Apogee Apprentice 5039 Посібник - Сторінка 6

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Launching the Apprentice Rocket Kit

The motor matrix shown here was de-

veloped using the RockSim software (www.

RockSim.com). Initial conditions: slightly

breezy (3-7mph wind), straight up launch

angle. You can use RockSim to find other mo-

tor combinations that will work well in the Ap-

prentice rocket kit. Download the RockSim file

for this kit and a free trial-version of RockSim

at: www.ApogeeRockets.com/Apprentice.asp

Launch Supplies Needed

To launch your rocket you will need the follow-

ing supplies:

u A model rocket launching system.

u Flame resistant recovery wadding.

u Recommended 18mm diameter Rocket

Engines — see the motor selection chart.

Rocket Preflight

A. Loosely crumple and insert 3 sheets of

recovery wadding into the body tube.

B. Carefully fold the parachute using the

instructions on page 5 and insert it into the

tube with the shock cord.

C. Insert the motor into the motor tube until

the motor hook holds it in place.

D. Insert and secure the engine igniter as

directed on the package the engines came

with.

Countdown and Launch Procedure

Fly your rocket on a large field that isn't near

any power lines, trees, or low flying aircraft.

The larger the field, the greater your chances

of recovering your rocket. The launch area

around the pad must be free of dry weeds and

brown grass. Launch only during calm weather

with very little or no wind and good visibility.

Always use a launch pad that includes a blast

deflector.

10. Remove the safety key from the launch

controller

9. Slide the launch lug over the launch rod to

place the rocket on the pad. The rocket

should slide freely over the rod.

8. Attach the micro-clips to the igniter. The

clips must not touch each other or the

metal blast deflector.

7. Stand back from your rocket as far as the

launch wire allows (at least 5 meters - 15

feet).

6. Insert the safety key to arm the launch sys-

tem. The light (or buzzer) on the controller

Page

Motor Selection Chart: How High Will The Apprentice Fly?

Motor

Produced

Type

by:

A8-3

Estes

A6-4

Quest

B4-4

Estes

B6-4

Estes or Quest

C6-5

Estes or Quest

D10-7

Aerotech

3 sheets of flame-proof

recovery wadding

should come on.

Give a loud countdown 5 ... 4 ... 3 ... 2 ... 1 ... LAUNCH!

Push and hold the button until the engine ignites. Then remove the safety

key and place the safety cap on the launch rod.

Misfire Procedure

Occasionally the igniter will burn, but the motor will fail to ignite. If this hap-

pens, the cause is that the pyrogen on the igniter was not in contact with

the engines propellant. When an ignition failure occurs, remove the safety

key from the launch controller and wait 60 seconds before approaching the

rocket. Remove the old igniter from the engine and install a new one. Make

sure that the igniter is insert fully into the engine and touches the propel-

lant. Secure the igniter as directed on the engine package and repeat the

countdown and launch procedure.

Always follow the NAR* Model Rocket Safety Code when launching model

rockets.

*National Association of Rocketry

**Kevlar

is a brand name of E.I. DuPont for their selection of aramid fibers. Only DuPont

makes Kevlar

Estimated Altitude

(feet)

242.5 ft

215.6 ft

621.4 ft

660.0 ft

1532.6 ft

2887.6 ft

Folded Parachute

(meters)

73.9 m

65.7 m

189.4 m

201.1 m

467.1 m

880.1 m