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by camacd
Mon Mar 21, 2016 9:37 pm
Forum: How to's
Topic: Multistaging
Replies: 13
Views: 3727

Re: Multistaging

OR file for mine attached.

If you plot sim 17 (I did lots of iterations) it shows the point at which the booster starts to tumble. I dunno how I made it do that :?
by camacd
Mon Mar 21, 2016 1:23 pm
Forum: How to's
Topic: Multistaging
Replies: 13
Views: 3727

Re: Multistaging

Hi Digit, See photos. The key to my design was the neat fit of a C motor into a spent Estes D casing. I cleaned out a spent D motor and cut it to a suitable length, and glued it into the booster motor mount to act as a motor stop, and also to confine the ejection gasses from the booster. I filed a s...
by camacd
Sun Mar 20, 2016 7:49 pm
Forum: How to's
Topic: Multistaging
Replies: 13
Views: 3727

Re: Multistaging

Hi Digit. I went through this exact thought process a few months ago, and settled on a D booster, which direct ignites a C sustainer, and it worked beautifully. I have flown it 3 or 4 times and its gone really well each time. If you want to pinch my design, I can send you through the open rocket fil...
by camacd
Mon Mar 14, 2016 3:12 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

So here is the cert flight. I have left in Ari's commentary.

[youtube]https://www.youtube.com/watch?v=PP_I5p8IwIs[/youtube]

https://www.youtube.com/watch?v=PP_I5p8IwIs

Very happy with the outcome.. Thanks especially to Blake for his assistance.
by camacd
Wed Mar 09, 2016 10:15 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

So thats it, ready to go for Sunday.

I did have some dramas with the altimeter. The first one was playing up and is now on its way back to missile works for some attention. (Thanks Blake and Jim for your help).

Hopefully the next post in the series will be a successful flight on an H motor.
by camacd
Wed Mar 09, 2016 10:13 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

Yesterday, I made up some decals. I have decided to name her "David Bowie". There may be some confusion of the sexuality, but then David was always a little each way! :) I sprayed a final coat of paint over both the red and the white - using new paint this time. Then applied the decals and...
by camacd
Wed Mar 09, 2016 10:08 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

I was fortunate enough to have a mate invite me out to Yarraman to give the rocket a test flight. The location had a few too many trees for my liking, and there was a bit of breeze around, so it was a tough decision whether to proceed with the launch. Perhaps against my better judgement, I launched ...
by camacd
Wed Mar 09, 2016 9:34 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

Ready for test flight
by camacd
Wed Mar 09, 2016 9:33 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

Painting. I used what paint I had lying around so the colour scheme is not very original, but looks OK. The problem was the white paint must have been pretty old. At first it did not cover very well at all, and then it took forever to cure. Even when I thought it was properly dry, as soon as I held ...
by camacd
Wed Mar 09, 2016 9:29 pm
Forum: Electronics
Topic: rocket locator...?
Replies: 8
Views: 2950

Re: rocket locator...?

Thanks Lister.

If I get my L1 this weekend, I'll be starting to look for more altitude, and of course a greater opportunity for losing the rockets.

A cheap simple solution would be very useful.

Cam
by camacd
Wed Mar 09, 2016 5:16 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

So now, time for the pre-paint trial fit-up. I made the chutes myself. I'm not an expert at sewing, so they are a bit rough around the edges (literally), but they seem to hold together ok. I have subsequently increased the size of the drogue.
by camacd
Wed Mar 09, 2016 5:12 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

Next step was the ejection charges. This is all new to me, so I spent some time with Blake, who was incredibly helpful. I downloaded a few different calculators from the web, but there was a fair bit of variation between them, and I spent some time working out what looked like a simple one, but whic...
by camacd
Wed Mar 09, 2016 4:57 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

The next stage was to make all the rest of the airframe components. You'll see in the picture that the forward airframe is quite short. There was some poor crafstmanship on my part (go figure!) and a damaged this bit. So I decided to make the replacement a bit longer, so there was more room for the ...
by camacd
Wed Mar 09, 2016 4:51 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

Awesome work.. should be an impressive L1 8) 1 thing, on the switch I noticed you left the wires bare.. I am not sure as my experience is limited but would you be better to slip some heat shrink over them before soldering so you can cover exposed wires or doesnt it matter? You are probably right Li...
by camacd
Wed Mar 09, 2016 4:44 pm
Forum: Scratch Built
Topic: My scratch built 54mm Level 1 rocket
Replies: 17
Views: 2924

Re: My scratch built 54mm Level 1 rocket

Then I made the Bulkheads. I am not sure how others do this, but I got Blake to cut out bulkhead discs to suit both the main tube and the adapter. Then I glued one of each together, making sure they were properly centred, and these would fit beautifully into the adapter piece at each end of the AV b...

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