Here is a concise summary of the "Super Slow Show" episode:
**Title:** Writing Names with Det Cord in Slow Motion
**Hosts:** Gav and Dan (Slow Mo Guys)
**Experiment:**
1. **Det Cord Basics**: Explained detonating cord (det cord) properties: a plastic explosive-filled sheath, not sensitive to physical damage, requiring a detonator.
2. **Writing Names**:
* Wrote their names using 48 grain det cord (Gav) and 100 grain det cord (Dan) for thicker letters.
* Captured explosions at **28,000 frames per second (fps)** and later at **90,000 fps** for enhanced slow-motion effect.
3. **Water Trough Experiment**: Det cord was set off under a water puddle to demonstrate its speed, creating a brief, explosion-like effect under the water's surface.
**Key Observations:**
* Det cord detonates at approximately **6,000 meters per second**.
* Slow-motion footage reveals detailed shockwaves and air pressure effects.
* Comparison with **1,000 fps** footage highlights the importance of high frame rates in capturing the full effect.
**Tone:** Light-hearted, humorous, and entertaining, with a focus on showcasing the fascinating effects of high-speed explosions in slow motion.
Here are the key facts extracted from the text, without opinions, with each fact numbered and in short sentences:
1. **Hosts' Names**: The hosts' names are Gav and Dan.
2. **Show Name**: The show is called the "Super Slow Show" (also referred to as the "Slow Mo Guys").
3. **Det Cord Basics**: Det cord, or detonating cord, detonates at approximately 6,000 meters per second.
4. **Det Cord Composition**: Det cord has a sheath with plastic explosives in the center.
5. **Det Cord Sensitivity**: Det cord is not very sensitive and requires a detonator to explode.
6. **Detonation Initiation**: The det cord is electrically initiated through cables.
7. **Camera Equipment**:
* **V2511**: Used to film at 28,000 frames per second (later increased to 90,000 frames per second).
* **Flex4K**: Used to film at 1,000 frames per second for comparison.
8. **Det Cord Grain and Effect**:
* **48 Grain Det Cord**: Used initially, resulting in "skinny" letters.
* **100 Grain Det Cord**: Used later, resulting in "fatter" letters due to more plastic explosives.
9. **Experiment Setup**:
* **Initial Experiment**: Writing names with det cord.
* **Water Trough Experiment**: Det cord set up to explode through a puddle of water.
10. **Physical Effects Observed**:
* **Shockwaves**: Visible in slow motion, affecting the surrounding environment.
* **Water Displacement**: Water reacts slowly compared to the speed of the det cord.
* **Cavitation/Lack of Air**: Created momentarily in the water where the det cord exploded.
11. **Measurement**:
* **Water Height**: Reached about 30 feet in the water trough experiment.