Search found 2009 matches

by SpaceManMat
Wed May 02, 2018 5:29 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 32
Views: 876

Re: Don't Debate This

Forward closure does not produce thrust, however if it buts up against a bulk head in the rocket then inertia from the rocket will in part push back against the closure and lessen the stress, but I would not count on it. I’m thinking this should be rated for pressure plus thrust although reality is...
by SpaceManMat
Wed May 02, 2018 5:15 pm
Forum: Western Australian Rocketry Society
Topic: 2018 Season Opener - 29th April - Grass Valley
Replies: 14
Views: 516

Re: 2018 Season Opener - 29th April - Grass Valley

Don't blame ya! I had to hitch the trailer Monday morning to pick a set up for Jack's birthday, got home and dumped the boxes for Bec and 'Grandpa' to play with. I went to work, whistling. Smart man! Ha. Look you just have to pretend all those poles are actually body tubes, then it’s much more exci...
by SpaceManMat
Wed May 02, 2018 9:02 am
Forum: Western Australian Rocketry Society
Topic: 2018 Season Opener - 29th April - Grass Valley
Replies: 14
Views: 516

Re: 2018 Season Opener - 29th April - Grass Valley

Yeah, Drew ain't setting that up every time! We need to find a way to pin it down. Get 6 kids all on an up swing at the same time and it starts to tip. Getting a good workout then. Some have holes in the legs for pegging it to the ground. If not then drill your own. Obviously not your standard tent...
by SpaceManMat
Wed May 02, 2018 8:56 am
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 32
Views: 876

Re: Don't Debate This, Too

If you’re thinking of winding then it wonuld not be too difficult to build your own machine for this.
by SpaceManMat
Wed May 02, 2018 8:35 am
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 32
Views: 876

Re: Don't Debate This, Too

The liners job is just to insulate the case isn’t it and keep the grains in place? Case and closures must keep gasses must keep gasses in otherwise you have 3000 degree air acting like a cutting torch. Thinking of smaller loads that I’m more farmilar with, while those do appear to use the liner as a...
by SpaceManMat
Tue May 01, 2018 10:38 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 32
Views: 876

Re: Don't Debate This

Q: Does the rocket motor casing need to be gas-tight AND withstand the forces exerted by the motor, OR does it only need to withstand the latter? Ok here’s my thoughts on this. The gas inside the the motor is being expelled at a rapid rate. So at least in part the thrust being applied to the motor ...
by SpaceManMat
Tue May 01, 2018 9:25 pm
Forum: Western Australian Rocketry Society
Topic: 2018 Season Opener - 29th April - Grass Valley
Replies: 14
Views: 516

Re: 2018 Season Opener - 29th April - Grass Valley

drew wrote:
SpaceManMat wrote:What’s with the swing set?


We have a fair amount of children that come to launches these days. You want to know the best way to keep your nearly 4 year old off the flight line? Build him a swing set.


Mine usually find a mud pit :roll: Is it permanent or someone has to set it up each time?
by SpaceManMat
Mon Apr 30, 2018 5:52 pm
Forum: Western Australian Rocketry Society
Topic: 2018 Season Opener - 29th April - Grass Valley
Replies: 14
Views: 516

Re: 2018 Season Opener - 29th April - Grass Valley

Looks like a lot of fun but windy.

What’s with the swing set?
by SpaceManMat
Sun Apr 29, 2018 12:55 pm
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 32
Views: 876

Re: Don't Debate This, Too

Welcome back Mike! Hadn't heard from you for a while and I had wondered what you were up to. Looks good so far. Looking forward to see where you get to. Have you considered using tapered fins, thicker at the root and thinning towards the tip? I’m with OTT on tapered fins. I think Ape offeres CNC cu...
by SpaceManMat
Sat Apr 28, 2018 11:28 am
Forum: Mid/High Powered Rocketry
Topic: Don't Debate This, Too
Replies: 32
Views: 876

Re: Don't Debate This, Too

8) awesome, can’t wait for this to fly. So Soric core is used to lighten the fin. How thick is the core and how thick is the fin? Also I assume core is smaller than fin as you don’t want to expose edge of core to supersonic flow. Can you please explain their construction? Composite case = experiment...
by SpaceManMat
Sat Apr 28, 2018 10:48 am
Forum: Other Australian Clubs?
Topic: STARS
Replies: 1
Views: 172

Re: STARS

Contact AMRS info@rocketry.org.au

Blake and Dave has extensive experience dealing with bureaucrats and all the intricacies of setting up and running a club.

All the best.
by SpaceManMat
Thu Apr 26, 2018 9:19 pm
Forum: Electronics
Topic: Altimeter Testing
Replies: 3
Views: 251

Re: Altimeter Testing

You can test it at ambient pressure. Turn it on today and see what pressure it reads. Find out what the BOM says the pressure is. Turn it on another day and see that it is changed and has trended correctly after checking with BOM again. Or check the pressure at the top and bottom of a hill / mountai...
by SpaceManMat
Wed Apr 25, 2018 12:35 am
Forum: Low Powered Rocketry
Topic: Flying Low Power in Victoria
Replies: 8
Views: 483

Re: RE: Re: Flying Low Power in Victoria

If you have AMRS membership/certfications will this be recognised with Tripolli australia? I'm pretty sure you need to be a paid up member of either Tripoli or TRAAU to fly HPR at Serp. Your AMRS certification will be recognised. Not sure about LPR Time/distance wise it's a pretty similar: 1:47 and...
by SpaceManMat
Tue Apr 24, 2018 6:39 pm
Forum: Self Introductions
Topic: Hello Again
Replies: 6
Views: 382

Re: Hello Again

SpaceManMat wrote:Hey Mike great to have you back at the forums again. It been far too long.

Did you see at this years BALLS a new N record was set with the N5800?


Here’s the link
http://www.rocketryforum.com/showthread ... ight=N5800
by SpaceManMat
Tue Apr 24, 2018 5:21 pm
Forum: Queensland Rocketry Society
Topic: QRS Westmar Weekend Dates
Replies: 14
Views: 816

Re: QRS Westmar Weekend Dates

Couple of shots of mine https://farm1.staticflickr.com/944/40773703325_59a66b8b5a_c.jpg Night Fury - I297 Skidmark https://farm1.staticflickr.com/836/41663846181_da1d947fef_c.jpg Purple Parrot - I216 Blake’s L launch https://farm1.staticflickr.com/852/41663741881_06dfc962bd_z.jpg Blake

Go to advanced search