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by air.command
Thu Jul 02, 2020 12:22 am
Forum: Electronics
Topic: Rocket tracker & monitoring thing
Replies: 10
Views: 365

Re: Rocket tracker & monitoring thing

Very nice work on that Craig! It's been really interesting following this project. What kind of a range do you expect to get in the end when it is in the airframe?
by air.command
Wed Jun 24, 2020 5:04 pm
Forum: Hybrid - Crossbreeding Rocketry
Topic: Hybrid question
Replies: 5
Views: 306

Re: Hybrid question

Interesting article, thanks for sharing. For the mixing part I was originally thinking something along the lines of what abrasive water cutters do where they mix the abrasive into the jet of water just before it emerges out of the nozzle. But you could potentially get ignition inside this mixing cha...
by air.command
Wed Jun 24, 2020 2:32 pm
Forum: Hybrid - Crossbreeding Rocketry
Topic: Hybrid question
Replies: 5
Views: 306

Re: Hybrid question

Haha... okay, yup probably not a good idea then. :D I realize that trying to come up with some way of mixing the two just prior to injecting it would be difficult, it was more a thought experiment than something that may be practical.
by air.command
Wed Jun 24, 2020 9:11 am
Forum: Hybrid - Crossbreeding Rocketry
Topic: Hybrid question
Replies: 5
Views: 306

Hybrid question

Do you think it would be possible to build a hybrid motor that uses a slurry of say HDPE powder and nitrous? If you could mix the powder and nitrous inside the rocket before it gets injected into the combustion chamber, would that work? The thinking is that you would have maximum contact between fue...
by air.command
Thu Jun 18, 2020 8:20 pm
Forum: Electronics
Topic: Battery isolator
Replies: 5
Views: 292

Re: Battery isolator

Very cool Strud, I am not sure how the internal contacts are configured inside the 3.5mm plug, but is there any chance of a cross connect between the contacts as the plug is inserted or extracted?
by air.command
Tue Apr 14, 2020 12:55 pm
Forum: Electronics
Topic: Camera
Replies: 7
Views: 724

Re: Camera

We've recently bought the Mobius MIni V2 that is nice and compact. It's a nice camera with very nice footage. Did you need the lens to be in-line with the tube or looking out sideways? We did a quick review of the camera here: Dimensions are 54mm x 29mm x 14mm WDNyhKFdl8w Its only about AUD$100 and ...
by air.command
Thu Apr 02, 2020 9:16 pm
Forum: Air Command Water Rockets
Topic: Horizon - 2 Stage Water Rocket
Replies: 34
Views: 32226

Re: Horizon - 2 Stage Water Rocket

Here is the latest video in the series. This video covers the completion of the launcher for this rocket. There are still minor tweaks to do, but we wil now move on to making the actual booster, and then tweak the launcher to suit. At this stage we are not sure on the timing of that but there are ce...
by air.command
Tue Mar 24, 2020 2:18 pm
Forum: Scratch Built
Topic: Model Rocket Survey
Replies: 7
Views: 635

Re: Model Rocket Survey

Also filled in the Survey. Good luck with the research project.
by air.command
Tue Mar 10, 2020 10:13 pm
Forum: Air Command Water Rockets
Topic: Practical Engineering Collaboration
Replies: 1
Views: 1165

Practical Engineering Collaboration

We had fun over the last few weeks working on a collaboration with Grady from the awesome Practical Engineering YouTube channel. (https://www.youtube.com/user/gradyhillhouse)

My son John did the editing of our water rocket part of the video. :D

by air.command
Thu Mar 05, 2020 11:46 am
Forum: Rocketry Control Room
Topic: Australia's first ever moon bounce
Replies: 2
Views: 949

Re: Australia's first ever moon bounce

I also love the idea of his buzzer that he used to summon his wife when he needed her. That reminds me of my uncle in his 70's practicing for a flight from Europe to Oz by sitting in his easy chair for hours at a time and having Auntie bring him food, then take his tray away, bring him drinks every...
by air.command
Mon Mar 02, 2020 11:14 am
Forum: Mid/High Powered Rocketry
Topic: Derek's Level 2 Build
Replies: 66
Views: 9267

Re: Derek's Level 2 Build

Hi Derek, I've always used this formula for getting a rough estimate of descent rate. http://web.archive.org/web/20111018045919/http:/my.execpc.com/~culp/rockets/descent.html It's no longer on-line but available through the web archive. I think OpenRocket can also predict the descent rate based on p...
by air.command
Thu Jan 30, 2020 7:58 am
Forum: How's the Weather..?
Topic: I've had an interesting couple of months. (pic heavy)
Replies: 8
Views: 2343

Re: I've had an interesting couple of months. (pic heavy)

That's really cool Matthew! Thanks for sharing the details.
by air.command
Tue Jan 14, 2020 8:32 am
Forum: Kids Korner
Topic: Carbon dioxide cartridge rockets
Replies: 9
Views: 6782

Re: Carbon dioxide cartridge rockets

Very nice work Simon. Glad to see you had good fun with the water rocket. I was surprised at how well the camera survived on the rocket without a parachute. I hadn't seen these particular cameras before they look nice and compact, how much do they weigh?
by air.command
Thu Jan 09, 2020 7:44 pm
Forum: Australian Model Rocket Society
Topic: AMRS K Impulse Single Motor Altitude Record broken!
Replies: 5
Views: 2502

Re: AMRS K Impulse Single Motor Altitude Record broken!

That's an outstanding effort Warren! Congrats on the record flight.
by air.command
Fri Dec 20, 2019 11:01 pm
Forum: How to's
Topic: Building a CF Tube
Replies: 56
Views: 8929

Re: Building a CF Tube

Hi Joe, Have a look here: https://www.sollercomposites.com/tow.html we have bought stuff from them before. They have quite reasonable prices. There is some fiberglass tow on that page, scroll to the bottom. It is interesting how they won't ship the high strength CF tow outside of the US.

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