Search found 2663 matches

by OverTheTop
Wed Sep 16, 2009 7:53 pm
Forum: Propulsion
Topic: Jet Propulsion
Replies: 14
Views: 4632

Have a look on the web for "pulsejet gokart". I have seen one with an interesting design that doesn't use valves.
by OverTheTop
Wed Sep 16, 2009 6:36 pm
Forum: Propulsion
Topic: Jet Propulsion
Replies: 14
Views: 4632

Synchronous pulse jet. Hmm. Sounds like a great idea! :o

Considering they use similar ideas for superchargers and other things, it would probably work. Maybe a little heavy?
by OverTheTop
Wed Sep 16, 2009 12:00 pm
Forum: Suburban Rocketry
Topic: Heads-up! Suburban Rocketry is closing.
Replies: 52
Views: 11147

Hope the move goes well Bones. We will work around what you need to do.
by OverTheTop
Tue Sep 15, 2009 9:11 pm
Forum: News & Events
Topic: NASA ENCOUNTERS NON-HUMAN LIFE
Replies: 4
Views: 1301

The SF author David Weber did a good series of books where humans are dealing with an arachnid alien life-form. Very well written. The first book in the series is "Insurrection", total of four in the series. Be warned. If you like SF based around space battles, his books are highly addicti...
by OverTheTop
Mon Sep 14, 2009 5:33 pm
Forum: Rocketry Control Room
Topic: Orion Project
Replies: 4
Views: 1673

Keeping nomenclature consistent is a good idea sometimes, but I think most people use the Constellation/Orion tags almost interchangeably. It does get a little confusing with the old atomic-powered version at times though. With so many words in the English language, why did they re-use Orion? : Just...
by OverTheTop
Sun Sep 13, 2009 6:20 pm
Forum: How to's
Topic: Using fiberglass to strengthen tubes
Replies: 28
Views: 6764

Any sources down in Victoria that anyone can recommend? I am about to receive a Velociraptor kit from Bones and I think I might glass it for the longevity. I guess this will be my L2 bird. No great rush... Any recommendations of books or websites that are useful for glassing skills in the rocketry a...
by OverTheTop
Sat Sep 12, 2009 8:01 pm
Forum: How's the Weather..?
Topic: When rockets goes wrong...
Replies: 41
Views: 5812

Just found this large model breaking up on youtube.

http://www.youtube.com/watch?v=ogYrvEEM0Ts&feature=related

I think it needed more glue, or something...
by OverTheTop
Sat Sep 12, 2009 11:59 am
Forum: News & Events
Topic: Ares Assembled
Replies: 7
Views: 1480

Great video. That test should give them some definitive data on their thrust oscillations they are worried about. I would think they would have tested some methods of mitigating the pulsations in that development motor.

Is that roar I hear the sound of progress!
by OverTheTop
Wed Sep 02, 2009 8:32 pm
Forum: Hybrid - Crossbreeding Rocketry
Topic: RATTWORKS
Replies: 148
Views: 23398

Customers buy it direct from BOC or Air Liquide or whoever (for overseas). Gas availability and price varies horrendously between countries.
by OverTheTop
Wed Sep 02, 2009 6:09 pm
Forum: Hybrid - Crossbreeding Rocketry
Topic: RATTWORKS
Replies: 148
Views: 23398

You would be surprised how much N2O gets used. Our company sells atomic absorption spectrophotometers that are used for analysing solutions and solids for elemental concentrations. Basically a light made from the element being looked at is directed through a flame (or other device) that atomises the...
by OverTheTop
Wed Sep 02, 2009 8:41 am
Forum: How to's
Topic: Painting a Rocket - to clear coat or not ?
Replies: 7
Views: 2159

I have never used a clear coat over any paint on my existing rockets, even the ones with decals. I may be tempted to clear overcoat the Lexxjet I am making if I am not happy with the paint edges between the three colors and the white base coat. I'll see how I go, but I suspect it won't end up with c...
by OverTheTop
Sun Aug 30, 2009 6:39 pm
Forum: Scratch Built
Topic: Alien Project - EMiR
Replies: 22
Views: 5215

Nice looking bird. If you are taking votes on the graphics, I vote for #1.

But if I were you, go with what you feel will look the best. You are the one who has to fly it!
by OverTheTop
Sun Aug 30, 2009 10:35 am
Forum: Scratch Built
Topic: BlackBird XL Project
Replies: 36
Views: 7908

Looks great! If you are worried about uneven ignition in the cluster configuration you could add a ventral fin like was added to some of the real SR71 units. That should give it a bit more tolerance to ignition timing and still maintain good scale. I guess you would need to build another one though,...
by OverTheTop
Fri Aug 28, 2009 7:51 pm
Forum: Rocketry Control Room
Topic: Blue Streak Rocket - Launch from Woomera (Video)
Replies: 3
Views: 2041

Good find Krusty.

Woomera doesn't seem to have changed from then to when my wife and I went through on our honeymoon back in 1999.

Loved the antique computers, nixie tubes, paper tape. It did the job, but glad we progressed from that stuff!! :D
by OverTheTop
Fri Aug 28, 2009 1:19 pm
Forum: Self Introductions
Topic: Hello from Melbourne
Replies: 18
Views: 3442

I can't believe you launch something that big on D motors!

Great work. :D

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