MegaTech R/C Real World Helicopter Series Manuale Utente Scaricare il pdf (Pagina 72)

AT MODEL AIRPLANE NEWS, we not only tell you what's new, but we also try it out first so we

can bring you mini-reviews of the stuff we like best. We're constantly being sent the latest support equipment

manufacturers have to offer. If we think a product is good—something special that will make your modeling

experiences a little easier or just plain more fun—we'll let you know here. From retracts and hinges to glow

starters and videotapes, look for it in "Product Watch."

MatchBox

Servo matching and

power distribution

Intended for modelers of giant-scale craft and others who want to use

multiple servos on a single channel, the new JR MatchBox is an

onboard electronic device that precisely matches servos used on a

single channel. Digital servos give modelers a new level of control pre-

cision, but slight variables in control-linkage geometry still

remain—especially when more than one servo is attached to a single

control surface. Examples of this are giant-scale, TOC-style aerobatic

airplanes that use three servos per aileron and two servos per eleva-

tor half. The slightest mismatch between these grouped servos can

cause increased current drain as the servos fight each other. Now,

however, there is an easy solution to this problem. The MatchBox

allows modelers to match servos with precision and offers servo-

setting flexibility. Weighing just over 0.33 ounce, the unit is about the

same size as a small receiver and can be plugged into any channel

that drives more than one servo. Up to four servos can then be

plugged into it and, using the selector dial and buttons, the servos can

be independently adjusted. The unit allows adjustments to neutral

point (subtrim), endpoint and direction reversing.

A big plus is that the MatchBox also lets you power the servos with

a separate auxiliary battery pack! This is highly recommended if you

are driving three or four high-current servos. You do have to use a

switch harness for the second battery pack to switch off the power to

the unit. A power shunt is also included and is plugged into the battery

port if an auxiliary battery pack is not used.

The MatchBox can also be used in a Y-harness configuration

where the servos on a single channel are used for various

applications. An example is split elevator halves, with a

servo used to move each half. Each servo's endpoint

can be adjusted and, if needed, one of the servos

can be reversed to give the proper elevator

input. Typically, this kind of setup flexibility

is only offered with a programmable

computer radio.

The MatchBox is very easy to

use. The selector dial has 10

positions (0 through 9).

Positions 1 through 8 corre-

spond to the numbered servo

plug-in slots on the opposite

end of the unit. To select a servo

and adjust it, you simply turn the

selector to the corresponding posi-

tion number and then push either the

Increase (+) or Decrease (-) buttons to

make the desired adjustment.

• Position 0 is the default position to

which the unit should be turned for normal

operation. Any adjustments that are made are

stored in memory when the dial is returned to

0. This must be done before the airborne system

has been shut off. If power is turned off before the dial is set at 0, the

settings will be lost.

• Selecting any dial positions from 1 to 4 allows the modeler to make

servo neutral point and endpoint adjustments to the servos using a

combination of transmitter stick positions and the Increase or

Decrease buttons. With the control stick in the neutral position, you

can adjust the neutral point of the selected servo, and with the stick

in the extreme left or right position, the endpoints can be adjusted.

• Selecting positions 5 to 8 allows servo-reversing. As before, these

adjustments are made using the transmitter stick position (neutral)

and the buttons.

You can reset the MatchBox to the factory default settings by turn-

ing the selector to position 9 and then simultaneously pressing the

Increase and Decrease buttons.

The MatchBox comes with detailed instructions, a short wire lead to

connect to the receiver and a battery power shunt. If you would like to

add a greater degree of servo adjustment to your next model, for

$69.99, the JR MatchBox is a handy little device to have around. I've

used it, and I like it! I think you'll like using it, too. —Gerry Vanish

JR; distributed by Horizon Hobby Inc., 4105 Fieldstone Rd., Champaign,

IL 61822; (800) 338-4639;

www.horizonhobby.com.

124 MODEL AIRPLANE NEWS

1 2 ... 67 68 69 70 71 72 73 74 75

Commenti su questo manuale

Nessun commento

MegaTech R/C Real World Helicopter Series Manuale Utente Pagina 72

Commenti su questo manuale

Prodotti e manuali riguardandi Giocattoli radiocomandati MegaTech R/C Real World Helicopter Series