10.3" Raptor

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cryoscum
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10.3" Raptor

Postby cryoscum » Sun Jan 26, 2014 2:39 pm

Hi All

Happy Australia Day to everyone! What a good time to start the build thread for this Aussie designed rocket. The smaller kits of this design will soon be available from Australian Rocketry, but Blake can fill you in on all of that.

The design is inspired by the Lockheed Martin F22 Raptor and I hope they don't mind me borrowing the name and some of the stylistics that makes this such a unique fighter plane.
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As always, I started with the rocket's general arrangement drawing to get the look right. A bit of back-and-forth between OpenRocket and my CAD software soon found it at a point where I'm happy with the design and the buildability of it. Some of my previous rockets are shown here for reference. This will be the biggest one for me to date.
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I'm awaiting the arrival of the new 6" Gorilla hardware (approx 35,000Ns case) and a few reloads, notably the monstrous O4474 Black Lightning and a high performance blue that is yet to receive an official designation. These are certainly the biggest commercial motors you'll see in Australia! The intention is to fly it at Westmar in June this year.

The tubes were made with the new cork interlayer that I mentioned in an earlier post elsewhere. The wall thickness is 5.3mm, made up of 3 layers 295GSM e-glass, 3mm cork (120kg/m3 density) and another 3 layers 295GSM. The tubes are currently 1.8m long and will be cut into lengths to suit the design.
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I'm very happy with the interlayer. The tubes are light and doesn't deflect in any way that I can see. The cork is not super densely packed, so random epoxy bridging between the inner and outer layers of glass occur, further strengthening the whole whilst still maintaining the low weight.
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With the tubes done, I started on the NC, a 5:1 VK with a base diameter of 261mm and the same cork interlayer construction.
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It's quite a big boy, so to make the profile box on the laser cutter (fast and accurate, so I prefer that to making it by hand) I broke the design down into smaller parts that would fit the 600x400 bed.
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With the profile box assembled I could start hot-wiring the plug, but I found that I didn't have enough EPS for the NC. I ordered some more, so I started with the boat tail, for which I did have enough EPS.
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A bit of additional sanding and the shape is good!
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I did the inner 3 layers of 295GSM this morning. The cork layer will need some careful fitment on the inner FG skin, so I'll do that as a seperate process. The BT's were done all in one go, but the complex shape of the boat tail & NC will probably need a cured inner skin...
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I'm off to a BBQ now and trust you're all doing the same! :D

Cheers
N
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Total impulse for 2015: 84,231 Ns
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Re: 10.3" Raptor

Postby october sky » Sun Jan 26, 2014 2:58 pm

Wow Nic, that looks really, really nice ! 8)
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Re: 10.3" Raptor

Postby kopius » Sun Jan 26, 2014 3:08 pm

Nic and I discussed to wait until Australia Day to announce this new kit. Australian Rocketry pty ltd is proud to soon be able to offer the Raptor in a number of sizes and configurations. We are currently manufacturing the relevant components for some of the kits and super excited to have Nic (who is the designer) build the showcase 10.3" (262mm) version.

At this stage, the kits will be in the available configurations:
2” version with 29mm or 38mm MMT and single deploy
3” version with 38mm or 54mm MMT and single deploy or dual deploy option
4” version with 54mm or 75mm MMT dual deploy
6" version with 75mm or 98mm MMT boat tail and dual deploy
10.3" versions will be available on special request

Depending on the size, we will also be the first to offer kits in a number of different materials that you can choose - fibre glass, phenolic and quantum tube.

We anticipate the first batch of kits to be ready in early February.
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Re: 10.3" Raptor

Postby SpaceManMat » Sun Jan 26, 2014 4:54 pm

Nic - Look forward to seeing this come together and fly at Westmar.

