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by air.command
Tue Dec 11, 2018 5:20 pm
Forum: Air Command Water Rockets
Topic: Flour Rockets
Replies: 5
Views: 977

Re: Flour Rockets

Cheers guys. :D I was doing a little more research on powder rockets today, and I had no idea that there was research done in this area in the early 70's in injecting powedered propellant (rather than liquids or solids) into a combustion chamber. Here is the research paper done by Bell Aerospace. ht...
by air.command
Mon Dec 10, 2018 8:50 am
Forum: Air Command Water Rockets
Topic: Flour Rockets
Replies: 5
Views: 977

Re: Flour Rockets

8) Water, Flour, Pyro...... Are you sure you weren't a bread Baker in a past life George.... One of the things we did discuss was that we should have had another rocket with eggs and one with sugar. To top it off a rocket filled with candles, and then a pyro rocket to cook it all and light the cand...
by air.command
Fri Dec 07, 2018 8:42 am
Forum: Air Command Water Rockets
Topic: Flour Rockets
Replies: 5
Views: 977

Flour Rockets

Had a bit of fun launching some water rockets powered by compressed air and dry flour at the last launch of the year. :D



They do make a bit of a mess on the ground though.
by air.command
Fri Aug 03, 2018 10:58 am
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 69
Views: 33921

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: 25362

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: 2208

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: 26653

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: 69
Views: 33921

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: 25362

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: 25362

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: 1234

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: 6730

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: 6730

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: 1233

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: 1233

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_...

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