Search found 1124 matches

by Lamp
Wed Oct 02, 2019 9:49 am
Forum: How's the Weather..?
Topic: TRA 20 Year Pin...
Replies: 6
Views: 590

Re: TRA 20 Year Pin...

Congratulations Cato! :D
by Lamp
Wed Oct 02, 2019 9:45 am
Forum: Scratch Built
Topic: Free Form Fins - CP Issues - OpenRocket
Replies: 6
Views: 494

Re: Free Form Fins - CP Issues - OpenRocket

If your rocket is short and squat I think your design is just in the "sweet spot", but if your rocket is longer, SpaceManMat might be right. You can test for this if you make small progressive changes in each direction and graph the results of point location Vs. stability margin (say movin...
by Lamp
Fri Aug 30, 2019 12:44 pm
Forum: Low Powered Rocketry
Topic: 56er, ignite ork files?
Replies: 3
Views: 734

Re: 56er, ignite ork files?

Hi Pete, There are probably no pre-done model files. A simple rocket like that would not take long to model, Open Rocket will most likely have most if not all of the materials in the library. The most important things in a model are the CP, which the model will give you from the sizes of all the ext...
by Lamp
Fri Aug 30, 2019 12:16 am
Forum: Low Powered Rocketry
Topic: Question for L3 flyers
Replies: 5
Views: 1249

Re: Question for L3 flyers

My older sisters boyfriend at the time (called Walter) was into model rocketry and I went to a launch with him at Caulfield racecourse in 1973. After that I saw an advertisement in a comic for Centuri Rockets. I cut out the form and sent it off to get a catalog which arrived a few weeks later. I ord...
by Lamp
Wed Aug 28, 2019 10:45 am
Forum: Australian Rocketry
Topic: Almost all motors on backorder
Replies: 26
Views: 3642

Re: Almost all motors on backorder

In my specific case I often order motors I want YEARS in advance. The L935 and M2245 I flew at THUNDA were purchased in June of 2015. TLDR; if you want something specific order it well in advance when AusRocketry announces a new motor order! I do this too Drew, I still have motors that are 5 years ...
by Lamp
Thu Aug 01, 2019 11:29 am
Forum: Mid/High Powered Rocketry
Topic: Square Mid Power Rocket
Replies: 6
Views: 718

Re: Square Mid Power Rocket

For flat attachment, you could always go TTW running the fin against the inside of the body. No need then to have the fin go all the way across to the other fin. If you keep the tab to about 10mm with roughened surfaces you would get a really strong attachment. :wink:
by Lamp
Wed May 01, 2019 9:46 am
Forum: Thunda Down Under 2019
Topic: Thunda Down Under 2019 Photo and Video Thread
Replies: 34
Views: 3843

Re: Thunda Down Under 2019 Photo and Video Thread

Thanks for putting that together and posting it George, it is superb!
by Lamp
Tue Apr 30, 2019 10:30 pm
Forum: Thunda Down Under 2019
Topic: Thunda Down Under 2019 Photo and Video Thread
Replies: 34
Views: 3843

Re: Thunda Down Under 2019 Photo and Video Thread

air.command wrote:Hi guys,

I am looking for some information on some of the rockets that were flown at Thunda.

I have some info already, but I am still missing the following:

Karl's 1/4 scale V2 ... motor?



In addition to my pm George, Karl and Noel flew the 1/4 scale V2 on an Aerotech N2000W
by Lamp
Fri Apr 26, 2019 10:28 pm
Forum: Thunda Down Under 2019
Topic: Thunda Down Under 2019 Photo and Video Thread
Replies: 34
Views: 3843

Re: Thunda Down Under 2019 Photo and Video Thread

a couple more...
by Lamp
Fri Apr 26, 2019 10:20 pm
Forum: Thunda Down Under 2019
Topic: Thunda Down Under 2019 Photo and Video Thread
Replies: 34
Views: 3843

Re: Thunda Down Under 2019 Photo and Video Thread

Some more photos from thunda...
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DSC_1989.jpg (48.53 KiB) Viewed 1142 times
by Lamp
Fri Apr 26, 2019 7:40 pm
Forum: Thunda Down Under 2019
Topic: Thunda Down Under 2019 Photo and Video Thread
Replies: 34
Views: 3843

Re: Thunda Down Under 2019 Photo and Video Thread

Congratulations OTT, it was a spectacular flight!

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DSC_2294.jpg (10.63 KiB) Viewed 1154 times
by Lamp
Sun Apr 14, 2019 7:09 pm
Forum: Thunda Down Under 2019
Topic: Telemtry
Replies: 6
Views: 380

Re: Telemtry

I am looking at flying with one of the new Featherweight GPS systems.
by Lamp
Sun Apr 14, 2019 8:20 am
Forum: Thunda Down Under 2019
Topic: Any experiences with checked in airline luggage - rocket and AV bay
Replies: 7
Views: 503

Re: Any experiences with checked in airline luggage - rocket and AV bay

Also, unless they have changed what gets detected, when you fly back do not worry about black powder or AP residue on your clothes if you get the explosives scan thing. Some years ago I was scanned after a launch in WA, I was sure the alarms would go off...but nothing. The security guy told me they ...
by Lamp
Sat Apr 13, 2019 9:29 am
Forum: Mid/High Powered Rocketry
Topic: L1 Build - Upgraded Loc IV
Replies: 53
Views: 3889

Re: L1 Build - Upgraded Loc IV

The on-board flight video is excellent! Regarding the altimeters, I'm pretty sure the RRC2+ altimeters are Mach immune so you will have no problems flying through the Mach transition with these. I'm not sure about the Co-Pilot though...I would use this only for sub-sonic flights up to the Mach trans...
by Lamp
Fri Apr 12, 2019 11:17 pm
Forum: Thunda Down Under 2019
Topic: Need to buy or borrow a CTI l1395 or l1355 for a two stage flight.... that just maybe is crazy and well thought out enou
Replies: 5
Views: 396

Re: Need to buy or borrow a CTI l1395 or l1355 for a two stage flight.... that just maybe is crazy and well thought out

Thanks Matthew,
If the mootor lights with an ematch it has the pyrodex in the top grain, if it has a larger pyrogen covered igniter then it does not. I saw an email from Noel that said they will introduce some increased drag to decrease the altitude and use an M840 they have in the sustainer.

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