Krill-Model.com

We would like to thank you for purchasing our product developed in co-operation with Sebastiano Silvestri – top aerobatic pilot from Italy. Thanks to his experiences and our hi-tech production technology, you have an excellent aerobatic airplane useful for fun-flying and competition flying, as well.
We wish you many wonderful flights and safe landings!

Your Krill Model production team

First of all, please check if your kit is complete:

F/G parts – fuselage (1 piece), elevator L/R (1 piece), wings L/R (1 piece), landing gear (1 piece), wheel pants (2 pcs.), canopy frame (1 piece), landing gear scuffs (2 pcs.)
Accessories – Alu wing tube 30mm diameter (1 piece),
Alu wing tube 10mm diameter (1 piece),
Wheel 70 mm (2 pcs.), tail wheel (1 piece),
Screws 4/12 (2 pcs.),
Wheel axles (2 pcs.),
M5 screws (13 pcs.),
M4 screws (4 pcs.),
M5 blind nut,
Wooden washers 50mm diameter (3 pcs.),
Hinges (4 pcs.),
Rudder post (1 piece),
Engine box (6 parts),
M5 large steel washers (3 pcs.),
Clear canopy (1 piece),
Horns (6 pcs.),
Canopy hold downs (4 pcs.),
Alu “L” brackets (2 pcs),
Servo bay covers + mounting blocks + self-adhesive vinyls (2 pcs of each),
Screws 2,8x9 (12 pcs.).
Other accessories
This is recommended equipment for your KRILL Katana 2,2m. Of course, you can use your favourite brand, just pay attention to quality and accuracy, specially to servos.
1. powerful servos – we recommend Graupner/JR 8411, Futaba S9351 or
2. HITEC 5955 MG for all surfaces …5 pcs. Elevator servos should have metal gears!!
3. accurate engine servo – for example Graupner /JR 4041
4. Alu spinner 90 mm diameter (KS , Tru-Turn …)
5. engine - 50-70ccm (DA50, 3W55, BME55, MVVS58, ZDZ50NG)
6. suitable mufflers recommended by manufacturers
7. suitable propeller
8. quality extension leads with gold-plated connectors in following lengths:
2 x 30 cm, 2 x 110 cm, 1 x 50 cm
9. quality ball joints and all other surface servos accessories. Size M3! (MPJET, DU-BRO, Airwild …)
10. Main battery 2400 – 3600 mA/6V ( NimH , NC ) – recommended
11. Ignition battery 1400-2000 mA/4,2 V – recommended
12. 500 ml fuel tank with filter
13. Power Box Sensor
14. Ignition switch

Assembling Instruction:

As you will find out, there is not too much to „build“with our model airplane. We assume, you are not a beginner, so you have your own methods and tip how to set this airplane. If you have any question, please don’t hesitate to contact us: service@krill-model.com
All you have to do is to install RC equipment, engine and accessories. You can find some inspiration on enclosed CD – there are detail pictures of particular assembling stages.
Before looking at pictures, please read this instruction very carefully to understand assembling process correctly.

IMPORTANT: For those of you who had different types of Katana made by other manufacturers – OUR KIT VARIES WIDELY, so before any cutting or gluing, make sure this operation will cause the wanted effect.

FUSELAGE
Fuselage is vacuumed sandwich; all internal parts are installed already.
There is no need of any other reinforcement. Remember – each added part and used glue would just result in increased weight.

Muffler and cooling openings have to be strengthen by gluing carbon fiber rowing from inside or gluing a plywood support. (see picture)!!!

Fuel tank, muffler and rudder servo holder
Use our templates, print them and cut from proper material – 3mm thick plywood, C/F sandwich or other strong material.

Rudder servo –the easiest way is to mount it together with receiver and Power Box is on one central panel. You can mount the fuel tank on bottom part of this panel – see picture.
Fuel tank and smoke pumps have to be installed at the C of G (area under or above the wing tube)
Muffler holder – use silicone rings approx. 10mm length, diameter 14-18 mm to seal the area between muffler holder and muffler. Muffler holder has two parts – top part (for screws) and bottom part (glued to landing gear area). Installation of engine box is more comfortable because of this.

