Donatas Design Arrow V.6

Arrow V.6 picture By Daniel Just. ( http://www.danieljust.de/)

Arrow V.6 is latest release from Donatas Design, it evolved from famous 4D trainer with variable pitch propeller placed inside fuselage. We think this plane is the best choice for those who want to learn 3D or 4D flying. All Arrow V.6 kits are milled. Milling saves about 8-9 grams. This weight saving gives you a chance to choose little heavier but better working servos, or batteries of bigger capacity.

Kit include milled and painted depron parts together with big amount of hi quality carbon and fiberglass hardware. KIT PRICE IS 69 eur + shipping. Kits will be available since mid. of December. Preorder yours: donatasdesign@gmail.com

Arrow V.6 has really big control surfaces, so it can be very responsive in all axis. To control plane with precision hi quality servos are very important.  Here is our recommendations for equipment :

Servos

A.) Hitec 65hb single servo on ailerons and rudder, best performance on 6 Volts.

B.) Digital Hitec 5035 single servo on all surfaces
(to achieve lightest possible RTF weight).
C.) Dig. JR 290G single servo for elev. and rudd. 2 servos can be used on ailerons.
D.) Dig. JR 188 single servo for elev. and rudd. 2 servos can be used on ailerons.
If you select different brand product’s, try to select servos that have at least 0,12S/60 speed
and 0,8kg/cm torque. Weight should not be higher than 9 grams for each servo).

Motor
Motor should be efficient. Its weight has to be no more than 20 grams for indoor and no
more than 25 grams for outdoor use. We have achieved great results with AXI (Model motors)
products (made in Czech Republic).
Motor A.) AXI2203/Race (18,5g) + GWS 8×4,3 (for regular indoor flying).
B.) AXI2203/40 + Mamo models „UpSideDown“ VPP system with 9 inch blades.
(For indoor VPP flying, when model is build extremely light up to 160g RTF).
C.) AXI 2204/54 (25,9g) + GWS 9×3,8 (for outdoor flying in light wind).
D.) AXI 2204/54 EVP (25,9g) (for VPP flying outdoor).
Note: additional reinforcement to airframe will be needed if you decide to use more powerful 3S motor.

ESC

Good quality electronic speed controller is a must. In indoor flying good throttle response is

extremely important. Since very first flights indoor in 2004year , we start using Castle Creation
Phoenix 10A esc, so far we had 0 failures, it is most reliable piece of hardware we use. Our
recommended Castle Creation Phoenix 10A setup for 2S lypo: Cutoff Voltage 6.0 v , Cutoff type -
Soft Cutoff, Brake Strenght- 0%, Motor start power -Medium (59), Throttle Response – High (8),
Current limiting – insensitive, Motor Timing – Standart advanced or High advanced.
From budget line controllers Castle Creation Thunderbird 9 is also good option. This is “plug
and play” type ESC, so it does not have all setup options.
For battery we recommend to select at least 25 C lypo battery. I found that Desire Power
product’s are reliable and provide good power for long time.
Battery

A.) Desire Power V8, 35C 300mah, 2S/7,4V , battery weight 16g. (Very light indoor)

B.) Desire Power V8, 35C 380mah, 2S/7,4V , battery weight 22g. (Powerful indoor)
C.) Desire Power V8, 35C 380mah, 3S/11.1V , battery weight 30g.
(Very powerful outdoor or VPP flying)
D.) Desire Power V8, 35C 500mah, 2S/7,4V , battery weight 28g. (Light indoor)
Receiver As light as possible. For example we use these receivers with great success:
A.) Spektrum 2,4ghz Ar6300 2g.
B.) Duplex 2,4ghz R6G indoor 3,6g.

Radio

At least 4 channel programmable radio with minimum programming of exponential is necessary. However we would recommend to use more advanced radio like JR 9503 or JR 11 that have travel adjustment, throttle curve, dual rates, trim steps, digital trimmers, mixes, and other useful functions. These programming features will help you to setup your plane faster and to seek for the best results. If you plan to try VPP flying, such radio is a must, you will need pitch curve, throttle curve with at least 5 programing points, and two flight modes will be necessary. With such setup you should be able to fit in recommended weight limits ( 145-185g).Do not worry if your plane end up bit heawy. Arrow V.6 is not pattern plane and extra weight do not cause problems, in fact bit heavier plane make snap rolls better. Our average Arrow weight is 173g. Building and correct Center of Gravity When you build your Arrow V.6, try to do this on perfect flat surface. Pay attention to small details and result will be straight and truly great flying airplane. All equipment should be close to center of gravity, and it must be placed equal in vertical and horizontal axis. With such equipment placing plane will be balanced and will fly straight. Good starting point for Center of gravity (C.G.) should be somewhere around: 113mm from leading wing edge, or 242mm from motor mount. At this C.G. plane is really neutral, upright it fly without any elevator correction, and on inverted it require just small touch of down elevator. From this point you can adjust C.G to your personal flying style. Moving it forward (nose heawy) will make plane more stable and predictable. Moving C.G backward (tail heawy) will make more unstable
and sensitive. Some 3D maneuvers like harrier and hovering will be easier to learn. As you can see control surfaces on Arrow V.6 are quite big. We recommend to use full deflection of all surfaces with more expo’s. This will allow you to create and perform unique crazy maneuvers. This will be useful if you participate in aeromuscial competitions. Two minutes competition flight go by very fast and there is not time for switching flight modes for different control surface deflections. However when you fly for fun it is quite interesting to set up low rates and fly the plane outside in light wind conditions. It is very interesting to see how agile plane like Arrow 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. Always be patient when you set up your control horns and servo arms; it is always better to use mechanical adjustments Control throws I highly recommend that you use a throw meter that measures in degrees. There are several units available commercially. These units are a great aid in set-up and definitely beat the “that looks about right” method. For any type of precision flying, surfaces that travel equal distances are a must. Different deflection on ailerons will cause badly looking rolls. This is our recommended throws for Arrow V.6 naturally each pilot is different, and slightly different deflections and exponential rates may fell better for you. So just start here and then adjust to fit your own preferences and style of flying.

Recommended deflection and expo setup:
Elevator: 65-70 degrees (hi rate), +65% exponential
Aileron: 55-60 degrees (hi rate), +65% exponential
Rudder: As much as elevator cut out allow (hi rate), +65% exponential
Note: Futaba and Hitec radios mark exponential opposite -instead of + to reach „softer“ felling in center of stick.

Please pay attention to safety when you fly this and any other RC model; planes or propeller can cause injury or damage to property if used improperly. I wish you many hours of safe and fun flying with this model !!!

Detailed manual and more information about Arrow V.6 coming in near future. So far please take a look to: Arrow V.5 manual: good technical tips and tricks can be found here: http://donatasdesign.com/downloads/Manuals/DonatasDesignArrowV5Manual.pdf So far please enjoy couple fresh videos by Jurgen Heilig from EIAC competition.

Donatas Pauzuolis aeromusical flight in EIAC/German championship 2012 by Donatas Paužuolis.

Ignas Matulevičius aeromusical flight in EIAC/German championship 2012 with Arrow V.6.

Stay tuned, more info and videos are coming in near future!