Blake - Great to see a home grown Aussie kit, have you got plans for others?
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Re: 10.3" Raptor

Postby ROCKet STAR » Sun Jan 26, 2014 5:01 pm

Love the design, Nic, that thing is going to look fantastic! Can't wait to see it fly. :D

I reckon I'll have to get myself one of the kits when they go on sale!
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Re: 10.3" Raptor

Postby kopius » Sun Jan 26, 2014 6:13 pm

SpaceManMat wrote:Blake - Great to see a home grown Aussie kit, have you got plans for others?

Indeed, there is currently 7 mpr/hpr kits in the making and a number of lpr kits too.

The next couple of months are going to be very exciting for the rocketry community ;-)
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Re: 10.3" Raptor

Postby matthew » Sun Jan 26, 2014 6:23 pm

Nice design. Thanks for posting the detailed build threads you do. I always go away having learned something. :lol:
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Re: 10.3" Raptor

Postby BerowraRocketBoy » Sun Jan 26, 2014 9:03 pm

:shock:

And I thought the sledghammer and talon were big!!

Seriously though, I've always loved the look of the F22 and may I say you have captured the essence of the plane perfectly. Any idea as to when you are going to fly this? Whatever happens that is one impressive rocket!

I'm just waiting for you to announce that this will have thrust vectoring built in. :wink:

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Re: 10.3" Raptor

Postby cryoscum » Mon Jan 27, 2014 12:31 pm

Thanks gents, but there is still a long way to go on this one. I may yet stuff it up!
BRB, I think June at Westmar in far western QLD would be the appropriate launch date & site. The site at Serpentine in northern Vic is also suitable, but the usual dryness there makes the use of sparkies a bad idea (or so I've been told :wink: ) and lugging something of this size to Williams WA is a really big problem...

Somewhat bleary-eyed this morning, but made the NC plug with 2 larger pieces of glued together EPS (didn't want to wait for new block to arrive). The boat tail has its inner glass layers on already, just need to do some shape work on it before the cork goes on. On top of that the crappy Ryobi belt sander I have decided to cark itself this morning, so it's time to gear up a bit. It was too small for what I'm doing here anyway:
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A snap of the boat tail, NC plug (and myself for scale) as it stands now. Damn NC is BEEEG!
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Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
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Re: 10.3" Raptor

Postby Fadge » Mon Jan 27, 2014 9:46 pm

Looking great Nic - can't wait to see it at Westmar.
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Re: 10.3" Raptor

Postby SpaceManMat » Mon Jan 27, 2014 10:00 pm

Good grief Nic are you sure you will actually be able to transport this one anywhere?
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Re: 10.3" Raptor

Postby Kryten » Tue Jan 28, 2014 8:05 am

cryoscum wrote:A snap of the boat tail, NC plug (and myself for scale) as it stands now. Damn NC is BEEEG!
2.JPG

Giant kebabs!
Awesome work, as usual
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Re: 10.3" Raptor

Postby jase » Tue Jan 28, 2014 10:24 am

Bit girly only going with one O4474 mate...

If you want to be true to the Raptor, it does have TWO :idea: engines AND thrust vectoring :twisted: :twisted: :twisted:

Admittedly, thrust vectoring might be slightly out of the realms of possibility (although with you I wouldn't rule it out entirely... 8) ) but TWO x O4474 should be doable with a 10" airframe, yes?

LOL - but seriously, I'm subscribed and:
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Re: 10.3" Raptor

Postby RobAust » Tue Jan 28, 2014 11:39 am

Nic,

Silly question, do you have a tall ladder so you arm the electronics.... You do realise based on your current trend that your next rocket will be big enough to have a seat in it !

Great build, I missed your evaluation of the cork, strength Vs thickness, so will go back and find this thread.

A well executed build from concept, step by step construction through to delivery.

Regards,

RobW

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Re: 10.3" Raptor

Postby cryoscum » Tue Jan 28, 2014 3:17 pm

Hi Rob, thought you would be frozen solid by now!?

The thread re the cork interlayer is here:
http://www.ausrocketry.com/forum/viewtopic.php?f=11&t=4109&start=24

Stay toasty! :)
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns


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