Search found 573 matches

by bpratt
Fri Sep 23, 2011 9:30 am
Forum: How's the Weather..?
Topic: Interesting finding about World Trade Tower collapse
Replies: 14
Views: 1718

Re: Interesting finding about World Trade Tower collapse

. I like the last sentence of the article... "Firing a rocket with fire-retardant that could coat the aircraft body could also help prevent metal alloy from melting." Imagine the conspiracy theories if that was done back then :roll: . Not wrong there, the conspiracy theorists would've cla...
by bpratt
Thu Sep 22, 2011 7:22 pm
Forum: How's the Weather..?
Topic: Interesting finding about World Trade Tower collapse
Replies: 14
Views: 1718

Re: Interesting finding about World Trade Tower collapse

I like the last sentence of the article... "Firing a rocket with fire-retardant that could coat the aircraft body could also help prevent metal alloy from melting." Yes, I have to agree with you on that one.... if there were such things, they'd have need dozens of them fired in to all the...
by bpratt
Thu Sep 22, 2011 5:27 pm
Forum: How's the Weather..?
Topic: Interesting finding about World Trade Tower collapse
Replies: 14
Views: 1718

Re: Interesting finding about World Trade Tower collapse

I don't think they're saying that it all melted to the one spot in its entirety causing a big explosion, but that under the high temperatures of the fire segments pooled then fell in to quantities of water which exploded at different times. :) Small explosions at different locations thoughout the fl...
by bpratt
Thu Sep 15, 2011 5:12 pm
Forum: Propulsion
Topic: Pulse Jet Rocket?
Replies: 6
Views: 1985

Re: Pulse Jet Rocket?

Hey, they look really interesting things to play with. :)
by bpratt
Tue Sep 13, 2011 11:04 am
Forum: Electronics
Topic: Frequency ranges and licensing
Replies: 6
Views: 2442

Re: Frequency ranges and licensing

Last time I looked the Big Red Bee were capable of up to 8 Watts, and they work on the amateur 2M band, so you'd be pretty hopeless if you couldn't track your rocket with one of those. ;) Too much power makes it hard when you get close....I have not looked at the BRB 2m transmitters... True, but yo...
by bpratt
Mon Sep 12, 2011 10:24 pm
Forum: Electronics
Topic: Frequency ranges and licensing
Replies: 6
Views: 2442

Re: Frequency ranges and licensing

I think the standard BRB transmits at 25mW from memory, but you can get a high power BRB tracker that outputs at 100mW so in theory this would need a license. As far as I know, all these use a 1/4wave antenna so they have a wide radiation pattern to make the transmitter non directional, therefore t...
by bpratt
Sat Sep 03, 2011 9:53 am
Forum: News & Events
Topic: Altusmetrum telemini
Replies: 9
Views: 1803

Re: Altusmetrum telemini

Alternatively it would probably be possible to modify it to transmit in a licence free section of the radio spectrum Version 1.0.1 of our firmware and associated ground station software just released allow setting the frequency to anywhere in the 70cm band. We have not fully characterized the filte...
by bpratt
Sat Sep 03, 2011 9:22 am
Forum: Whooshtronics
Topic: EasyAs Antenna
Replies: 7
Views: 2939

Re: EasyAs Antenna

I was however intrigued by the antenna arrangement and wondered, if it could be adapted from 406 MHz to 433Mhz. If anyone has any input in regards to dipole antenna geometry, calculations, efficiency or informed comment, then I would be happy to hear from you. 300 divided by the frequency in Mhz, m...
by bpratt
Wed Aug 10, 2011 10:07 am
Forum: News & Events
Topic: Neil Armstrong in Australia
Replies: 19
Views: 2637

Re: Neil Armstrong in Australia

Sheesh, they don't miss you :- An audience with Neil Armstrong Date: Wednesday 24 August Location: Sydney Convention and Exhibition Centre, Parkside Ballroom, Darling Harbour, Sydney Time: 5.30 pm to 8.30 pm Package options Member: A$195 including GST Member plus spouse or partner: A$390 including G...
by bpratt
Sat Jul 02, 2011 8:48 am
Forum: How's the Weather..?
Topic: Rocketry through the "Cloud"
Replies: 7
Views: 2477

Re: Rocketry through the "Cloud"

We wouldn't subtly try to get referral bonus'...... noooo never.... But if you did want to give me a referral bonus you could use my referral link here: http://db.tt/8XGNYhv :roll: :wink: :P I always disclose my connection(referral) when I point people with these things. Nothing wrong with getting ...
by bpratt
Fri Jul 01, 2011 8:44 pm
Forum: How's the Weather..?
Topic: Rocketry through the "Cloud"
Replies: 7
Views: 2477

Re: Rocketry through the "Cloud"

You guys are not getting a referral bonus or something from this ?

Surely you'd let us know in advance if that was the case. ;)
by bpratt
Fri Jul 01, 2011 8:38 pm
Forum: How's the Weather..?
Topic: New rocket workshop
Replies: 12
Views: 1833

Re: New rocket workshop

All those windows in there are going to be a problem when you turn it in to a home theatre. ;) Is that why it took you so long to build the calisto? Too busy watching "movies" than to build your rocket :lol: :wink: :lol: That could've been part of why it took so long to get it finished, n...
by bpratt
Fri Jul 01, 2011 9:56 am
Forum: How's the Weather..?
Topic: New rocket workshop
Replies: 12
Views: 1833

Re: New rocket workshop

All those windows in there are going to be a problem when you turn it in to a home theatre. ;)

That's going to be a great area for you to both run SR and build your rockets in ! :)
by bpratt
Sat Jun 11, 2011 5:44 pm
Forum: Queensland Rocketry Society
Topic: June Launch - 12 June, 2011
Replies: 28
Views: 4200

Re: 12 June 2011 Launch

Due to the unfavorable weather, this launch has been postponed until Sunday 19/06/2011. WXSIM text forecast for Logan Village, initialized at 5:00 PM 11 Jun, 2011 _______________________________________________________________________________ Tonight: Dense overcast. Patchy light fog. Rain likely i...
by bpratt
Wed Jun 08, 2011 5:35 pm
Forum: Queensland Rocketry Society
Topic: June Launch - 12 June, 2011
Replies: 28
Views: 4200

Re: 12 June 2011 Launch

Weather forecast for Saturday night/Sunday from the nearby Local weather station at this point of time is :- Saturday night: Cloudy in the evening, becoming mostly cloudy after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Low 9. Wind south-southwest around ...

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