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Donatas Design Arrow V.5 Assembly Manual

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Thank you for buying aeromusical plane Arrow V.5 from Donatas Design!
Arrow V.5 evolved from famous 4D trainer with variable pitch propeller placed inside the fuselage.
This plane is the best choice for those who want to learn 3D or 4D flying.
This plane kit is milled in order to save some plane's weight (about 9 grams). This is very important
factor while competing in F3P competitions.
I recommend to use 18,5g AXI2203/RACE motor and 2s light lypo battery for Arrow V.5 if you plan
to fly indoor. For outdoor flights AXI 2204/54 with 3s light lypo are recommended.
NOTE! Additional reinforcement to the airframe will be needed if you decide to use more
powerfull motor.
This kit includes all items necessary to finish the kit: depron parts, carbon rods, flat carbon, hi
quality fiberglass hardware set, motor mount, Z ends for servo attachment, velcro tape for battery
fixation and pull-pull line.
Equipment selection
Motor:
AXI2203/Race (for indoor flying, weight - 18,5g)
AXI2203/40 (for indoor VPP flying, when model is extremely light)
AXI 2204/54 (for outdoor flying in light wind, weight - 25,9g)
AXI 2204/54 EVP (VPP flying, motor weight - 25,9g)
ESC:
Competition option Castle Creation Phoenix 10a, budget version CC Thunderbird 9.
Battery: Desire Power V8, 35C 300mah, 2S/7,4V, weight 16g. (Light indoor)
Desire Power V8, 35C 380mah, 2S/7,4V, weight 22g. (Powerful indoor)
Desire Power V8, 35C 380mah, 3S/11.1V, weight 30g. (Powerful outdoor or VPP)
Servos: Dig. JR 290G single servo for elevator and rudder, 2 servos can be used on ailerons.
Dig. JR 188 single servo for elevator or rudder, 2 servos can be used on ailerons.
Hitec 65hb single servo on ailerons and rudder.
Radio: At least 4 channel programmable radio with minimum programming of exponential. I would
recommend more advanced radio like JR 9 or JR11 that have travel adjustment, dual rates, trim
steps, digital trimmers, mixes, and other useful functions. These will help you to setup your plane
faster and to seek for the best results.
Receiver : As light as possible! For e.g., I use and have no complaints about:
Assembly manual
Spektrum 2,4ghz Ar6300 2g.
Duplex 2.4ghz R6Gindoor 3.6g
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Summary of Contents for Donatas Design Arrow V.5

  • Page 1 This plane kit is milled in order to save some plane’s weight (about 9 grams). This is very important factor while competing in F3P competitions. I recommend to use 18,5g AXI2203/RACE motor and 2s light lypo battery for Arrow V.5 if you plan to fly indoor. For outdoor flights AXI 2204/54 with 3s light lypo are recommended.
  • Page 2 Here you can see fiberglass hardware set. It was done in order to achieve the best control of plane’s moving surfaces. Now you can use long servo arms and servo horns. Moreover, you will be able to have less pressure on control rod, use full potential of your servos and not to lose resolution.

