Search found 965 matches

by strud
Thu Oct 16, 2008 4:16 pm
Forum: Rocketry Control Room
Topic: Johnson Space centre day out
Replies: 10
Views: 2827

No, that hadn't crossed my mind, but a horizontal static firing did :D
by strud
Thu Oct 16, 2008 9:18 am
Forum: Rocketry Control Room
Topic: Johnson Space centre day out
Replies: 10
Views: 2827

Interesting & informative page on the F1 engine as pictured in my NASA day out.

http://www.answers.com/topic/f-1-rocket-engine
by strud
Wed Oct 15, 2008 12:50 pm
Forum: Rocketry Control Room
Topic: Johnson Space centre day out
Replies: 10
Views: 2827

Johnson Space centre day out

Just came across some pics we took when coming home from work in the US about 5 years back.


http://picasaweb.google.com/cstrudwicke/JohnsonSpaceCentreNASAPics#

That was one of the best days out I've ever had !

Note the size of the F1 motor I'm standing next to :-)
by strud
Tue Oct 14, 2008 6:16 pm
Forum: Electronics
Topic: building a flight computer
Replies: 34
Views: 6581

So what compiler will you be using for the dsPic ?
by strud
Tue Oct 14, 2008 6:09 am
Forum: Electronics
Topic: gyroscopic stabilization
Replies: 34
Views: 8305

As stated the controller was in angular velocity only mode that flight and worked reasonably well.

The digital compass gives us the option to hold any particular roll angle during a flight, as long as the vehicle is vertical.
by strud
Tue Oct 14, 2008 6:07 am
Forum: Electronics
Topic: building a flight computer
Replies: 34
Views: 6581

As Andrew has suggested, the Motorola or Freescale ones are the go.

We've used these extensively and have worked a treat.

You could leave the accelerometer in as well to detect burnout for staging and use the Pressure transducer for apogee detection. That is what I'd suggest anyway.
by strud
Mon Oct 13, 2008 11:58 am
Forum: Self Introductions
Topic: Hi there
Replies: 22
Views: 3838

I agree.

A small group of capable motivated people is a very powerful force.
by strud
Mon Oct 13, 2008 11:56 am
Forum: Electronics
Topic: building a flight computer
Replies: 34
Views: 6581

That's a dsPIC ie a lot of grunt for that task. What made you chose that ?

One thing the accelerometer won't be able to tell you is attitude ie if you rocket is arcing over.
by strud
Wed Oct 08, 2008 9:26 pm
Forum: Electronics
Topic: gyroscopic stabilization
Replies: 34
Views: 8305

That was indeed a special machining effort, and was mostly PK's work. There's 3 of us who regulalry contribute to the machining work, although PK is ahead of us in the CNC stakes. Here is s short and a bit crappy video of the roll controller working very early in flight. url]http://picasaweb.google....
by strud
Tue Oct 07, 2008 7:40 pm
Forum: Support & Recovery & Misc.
Topic: Inline recovery bits
Replies: 2
Views: 1146

Ok, you're right, the pics are in need of some descriptions. Have added some useful comments : http://picasaweb.google.com/cstrudwicke/InlineDeploymentProject?authkey=A-MsvVP97PU#5254151936180588594 A lot more background info is in the previous link to the pdf about the first incarnation.
by strud
Tue Oct 07, 2008 8:49 am
Forum: Support & Recovery & Misc.
Topic: Inline recovery bits
Replies: 2
Views: 1146

Inline recovery bits

Made a little progress on a hard bag for my in-line recovery prototype. Pics are here : http://picasaweb.google.com/cstrudwicke/InlineDeploymentProject?authkey=A-MsvVP97PU# Original report of first prototype is here : http://www.members.optusnet.com.au/~cstrudwicke/Electronics/In%20Line%20recovery%2...
by strud
Mon Oct 06, 2008 10:32 am
Forum: Scratch Built
Topic: Australia Post 60mm Mailing Tube Rocket Project
Replies: 42
Views: 11648

Some pics & comments on putting the guts of a 90mm postpak vehicle together (unfinished) http://picasaweb.google.com/cstrudwicke/90mmPostpakKitAssemblyPics?authkey=r-kojpHXvQ4# A few more pics of 60 & 90mm vehicles mae from postpak tubes. http://picasaweb.google.com/cstrudwicke/90mmPostpakVa...
by strud
Mon Oct 06, 2008 8:00 am
Forum: Scratch Built
Topic: Australia Post 60mm Mailing Tube Rocket Project
Replies: 42
Views: 11648

Yes I have the 60 & 90mm moulds, although the 90mm one is currently stuck.

Will post some pics of noseones & airframes. I have built many 60 & 90mm postpak 'based' rockets and continue to do so.
by strud
Mon Oct 06, 2008 7:49 am
Forum: Scratch Built
Topic: birchwood ply
Replies: 5
Views: 1498

Checkout MrPly&Wood

http://www.misterplywood.com.au/

They definitely carry the Aircraft ply & it is awesome stuff.
by strud
Sun Oct 05, 2008 11:58 am
Forum: Support & Recovery & Misc.
Topic: Parachute Fabric
Replies: 26
Views: 10560


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