Door Knob

(1 customer review)



Now part of the Loc Custom series of kits, which feature factory pre-slotted airframe and through-the-wall fin construction and high power motor capabilities, the DOORKNOB is a great new vehicle to make your Level 1 and Level 2 certification flight with on a small field. 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. Parachute Recovery.

All LOC/PRECISION “PK-XX” kits include heavy duty airframe and motor mount tubes, high-grade precision-cut plywood fins, centering rings, rip-stop nylon parachute or streamer, nylon elastic shock cord and mount, launch lug, polypropolene nose cones and instructions.


Door Knob 7.5″ rocket kit.  Now equipped with the MMAS system.  No more “fin keepers”. And RNWS to balance out the motor of your choice!

Additional information

Weight 17 lbs
Dimensions 31 × 16 × 9 in

Complete Decal Sheet, No Decal

1 review for Door Knob

  1. frank.thompson.iv (verified owner)

    I purchased this rocket to use for a small field L2 certification flight, and it was perfect.

    The kit is by far the largest I’ve built and the experience was wonderful. The laser cut plywood parts were made from excellent quality wood, and the fit was perfect after sanding just enough to remove the laser burn marks from the edges. This kit appears to be updated some older build threads found on the internet from >5 years ago. This kit includes some really cool features including the MMAS (multiple motor adapter system) and the RNWS (removable nose weight system). The kit includes instructions for these two new features which I needed since I didn’t have experience with anything like this before. The instructions make it very easy to assemble these features on the rocket. Note that the kit includes the mount for a 54mm motor. If flying a different size motor, just by the MMAS adapter for the size you want. The MMAS adapter just slides in the back and is retained with 4 screws. It is very slick and easy to change.

    I built mine fairly heavy including lots of epoxy on the fin can (built the fin can outside the rocket then installed it into the airframe) and fiberglassed airframe tubes. I also purchased an extra length of 7.5″ coupler tube to allow doubling the airframe the entire length of the rocket (from upper motor mount ring to nose cone shoulder). Flight weight came in at 17.2 pounds and I hit 741 feet with a J350W. It was plenty of height for a complete recovery system deployment and very clearly visible the whole flight. The included LOC 78″ chute lowered my heavily built rocket onto the field with no damage. I did use a chute release on this chute to delay opening until 500 feet (didn’t have to wait long) and it worked nicely even on this large chute.

    I really enjoyed building this kit and highly recommend it if you’re looking for something to use for an L2 cert on a small field.

Only logged in customers who have purchased this product may leave a review.