Manual Spektrum DX8 (page 36 of 42) (English)

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



Servo Precautions

•Donotlubricateservogearsormotors.

•Donotoverloadretractservosduringretractedorextendedconditions.Make

sure they are able to travel their full deﬂection. Overloading or stalling a servo can

cause excessive current drain.

•Makesureallservosmovefreelythroughtheirrotationsandnolinkages

hang up or bind. A binding control linkage can cause a servo to draw excessive

current. A stalled servo can drain a battery pack in a matter of minutes.

•Correctanycontrolsurface“buzz”or“utter”assoonasitisnoticedinight,

as this condition

can destroy the feedback potentiometer in the servo. It may be extremely

dangerous to ignore such “buzz” or “ﬂutter.”

•Usethesuppliedrubbergrommetsandbrassservoeyeletswhenmounting

your servos. Do not over-tighten the servo mounting screws, as this negates the

dampening effect of the rubber grommets.

•Ensuretheservohornissecurelyfastenedtotheservo.Useonlytheservoarm

screws provided; the size is different from other manufacturers.

•Discontinuetouseservoarmswhentheybecome“yellowed”ordiscolored.

Such servo arms may be brittle and can snap at any time, possibly causing the

aircraft to crash.

•Checkallrelatedmountingscrewsandlinkagesfrequently.Aircraftoften

vibrate, causing linkages and screws to loosen.

General Notes

Radio controlled models are a great source of pleasure. Unfortunately, they can

also pose a potential hazard if not operated and maintained properly.

It is imperative to install your radio control system correctly. Additionally, your

level of piloting competency must be high enough to ensure that you are able

to control your aircraft under all conditions. If you are a newcomer to radio

controlled ﬂying, please seek help from an experienced pilot or your local hobby

store.

Safety, Precautions, and Warnings

As the user of this product, you are solely responsible for operating it in a manner

that does not endanger yourself and others or result in damage to the product or

the property of others.

Carefully follow the directions and warnings for this and any optional support

equipment (chargers, rechargeable battery packs, etc.) that you use.

This model is controlled by a radio signal that is subject to interference from

many sources outside your control. This interference can cause momentary

loss of control so it is necessary to always keep a safe distance in all directions

around your model, as this margin will help to avoid collisions or injury.

•Alwaysoperateyourmodelinanopenareaawayfromcars,trafc,orpeople.

•Avoidoperatingyourmodelinthestreetwhereinjuryordamagecanoccur.

•Neveroperatethemodeloutintothestreetorpopulatedareasforanyreason.

•Neveroperateyourmodelwithlowtransmitterbatteries.

•Carefullyfollowthedirectionsandwarningsforthisandanyoptionalsupport

equipment (chargers, rechargeable battery packs, etc.) that you use.

•Keepallchemicals,smallpartsandanythingelectricaloutofthereachof

children.

•Moisturecausesdamagetoelectronics.Avoidwaterexposuretoallequipment

not speciﬁcally designed and protected for this purpose.

Do not operate more than 40 DSM transmitters simultaneously.

Safety Do’s and Don’ts for Pilots

•Ensurethatyourbatterieshavebeenproperlychargedpriortoyourinitialight.

•Keeptrackofthetimethesystemisturnedonsoyouwillknowhowlongyou

can safely operateyour system.

•Performagroundrangecheckpriortotheinitialightoftheday.Seethe“Daily

Flight Checks Section” for information.

•Checkallcontrolsurfacespriortoeachtakeoff.

•Donotyyourmodelnearspectators,parkingareasoranyotherareathat

could result in injury to people or damage of property.

•Donotyduringadverseweatherconditions.Poorvisibilitycancause

disorientation and loss of control of your aircraft. Strong winds can cause similar

problems.

•Donotpointthetransmitterantennadirectlytowardthemodel.Theradiation

pattern from the tip of the antenna is inherently low.

•Donottakechances.Ifatanytimeduringightyouobserveanyerraticor

abnormal operation, land immediately and do not resume ﬂight until the cause of

the problem has been ascertained and corrected. Safety can never be taken lightly.

Federal Aviation Administration

Purpose

This advisory outlines safety standards for operations of model aircraft. We

encourage voluntary compliance with these standards.



Attention has been drawn to the increase in model aircraft operation. There is a

need for added caution when operating free ﬂight and radio controlled craft in

order to avoid creating a noise nuisance or a potential hazard to full-scale aircraft

and persons and/or property on the surface.



Modelers generally are concerned with safety and exercise good judgment

when ﬂying model aircraft. However, in the interest of safer skies, we encourage

operators of radio controlled and free ﬂight models to comply with the following

standards:

a. Exercise vigilance in locating full-scale aircraft (get help if possible) so as not

to create a collision hazard.

b. Select an operating site at sufﬁcient distance from populated areas so you do

not create a noise problem or a potential hazard.

c. Do not ﬂy higher than 400 feet above the surface.

d. Always operate more than three miles from the boundary of an airport unless

you are given permission to be closer by the appropriate air trafﬁc control facility

in the case of an airport for which a control zone has been designated or by the

airport manager in the case of other airports.

e. Do not hesitate to ask for assistance in complying with these guidelines at the

airport trafﬁc control tower or air route trafﬁc control center nearest the site of

your proposed operation.



Director, Air Trafﬁc Service Federal Aviation Administration, Washington, D.C.

Daily Flight Checks

1. Check the battery voltage on both the transmitter and the receiver battery

packs. Do not ﬂy below 4.3V on the transmitter or below 9V on the receiver. To do

so can crash your aircraft.

Note: When you check these batteries, ensure that you have the polarities correct

on your expanded scale voltmeter.

2. Check all hardware (linkages, screws, nuts, and bolts) prior to each day’s ﬂight.

Be sure that binding does not occur and that all parts are properly secured.

3. Ensure that all surfaces are moving in the proper manner.

4. Perform a ground range check before each day’s ﬂying session.

5. Prior to starting your aircraft, turn off your transmitter, then turn it back on. Do

this each time you start your aircraft. If any critical switches are on without your

knowledge, the transmitter alarm will warn you at this time.

6. Check that all trim levers are in the proper location.

7. All servo pigtails and switch harness plugs should be secured in the receiver.

Make sure that the switch harness moves freely in both directions.

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