Plastic Nose Cone Mods

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Күн бұрын

This video shows you how to add nose weight and build an electronics bay into a plastic nose cone. See jcrocket.com/plastic-nose-mods... for details.

Пікірлер: 65

@karmasurge4842 Жыл бұрын

This guy is a genius! Good work man

@sed6 9 ай бұрын

I copied this design 7 years ago and it still works great! I used an eye bolt instead of a u-bolt.

@donnieporter7890 4 жыл бұрын

Thank you for the video you have given me so many great tips and ideas

@mguerramd 2 жыл бұрын

JB Weld makes an epoxy for plastic. I used it to glue together a piston in an espresso machine that is exposed to high temperatures and pressure. Holds like a champ.

@ChaseColbert 9 жыл бұрын

Awesome videos!!! Keep making more! -chase

@furroy 10 жыл бұрын

love your vids john!

@scottvandenhout1796 3 жыл бұрын

Awsome video keep them coming

@lcdmonitor1981 5 жыл бұрын

Man I really need a shop sink in the garage, maybe that’ll be my next project

@sandorbogyo7758 10 ай бұрын

John, your videos are fantastic! I started building rockets (from Hungary) at the age of 70, thanks to your influence! My question is, what is the diameter of the brass crossbar when building the nose cone weight?

@JohnLCoker 10 ай бұрын

Thanks for the kind words. I don't think it's critical, but I believe I used 1/8" rod (2-3mm). I think larger is a bit less likely to tear the plastic.

@2101Striper 8 жыл бұрын

Thanks for sharing your modification. This looks very useful. Nice work.What are your favorite tools to use when cutting the plywood centering rings and bulkheads?

@JohnLCoker 8 жыл бұрын

+2101Striper My favorite tool for cutting all flat parts is a CNC router. Someday additive manufacturing will make everything, but for now machining is still the way to go. kzfaq.info/get/bejne/qrWmepOflpOyf5s.html

@jimrky6062 3 жыл бұрын

Excellent video. Question: Why not use short brass "pins" inserted through the nosecone into the T-nut ring to provide more mechanical advantage?

@JohnLCoker 3 жыл бұрын

I hadn't thought of that, but I'm sure that would add some strength.

@ussling 3 жыл бұрын

What is the brand and model of the wristwatch you are wearing in this video?

@frankwaters2133 3 жыл бұрын

Thank you John for these instructions. I am attempting this with the same nosecone, and wonder if the outer diameter of the ring being bonded to the nosecone is still available in your records? Having that dimension as a reference should save some trial and error. Thanks again.

@JohnLCoker 3 жыл бұрын

Sorry, I don't recall any longer. I picked a ring out of the parts box and just sanded it to fit. (That was the old days of hand work.)

@samatwood5847 Жыл бұрын

Thanks for this great video, I plan on making these mods to my 4" plastic LOC Goblin nose cone. I've ordered a 3.9" OD, 54mm plywood centering ring. I don't have a CNC machine. What is the best way to size this centering ring to fit into the nose cone, since it will be too large?

@JohnLCoker Жыл бұрын

What I actually did here was sand down an existing CR. You don't need to take much off for it to fit inside the cone, above the shoulder.

@normanperkel139 4 жыл бұрын

Hi John, first allow me to say thank you for producing these videos. A LOT has changed with the hobby that I left 40 years ago! Okay, so here is my question, how do we know how much lead shot to use in our rockets? By using simulation software, or is there a different way that you like to use?

@JohnLCoker 4 жыл бұрын

First of all, most rockets don't need any. But if you are building a custom design, you should verify by comparing the center of pressure and gravity. You can do that through simulation, but I prefer to measure after the rocket is built. See this video for details: kzfaq.info/get/bejne/f9KKfdFzzZPKh3k.html

@normanperkel139 4 жыл бұрын

@@JohnLCoker Thanks John. What I am doing is modifying an existing kit from 29mm engines to 38mm so I will have more choices of engines to use a a variety of fields near my home. Again, thanks for your help, and stay safe and healthy.

@samatwood5847 Жыл бұрын

PS to my last comment: Instead of using plywood for the centering ring and bulk plates, could we use 3-D printed pieces? Would they hold up to the ejection and recovery stresses?

@JohnLCoker Жыл бұрын

Yeah, 3D printing would probably be fine. You'd just have to make sure it could withstand the recovery forces if you put an eye bolt through it.

@samatwood5847 Жыл бұрын

I've completed the ebay for my 4" Goblin plastic nose cone following your instructions. I am using a Perfectflight MiniAlt/WD altimeter for dual deployment using a line cutter for the main chute. Where should I put the sampling hole in the nose cone (for the altimeter), and what diameter should it be? Thanks.

@JohnLCoker Жыл бұрын

I would put one 1/4" (6mm) hole on the side about 1" (25mm) above the shoulder. You want it in relatively smooth airflow. I usually also take advantage of the pressure equalization hole to provide switch access.

@samatwood5847 Жыл бұрын

@@JohnLCoker Thanks!

@TheMightymo05 6 жыл бұрын

Hi, John. In many of your videos you use a substance you call "ca." If I may ask, what is it?

@JohnLCoker 6 жыл бұрын

"CY" or "CyA" are abbreviations for cyanoacrylate adhesives, such as "Crazy Glue". en.wikipedia.org/wiki/Cyanoacrylate

@scottvandenhout1796 Жыл бұрын

Love your rocketry videos. Would love to see more. Could you please let me know the dimensions of the ring and sled bulkhead please

@JohnLCoker Жыл бұрын

The ring is cut to fit inside the nose cone; the exact dimensions are going to vary. I started with a regular CR and sanded it down until it fit tightly just above the shoulder of the nose cone.

@scottvandenhout1796 Жыл бұрын

@@JohnLCoker thank you

@chuckc7423 2 жыл бұрын

Any chance you would make a kit to sell for the exact same nose cone?

@JohnLCoker 2 жыл бұрын

Thanks for the vote of confidence, but I don't sell anything.

@aryakeyvan1814 8 жыл бұрын

How does the gps get a signal from inside the rocket?

@JohnLCoker 8 жыл бұрын

The GPS (radio) frequencies will travel through materials such as plastic.

@RME76048 5 жыл бұрын

First time I ever saw caviar used as nose weight.

@rongould112 3 жыл бұрын

Did you cut the wood parts yourself.??

@JohnLCoker 3 жыл бұрын

Yes, the ring a modified standard centering ring, sanded outside to fit into the nose.

@b.h9186 3 жыл бұрын

how you did this nose cone ? sorry for doing to many question

@JohnLCoker 3 жыл бұрын

This is a Loc/Precision nose cone.