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Simitri F5J 3.9m

Product Code: SIMITRI
 (3 reviews)

Price: $1,682.76

Out of stock, notify me when back in stock

Description

The Simitri F5J is a brilliant design, with top quality construction and amazing value. The wing and tailplane are of all spread carbon construction, making the model extremely tough, rigid, and light. The aerodynamic design is similar to the Maxa and the Perfection - thus aerodynamically and structurally it has an excellent herritage. This shows in its very forgiving flying characteristics, excellent speed range, superb glide angle and also a very low sink speed.

The fuselage is very well thought out, with the motor, speed control, and rudder and elevator servos fitting at the front of the pod, with enough room to slip the battery through the large canopy hatch into the ample space behind the servos. Aft of that there is a ballast tube, so the plane's weight can be adjusted for windy conditions - however its excellent polar gives it a good speed range so extra weight is only beneficial for wind speeds above 15 mph (7m/s, 24 km/h).

The spread carbon skinned wing has a substantial spar, allowing high energy aerobatics if required. The wing is of conventional three piece construction. The control surfaces are large, so camber changes are very effective, and the large flaps allow the plane to be spot landed with ease. The spread carbon tailplane has a separate elevator to give very precise pitch control. The carbon fin sports a large film covered rudder to minimise tail weight, and is removable to help with transportation. The fit and finish is very good, with all the parts sliding into place perfectly. The pushrods, all control horns and linkages are supplied. The only work required to get the model airborne is gluing the tailboom and installing the RC and powertrain.

See the RC Groups Simitri discussion for more info.

Simitri F5J Specifications
Wing span 3.9 m 152 in
Wing area 83.1 dm2 1288 sq in
Length 190 cm 74.8 in
Flying weight from 1531 g 54.0 oz
Wing loading 18.4 g/dm 6.0 oz/sq ft
Aspect ratio 17.8
Wing airfoil Proprietary
Dihedral (EDA) 9.8º
Spinner Diameter 32 mm
Centre of Gravity 100-112 mm from wing leading edge
Controls Rudder, elevator, ailerons, flaps, throttle


Simitri F5J Typical Weights
Pod 136 g 4.8 oz
Boom & pushrods 90 g 3.2 oz
Wing centre panel 386 g 13.6 oz
Wing tip panels 410 g 14.5 oz
Tailplane 42 g 1.5 oz
Fin 40 g 1.4 oz
Accessories 75 g 2.6 oz
Total structure 1180 g 41.6 oz
Wiring 20 g 0.7 oz
Receiver 10 g 0.4 oz
Tail servos 22 g 0.8 oz
Wing servos 44 g 1.6 oz
Speed control 30 g 1.1 oz
Motor 100 g 3.5 oz
Prop & spinner 25 g 0.9 oz
Battery 100 g 3.5 oz
Flying weight 1530 g 54.0 oz



Recommended Servos
Elevator & rudder MKS DS6100, MKS HV6100, KST X08
Flap MKS DS6100, MKS HV6100, KST DS135, KST X10 Mini, MKS HV6130
Aileron MKS DS6100, MKS HV6100, KST DS135, KST X10 Mini



Powertrain Recommendations
Powerline Micro 1025 Turbo/3S 3S 1Ah LiPo, 16x8 prop
Powerline Micro 1020 Turbo/3S 3S 1Ah LiPo, 16x8 prop
Powerline Micro 1025 Turbo/3S 3S 1Ah LiPo, 16x8 prop
Leomotion L3007-5000 3S 1Ah LiPo, 16x8 prop
Leomotion L3013-4550 3S 1Ah LiPo, 15x9 prop
Hacker A20-6XL geared 4.4:1 3S 1Ah LiPo, 16x9 prop



Simitri Control Movements
Rudder 25 mm each way
Flap 85 degrees down
Ailerons 15 mm up, 12 mm down
Elevator 10 mm up, 10 mm down
Recommended camber settings (measured at flap root TE)
Speed mode -1.5° (flat bottom surface)
Cruise mode 0° (flat top surface at hinge)
Thermal mode +2° (3 mm down)

Reviews 3  


 Review by:

Simitri is awesome

Simitri F5J Light version
I bought my Simitri with end of May 2020. Kit was delivered on June 5 in solid plywood box. The quality of the packaging is max. safe and inside the box all glider components were carefully wrapped in protective foil.In my case, the components were still stored in plywood box in Hyperflight transport bag, which I also obtained together with model.

