NAR Section #473

Mid-Power Rocketry F and G motors ( and sometimes E) powered models

Mid-power rocketry is often the next step for many club members who are seeking to expand their rocketry skills. This class of rockets often involves the use of reloadable motors, switching from launch lugs to rail buttons, and may include the use of electronics to assist in recovery. ( Altimeters for dual deployment, Chute release mechanisms, etc.)

Because of their size and power, Mid-Power rockets are usually launched from pads equipped with either micro or 10/10 rails, though ¼” launch rods are used on occasion. These types of rods and rails also require larger launch pads. The club has three of these types of pads( Two yellow and one blue) which can be found on the field just past the low power rack. These pads are adjusted using hex bolts. The bolts require the use of a hex wrench to loosen and tighten. Because of the weight of Mid-power rockets AND the weight and length of the rails and rods, it is important that the hex bolts be tightened as much as possible after the model is positioned for take-off. Hex wrenches can be found near each pad with extras being located near the spider box.

The Mid-Power pad area is also equipped with a wireless spider box with cables extending outwards to each of the pads. One cable is laid out per pad. Because these cables are not attached to the pads like with the Low Power rack, it is possible to mix up them up. Please make sure you have the correct number cable for your pad before attaching the ignitor clips to your model’s ignitor.

One other feature the spider box has, is that you can check continuity of your ignitor connection before you leave the pad area. The spider box has several black buttons on the top, each corresponding to an ignitor cable lead. To check continuity, depress the button that matches the leads going to your pad. You want to hear a clear, high pitched tone. If there is no tone or the tone is grabbled or intermittent, you’ll need to check your connection at the pad or replace your ignitor.

Note: If the installed Impulse of your model’s motors exceeds the Mid-Power pad’s safety limit or you need to use a larger/longer rail, you may be assigned a pad in the High Power area. The RSO will let you know or help you arrange to use those pads.

Mid-Power Pad ( Note the hex bolts)

Mid-Power Spider Box