Search found 100 matches

by camacd
Sun Jul 10, 2016 5:50 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

It flies!!!!! GPS put me within a couple of metres of the landing point. I had to replace the altimeter because the one I had was playing up, and I'm glad I did. It was perfect flying conditions at Cedar Grove today. This was on a CTI I120, as a shakedown flight in preparation for L2 cert. Unfortuna...
by camacd
Sun Jul 10, 2016 5:04 pm
Forum: Queensland Rocketry Society
Topic: 10th July 2016 "Advertised" launch.
Replies: 38
Views: 5444

Re: 10th July 2016 "Advertised" launch.

That was a great day!

Perfect weather, great roll up of the public, and there must have been 100 try/fly rockets launched.

Some really interesting rockets including Matts flying saucer which I loved.

Thanks everyone!
by camacd
Wed Jul 06, 2016 8:16 am
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

I have also settled upon a name for the new rocket. I have made it a policy to name my rockets after dead people. I started with Elvis Presley even though the king never died. I've had BB King and David Bowie, but a couple of weeks ago fate handed me the biggest name of all. My new rocket will be na...
by camacd
Wed Jul 06, 2016 8:12 am
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

Was hoping to paint today but its blowing about 25 knots. Yesterday was raining and too humid -- running out of time. New build might have to fly nude.
by camacd
Tue Jul 05, 2016 9:03 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

https://www.youtube.com/watch?v=aybJirgLdYA" onclick="window.open(this.href);return false; https://www.youtube.com/watch?v=PrG7ZETTJGo" onclick="window.open(this.href);return false; Preliminary ejection tests. I used the same amount of black powder but go substantially more kick out of the nosecone ...
by camacd
Tue Jul 05, 2016 8:40 am
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

I haven't had much time over the last few weeks so everything has slowed down. However with the launch this weekend its time to get cracking. The airframe is now complete, and time to test the ejection charges. I did these tests without the parachutes fitted. I have a new chute coming from Blake so ...
by camacd
Wed Jun 15, 2016 12:30 pm
Forum: News & Events
Topic: Putting the NT in final frontier
Replies: 4
Views: 1348

Re: Putting the NT in final frontier

That sounds like fun. Where do I apply for a job!!!!!

Rocket launching and fishing combined. We now interrupt the countdown as a mackerel has taken the bait and the reel is going OFF.
by camacd
Tue Jun 14, 2016 1:31 pm
Forum: Queensland Rocketry Society
Topic: 12th June 2016 launch
Replies: 16
Views: 2905

Re: 12th June 2016 launch

Congratulations on the L1 digit. Very tidy rocket. I hope its not too badly waterlogged and will live to fly another day.

Once again very well crafted.

Cam
by camacd
Thu Jun 09, 2016 8:49 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

Slow progress on this rocket, but getting there. Fins are on. Fillets done. This is the first time I've done them using the epoxy putty and I had to do a couple of practices. I'm pretty happy with the outcome. So now I can move on with the next step, setting up the recovery - shock cord anchor and c...
by camacd
Fri Jun 03, 2016 5:58 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

So I'm back onto the build again after a few days off. Today is fin fitting day. I made myself a fin jig. This was a little more time consuming than planned because i don't have a hole saw that big, so I had to cuit the circle roughly with a jigsaw then file the ply back to the line, so it took a co...
by camacd
Mon May 30, 2016 8:34 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

You can clamp a piece of wood (say pine, with a straight edge) along where you want to cut. You then run the angle-grinder blade down the edge of the wood for a really straight cut. Works surprisingly well. Good idea. Any tips for getting a straight cut for a fin slot on the curved surface? Its a l...
by camacd
Mon May 30, 2016 4:54 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

Thanks Ari.

Now if only I had steady enough hands to be able to cut in a straight line....
by camacd
Mon May 30, 2016 3:27 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

About time I made some further progress. I have now prepped the aft airframe section, motor mount and fins. The fin design has changed as a result of the recent dialog above, where I learned about the effects of high velocity on stability. I have tweaked it to also make the most of the materials at ...
by camacd
Thu May 26, 2016 8:17 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

SO a couple of iterations later and I think I've hit on a reasonable compromise. 4 fins, with a relatively long base, good sweep back, and then optimised to reduce the height to get the best result. The stability varies during the flight but is a minimum of about Cal 2 at the high velocity which sho...
by camacd
Wed May 25, 2016 6:19 pm
Forum: Scratch Built
Topic: L2 build
Replies: 70
Views: 12983

Re: L2 build

Just for clarity, my objectives for this design are twofold 1- get my level 2. 2 - go as fast as i possibly can with a basic goal of Mach 2. The first objective should not be too big of an issue (touch wood), if I do my homework and keep everything well documented, ad build carefully. The second is ...

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