Найк Дым Экстрим! - Модель Ракеты

Update 6/5/2024: I have updated the Nosecone. The original appears to be an early version and while printing, it broke easily at the shoulder. The new one should work much better. I also modified the z-axis height so now it sits at 221.5mm and should work with most smaller bed-slingers. I have removed the original one as it is totally useless.

My apologies for the nosecone SNAFU.

Введение:

The Extreme Series of Builders Kits were designed to print, assemble, and fly easily. These rockets can be flown on lower-powered motors in a park, or with higher-powered 24/29mm motors. Typically, an Estes F15 can loft these rockets to over 1000 ft, thus the name Extreme.

The construction is simple. The fin can is solid plastic with cut-outs for the fins to be joined using epoxy. I have included a one-piece fincan with the fins attached. The inside diameter of the fin can is designed to be lined with a 29mm motor tube. Between this tube and the fin can is a small channel for a piece of kevlar kite string (~1mm thick). This should also be epoxied in.

The motor retention ring will slip onto the end of the motor tube and be glued with epoxy. The nose cone can be flown in two configurations, with the electronics sled or with the plug. Both are identical except the plug does not incorporate the sled. They will accept a ¼-20 eye-bolt. Both include two holes for venting altimeters and routing e-matches for electronic deployment.

Also included is a detailed OpenRocket simulation file with potential motors that should work. You will want to download the accessories pack found HERE. All of these parts will work interchangeably with the BT60 Extreme Builder's kits and are sized around Estes's standard BT60 body tubes.

If you print and enjoy this model, please consider clicking the LIKE (Heart) button and posting a Make. It really helps me and I would love to see other models made from this.

Модели в комплекте:

Nosecone
Fincan with Slots for fins
Fin (print 4x) — These were inspired by CWBULLET's Nike Smoke Fins
Optional one-piece Fincan — Requires support
OpenRocket Simulation File (WIP)

Accessories (found Here):

Electronics bay Sled
Nosecone Plug
Motor Retainer ring and cap
Труборез BT60
1010 Rail Guides and Buttons — Choose your preference
¼-in Launch Lugs — Short and Long

Необходимые материалы:

BT60 Estes Body Tubing
Approximately 6 ft or 1800mm of Kevlar shock cord — approx 1mm diameter. I use Emma Kite String made of Kevlar from Amazon
29mm Motor Mount tubing (MMT) — I use LOC tubes but Estes or Apogee will work too
15 (or more)-minute epoxy
¼-20 eye-bolt (or two) for the sled/plug
18in parachute and wadding or fire blankie

Руководство по строительству:

Before starting, read this. If it's not clear, send me a message. I am happy to answer any questions.

Optional: For the one-piece fin can, please consider adding a fillet to the fins to increase strength and aerodynamics.

Starting with the fin can, your motor tube (MMT) should be as long as the fin can plus the retaining ring. I suggest using a longer tube and after the MMT and ring are glued, trimming the excess off at the ring. Dry fit your MMT into the fin can. If you encounter moderate resistance, either sand the inside of the fin can or sand/peel the top layer of the motor tube until you can slide the tube in without kinking it. If you kink the tube, the motor will not insert easily and can become jammed after flight.

Once the dry fit is complete, run one end of your shock cord down from the forward end until about 25mm (1 in) is sticking out the back. Apply a thin coat of epoxy to the aft end of the MMT and slide it in from the forward end until about 15mm sticks out the aft section. You must align the shock cord in the internal channel that was modeled to accommodate it. Take your retention ring, slide it onto the end of the tube, and push it up until the ring is seated on the aft end of the fin can, pinching the shock cord. Убедитесь, что все