The Estes Standard to D Engine Adapters make it easy to expand your flying options by allowing you to use standard size engines in rockets designed for D engine mounts. With just two simple steps, you can insert a standard engine into the adapter and then place the adapter into your rocket for a perfect fit.

Each pack includes three reusable adapters, making them a cost-effective solution for maximizing your fleet’s versatility. Whether you’re looking to test different flight profiles or enjoy more accessible launches, these adapters give you greater flexibility in your rocketry experience.

• Simple Conversion: Quickly adapt rockets with D engine mounts to fly with standard engines.
• Reusable Design: Durable construction allows you to use the adapters multiple times.
• Three-Pack Value: Includes three adapters for plenty of launches.
• Compatible with Estes Hooks: Tested to work with Estes brand metal engine hooks.
• Lightweight Rockets: Fly rockets up to 4 ounces on B and C engines that normally require C11 or D12 power.