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Member Since 11 May 2003
Offline Last Active Apr 13 2012 04:23 PM

Topics I've Started

Idea for Hybtrid rocket engine

20 June 2005 - 10:19 AM

Hello there,

After a long absence from rocketry, and after going through several large changes in my life, I have recently started firing 'C' class rockets again.

Now as you probably know, I am a tinkerer, who likes to DIY it, so I am thinking of building a hybrid engine (N2O and acrylic fuelled) to replace 'C' class engines, with the intention of eventually building larger engines.

I have read up on the web, and have produced a series of sketches, which are shown below. In addition, I have produced others, but these are either obsolete or irrevelant at the present time

My question is this... Ignoring factors such as regression rate, and gas flow, is there any hance of this engine working statically?

(sorry for the large filesizes, but these are A4 sketches, scaled to 50%)

Page 1

Page 2

Page 3

Page 4

Virus Warning

30 October 2004 - 12:58 PM

Hi guys. Just running my new virus scanner and it looks like I have an infestation. :angry: Some of you guys are in my address book so please check for these:

W32/Parite B (this is infestation, but doesn't appear dangerous)
At least one trojan (these appear to have been contained)

I believe that these got into my system via ActiveX scripts.

1. Please raise you internet settings to High (or AT LEAST disable activeX)
2. Run a comprehensive virus scanner (somewhat worringly, NORTON picked up NONE of these.
3. Don't hate me too much

Guess who's back

19 February 2004 - 05:47 PM

Hi everyone,

It's been an age since I last posted, so I thought I'd give an overview:

1. Now in GCSE's, :( so little time for pyro, due to shooting team commitments, revision, course work, and all the rest of it.

2. Site's revamp getting done SLOWLY

3. Finished with fountains. This years projects willbe bigger ball mill, and rockets.

4. did that KCLO4 ever come to light?

5. This year I think I will be attempting some basic synthesis- any tips anyone?

Great to be back


Fully automatic weapon fire

18 December 2003 - 10:10 AM

Hi, This may be outside the scope of this forum, but here goes;

In films there are frequently sequences where weapons or firing fully automatic bursts with muzzle flashs. However, with blanks you must fit a bfa to the muzzle in order to reach the required pressure. This would remove the flashes however. With live ammo th flashes would be there, but there would be lead flying everywhere.
how do they do that? Do they use choked barrels or is there sumat I am missing here?

Multi-shot Cakes To Be Restricted

28 October 2003 - 07:15 PM

In my local TV news (points west at 6:30pm, BBC1) there was a report on firework battles in Birstol. What followed was footage of youths, wearing hoods, igniting multi-shot cakes while pointing them at each other. After this their was a man (from HSE?) going on about 25m distances, needing a football field in your back garden to use them safely (my garden is longer than 25m by quite some distance, and my house is surrounded by acres of farmland, and I have the farmers permission to use the land.) I felt so strongly about the council's moves to ban them that I e-mailed Points-West with the email that is displayed below;

"Dear Madam or Sir,

I watched your report on Multi-shot Fireworks in Bristol with some amount of concern.

I have enjoyed fireworks in displays (whether at my home or professionally fired) as long as I can remember, and I particularly enjoy seeing a Multi-Shot set-piece going off.

I also feel that these are much safer than having many small fireworks, as with the multi-shot barrages there is only one point of ignition, so once the fuse has been lit you retreat to a safe distance, rather than having to go back and forth between the safe area and the firing area to light individual devices.

As with all things that require responsibilty, I know that there will be a small minority of people that will misuse them. Banning them, however, often increases the problem, as people will turn to the black-market and crime to get these fireworks.

Cars are very dangerous things, and people misuse them (as in drink-driving) and people get killed and injured in much higher proportions while using or going about their business around cars then with fireworks. Even with these statistics their would be no mention of banning or restricting their use or sale.

Add to these risks the fact that cars are one of the major contributors towards global warming and climate change, you begin to realise that cars really are lethal devices, whether compared to any fireworks or just being considered alone.

Yours Sincerly,

Alexander E-Smith,
(Aged 14)
Tetbury, Glos"