Quest Q-jet

AeroTech HDK-03 RMS-18/20 Hobby Delay Kit (3-Pack) - 43503

AeroTech HDK-03 RMS-18/20 Hobby Delay Kit (3-Pack) - 43503 - Main image
$8.24 $12.49 In stock

The AeroTech HDK-03 is for use with D13-4W (41304) motors. The motor hobby delay kit comes with 3 rocket delay elements and spacers. Motor delay O-rings, delay insulators and other parts are supplied with the RMS reload kits. Note that Hobby Delay Kits and High Power Delay Kits are not interchangeable.

This AeroTech kit is U.S. mailable with no hazmat fee! The sale of this high power motor to persons under 18 years of age is currently prohibited by federal law. Orders containing this item will not be shipped until proof of age (such as a copy of a driver's license) is received.

Certified by the Tripoli Rocketry Association (TRA), the National Association of Rocketry (NAR) and the Canadian Association of Rocketry (CAR).

  • Specifications:

    Motor Diameter: 0.70 inches (18mm)

    Hardware Required: RMS-18/20

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 4 reviews)

Natalie C. ★★★★★

The O-rings seated perfectly on my D13-4W motor, no leaks at all. These spacers let me dial in the exact delay time I needed for a perfect flight. Solid kit.

Jacob D. ★★★★★

Packed all three delay elements into a single afternoon build session, and the spacers made fine-tuning the ejection timing a breeze. The included O-rings sealed up snugly against the motor tube—no leaks on the first two flights.

Leo D. ★★★★★

Used the full three-pack on a single build session and the precision of the delay elements made installation a breeze. The included O-rings and insulators meant I didn’t have to hunt for spare parts mid-assembly.