Ajuda nas especificações. o Futaba 3305 todos jah conhecem , segue as especificações do Hitec
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXUZ76

FEATURES: EPA, Speed, Direction, and Fail-Safe Programmable (see COMMENTS).
MOSFET amplifier.
Gold plated contacts.
Three metal gears
Dual ball bearings.
Indirect drive long life potentiometer.
High standing torque.
Watertight and dustproof.
Includes blue aluminum, heat-treated servo arm (see COMMENTS).
Works with fixed winged aircraft and helicopters up to 40 pounds,
1/10th and 1/8th on- or off-road vehicles.
INCLUDES: One digital high torque servo with 12" wire and S/JR/Air-Z connector
One white small X-shaped servo horn.
One red Large X-shaped servo horn.
One white adjustable servo horn.
One white off-set straight servo horn.
One white disc servo horn.
One blue aluminum, heat-treated servo arm horn.
Four 2 x 14mm mounting screws
Four brass eyelets
Four black rubber vibration isolators.
REQUIRES: Hitec, JR and Airtronics-Z radio system
SPECS: Speed: 0.17 sec/60° at 4.8V
Speed: 0.14 sec/60° at 6.0V
Torque: 109.7 oz-in at 4.8V
Torque: 130.53 oz-in at 6.0V
Length: 1.59" (40.6mm)
Width: 0.77" (19.8mm)
Height: 1.48" (37.8mm)
Weight: 2.11oz (60g)