Tuesday, February 21, 2017
Home » Product Reviews » Rotormast V-22 Osprey – Part I

Rotormast V-22 Osprey – Part I


Another Giant Leap For Technical Achievement in RC
I was a Marine in the 70s, and had the good fortune to be assigned as an Avionics technician on the AV8A Harrier. I was responsible for the maintenance and repair of the Autostab system, which while not officially an autopilot, was there to help the pilot maintain safe hovering flight. As a result, any modern model that can transition from hover to forward flight, (and back), is going to get my total attention! Not to mention that the V-22 is the current state of the art deployment method for Marines in the field. This model was a must for my interests and passions!

It is highly recommended to build the V-22 in the profile mode for initial phases of familiarization and flight. There is so much to get comfortable with that to have it covered could slow your progress.

The first thing you do when building your Osprey is to go online to the Rotormast.com website. There are many valuable videos to motivate you, as well as the instructions and a program that you download to configure all the components. It is aptly named The Configurator Program. Other items on the website are the recommended settings for the Castle controller(s), a great FAQ section, and a download section for the manual( s) and the software.

The manual is broken down into nine sections. While daunting at first, each has a clear and valuable contribution. Having the manuals online is also great, as the manufacturer is constantly adding information to ease your build. If you print out any of the manuals, make sure you write the version on the face of that section, so you can always verify that you have the latest version. The first section is a general overview and it includes specifications. It gives you a table of contents for the rest of the manual sections, which I have outlined below, and required safety statements and warnings.

A. Mechanics. This is most of your build of swashplates and subassemblies within the individual nacelles.
B. Component installation of the left and right nacelles.
C. Wiring and connections. This applies to all of the connections on either side of the onboard controller. (BEC, nacelles, RPM sensor, ESCs and batteries).
D. Component setup of the speed controls, gyros, BECs, the onboard controller, latest updates that can be uploaded off the website, and your transmitter configuration.
E. Controller programming and transmitter setup. Cyclic settings and pitch/throttle settings.
F. Blade tracking, preflight and prep for flight.
G. Scale body assembly and installation.
H. References and Photos.
I. Parts breakdown.

The build of the model is very similar to the construction of many 450-550 sized helis that I have assembled in the last couple of years. There are plenty of bagged subassemblies, and all are marked well and relate to the instruction manual sections. The challenge is that you make mirror image assemblies between the right and left side nacelles. Careful attention to the instructions and photos is crucial, and having a clean build surface is mandatory. There are lots of little ball links and washers to roll when you least expect them to move! I found that filling unused parts from the parts bags into white bowls allows me to keep assembly steps under control! I also learned that I should vacuum the floor, so that any little parts I drop can be quickly found!

Rotormast did an incredible job of creating a light but accurate and detailed scale body system for the V-22. Panel lines are all in the mold, and the results are awesome! Any modelers desiring more details, such as cockpit details, have a great threshold to start with! Next issue we will walk you through the setup and flight of the Osprey!

TYPE: Tilt rotor
FOR: Intermediate aircraft and heli builders and pilots
FLYING WEIGHT: 5 lb., 8oz.
LENGTH: 38.6 in.
ROTOR SPAN: 25.3 in.
RADIO: 7 channels required; flown with a JR 11X transmitter, AR 9300 receiver, Hitec 5085MG servos, JR G270 gyros, Castle BEC
POWER SYSTEM: (2) Scorpion HKII-2221-10 motor, Castle 50-amp speed control, (2)- 4S 1P LiPo cell 2200mA capacity
MINIMAL FLYING AREA: Normal RC field for forward flight
PRICE: $1,699 (scale kit); $1,399 (profile kit)
COMPONENTS NEEDED TO COMPLETE: 3 gyros; 2 4s1P 2200mA LiPo packs, receiver, servos, 7-channel transmitter

SUMMARY: This model is a revolution for our hobby. It represents a leap forward in technology that only occurs about once a millennium! There are two complete cyclic systems in each of the rotating nacelles and an ingenious control unit that coordinates mixing and system transitions from hovering flight to forward flight and back. Gyro stabilization is in all three axes. This model represents a challenge for all interests! Do you love multi-engine models? Complex helis? State of the art programming and cutting edge technology? The Osprey has more wow factor than any two models I have ever built.

This is the central processor brain that does complex mixing to give the V-22 rock solid stability in a complex flight envelope. Blades and motor nacelle panels. The molded composite body with wood understructure.
The Scorpion HKII-2221-10 motor.Basic airframe components The build includes use of many small parts”use a bowl to keep them organized.These servos are unique in my experience. They have external potentiometers that track the rotation of the nacelles when the rotors tilt.The wing has a thick airfoil.

Castle Creations, www.castlecreations.com, (913) 390-6939
Hitec USA, www.hitecrcd.com, (858) 748-6948
JR, distributed exclusively by Horizon Hobby Distributors, www.jrradios.com, (800) 338-4639
Scorpion Motors, distributed exclusively by Innov8tive Designs, www.innov8tivedesigns.com, (760) 468-8838