SpaceX Starship?

Anyone have a good openrocket file for a SpaceX Starship? what ratio nose do you think that is? Know of any nosecones that looks similar somewhere bt80 and up?

You could get a largebalsa nosecone and sand it down to the shape you want.

Or maybe wait for another redesign? Lol

RKeller said:

Anyone have a good openrocket file for a SpaceX Starship? what ratio nose do you think that is? Know of any nosecones that looks similar somewhere bt80 and up?

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I'm probably going to 3D model and print one so I'll let you know the ratio.

Ben Martin said:

I'm probably going to 3D model and print one so I'll let you know the ratio.

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Cool! Wanna share your model when you're done?

RKeller said:

Cool! Wanna share your model when you're done?

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It will be on Thingiverse [emoji106]

Its smaller than a BT80, but BMS's BNC-70AJ is the right shape at about 2.5:1 ratio.

Here is one: https://www.thingiverse.com/thing:3349266

Hmmm....could you modify a "3FNC" from Pemberton Technologies?

Sorry, now I realize the nose is too different.

https://www.pembertontechnologies.com/3fnc/

3D modeled the nosecone according to the official photo released by SpaceX. The ratio is around 2:1 (1.85 to be exact).




I plan on designing a 3in (possibly high power) Starship. I'll post the progress here if that's alright.

Looks great! I was measuring the image on my computer screen and it looked around 2:1. Very nice work on the model!

And of course you can post here if you want!

That is awesome. I can’t wait to see it printed,.

Completed the Starship model.











The model will be posted on Thingiverse once I verify that it will 3D print correctly. I'm happy with how it turned out.

Very nice! Can't wait to see it printed!

Me likey.

Any diameter in specific that you guys want it to be? Thinking about making the fins into a printable fincan to make things simple.

Would love to have one in a diameter that I could run LP in and one for MP power too … I'm not in to HP yet !!!

Uploaded 3in and 4in fincans to Thingiverse. I will work on the smaller diameters right now. Fincans will be later as I have to get them correctly scaled.

Link: https://www.thingiverse.com/thing:3577543

Toothless said:

Would love to have one in a diameter that I could run LP in and one for MP power too … I'm not in to HP yet !!!

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Any specific diameters in mind?

Ben Martin said:

Any specific diameters in mind?

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I have no idea, I've never printed a Rocket before so I have no clue as to what it would weigh

Toothless said:

I have no idea, I've never printed a Rocket before so I have no clue as to what it would weigh

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Would likely just recommend printing a fincan for the smaller diameters. It makes it simpler.

This isn't Starship but rather Starhopper, the slightly shorter and fixed fin prototype of Starship (that is before the nose cone blew over and they decided to just leave it as a trash can with fins).

Printed in 3 segments of ABS, the layer adhesion on the white filament was garbage so I coated it in epoxy.
That shiny tube beside it is actually vinyl stickers that will be cut to cover up the whole thing.

The plan is to build it in a really unconventional skin and stringer style with laser cut plywood and bulk heads so I can actually strip it down. It's pretty thin wall so a little added strength will be nice. It will also need a LOT of nose weight, a taller version would be much easier. Mind you that's planning for 3xD12's so there's a lot of weight to deal with.
I do have long term ambitions of putting a BPS.space TVC kit but who knows when that might ever happen.


Its 1:88 scale to match the official Falcon 9 model as well as my long, long delayed Falcon Heavy.

I got all the insides built up and all the vinyl decals applied.

Apologies for the low res photos, I had to use my webcam instead of my phone due to some camera problems...

Nice!!!

Beautiful silver finish! How did you do it?

aerostadt said:

Beautiful silver finish! How did you do it?

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CNC cut vinyl stickers. One could do it with chrome tape from an automotive store too. The nose cone was printed as as staigt conical segments instead of a contstant curve to make it eadier.

The other Starhopper thread had me wondering about this and base drag:
https://www.rocketryforum.com/threa...tarhopper-aka-deskhopper-scratchbuild.154605/

Here is the open rocket file for this, I'm hoping to learn more on base drag and if I can reduce the nose cone weight. Also looking to obtain a reasonable estimate on altitude of this.

I've created one with the base drag "cheat", and one without. The difference in nose weight is about 200 grams, quite substantial.
https://www.apogeerockets.com/education/downloads/Newsletter162.pdf

First of all, you didn't override the weight of the base drag tail transition to 0, so the situation is even a bit better, and you can reduce the nose weight a touch more.

I tried deleting the tail transition and overriding the CG forward, to just get it stable for simulation, and got a bit over 1900ft:


With the nose weight reduced a bit more, that number will change a bit again.

As I've mentioned in the past, I *think* that for the flight simulation, you omit the base drag correction; otherwise it adds still more drag that doesn't exist in the model. If someone can confirm that is correct it would be great.

Also, if you go with about 1/10 the length of the rocket as stability margin target, you can reduce the nose weight even more.

Regrettably I am not certain about how much of this is "correct."

I planned to fly this rather obsolete Starhopper model this weekend while visiting some family who live beside a big frozen lake. I did a few spin tests on it and found I needed to add a little more weight than predicted with the base drag correction, but still less than without it.

Unfortunately when I was testing deployment I realized that I had forgotten the parachute at home - so flight was totally out of the question. I had also added more weight than was needed.

I still wasn't sure if my launch controller would light up 3 composite motors simultaneously, so I figured screw it lets do a static fire test.

All 3 motors were Aerotech E15-Ws, the outboards being plugged nozzles and the inboard a 7 second delay.

My hope was to use the video to analyze timing but filming at night washed out the video too bad to tell.

Where is Bob Seger ?