The
Neutrino F5J is a lightweight 4m electric soarer from JIM Aero. It has excellent performance and can be broken down into small parts for easy transport, making it the perfect competition plane. Despite its F5J focus it is a very practical 4m electric glider with lots of room for easy RC and powertrain installation. The performance is excellent with several completion wins.
The fuselage is beautifully molded from chequerboard spread carbon. The nose section is long and has a large canopy hatch, giving good access to the front, and enabling a straight forward powertrain installation. There is ample room to install the rudder and elevator servos at the rear of the canopy hatch opening, under the wing, or at the front of the dismountable tailboom. A firewall is supplied but not fitted to allow maximum flexibility for motor mounting. Also one of our
32mm CNC aluminium mounts could be used.
The long tailboom is another lightweight chequerboard spread carbon molding that plugs into the fuselage nose section. It has provisions at its front for mounting the rudder and elevator servos. The tailplane is mounted on a short pylon that is bonded to the top of the boom.
The lightweight spread carbon fin slips into premade holes in the tailboom and can also be dismounted for easy transport. The large spread carbon tailplane only weighs 30g. It has a separate elevator for good pitch response and bolts to tail pylon.
The four piece spread carbon over a Rohacel cored wing boasts an excellent finish and has the attractive Neutrino name and logo painted on the top surface, and contrasting colour and white underside stripes. The airfoil section is very thin, and the control surfaces are large and rigid, giving the model an excellent speed range and a low min sink for calm days.
The complete accessory bag contains a firewall, servo mounts, a partially made wiring harness and control linkages.
The very first versions of the Neutrino had a rather short front fuselage which resulted in nose weight being required to obtain the correct the CG. This has now been corrected and the nose has been lengthened (and the tail moment reduced) by about 5 cm which just about solves the issue, so long as the rudder and elevator servos are located in the nose. Alternatively it is possible to locate them in the front of the detachable tailboom to allow the fuselage to be easily disassembled without trim changes. In this format the rudder and elevator servos are behind the CG and an approx 50g heavier powertrain or battery will be required for balance. The supplied pushrods are for aft mounted tail servos. We recommend two
1.3mm Bowden Cables if you intend to use front mounted servos.
There are many threads about the Neutrino on RCGroups, including
AnnouncementUpdateNeutrino build LogAnother reviewA photo assembly guide is
available here.
| Neutrino F5J Specifications |
|---|
| Wing span |
4.0 m |
156 in |
| Wing area |
78.4 dm2 |
1215 sq in |
| Length |
190 cm |
74.8 in |
| Flying weight from |
1300 g |
45.9 oz |
| Wing loading |
16.6 g/dm |
5.4 oz/sq ft |
| Aspect ratio |
19.9 |
| Wing airfoil |
DI8120..820 6.9% to 5.0% |
| Dihedral (EDA) |
8.0º |
| Spinner Diameter |
32 mm |
| Centre of Gravity |
98-108 mm from wing leading edge |
| Controls |
Rudder, elevator, ailerons, flaps, throttle |
| Neutrino F5J Typical Weights |
|---|
| Pod |
109 g |
3.8 oz |
| Boom & tail mount |
40 g |
1.4 oz |
| Wing centre panel |
412 g |
14.5 oz |
| Wing tip panels |
254 g |
9.0 oz |
| Tailplane |
30 g |
1.1 oz |
| Fin |
39 g |
1.4 oz |
| Joiner & Accessories |
85 g |
3.0 oz |
| Total structure |
969 g |
34.2 oz |
| Wiring |
22 g |
0.8 oz |
| Pushrods |
15 g |
0.5 oz |
| Receiver |
9 g |
0.3 oz |
| Tail servos |
20 g |
0.7 oz |
| Wing servos |
44 g |
1.6 oz |
| Speed control |
33 g |
1.2 oz |
| Motor |
80 g |
2.8 oz |
| Prop & spinner |
18 g |
0.6 oz |
| Battery |
90 g |
3.2 oz |
| Flying weight |
1300 g |
45.9 oz |
| Neutrino Recommended Servos |
|---|
| Elevator & rudder |
KST X08, MKS DS6100, MKS HV6100, KST X08, Blue Bird BMS-M15H |
| Aileron |
KST X08, KST X08 Plus, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-M15V |
| Flap |
KST X10 Mini, MKS DS6100, MKS HV6100, MKS HV6110, MKS HV6130, Blue Bird BMS-M15V, Blue Bird BMS-M57V |
| F5J Powertrain Recommendations |
|---|
| Powerline Micro 1015 |
3S 1Ah LiPo, 16x8 prop (10 m/s, 2000 fpm, 43A) |
| Powerline Micro 1020 |
3S 1Ah LiPo, 16x8 prop (11 m/s, 2000 fpm, 44A) |
| Powerline Micro 1025 |
3S 1Ah LiPo, 16x8 prop (10 m/s, 2000 fpm, 43A) |
| Leomotion L3007-5000R |
3S 1Ah LiPo, 13x6 prop (7 m/s, 39A) |
| Axi 2220/20 V2 Long |
3S 1Ah LiPo, 13x8 prop (6 m/s, 35A) |
| Recommended Control Throws |
|---|
| Rudder |
45 mm each way |
| Elevator |
12 mm up / 12 mm down |
| Ailerons |
16 mm up / 10 mm down |
| Flap |
3 mm up / 80 degree down |
| Recommended flight mode settings |
| Speed mode |
flap 3 mm up, ailerons aligned with flap |
| Cruise mode |
flap 0, ailerons aligned with flap |
| Thermal mode |
flap 4 mm down, ailerons aligned with flap |
| Crow brake mix |
10 mm up aileron with full down flap |
| Ail->Rudder mix |
25 mm rudder with full aileron |
