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by Kryten
Mon Mar 19, 2018 10:24 am
Forum: Scratch Built
Topic: L3 Cert - 1/2 scale Patriot
Replies: 306
Views: 42515

Re: L3 Cert - 1/2 scale Patriot

SpaceManMat wrote:Nice, will be great to see the patriot fly again soon.

+1
by Kryten
Sun Mar 11, 2018 2:00 pm
Forum: Kids Korner
Topic: School Project: HELP!
Replies: 7
Views: 271

Re: School Project: HELP!

Lots of ifs: If you have access to a large enough field for a C6 motor If you can correctly position a video camera you may be able to record the flight to just beyond apogee (before the parachute deploys), which may allow you to plot the parabola and calculate (roughly) its equation. A lower altitu...
by Kryten
Wed Feb 07, 2018 6:45 pm
Forum: How's the Weather..?
Topic: Happy birthday Ari
Replies: 25
Views: 2087

Re: Happy birthday Ari

Coming in a little late here :roll:
Happy birthday
by Kryten
Sun Jan 28, 2018 8:41 am
Forum: NSW Rocketry Association
Topic: Launch Day 27th January 2018
Replies: 4
Views: 312

Re: Launch Day 27th January 2018

What a great turnout for our first launch of the year!
36 launches in total, although I'm not sure that we should count the last attempted flight - Sam's beautiful "Falcon 9" suffered a CATO on an E12 motor.
by Kryten
Sun Jan 28, 2018 8:30 am
Forum: Self Introductions
Topic: G'Day from Germany
Replies: 14
Views: 1645

Re: G'Day from Germany

Hi Mathias,
If you're in need of a rocketry "fix", you're most welcome to come along to the next NSWRA launch day on 24th Feb.
Our model rocket site is in western Sydney
by Kryten
Thu Jan 25, 2018 10:30 am
Forum: NSW Rocketry Association
Topic: Launch Day 27th January 2018
Replies: 4
Views: 312

Launch Day 27th January 2018

This will be our first launch day in 2018.
See you at Whalan Reserve!
by Kryten
Wed Nov 29, 2017 9:14 am
Forum: Scratch Built
Topic: bodytube inner surface and ejection charge - heat protection
Replies: 14
Views: 685

Re: bodytube inner surface and ejection charge - heat protection

Back on topic: I suspect the discoloration/charring may be related to undercure of the resin. Your comment that it gets sticky when hot supports this. Since it's already had 2 successful flights, and you're only using low power motors, it looks like you'll probably get away with it. If the apparent ...
by Kryten
Wed Nov 22, 2017 9:58 am
Forum: Scratch Built
Topic: bodytube inner surface and ejection charge - heat protection
Replies: 14
Views: 685

Re: bodytube inner surface and ejection charge - heat protection

https://firescienceblog.com/tag/fabric-flammability/ When scanning the internet, I came across a great article in the Fall 2011 edition of On Track! magazine, which you may have some familiarity with. The article is titled, “Safe Batting Choices for Baby and Invalid Quilts,” by Beth Kurzava. The ar...
by Kryten
Tue Nov 14, 2017 2:57 pm
Forum: Scratch Built
Topic: bodytube inner surface and ejection charge - heat protection
Replies: 14
Views: 685

Re: bodytube inner surface and ejection charge - heat protection

I would think that would not be a good idea. It’s polyester cloths that are known to be very dangerous if they catch fire. It's the first time I've heard this. Can you provide a link to the source of this information? Not sure how much the resin varies but obviuosly from your previous report it’s n...
by Kryten
Sat Nov 11, 2017 11:51 am
Forum: Air Command Water Rockets
Topic: Filming rockets at apogee
Replies: 4
Views: 352

Re: Filming rockets at apogee

8)
Awesome work - as usual!
by Kryten
Sat Oct 14, 2017 4:36 pm
Forum: NSW Rocketry Association
Topic: Launch Day 7th October
Replies: 2
Views: 539

Re: Launch Day 7th October

It was a great morning of launching - 32 rockets in total.
Recoveries were all quite close, despite a little bit of breeze.
George has put the photos on the website: http://www.nswrocketry.org.au/gallery/2 ... s_Oct.html
by Kryten
Wed Oct 11, 2017 2:46 pm
Forum: Scratch Built
Topic: holes in rocket body tube - how they affect aerodynamics
Replies: 5
Views: 496

Re: holes in rocket body tube - how they affect aerodynamics

OverTheTop wrote:I think I have seen someone using a servo to release a hatch on a design somewhere.

You're probably thinking of a system used in water rockets.
Check out the AirCommand website for details of various deployment mechanisms
by Kryten
Wed Oct 11, 2017 2:42 pm
Forum: Scratch Built
Topic: half DVD fins
Replies: 5
Views: 434

Re: half DVD fins

SpaceManMat wrote:Neat idea, was expecting from the title to see very shiny fins.

Yep - me too.
Otherwise, I don't see the point of using non-conventional materials of construction
by Kryten
Thu Oct 05, 2017 3:50 pm
Forum: News & Events
Topic: Inside the Most Exclusive High-Powered Rocketry Event in America
Replies: 2
Views: 467

Re: Inside the Most Exclusive High-Powered Rocketry Event in America

Technically the wording is correct - we don't have "waivers" in Australia :wink:
by Kryten
Wed Sep 27, 2017 9:08 am
Forum: NSW Rocketry Association
Topic: Launch Day 7th October
Replies: 2
Views: 539

Launch Day 7th October

There will be a launch day at Whalan Reserve on Saturday 7th October, to replace the cancelled September launch day

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