Weight componets right from kit:
Front Pod with cabin, balast tube removed.............................................................108g
boom with two bowdens ...........................................................................................83g
Left wing tip...............................................................................................................203g
Right wing tip.............................................................................................................203g
Central panel with two mounting screws................................................................368g
rudder with mounting CFK pipe and control horn.....................................................42g
Elevator with mounting screws and CFK graft..........................................................42g
wing joiners, LDS GFK rods , servoplate....................................................................32g
Total empty kit components weight......................................................................1081g

Weight equipment and components :
4x transparent wing covers for servo caves ...............................................................8g
4xFutaba 3173 SVi with servorahmen frame kits and MPJet Alu segments .......100g
2xMKS HV6100 with reduced servoplate .................................................................26g
All SVi servo cables from wing...................................................................................30g
Motor XPower F2919/10 400W..................................................................................86g
HyperSpinner power 32mm diam. and Vitaprop 11 x 6 ...........................................22g
Gens Tattu 1300 mAh/3S 75C/150C.......................................................................117g
YGE 65 LVT regler........................................................................................................45g
Futaba receiver 7006SB................................................................................................8g
Telemetry modul UNILog II with integrated vario........................................................9g
Total weight of equipment........................................................................................451g

Total weight RTF...............................................................................1532g + 70g ballast

But CG was in my case 127 mm behind LE and it was to much for me. I had to adjust the CG to 115 mm behind the LE wing using about 70 g of lead in front of the fuselage.

Alteration against kit:
Rudder fastening -
In original design rudder steven has not secure fastening on the fuselage. For fix it steven CFK pipe has been added by an Alu insert with M3 thread at the lower end.This Alu insert ( 10mm lenght, 5mm diam.) was glued to CFK pipe by epoxy resin.The upper end of the pipe was secure glued to pipe housing in rudder steven.A hole for the M3 screw was drilled from the bottom of the fuselage against the CFK pipe. Now the steven with rudder is secured with an M3 screw 11mm long.

Receiver location -
After a good experience with this solution from AVA Pro glider I again placed the receiver on top of the wing carrier, directly below the center of the wing between the two mounting screws. The receiver is fixed in place with Velcro. I just have to make a small cave from the bottom of the wing (20x50mm in case of Futaba 7006SB receiver). Benefits of this solution :
-All cables from the fuselage (ECS, Vario, Rudder and Ele servo) are permanently connected with their original connectors to the receiver- without the need for any soldering. Before attaching the wing, I must connect only one original Futaba servo connector from the wing to the S-BUS receiver socket. This connector is attached to the SVi cables in the wing and supplies the signal for all 4 servos over only one single wire (S-BUS is awesome).

Elevator throw extension -
Simitri has about 30 mm control "horn" for elevator.With this 30mm control horn I was not able to achieve sufficient deviation of elevator. I didn't want to extremely extend the servo lever for loss of servo power. In order to get a full throw of elevator (both ways) I have to reduce lenght of that horn to approx.20mm. I removed the brass horn from the fuselage and cut off the lower end with link eye. Then I tapped the new end and after that I drilled a new link eye for attach the control rod.

Other work was standard, nothing new, thanks to the equipped LDS rods, the installation of servos in the wings is greatly simplified.

The first flight took place on June 16 and Simitri flies great as I expected.

Jan


 Review by:

The Simitri and F5J bag arived today. Exellent job, from GB to Germany depot only one day! Quality of package exellent.and model quality eminent.
Now, I am looking out some F5J Maxa on your sites, Cristmas is coming soon.....:-D
Thank you so much Jan in CZ


 Review by:

Simitri

Très content de la qualité du kit qui est arrivé très bien emballé.
Montage en cours


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