High Power Model Rocketry

Door Knob

Door Knob - Main image
$178.92 $275.26 In stock

Now part of the LOC Custom series of rocket launch kits, which feature factory pre-slotted airframe and through-the-wall fin construction and high power motor capabilities, the DOORKNOB is a great vehicle to make your Level 2 certification flight with on a small field. The included removable nose weight system (RNWS) let you keep it stable with versatility. Now with LOC-N-FIN technology and the MMAS (Modular Motor Adapter System) for easy building, the DOORKNOB is a light weight large diameter kit with presence.

DESCRIPTION

Door Knob 7.5" rocket kit.  Now equipped with the MMAS system and RNWS.  No more "fin keepers". Optional bulkhead included. Most tend to epoxy the coupler to the 12" payload to make a 42" 1-piece airframe and eject the cone.

Complexity: Advanced
Diameter: 7.5″
Height: 63.5"
Weight: 13lbs
Motor Mount: 5.5" MMAS includes 54MM Adaptor
Parachute Size: 78″ Ripstop Nylon **Colors are random**
Shock Cord Type: 1"x4' Y Harness, TN-25 Tubular Nylon with sewn loops
Shock Cord Mount: SCM-4 U Bolts
Motor Retention: MR-1
Launch Configuration: 1500 series rail guides
Fin Thickness: 3/8″
Ring Thickness: 1/4″
Instructions: MMAS instructions only.  LOC Custom kit = Advanced users have their own flavor of builds.
Decals: Yes - Door Knob Logo

 Door Knob Rocksim File

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 (4.6 / 5 · 5 reviews)

Penelope ★★★★★

The pre-slotted airframe made assembly so much easier than my last scratch-built rocket. The through-the-wall fin construction feels incredibly solid, giving me real confidence for a high-power motor flight.

Nicholas J. ★★★★★

I was pleasantly surprised by how sturdy the pre-slotted airframe feels during assembly. The through-the-wall fin construction gave me confidence in its durability for a high power launch. It went together cleanly and flew perfectly on its first flight.

Victoria O. ★★★★★

The through-the-wall fin construction is way sturdier than the surface-mounted fins on my last kit, and it handled a high power motor without any wobble. I was honestly nervous about the build, but the fins locked in square on the first try.