Search found 81 matches

by Bourney
Mon Sep 02, 2013 7:16 pm
Forum: Scratch Built
Topic: I'm going to put the M in Minie-Magg ...
Replies: 37
Views: 4495

Re: I'm going to put the M in Minie-Magg ...

Hi Mike,

Just wondering if there was a happy ending to the M in Minie Magg story?

Also wondering what you used to cut the hatches? Looks like something with a nice thin blade but that can also cut a smooth radius round the corners. Neat job.

Cheers

Bourney
by Bourney
Mon Jul 29, 2013 5:02 pm
Forum: I could use that
Topic: High current mini power switch
Replies: 2
Views: 788

Re: High current mini power switch

Found them at a site called Fingertech Robotics in Canada.

They designed them for use in those fighting robots where big LiPos are used for a fair duration and there's lot's of vibration/impact.
by Bourney
Sun Jul 28, 2013 6:35 pm
Forum: I could use that
Topic: High current mini power switch
Replies: 2
Views: 788

High current mini power switch

I was looking for a small switch that can handle high current for staging using an Aerotech First Fire and a 500mAh 12v LiPo - in a 38mm av-bay. I had considered using the Featherweight screw switch but couldn't find any specs on current handling. These are rated to 40A when using 16-gauge wire (100...
by Bourney
Mon Jul 16, 2012 6:31 pm
Forum: Mid/High Powered Rocketry
Topic: Trouble with my rocket kit.
Replies: 10
Views: 1303

Re: Trouble with my rocket kit.

The best tip I've heard for making engine hooks for Estes black powder motors was told to me by Krusty. The thin metal strips that are part of car wiper blade refills are almost exactly the same size width as the factory hooks and have good spring in them too. The metal from one used wiper blade wil...
by Bourney
Thu Jun 28, 2012 6:34 pm
Forum: Higher, Faster, Further
Topic: Composites, breaking Mach, and other stupidity.
Replies: 63
Views: 10398

Re: Composites, breaking Mach, and other stupidity.

A friend of mine used to work as an industrial chemist for one of the two major producers of Phenolic resin in Aus. This is a few years ago now but Orica was one and Borden (then owners of Corningware amongst other brands) was the other. The primary consumers of their product were Laminex and the pl...
by Bourney
Tue Jun 12, 2012 6:20 pm
Forum: Mid/High Powered Rocketry
Topic: Binder Design Velociraptor
Replies: 80
Views: 16923

Re: Binder Design Velociraptor

Hey Stewart,

That 1.5gms seemed to do the job with a fair amount of force.

Doesn't look like a long payload bay. 3.9 inches x how long? Plus 4 shear pins?
by Bourney
Sun Jun 03, 2012 3:58 pm
Forum: Scratch Built
Topic: Scratch 3 inch tube fin using Magna-Frame
Replies: 25
Views: 2669

Scratch 3 inch tube fin using Magna-Frame

Finished at last.

First launch later this month at Serpentine VIC on something like a J540R or J415W. Sims to around 1900 metres (6200 ft).

Perhaps then on a K550W or K185W to around 2200 metres (7200 ft).

Apologies for final photos, they're a bit dull on this grey Melbourne winter day.
by Bourney
Tue May 29, 2012 7:08 am
Forum: Rocketry Control Room
Topic: Coming in ballistic!
Replies: 0
Views: 1197

Coming in ballistic!

Here's one for those flights that don't go quite to plan. "A German schoolboy has become the first person to solve a Maths problem posed by Sir Isaac Newton 300 years ago. Shouryya Ray, 16, worked out how to calculate exactly the path of a projectile under gravity and subject to air resistance....
by Bourney
Sun May 27, 2012 11:45 am
Forum: Scratch Built
Topic: Scratch 3 inch tube fin using Magna-Frame
Replies: 25
Views: 2669

Re: Scratch 3 inch tube fin using Magna-Frame

Made some more progress this week painting the fin can (tube can?).




All that remains is to attach the coupler, cut/polish the fin can, attach the launch lugs, do a final weight/balance check and sim some motors.
by Bourney
Thu May 24, 2012 7:50 pm
Forum: Scratch Built
Topic: Krusty's latest Scratchy - "Mission Control"
Replies: 73
Views: 4146

Re: Krusty's latest Scratchy - "Mission Control"

Hmmm the story of Freefall the cursed level 2 rocket continues.

I'm wondering just how that post pack came to be outside that shop and what dark forces it visited upon previous owners....and what sacred rites must be performed to free you from its dark shadow.
by Bourney
Tue May 22, 2012 7:26 pm
Forum: Mid/High Powered Rocketry
Topic: Modified Madcow Torrent
Replies: 35
Views: 2781

Re: Modified Madcow Torrent

My thoughts exactly Drew. So I emailed them and asked if there were any Aussie distributors. Got a very quick reply, however my Japanese mustn't have been very good because what I received were price lists for the 5 (IIRC) solutions that make up the process. $1100 USD for 5 litres of each. You can u...
by Bourney
Tue May 22, 2012 1:45 pm
Forum: Mid/High Powered Rocketry
Topic: Modified Madcow Torrent
Replies: 35
Views: 2781

Re: Modified Madcow Torrent

I checked out the website and it sounds like this stuff was made for rocketry. "Gold, silver, bronze, brass, red, green, blue, violet, pink, brown, orange" "MEKKI Chrome can produce a real metal plating even on surfaces that couldn`t be plated until now(wood, glass, fiberglass, cerami...
by Bourney
Tue May 22, 2012 12:57 pm
Forum: Mid/High Powered Rocketry
Topic: Modified Madcow Torrent
Replies: 35
Views: 2781

Re: Modified Madcow Torrent

How good does that look!

Looked like the second guy was spraying water on it?

Yep I want a large rocket done like this. Will have to look further into that possibility.
by Bourney
Tue May 22, 2012 7:42 am
Forum: Mid/High Powered Rocketry
Topic: Modified Madcow Torrent
Replies: 35
Views: 2781

Re: Modified Madcow Torrent

Hey Drew, Don't beat yourself up over the clear over chrome disaster. We've all had that one. If It makes you feel any better those chrome paints quickly deteriorate whether you clear them or not. You only have to touch the surface to leave a print or turn it from chrome to silver. Best case is you ...
by Bourney
Mon May 21, 2012 6:02 pm
Forum: Mid/High Powered Rocketry
Topic: Modified Madcow Torrent
Replies: 35
Views: 2781

Re: Modified Madcow Torrent

Hey Mark, When it comes to rattle cans you've essentially got 3 choices for paint: 1. Enamel (Fiddly Bits, White Knight, Dulux from Bunnings etc). Pros are good coverage, deepest gloss. Cons are takes a loooong time to harden. 1-2 hours between coats. Might be dry but it'll be soft and easily damage...

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