NAR HPR Ignition Systems & Launch Controllers 2

Question 1

What is the typical resistance range for a properly installed high-power motor igniter as measured during a continuity check?

Accepted Answer

0.5 to 2.0 ohms

Answer

0.001 to 0.01 ohms

Answer

10 to 100 ohms

Answer

500 to 1000 ohms

Question 2

What should a flyer do if the continuity check shows an open circuit (no continuity reading)?

Accepted Answer

Do not arm or launch; investigate and correct the problem before proceeding

Answer

Increase the launch controller battery voltage and retry the check

Answer

Immediately press the launch button to attempt to clear the fault

Answer

Proceed with launch since most motors will fire without confirmed continuity

Question 3

Which type of igniter is specifically designed and recommended for use with composite propellant high-power motors?

Accepted Answer

Copperhead or similar composite-compatible pyrotechnic igniter

Answer

Standard Estes solar igniter

Answer

Thermalite safety fuse

Answer

Standard electric match (e-match) used for black powder only

Question 4

What is the purpose of having the RSO oversee or control the arming step of the launch controller?

Accepted Answer

To ensure proper oversight and prevent premature or unauthorized arming

Answer

To verify the flyer's certification level matches the motor class

Answer

To test the launch controller battery before the flyer uses it

Answer

To comply with FCC radio frequency regulations at the launch site

Question 5

What determines the required minimum length of launch lead cables connecting the controller to the igniter?

Accepted Answer

The length that places all personnel outside the minimum safe distance for the motor class being used

Answer

Exactly 15 feet per NAR standard for all motor classes

Answer

The length of the launch rail plus five additional feet

Answer

Exactly 25 feet as specified in the NAR High Power Safety Code

Question 6

What is the function of the 'safe' position on a launch controller's arm/safe toggle switch?

Accepted Answer

It interrupts the firing circuit so the launch button cannot complete ignition

Answer

It disconnects the battery completely from the launch controller

Answer

It signals the RSO that the controller is ready for arming

Answer

It engages the internal continuity check mode

Question 7

What does 'all-fire current' mean for a pyrotechnic igniter?

Accepted Answer

The minimum current guaranteed to reliably fire the igniter

Answer

The current required to complete a successful continuity check

Answer

The maximum current the igniter can safely conduct without damage

Answer

The current level that causes the igniter to fail open without firing