  • Page 3: Required Tools And Adhesives

    ‘’shave“ ends of 0,5mm flat carbon. You will Repeat this procedure for all parts. save some weight and will have very useful thin carbon. Cut aileron edge with Donatas Design Next step - reinforcement of some critical parts. Here you can see how aileron bevelling tool.
  • Page 4 Optional reinforcement: Glue thin carbon (you might use the one that remained after ‘’shaving“ the main carbon parts) like it is shown in the pictures. This gives very good strength for elevator and prevents stabilizer part from cracking. Glue 0.5 mm carbon on the back and leading edges of the wings. Carbon length required for back edge - 70 cm, for front - 83 cm.
  • Page 5 There are few ways of how you can attach elevator to stabilizer. The easy one is to cut control surface in 45 degree angle with Donatas Design bevelling tool and to use Blenderm tape to attach elevator to stabilizer (in the same way as ailerons are attached to the wings). Such method is good for those who use solid pull-push system.
  • Page 6 The time for the most important step of Arrow V.5 building has come. You should place tail section to the main wing precisely as shown in the picture. Use some heavy objects to press separate parts on the flat table. Measure distance from each wing tip to stabilizer very carefully. It has to be the same on the both sides.
  • Page 7 Cut slots for the “V” shape carbon reinforcement. This is Glue a flat thin carbon piece to reinforce the necessary step to ensure that both sides of the elevator top of the fuselage; this reduce the likelihood will deflect exactly the same for precise control. of the depron bending if an inverted landing occur.
  • Page 8 Now we need to prepare the main wing support. Here you can see reinforcement piece made from 0.5 mm fiberglass. You will find a similar part in your Arrow V.5 kit. Glue it at the centre of the wing chord on the bottom of the fuselage.
  • Page 9 Now you can glue two support SFG's from depron to the wing support carbon rods. This is optional aileron reinforcement using 1 mm carbon rod. This upgrade reduces aileron flex and makes roll control more precise and is highly recommended for Arrow V.5.
  • Page 10 Carbon structure from different angle. It is now a good time to glue flat carbon pieces into the “V shape slots we cut earlier. After gluing “ the flat carbon inside the epron slots, glue fiberglass square plates on the top and bottom of the elevator as shown in picture.
  • Page 11 Now it is time to decide what aileron servo configuration will be used. Arrow V.5 has very big and powerful ailerons, so strong servos are required. Single servo option is a Hitec 65HB connected to 6 volts (if connected to 2S lipo, it will burn out after ~50 flights).
  • Page 12 If you decide to use single servo, install it in the cut out of the wing, and glue the top of the fuselage as it is shown. Cut slots in the ailerons for the aileron horns. Try to keep them as symmetrical as possible. Next step - neutralize (zero) the trim and sub trim on the aileron channel of your radio, and put an original servo arm on the aileron servo, as close to the center position as possible.
  • Page 13 If you decide to use two aileron servos, glue foam into the single aileron servo mounting location. To prepare locations for two servos, cut servo size holes in both SFG's as shown. Having two aileron servos will require a little more setup work, but in my opinion is worth the time for the advantages gained.
  • Page 14 Here you can see 40 mm x 1.5 mm carbon rod installed to elevator. It must be exactly same length on both sides. The provided cable material will work fine. On the other hand, if you decide to use ball links instead of Z-bends, I recommend using ”upgraded”...
  • Page 15 For extra strength, the bottom hinges can be completed using fiberglass tape. I also put soft Velcro on tail skid area to prevent noise during takeoffs and landings. The standard motor mounting method uses either the wooden or fiberglass mounts in the kit. Using your motor as a template, mark hole locations on the mount, and attach the motor with screws.
  • Page 16 Optional: For more advanced pilots, I recommend trying TVC (Trust Vector Control) system to allow some crazy manoeuvres. Motor moves side to side with TVC, controlled by the rudder servo. Here you can see construction of such system. I use ball links connected to motor for smooth and noise free system.
  • Page 17 Here is the alternative way to make motor mount for TVC. The same M2 size ball links are used. Wrap bolts with thread and CA (gluing to the motor will be easier). I recommend to use good quality strong CA. My personal choice is Mercury Adhesives M1100G, this is extremely strong CA Glue 1.5 mm x 60 mm carbon rod as is shown in the picture.
  • Page 18 TVC systems that use one servo to control both the motor and rudder need to have the pull-pull cables crossed for the rudder to have the motor and rudder moving in the correct directions. You can see exact measurements for connecting TVC system In the picture below Example of motor mount for AXI 2203/40 (for VPP flying).
  • Page 19 Assembly of model is almost done, now its time to place all equipment. This last step is very important in order to set the correct center of gravity. My competition Arrow V.5 CG is 23.8 cm from the motor mount, and 11 cm from the wing leading edge.
  • Page 20 Final step in your plane assembly is the radio setup. Here you can see my personal settings on my JR9X radio. Arrow V.5 is very easy and neutral flying airplane; therefore no mixes are necessary. I just put throttle curve to 90% to limit amp draw, which is necessary since I use a slightly larger propeller (GWS 8x4.3) than AXI recommends for the AXI2203/Race motor.
  • Page 21 Rudder must travel all the way from left to right inside cut out in the elevator. Here you can see dual rate and exponential setup for all surfaces.
  • Page 22 It is very interesting to see how agile plane like Arrow V.5 can perform some IMAC/F3A types of flying. Most of computer radios allow you to set these modes really easily and I suggest exploring these options. Be always patient when you set up your control horns and servo arms;...