Engine box
Wooden parts set of - A1,A2,B,C,D,E.
Assembly the engine box step by step as you see it on pictures. It is constructed with regard to engine power, airplane wear and its C of G.
Please, DON’T replace any part with different thinner/lighter material!!!
Engine box is designed to install the engine, servo and whole muffler system outside the fuselage. You can mount this whole unit as one piece to fuselage using 6 M5 screws. IT IS SOOO EASY AND HANDY!!!
At first, we recommend to assembly engine box and tack it with CA glue.
Templates – choose the engine type you will use. Print appropriate template, mark the dimension on front part of engine box marked „C“.
Install engine and mount the engine box to fuselage using 6 M5 screws. Now, you will find out if you need to shim the engine or move it a bit. Engine offset – see picture.
Measure the position for throttle servo installation. You can use one of A1-A2 side parts.
After engine installation, mount the muffler system. You need to cut the opening for muffler on the bottom part of fuselage. Measure twice!
When the whole unit (engine box/engine/muffler) is measured and fits, take it apart and then glue properly. Use slow drying epoxy. We recommend to apply epoxy resin on whole engine box – good as surface treatment and fuel protection.
Let it dry, then install all parts and screw the engine box to the fuselage.
Use Locktite to secure screws!!

Tail wheel - 1 piece of tail wheel, 2 pcs. of M4 wood screws
Centre the tail wheel, mark 2 holes, drill them using 2mm drill bit and mount it using
2 wood screws.
Tail wheel control – see pictures.

CANOPY - 1 x clear canopy, 4x C/F horn, 2 x M4 screw
We recommend to install canopy according to our method, it is tried and tested and very easy.
Step 1
Choose the type of attaching – canopy frame/hatch:
A. You can use 2 dowels – see picture
B. Or you can use 2 M4 screws
Remember! Glue plywood washers (3mm diameter) from inside anywhere you make holes. Place the canopy frame on fuselage and fix with paper tape. Drill holes, glue dowels or use screws.
Step 2
Inside fuselage you can find 4 areas enforced with plywood where you will install hold downs.
1. Mark center-point on top of the edge of fuselage frame. Cut slots – 5x20mm approximately 4 mm from outer line of fuselage.
2. Cut 4x10mm hold downs slots on frame – matching the slots on fuselage.
3. Cut M4 thread where marked.
4. Install hold downs, measure horizontal and vertical axis for screw hole, drill M4 thread. Caution – hold downs slanted parts have to face towards the spinner.
5. Place the canopy frame and make sure everything fits. Glue hold downs from inside the frame. Fix the frame with paper tape, screw fix screws and let dry.
Step 3
Attaching the clear canopy to frame.
Remember! Always glue the canopy to the canopy frame attached to fuselage!
1. Cut the canopy as marked and clean the edges.
2. Cut the canopy opening in canopy frame and sand edges.
3. Fix the canopy with tape – see picture.
4. After centering the canopy, tape it around canopy frame – see picture.
5. Now, you can remove canopy frame with canopy from fuselage . Take off vertical tape and tape exposed areas with horizontal tape.
6. Glue canopy from inside using polyurethane glue or other glue recommended for gluing canopy and screw it to the fuselage.
7. Let dry and then take off the tape.

LANDING GEAR - 3 pcs of M5 screws, 3 pcs. of M5 blind nuts, 3 pcs of plywood washer, 3 pcs of large M5 steel easher, 2 pcs of wheel axles + M8 blind nut, 2 pcs of 70mm diameter wheels, 2 pcs of F/G wheelpants, 2 pcs of scuffs
First step – drill 3 holes (M5,1mm diameter) for mounting the landing gear and
2 holes for wheel axles.
Push blind nuts into the circle wooden washers and glue them on 3 drilled holes inside the fuselage on landing gear bedding. Use M5 screws to mount the landing gear and let it dry. Don’t let the glue run into blind nut thread.
Use large M5 steel washers with these M5 screws. It is important to spread the load on landing gear.
Put 2 scuffs on landing gear; fix them with silicone or polyurethane glue.
Put the wheels on axles, secure them with the nut and screw to the landing gear. Make a cut out in wheel pants as marked. Insert the wheels and use silicone where wheel pants touch the landing gear (area 20x20mm). Secure the wheel pants using M5 nut.

RUDDER - 4 x hinge, 1x rudder post, 1x F/G control horn
Mark the hinge slots on wooden rudder post, cut them and glue in 4 hinges.
Securing the hinge – see picture.
Rudder control – cut the slot for F/G horn as marked. Glue it using the epoxy glue as you can see on picture.
Set the wooden rudder post with hinges on rudder and secure on top and bottom with paper tape – see picture.
Try to set the rudder to the fuselage. Fuselage should overlap the wooden rudder post not more than 8 mm, if it is longer, shorten sides of the fin.
If everything fits inside fuselage, tack it using 5-minute-epoxy glue. Set the rudder with wooden post to the fuselage; fix the rudder using paper tape, approx. after 10 minutes remove the rudder. Wooden rudder post stays in fuselage.
Now using a 30min.epoxy, glue whole rudder post all around.
Caution! Glue the rudder when you are sure that everything works and you have enough throws. It can also be glued even after painting the airplane.
Rudder control slots – pull-pull system – see picture.

