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Written by Bob Fiorenze
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Digital exclusive for the December 2012
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The full-scale Bell 230 is a twin-engine, 10-seat, light utility helicopter produced by the US manufacturer, Bell Helicopter Textron. Its first flight was on August 12, 1991.


Powered by twin 700-hp Rolls-Royce 250-C30G/2 engines, its output is at 100% of rating at 9598 engine rpm. Two independent drive shafts deliver power from the engines to the transmission. The Bell 230’s Allison engine-exhaust stacks are located high on the cowling. The fuel is stored in three tanks—one in the fuselage and one in each sponson. The main rear landing gear retracts into the sponsons.


The design includes two main rotor blades of stainless-steel and fiberglass construction, and a rotor hub with lubricant-free Elastomeric bearings. The system’s design is similar to that used by the AH-1 Cobra. Main rotor blade speed at 100% engine speed is 348 rpm.


The cabin holds a maximum of 10 people with one or two pilots and eight or nine passengers. Seating configurations include standard seating for 10, and the optional executive seating for up to two pilots and seating for up to six passengers.






The Bell 230 is usually flown by a single pilot (optional dual controls are available), and can be configured for corporate/executive, emergency medical, or utility transport missions.


The 230 had an optional skid or wheel undercarriage. Production ended in 1995, with 38 built. It was replaced in Bell’s lineup by the stretched, more powerful Bell 430.


The RC model Bell 230 started out as a Graupner/Heim white gel-coat fiberglass fuselage kit. It is 74 inches long with blades extended, 17 inches wide, and 18 inches tall. The kit comes with plywood formers for the nitro version, complete retract landing gear, wheels, decals and an instruction booklet.


Because I planned to convert it to electric power, I didn’t need any of the plywood formers and fabricated some new ones for the conversion. I am using the Miniature Aircraft Ion, which is an electric version of the company’s .90-size helicopter.


The motor is an Actro 32-3 with a Castle Creations Ice 120 HV speed controller. Rotor blade length is 700mm semisymmetrical.


Two Thunder Power 5S 3,800 mAh batteries provide power. The final flying weight is 12 pounds.


For guidance, I am using a JR 9303 radio with 2.4 GHz. Flight duration with the electric system is approximately 5 to 6 minutes, depending on how hard you lean on the throttle.


I installed a lighting system purchased from Dreamworks. It uses Luxeon Emitters instead of LEDs and requires a 2s (7.2-volt) LiPo battery for power supply. They are incredibly bright and can be seen in the brightest sunlight. The Bell uses eight lights for navigation, position, and strobes.




Click here or the individual thumbnails to below to see the conversion process.







MODEL DETAILS

Motor: Actro 32-3 outrunner

ESC: Castle Creations Ice 120 HV

Batteries: Two Thunder Power five-cell 3800 mAh 65C

Main blades: Spin 700 mm carbon fiber

Tail blades: Stock Miniature Aircraft Ion kit

Radio system: JR 9303 2.4 GHz

Servos: Cyclic JR 4735; tail rotor JR8900G

Receiver battery: JR 1500 mA Ni-Cd

Gyro/governor: JR G-770

Accessories: Retractable landing gear, lights

Modifications: Electric power conversion

Ready-to-fly weight: 13 pounds

Flight duration: 5 to 6 minutes




FULL-SCALE SPECIFICATIONS

Height: 11 feet, 8 inches

Fuselage length: 42 feet, 3 inches

Rotor diameter: 42 feet

Length overall: 50 feet, 3 inches

Engines: 700 hp

Maximum speed: 161 mph

Climb rate: 1,600 feet per minute

Service ceiling: 15,500 feet

Hover ceiling: 12,400 feet

Fuel capacity: 188 US gallons

Range: 434 miles

Empty weight: 5,097 pounds

Maximum takeoff weight: 8,400 pounds




SOURCES:

Miniature Aircraft USA

(406) 245-4883

www.miniatureaircraftusa.com



Castle Creations

(913) 390-6939

www.castlecreations.com



Thunder Power RC

(702) 228-8883

www.thunderpowerrc.com



JR Radios

(800) 338-4639

www.jrradios.com



Dreamworks Model Products LLC

(386) 852-4793

www.dreamworksrc.com



Graves RC

4814 North Orange Blossom Trail Orlando, FL 32810

(407) 294-5699










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5 comments

Thanks Bob for the once again great article. I have been reading your stuff since the eighties on the former Scale R/C mag.

Love the detail work. That is almost too beautiful to fly!

Bob brought his heli to the field this past summer and I was fortunate to have my camera with me at the time. It is a great model by a great model builder. You can see the flight at:
http://www.youtube.com/watch?v=2-pLo3sWzTM&list=UUuTBG728cLbiJ0y0sHe-nzQ...

I am about to purchase my first airbrush and desperately want to learn the art of masking and painting custom schemes; especially for static (non R/C) plastic scale commercial and general aviation aircraft models. Can you recommend a website where I might find tutorials on this kind of painting. I am a complete amateur modeler but want to learn to paint like you did on this helicopter. Awesome job, by the way. Thanks.

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