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Inside-F5J 2.9m

Product Code: INSIDEF5J
 (6 reviews)

Price: $207.10

More than 10 in stock


The Inside F5J is a lovely built up laser cut balsa, ply, and carbon kit for competitive F5J flying without breaking the bank. The Inside F5J has been developed from the Introduction F5J with the major changes being improved structure giving a lower weight, six servo wings with outer ailerons, inner ailerons, and flaps and reduced dihedral to give more precise control in windier flying conditions. The reason for the three control surfaces in each wing half is to keep each control surface structure reasonably short so that it does not deform and twist under load, even when using all balsa construction

The Inside F5J is extremely good-natured in climb, in thermals and when landing. It has a good speed range through the use of the AG35mod profile with outstanding cruise and thermal characteristics. Its good control response allows accurate positioning in a thermal and allows the thermal to be tracked easily as it drifts downwind, giving great climbs. The fully articulated wing allows the camber to be decreased when increased speed is required when returning to the field from far downwind.

The 2866 mm (113 in) easy build wing with full camber control and a flying weight from 1100 g makes the Inside-F5J an ideal model for an aeromodeller looking for a high performance F5J plane without breaking the bank. The recommended Hacker A20-22 brushless motor, a 3-cell LiPo with 900mAh - 1300mAh capacity and an Aeronaut CamCarbon 11x6 prop gives many climbs to thermal altitudes. Due to the low flying weight 5s -10s motor runs per climb are usually sufficient.

The central design feature of the wings is the carbon fiber tube, onto which the laser-cut ribs are threaded. Stylish wingtips ensure an elegant surface finish. The balsa fuselage is reinforced in the front area with light plywood. A milled firewall is already prepared for the Hacker A20-22L evo. Apart from the laser-cut components, the kit also includes CFRP spars, GRP nose strips, as well as control rods and small parts. An excellent full scale full colour plan and a richly illustrated German construction manual is supplied. An English translation is here.

Not included in the kit are adhesives, covering material, powertrain and RC components. For covering the model we recommend Oracover Light film. Lots more info in this Inside F5J RCGroups thread. Thanks to Lauri Maalismaa and RCGroups members for use of the photos.

Inside F5J Specifications
Wing span 2.9 m 113 in
Wing area 65.0 dm2 1008 sq in
Length inc spinner 143 cm 56.4 in
Flying weight from 1100 g 38.8 oz
Wing loading 16.9 g/dm 5.5 oz/sq ft
Aspect ratio 12.6
Wing airfoil AG35 Mod
EDA (dihedral) 6.6º
Spinner Diameter 35 mm
Centre of Gravity 87-90 mm from wing leading edge
Controls Rudder, elevator, outer ailerons,inner ailerons, flaps, throttle

Inside F5J Typical Weights
Structure 790 g 27.9 oz
Wiring 25 g 0.9 oz
Receiver 10 g 0.4 oz
Rudder servo 11 g 0.4 oz
Elevator servo 11 g 0.4 oz
Wing servos (6) 60 g 2.1 oz
Speed control 30 g 1.1 oz
Motor 43 g 1.5 oz
Prop & spinner 20 g 0.7 oz
Battery 100 g 3.5 oz
Flying weight 1100 g 38.8 oz

Recommended RC
Rudder & Elevator KST X08, MKS DS6100, MKS HV6100, Blue Bird BMS-105, Graupner DES 427BB
Outer ailerons Ripmax SD100, KST X08, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-101AMG, Blue Bird BMS-101DMG, Blue Bird BMS-101HV, Blue Bird BMS-105, Corona DS843MG, Hyperion DS09-SCD, Graupner DES 427BB
Inner ailerons MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-105, Corona DS843MG, Hyperion DS09-SCD, Graupner DES 427BB
Flaps MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-105, Corona DS843MG, Hyperion DS09-AMD, Graupner DES 427BB
Receiver 9+ channel rx to match your transmitter
Power 30A - 40A ESC with 4A - 5A uBEC

Powertrain Recommendations
Hacker A20-22L 11x6 prop 3S 900mAh LiPo
Hacker A20-20L 10x7 prop 3S 900mAh LiPo (21A, 1950 fpm)
Dualsky XM2826EA-10 45g outrunner 2S 900mAh LiPo, 10x7 prop
Turnigy C2826-1350 9x4.5 prop, 3S 900mAh LiPo (8.3 m/s, 1660 fpm, 23A)
Mega 16/15/4 direct drive 2S 900mAh LiPo, 10x5 prop
Mega 16/15/5 direct drive 7x5 folding prop, 3S 900mAh LiPo (8.2 m/s, 1640 fpm, 29A)

Reviews 6  

 Review by:

Inside-F5J 2.9m KIT

I am very satisfied - fast delivery, high quality kit. I'm sure the model will fly great. I Immediately started assembling. :)

 Review by:

Inside-F5J 2.9m

I am so pleased with my Inside F5J. It is really cheap and flies superbly. Running 6 servos independently in the wing and only a 3s 1300mAh battery. I regularly get >30 minute flights from flat field. 40 minutes the other day and had to force her out the thermal. Everyone at the field likes this model and have been around gliders for years. Very pleased and well worth the money and building effort. Would buy again.

 Review by:

Insider F5J

The Inside F5J is a great kit to build and for the most part is user friendly. All parts are well labeled, laser cut and fit together like a watch. Having built two of them I can say that the only difficulty I had was trying to keep the long fuselage straight and true while building. It is very difficult to get it rite the first time and you don't get a second try. Be sure you build over the plans and pin down as you go. I found it easer to sheet the top of the fuse first while having pinned the bottom to the plans.

 Review by:

Inside F5 J

The Inside is a beautifully manufactured kit. All parts are excellently laser cut and the balsa is also excellent, and so are the plans and instructions.
Will start building soon and look forward to an easy and straight forward building process.

 Review by:

Ordered this from Neil and it was shipped the next day. Very good service. I am still building the kit, so I can only comment on the box contents. Wood selection is good. Laser cutting is excellent. Parts fit is excellent. I am using the English version of the instructions and it has been very clear. Lots of photos help, too.
I would recommend this kit as an excellent build project and considering the comments posted on RC Groups, it should fly well.
Overall, two thumbs up! or five stars, or whatever.

 Review by:

Popular Inside F5J

The kit is easy to assemble and every part fits very precise. Not completed yet but it builds fast. Just download the English manual and there are loads of info on the web on this model.

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