GREAT PLANES HeadWind "B" Gebrauchsanweisung - Seite 3

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are over 2,500 AMA chartered clubs across the country.

Among other benefits, the AMA provides insurance to its

members who fly at sanctioned sites and events. Additionally,

training programs and instructors are available at AMA club

sites to help you get started the right way. Contact the AMA at

the address or toll-free phone number below:

Academy of Model Aeronautics

Or via the Internet at: http://www.modelaircraft.org

ADDITIONAL ITEMS REQUIRED

This is the list of hardware and accessories required to finish

the Headwind B. Order numbers are provided in parentheses.

Radio Equipment

The Headwind B requires a micro receiver and two micro

servos. Futaba

S3103 (FUTM0037) or Hobbico

(HCAM0090) micro servos are suitable.

Speed Control

An electronic speed control with BEC (Battery Eliminator

Circuitry) is required. The BEC allows both the motor and

the radio system to be powered by the same battery (thus

eliminating an additional battery typically required to power

the radio). The Great Planes ElectriFly

Frequency Electronic Speed Control (GPMM2000) is

recommended for the Headwind B. If you purchase the

complete motor and gear drive system, the speed control is

included (refer to the "Motor System" section that follows).

Motor System

The Headwind B is designed to use the Great Planes

ElectriFly T-280GD ESC motor system and gear drive for

electric flight (GPMG0430). This system includes a T-280

Ferrite Motor, S-280 4.1:1 ratio gearbox, 3mm prop adapter,

APC 10 x 4.7 propeller and the ElectriFly C-5 Nano High

Frequency Electronic Speed Control w/BEC. The same

components are also available without the speed control by

ordering number GPMG0445.

Battery Recommendations

There are mainly two kinds of battery packs used for electric

R/C models; nickel-metal hydride (NiMh) packs and nickel-

5151 East Memorial Drive

Muncie, IN 47302-9252

Tele. (800) 435-9262

Fax (765) 741-0057

™

C-5 Nano

cadmium (NiCd, pronounced ny-cad) packs. NiMh batteries

are recommended for the Headwind B because they provide

nearly twice the capacity of a NiCd for their size. However, it

should be noted that nickel-metal hydrides cannot be

charged as fast as NiCds.

Each individual cell that makes up a battery is 1.2 volts.

Simply stated, a volt is the amount of power a battery pack

can deliver (a 6-cell battery pack is 7.2 volts). Batteries are

also rated by their capacity in mAh (milli-Amp-hours), or how

much energy they store. A 550 mAh battery can supply 1

Ampere for .55 hours (about 30 minutes). A 1200 mAh battery

pack is about twice the size of a 550 mAh battery pack.

These are the battery packs recommended

•

Panasonic 6-cell 550 mAh NiMh pack (GPMP0100) for

beginners due to its light weight.

•

Panasonic 7-cell 550 mAh NiMh pack (GPMP0101) for

advanced pilots who are capable of flying in slightly

windier conditions.

•

Panasonic 7-cell 1200 mAh NiMh (GPMP0300) for

advanced pilots requiring the longest duration (not

CS-5

recommended for beginners due to the fact that it is heavier

than the 550 mAh batteries).

Note: If flying the Headwind B at altitudes of 3,000 feet

above sea level or higher, beginners should select the 7-cell

550 mAh battery pack, as the 6-cell pack may not provide

adequate power.

™

High

The best type of charger to use is a peak charger, because

it charges the batteries until they are fully charged, then

automatically switches to a trickle charge mode. The Great

Planes ElectriFly Peak Charger (GPMM3000) is suitable

for nickel-metal hydride batteries, NiCds and transmitter

battery packs.

If you have another type of charger that is not a peak charger,

you will have to calculate the length of time it takes to charge

the batteries yourself, then turn the charger off when the

batteries are fully charged. Overcharging the batteries may

damage them. Before you can calculate the time it takes to

charge a battery pack, you first have to know the charge rate

you are going to use. Nickel-metal hydrides must be charged

at a rate of no more than 1/10 of their capacity. For the 550

mAh batteries recommended for the Headwind B this would

be a charge rate of approximately 50 mAh. Divide the

capacity of the battery pack by the charge rate to calculate

the charge time. A discharged 550 mAh battery pack

charged at 50 mAh will take 11 hours to charge.

for the Headwind B: