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by air.command
Fri Aug 03, 2018 10:58 am
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 68
Views: 24160

Re: Vertical Trajectory System (with some 3D printed parts)

The fins look great OTT! Good luck with the flight, I'm very much looking forward to the flight report. How do you think the fins will go on landing?
by air.command
Mon Jul 16, 2018 2:50 pm
Forum: Air Command Water Rockets
Topic: Horizon - 2 Stage Water Rocket
Replies: 11
Views: 16884

Re: Horizon - 2 Stage Water Rocket

Here are the next two parts of the series. Part 5 is about building a test stand to apply forces (up to 10kN) to different components before we subject them to compressed air. v5f0stjvqLE Part 6 describes the overall launcher design and also how we made the release head that holds down the entire ro...
by air.command
Fri Jul 06, 2018 2:01 pm
Forum: Scratch Built
Topic: Steampunk 1
Replies: 35
Views: 1847

Re: Steampunk 1

Sounds like a great design. I will definitely be following the build thread. :D
by air.command
Thu Jul 05, 2018 11:34 am
Forum: Self Introductions
Topic: Greetings
Replies: 14
Views: 17120

Re: Greetings

Hi Derek, Welcome to the forum and back to rocketry. :D
by air.command
Wed Jun 27, 2018 3:09 pm
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 68
Views: 24160

Re: Vertical Trajectory System (with some 3D printed parts)

Very interesting update on this project OTT. Wow, 140W is quite a bit power to have on hand when needed. Interesting problem with the negative G-s. How will you determine when it is safe to start trusting sensor after burnout? Also when the servos are in their neutral position, are they actively bei...
by air.command
Fri Jun 22, 2018 11:16 pm
Forum: Air Command Water Rockets
Topic: Horizon - 2 Stage Water Rocket
Replies: 11
Views: 16884

Re: Horizon - 2 Stage Water Rocket

Thanks for the nice words OTT. Dad and I are having fun building this rocket together.
by air.command
Fri Jun 22, 2018 9:23 am
Forum: Air Command Water Rockets
Topic: Horizon - 2 Stage Water Rocket
Replies: 11
Views: 16884

Re: Horizon - 2 Stage Water Rocket

It's been a while since I have updated this thread. We're continuing to make good progress on this rocket, and with Thunda less than a year away we need to push a little more. Here are parts #3 and #4 of the series. Part #5 should be out next week.



by air.command
Fri Jun 08, 2018 7:05 pm
Forum: Scratch Built
Topic: AUK XIII - L2 Build
Replies: 13
Views: 896

Re: AUK XIII - L2 Build

That's great! Very well done 8) Congratulations on your L2!
by air.command
Wed May 30, 2018 11:30 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 69
Views: 5464

Re: Don't Debate This, Too

I'm all ears! Do you have a reference for the 55-degree number? I heard something similar before but could never find a source. I would also be very interested to understand how you are estimating your case strength and how this is stacking up against test results. One of my big questions right now...
by air.command
Mon May 28, 2018 3:38 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 69
Views: 5464

Re: Don't Debate This, Too

Thanks for sharing all the great details of your build Mike! Looks a like a fascinating project. Would it help to cool the mandrel with ice when extracting it from the tube? I am looking very closely with what you do with carbon fiber casing, as we too are in the process of making some high pressure...
by air.command
Mon May 21, 2018 11:15 am
Forum: NSW Rocketry Association
Topic: Mullaley Launch 5th May 2018
Replies: 8
Views: 985

Re: Mullaley Launch 5th May 2018

Here is a highlights video from the Saturday launch.

by air.command
Tue May 15, 2018 3:25 pm
Forum: NSW Rocketry Association
Topic: Mullaley Launch 5th May 2018
Replies: 8
Views: 985

Mullaley Launch 5th May 2018

Hi guys, Here are some photos from the last launch at Mullaley. We had absolutely beautiful weather with blue skies, little wind and nice temperatures. There were some pretty spectacular launches, as well as some sub-optimal ones. http://www.nswrocketry.org.au/gallery/2018_Launches/Mullaley_2018_05_...
by air.command
Mon May 14, 2018 3:19 pm
Forum: Mid/High Powered Rocketry
Topic: Purple Parrot - MD 38mm
Replies: 99
Views: 10074

Re: Purple Parrot - MD 38mm

Wow that's awesome. 8) :shock: Congratulations on a great flight Mat. How did the performance compare to simulations?
by air.command
Mon May 14, 2018 2:16 pm
Forum: Scratch Built
Topic: Dark Shadow - Build Thread
Replies: 76
Views: 10066

Re: Dark Shadow - Build Thread

Cheers guys.
@SpaceManMat - That's why dad was wearing an old Helmet, eye protection and earplugs. I don't want to get anywhere near that thing. One day we'll get confetti. :D ...hmmm .... that will have to be the name of the next rocket ... "Carbon Confetti"
by air.command
Mon May 14, 2018 12:10 pm
Forum: Scratch Built
Topic: Dark Shadow - Build Thread
Replies: 76
Views: 10066

Re: Dark Shadow - Build Thread

As it has been a couple of years since we last flew this rocket, it was time to dust it off again at the last Mullaley launch. Here is a highlights video from that flight: fvebpl3W1Sg We are still not sure what the upper pressure limit is for this rocket, though some recent ground tests on similar p...

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