft
Aspect ratio 12.6
Wing airfoil AG35
EDA (dihedral) 12.0º
Spinner Diameter 38 mm
Centre of Gravity 87-90 mm from wing leading edge

 

Recommended power drive:

  • Hacker A20 -22L Evo (premium suggestion) or Robbe Roxxy 2834/12 (standard, in this case the center hub 35.3,2.8 is obligatory) 
  • Flight controller Hacker X-20 pro with integated BEC
  • 3S LiPo battery (from 850mAh, recommendation: 3S/1300mAh) 
  • RE-spinner cone 35mm on center hub 35-3.0-8 (only for the Hacker-motor)
  • Aeronaut-folding prop CAM Carbon 11x6

Recommended RC-equipment:

  • Transmitter with at least 4 functions
  • Receiver with normal range
  • 3 x extension cable 100mm 
  • 4 x servo Graupner DES 427BB or similar

Variants

791
Introduction F5J ()
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