Greencastle-Antrim School District proudly puts Children First, and that philosophy guides every decision and every action across the district. Our children represent the future of our community, and we work hard to live up to our mission to create and provide opportunities for all students to become lifelong learners and productive citizens.
The two types of high explosives are Primary explosives, which are easily ignited or detonated and are very sensitive to heat and friction, and Secondary explosives, which are usually much less sensitive to heat and friction and they typically have to be ignited through the use of other explosive materials.
All three plugs tested are cold enough at low speed to. experience fouling problems. The 86 and 82 test plugs also get hot enough to cause pre-ignition a high. speed. On this modern high output engine a spark plug that stays warm enough to prevent low speed fouling would. then easily cause pre-ignition at high speed. Or alternatively, a plug which stays below the pre-ignition.