DESCRIPTION |
FEATURES |
SPECIFICATIONS |
DOCUMENTS |
VIDEO |
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DESCRIPTION
The **Champion RHM40E** is a **massive‑electrode, two‑prong spark plug** built for aviation use.
It features a shielded barrel (3/4‑20) thread and durable electrode construction, delivering consistent ignition performance under demanding conditions.
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## Applications
- Ideal for **general aviation piston engines** requiring massive electrode plugs
- Common in **vintage and light aircraft** using 3/4‑20 shielded barrel threads
- Trusted in classic models including early **Cessna**, **Piper**, and **Rearwin** aircraft
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## Why CJ Aerospace?
CJ Aerospace supplies trusted ignition and engine components for aviation operations.
We provide fast delivery, technical support, and quality parts trusted by aviation professionals.
- 🇦🇺 **Australian‑owned & operated**
- 📦 **Stocked locally in Australia for rapid dispatch**
- 🔧 **OEM‑quality ignition components**
- 🛠️ **Preferred by leading MROs and operators**
> ✉️ [Contact us sales@cjaerospace.com.au](mailto:sales@cjaerospace.com.au)
> Need help with fitment or compatibility? Our expert team is here to assist.
FEATURES
- **Two‑prong massive electrode design** for strong spark and easy maintenance
- **Nickel alloy electrodes** for durability and heat resistance
- **Shielded 3/4‑20 barrel thread** for EMI protection and secure ignition lead fit
- **Fired glass insulator seal** ensures gas-tight performance under vibration
- **Corrosion-resistant finish** with nickel plating and high-temp epoxy coating
- **Plated threads** to reduce galling during installation and removal
SPECIFICATIONS
Package Dimensions
| Length | 2.2 cm |
| Height | cm |
| Width | cm |
| Weight | 127 g |
Details
| **Specification** | **Detail** |
|-----------------------------|-----------------------------------------------------------------------------|
| **Part Number** | RHM40E |
| **Type** | Massive Electrode (two‑prong) |
| **Compatible Engines** | Continental C90, O‑470; Lycoming early models; Jacobs radial engines; Pratt & Whitney; Wright radial engines; Kenroyce‑Rearwin models |
| **Compatible Aircraft** | Cessna J3, J4, J5; Piper Cub, PA‑11, PA‑17; Rearwin aircraft; other vintage & light GA aircraft |
| **Thread Size** | 3/4‑20 (shielded barrel thread) |
| **Mounting Thread / Size** | 18 mm |
| **Reach** | 1/2 inch (12.7 mm) |
| **Sealing Method** | Fired glass insulator seal |
| **Electrode Material** | Nickel alloy |
| **Finish / Coating** | Nickel plating + high-temperature epoxy coating |
| **Typical Gap** | 0.016″ – 0.021″ (0.41 – 0.53 mm) |
| **Packaging** | Sold individually |
| **Certifications** | FAA-approved, certified for aviation use |
| **Manufacturer** | Champion Aerospace |
BROCHURES & DOCUMENTATIONS
List of Brochures
Champion Aerospace Spark Plug Chart
List of Documentation
VIDEO
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