Search found 1917 matches

by air.command
Wed Apr 10, 2019 3:44 pm
Forum: Scratch Built
Topic: L3 Cert - 1/2 scale Patriot
Replies: 334
Views: 56699

Re: L3 Cert - 1/2 scale Patriot

Nice work David! Great to hear that the rocket had another succesful flight! Very nice pictures too Derek.
What's been your most favourite motor to fly with this rocket David?
by air.command
Tue Apr 09, 2019 9:53 am
Forum: Mid/High Powered Rocketry
Topic: L1 Build - Upgraded Loc IV
Replies: 52
Views: 1943

Re: L1 Build - Upgraded Loc IV

Great write up of the entire build and excellent results at the end. Congratulations on the L1 cert. Looking forward to the on-board video as well. :D
by air.command
Tue Apr 09, 2019 9:47 am
Forum: NSW Rocketry Association
Topic: NSWRA - Mullaley Launch Photos - 6th/7th April 2019
Replies: 7
Views: 296

Re: NSWRA - Mullaley Launch Photos - 6th/7th April 2019

Awesome photos Derek! Thanks for posting. Looks like plenty of AP burned on the day(s). Congratulations on your L1flight. :) Are the face shields a requirement put on the students by the university?
by air.command
Mon Apr 08, 2019 10:15 pm
Forum: Thunda Down Under 2019
Topic: What is your project for Thunda Down Under 2019?
Replies: 59
Views: 11455

Re: What is your project for Thunda Down Under 2019?

Thanks Lamp. :) Yup, we underestimated by quite a bit how long it was going to take, well and a lot of procrastinating too. We hope to get it finished by the end of the year in time for another HPR launch in Mullaley later on in the year.
by air.command
Sun Apr 07, 2019 8:06 pm
Forum: Thunda Down Under 2019
Topic: What is your project for Thunda Down Under 2019?
Replies: 59
Views: 11455

Re: What is your project for Thunda Down Under 2019?

We didn't quite get to finish the booster for our 2 stage project for Thunda, but we will be bringing the sustainer with us to fly on it's own. Again we made two of them (red ones) so that if one blows up, we can still fly the other. One has a thinner wall and is lighter and the other has a thicker ...
by air.command
Sun Mar 24, 2019 7:58 pm
Forum: Thunda Down Under 2019
Topic: Campsite map/choice for Thunda?
Replies: 7
Views: 368

Re: Campsite map/choice for Thunda?

Yes I agree it would be nice to get this sorted soon.
by air.command
Tue Mar 12, 2019 10:07 am
Forum: Mid/High Powered Rocketry
Topic: L1 Build - Upgraded Loc IV
Replies: 52
Views: 1943

Re: L1 Build - Upgraded Loc IV

Very nice! Some tips for the camera: - Throw away the lens cap. (We have a beautiful flight filmed ... all black... because we didn't notice that the lens cap was on) Or at least paint the lens cap bright orange. - Put a piece of tape over the SD card. We've had the card pop out a couple of times af...
by air.command
Fri Mar 08, 2019 7:56 pm
Forum: Mid/High Powered Rocketry
Topic: L1 Build - Upgraded Loc IV
Replies: 52
Views: 1943

Re: L1 Build - Upgraded Loc IV

Very Nice build thread and great set of upgrades for the rocket! I think with that tilt switch setup, you'll be able to hear the rocket at burnout if it is not too far away by that shage. How will you access the altimeter to turn it on when it is on the pad?
by air.command
Mon Feb 04, 2019 7:58 am
Forum: Mid/High Powered Rocketry
Topic: Importance of an inner motor tube for high powered rocketry
Replies: 4
Views: 339

Re: Importance of an inner motor tube for high powered rocketry

It's a good question, and I think you could leave it out in some designs. In addition to what OTT said, some other uses for the motor mount tube (MMT) include: 1. In LPR sometimes people will friction fit the motor, and this is easier with a tube than with centering rings. The tube will also commonl...
by air.command
Thu Jan 24, 2019 10:44 am
Forum: Mid/High Powered Rocketry
Topic: Nike Apache Half-Scale Project
Replies: 101
Views: 20179

Re: Nike Apache Half-Scale Project

Sounds like the project is going along well. Really looking forward to seeing this one fly.
by air.command
Tue Dec 11, 2018 5:20 pm
Forum: Air Command Water Rockets
Topic: Flour Rockets
Replies: 5
Views: 2203

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: 2203

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: 2203

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: 36601

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: 25578

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...

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