Proton M

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natty
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Proton M

Postby natty » Fri Jun 10, 2016 10:27 am

G'day Viewers

I watched the Proton M lift off yesterday and I was feeling inspired!

After a bit of a look around the garage I came across these tubes
FullSizeRender-1.jpg



Now I'm thinking that I can do this!

I'm thinking that I'll just have a central motor rather than getting 6 boosters to ignite off the pad.

38mm or 54mm MMT?
The oblique nose cones are going to have to be made by hand - or perhaps 3D printed. If anyone can help me out with that, that would be awesome!

Let me know what you guys think

Cheers
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Re: Proton M

Postby Lister » Fri Jun 10, 2016 10:35 am

I have been thinking about this for a while. I was planning to use a foam mandrel to make a nose cone, then take a mould and do it that way for the canted nose cones. 3D printing would be easier though.

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Re: Proton M

Postby vance2loud » Fri Jun 10, 2016 11:05 am

What dimensions would you require?, I will see what I can find.
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Re: Proton M

Postby natty » Fri Jun 10, 2016 11:22 am

Vance,

The boosters are just 60mm Post Packs the wall thickness is about 2mm
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Re: Proton M

Postby vance2loud » Fri Jun 10, 2016 2:41 pm

60postprotonnose.jpg
60postprotonnose.jpg (23.66 KiB) Viewed 1816 times

64-65mm OD with 4mm wall thickness to allow a bit of sanding.
10mm of straight section at the bottom for gluing a coupler into.(should be 60mm ID in that section)
125mm overall height.
Should work out to around 50g after it is sanded to fit.
I found a 3d model of the proton and cut the rest off so hopefully it is to scale.
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Re: Proton M

Postby vance2loud » Fri Jun 10, 2016 5:10 pm

DSC_0277a.JPG

A low detail attempt to check sizes, my printer is printing 2% under sized apparently or the PLA is shrinking as it cools.
That's against a 75mm center tube.
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- Thomas Alva Edison

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Re: Proton M

Postby vance2loud » Fri Jun 10, 2016 5:24 pm

And in response to your motor question, 54mm, you can always adapt down
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Re: Proton M

Postby Lister » Fri Jun 10, 2016 6:01 pm

Mate that looks awesome.. want to print one for me thats the ID of a post pack tube and I will make a few FG ones.

natty
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Re: Proton M

Postby natty » Sat Jun 11, 2016 10:35 am

FAR OUT!!!

WOW!

I'll place an order for 6! Better make it 8 incase I stuff a couple up!

I was thinking of giving them a quick lick of epoxy to make them smooth and shiny. Has anyone tried this?

Cheers
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Re: Proton M

Postby Lister » Sat Jun 11, 2016 11:00 am

I know OTT just sanded down the PLA (or what ever material it was printed in) and it came up very smooth.. if you use a power sander remember to use it on low speed.

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Re: Proton M

Postby OverTheTop » Sat Jun 11, 2016 11:16 am

Your NC looks good Vance!

My 4" nosecone was made from ABS and was just sanded. If using ABS stick to hand sanding only as the power sanders just cause the plastic to melt and ball up somewhat.

On the fins for my VTS (also ABS) I filled with CA glue (Loctite 401) and then sanded. Repeat. Good smooth result.

I don't have any experience sanding PLA (have never used the stuff).
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Re: Proton M

Postby vance2loud » Sat Jun 11, 2016 2:22 pm

I found when I made this nosecone tip (UHMWPE) on the lathe, I was best to put it in a sealed bag in the freezer first then sand it, It took a lot of hand sanding with this as it is a wear resistant plastic.
DSC_0282a.JPG

I am unsure what the best products will be for finishing these to get them ready for paint.
I have smoothed the cone section and lowered the wall thickness, They were starting to get a bit heavy especially with a coupler. I have them back down to 55g with the coupler.
DSC_0280a.jpg
DSC_0284a.jpg
DSC_0285a.jpg

They should only require the base to be filed or sanded to size then a coat of some kind of sealer/primer and a final smooth sand before paint.
TRA #15165 AMRS #50
I do it because i can, I can because I want to, I want to because you said I couldn't. - Unknown
I have not failed. I've just found 10,000 ways that won't work.
- Thomas Alva Edison

vance2loud
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Re: Proton M

Postby vance2loud » Sat Jun 11, 2016 2:37 pm

The coupler is threaded on one end so a bulkhead can be screwed in place if you require a sealed space for a camera or other electronics. the bulkhead adds another 11 grams and I still need to work on the thread a bit.
DSC_0287a.jpg

DSC_0290a.jpg
All sealed up
TRA #15165 AMRS #50
I do it because i can, I can because I want to, I want to because you said I couldn't. - Unknown
I have not failed. I've just found 10,000 ways that won't work.
- Thomas Alva Edison

vance2loud
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Location: Devonport, Tasmania

Re: Proton M

Postby vance2loud » Sat Jun 11, 2016 4:29 pm

Sorry for taking over your thread Natty,
How have you gone trying to simulate this?
Would you be adding clear fins for stability?
More details wanted.
After looking at this I might try an Ariane 5 with Hermes if I can work out how to sim it
TRA #15165 AMRS #50
I do it because i can, I can because I want to, I want to because you said I couldn't. - Unknown
I have not failed. I've just found 10,000 ways that won't work.
- Thomas Alva Edison

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Re: Proton M

Postby OverTheTop » Sat Jun 11, 2016 5:58 pm

When you get the sim working I think you will be pleasantly surprised with the stability.

I like your epoxy idea Nat. Maybe try adding some microballons to make it more sandable? Not sure if this is a good idea or not. May make it too hard to apply and also affect the bonding to the PLA. Maybe an experiment is needed?
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