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by Kryten
Fri Jul 20, 2018 8:52 am
Forum: NSW Rocketry Association
Topic: Mosquito Drag Race
Replies: 2
Views: 257

Re: Mosquito Drag Race

Are we allowed to drag race at Whallan Reserve? :D It would be quite a spectacle seeing them all simultaneously head off in different directions . You may have answered your own question. Launching 1 rocket at a time allows everyone to focus just on that. You should also check out the NSWRA Policie...
by Kryten
Sat Jul 14, 2018 2:49 pm
Forum: Scratch Built
Topic: Airframe choices (or why you should consider rolling your own airframes)
Replies: 44
Views: 1637

Re: Airframe choices (or why you should consider rolling your own airframes)

The strength comes from the fibre. The polymer binds the whole lot together. It's essentially a "glue"
Merely adding lots of resin, as in a bog, doesn't add anything to the strength
by Kryten
Thu Jul 05, 2018 11:13 am
Forum: Self Introductions
Topic: Greetings
Replies: 14
Views: 562

Re: Greetings

Hi Derek,
It was good to see you back!
Hopefully you'll be a bit more mobile by the time you launch the high power rockets - or is that why you're training your kids?
by Kryten
Mon Jun 25, 2018 11:36 am
Forum: How's the Weather..?
Topic: Wednesday 6th June
Replies: 4
Views: 296

Re: Wednesday 6th June

:lol:
by Kryten
Thu Jun 07, 2018 10:09 pm
Forum: How's the Weather..?
Topic: Wednesday 6th June
Replies: 4
Views: 296

Wednesday 6th June

On this date... apparently there was a RL game.
Would any Queenslanders like to tell us what the score was?
by Kryten
Mon Mar 19, 2018 10:24 am
Forum: Scratch Built
Topic: L3 Cert - 1/2 scale Patriot
Replies: 314
Views: 44442

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: 940

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: 2350

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: 539

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: 1828

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: 539

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: 794

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: 794

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: 794

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: 417

Re: Filming rockets at apogee

8)
Awesome work - as usual!

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