Quest Q-jet

AeroTech HDK-21 RMS-29/40-120 Hobby Delay Kit (3-Pack) - 43521

AeroTech HDK-21 RMS-29/40-120 Hobby Delay Kit (3-Pack) - 43521 - Main image
$8.12 $12.49 In stock

The AeroTech HDK-21 is for use with E16-7W (51607), F40-7W (64007) and G64-10W (76410) 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: 1.125 inches (29mm)

    Hardware Required: RMS-29/40-120

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

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

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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

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Customer Reviews (4.4 / 5 · 5 reviews)

Ruby ★★★★★

Finally a delay kit that doesn't leave me guessing; the included spacers let me fine-tune the ejection charge timing perfectly for my G64-10W motor. Exactly what I needed for consistent flights.

Isabella ★★★★★

Took these out for a club launch this weekend and the O-rings fit perfectly, giving me a clean seal every time. The three-pack is a solid value for getting consistent delays across different motor sizes.

Matthew ★★★★★

Swapped the stock delay out for the 7-second element in my F40 and the ejection timing was spot on. The kit comes with three delay elements plus the O-rings and spacers, so I'm set for a few more flights without reordering. Nice to have the exact parts matched to the motor instead of guessing.