WINGS - 2 x – 2 mm thick plywood floor, 4 x plywood strip, 12 x 2,9x9 wood screw , 2 x C/ F horns
The wings are fitted to the fuselage already. Join it using 30mm Alu tube and 4 M5 screws inside fuselage.

Servos installation
Servo bays are already prepared. Sand both plywood covers to fit the bays. Install servos as you see on picture. If you choose this method, secure the servo wood blocks with wood screw!
Drill slots for aileron control horns as marked and glue using epoxy glue – see picture „trick“.
If you want, you can choose different control horns system. There is an area filled with balsa wood approx. 4x4 cm.
You need extension servo leads, fix it tight inside wings using tape or silicone. There is a 10mm opening to put extension servo lead through in root rib, make the same opening in fuselage.

Wings securing and setting
Sliding wings system is very important.
The wing is made of C/F, you have to hold it on L/E. Don’t push on nor bang on the wing end! Disassembly it the same way.
Securing wings to fuselage is done with 4xM5 screws from inside the fuselage.
Enlarge pre-drilled holes enough for M5 screw to go through. Don’t drill any large holes! Remember – trailing edges needs to be in the same distance from canopy frame border – see picture.
If you find out it is necessary to modify wings angle, just drill the back holes in fuselage up or down, as you need and set the angle you need. Then fill the existing hole by gluing wooden washer over it.

ELEVATOR - 2x “L”brackets, 2 x 2,7x9 mm screw, 10mm stab tube
Servos and horns installation is the same as wings installation.
We recommend gluing the stab tube into half of elevator.

It is necessary to secure elevator
There is a 6mm anti-rotation pin in front part of stab. Glue the C/F L bracket to the pre-drilled slot. This L bracket is for securing the elevator to fuselage. Sand the horn where glued, using 10-minute-epoxy to glue it. Make sure control horn is aligned with L/E of elevator – see picture. We recommend securing control horn with small screw.
Place both halves of elevators on fuselage and mark the screw spots. Drill maximum 2mm hole and screw the thread. (This area is stiffened inside with plywood)

Caution - Use these screws to secure elevator before each flight!!!

BATTETY INSTALLATION
We recommend securing all wires (from batteries, receiver, servos and switches) properly so they cannot move during aerobatic maneuvers.

C OF G
You can see the C of G basic setting on picture. Battery installation should be the last thing to do. Use battery to get a proper C/G position.
If you use single-cylinder engine, place batteries in front part of airplane – on engine box.

THE PAINT JOB
You can use any kind of paint or vinyl.
You CAN NOT use iron-on vinyls because of thermal stress!!!
Choose suitable color shades. We don’t recommend dark color painting because of the thermal stress caused by sun heat. This can results in deformation or stronghold depression on some parts! The same applies to transport or storage in inappropriate „greenhouse“places!!

TTRANSPORT, STORAGE AND CARRYING OF AIRPLANE
Store and transport the airplane using a proper protection; fuselage set on its landing gears and wings in bags. Store it in dry place with room temperature.

REMEMBER – by proper manipulation and transportation you extend the life span of your airplane!!!

Model Airplane Flying - Basic Safety Rules:

- Before each flight exercise pre-flight control of every airplane part.
- Model airplane is not a toy! You are responsible for its correct usage!
- Be aware of children, keep them in safe distance – see picture.
- Fly only at model airplane fields.
- Avoid extreme temperatures – 40 C and up. Protect airplane from the sun.
- After each flight switch off the batteries.
After flying, before transportation and storage:
- Drain the fuel,
- Check whether all batteries are switched off.

KRILL.B.P,s r.o. is not responsible for any damages caused by using this model airplane. Model airplane owner is using it on his own responsibility.

Elevator	High rates Low rates	60-70mm at the root 40% of high rates
Ailerons	High rates Low rates	50mm at the root 30mm
Rudder	High rates Low rates	as much as you can get 60% from high rates
Aileron differential		100% down 93% up

Please, let us know whether you like this instruction manual or you have any ideas to improve it. We hope you will share your finished airplane pictures with us. If you have any question, don’t hesitate to contact us: service@krill-model.com or our agents. We appreciate your comments very much! HAVE FUN!!!

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