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Eli F3-RES 2m

Product Code: ELI
 (2 reviews)

Price: $210.99

4 in stock
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The Eli F3-RES is a very beautiful high performance F3-RES model from Eastern Europe. With attractive elliptical flying surfaces (hence the name) and a very long tailboom it flies as well as it looks. The Eli model won all three Slovak competitions in F3-RES in Slovakia in 2020. It was 4th place in Austrian F3-RES nationals and won E-RES once. Eli is made from very accurately CNC and laser cut balsa with lightweight wound tubular carbon booms for the main spar and tailboom, giving excellent strength and light weight.

The Eli F3-RES design philosophy, as stated by the manufacturer is "This model is made for more dynamic flying which you know from F3J and F5J, it is not for standing in the wind. Whole conception is adapted to this fact. There are tubes for ballast about 100 g in the wing."

The balsa and ply parts are cleanly laser and CNC cut. The fuselage consists of a wooden (plywood/balsa) pod and a light weight tapered carbon tailboom with a balsa tailplane mount. The fin is fixed to the tailboom and the tailplane is removable. Both the fin and the tailplane are cut from a high quality lightweight balsa. The wing is connected to the fuselage using a through joiner. This makes for fast and easy assembly at the field as the wing is retained by magnets - there is nothing to screw. The wing main spar is a tapered carbon tube, which provides excellent strength and very light weight. Riblets ensure the covering material follows the airfoil contour accurately. There are two large spoilers for safely exiting thermals and precise landings.

The Eli can be built fast and accurately without any complications. The kit contents include all the necessary parts to build this sophisticated model easily, including pre-bent leading edge parts and a wing rib alignment jig. The well selected balsa and ply parts are cleanly laser cut and the wound carbon spars are light and well made, with the tip spars tapered. All the control parts and small accessories are included. The kit comes with parts to allow the model to be built as a pure glider or an electric glider. However the internal width is only about 23mm at the nose so installing an outrunner will be a squeeze.

The kit includes a professional quality full size plan with isometric views and a beautifully illustrated English build manual. Also see this excellent photo build log as an additional construction guide.

This is one of the nicest F3-RES kits we have seen and is highly recommended.

(C) 2021 Neil Stainton

Eli F3-RES Specifications
Wing span 2.0 m 78 in
Wing area 34.7 dm2 538 sq in
Length 120 cm 47.4 in
Flying weight from 420 g 14.8 oz
Wing loading 12.1 g/dm2 4.0 oz/sq ft
Aspect ratio 11.3
Wing airfoil AG24 modified
Dihedral (EDA) 12.0º
Spinner Diameter 30 mm
Centre of Gravity 75-78 mm from wing leading edge
Controls Rudder, elevator, spoilers

Eli F3-RES Typical Weights
Bare structure 290 g 10.2 oz
Covering 50 g 1.8 oz
Total structure 340 g 12.0 oz
Receiver 6 g 0.2 oz
Rudder servo 5 g 0.2 oz
Elevator servo 5 g 0.2 oz
Spoiler servos (2) 10 g 0.4 oz
Battery 54 g 1.9 oz
Flying weight 420 g 14.8 oz

Recommended RC
Rudder & elevator servos Blue Bird BMS-101DMG, Blue Bird BMS-101HV, KST X06
Spoiler servos Blue Bird BMS-101DMG, Blue Bird BMS-101HV, KST X06
Receiver 4 or 5 channel receiver to match your transmitter
Battery Radient 1S 700 mAh LiPo, Dream-Flight 300 mAh 4.8V NiMH, HyperFlight 650 mAh 4.8V NiMH, Dream-Flight 700 mAh 4.8V NiMH, 1S 2600 mAh Li-Ion, 2S 300-600mAh LiPo

Control Throws
Rudder 17 mm each way
Elevator 12 mm up & down
Spoilers 80º up
Spoiler mix 3 mm up elevator with 45º up spoiler

Electric Powertrain Recommendations
Hacker A10-7L geared 4.4:1 3S 450mAh LiPo, 12x8, 13x8 folding prop
DYS D2225-19 2S 450mAh LiPo, 10x5 folding prop
DYS D2225-19 3S 450mAh LiPo, 7x3.5 folding prop
ADH300L / MM1914-1100 Front Mount 2S 450mAh LiPo, 11x6 folding prop
ADH300L / MM1914-1100 Front Mount 3S 450mAh LiPo, 9x5 folding prop

Reviews 2  

 Review by:

Amazing Order Turnaround

Ordered late afternoon and delivered just over 24 hours later. I've looked longingly at the plan and the kit components but am not yet ready to start building. The quality of the balsa and the part-cutting is very impressive. The English translation of the build instructions is a little challenging but I think I've worked it all out. "Controll turning of the wing, on tip-1 negative 1-2mm ......" was particularly challenging but I'm assuming that it really does mean washout.
Hyperflight have a fabulous selection of kits and their response to customer orders is second-to-none. I know that obtaining balsa kits from Europe is very difficult at the moment and I hope that will be resolved because I look forward to building more of these.

HyperFlight comment: Yes it means washout.

 Review by:

Beautiful Kit

Beautiful kit, cutting and wood. First class, fast delivery and very well packaged. A1.
A pleasure to build. Thank you HyperFlight.

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