Search found 408 matches

by marksteamnz
Sun Apr 11, 2010 6:42 am
Forum: Rocket forum
Topic: Thermite Rocket?
Replies: 12
Views: 17181

Re: Thermite Rocket?

Quote (corrected) "why not try aluminium sulfide with zinc oxide"

Because you have as much knowledge of energetic chemistry as a lamp post

You might as well ask "why not try concrete with a dead fish"
by marksteamnz
Fri Jan 29, 2010 10:05 pm
Forum: Jet Vehicles, All Types
Topic: my valveless jet kart
Replies: 9
Views: 7396

Re: my valveless jet kart

Rocket Man wrote:A leaf blower would be better than that jet engine!!! Why put a video online that shows a lot of failure and no success?

Words fail me
by marksteamnz
Sat Jan 16, 2010 9:35 am
Forum: Rocket forum
Topic: Peroxide rocket wall feed of oxidizer
Replies: 1
Views: 2524

Peroxide rocket wall feed of oxidizer

I've been mentally designing (insomnia the tinkerers sketch book)a methanol 90% peroxide rocket and have been speculating on using the cylindrical wall of the combustion chamber drilled with multiple tangential jets to feed the peroxide. Provides vigorous circulation, some oxidizer pre heat, fabrica...
by marksteamnz
Sun Nov 22, 2009 7:44 pm
Forum: Rocket forum
Topic: Steam rocket project
Replies: 86
Views: 38493

Re: Steam rocket project

http://www.rocketbelts.americanrocketman.com/steam.html

Another Steam rocket link. Applogies for not posting earlier but a hard drive crash removed all my interwho bookmarks and I just stumbled across again this today.
Cheers
by marksteamnz
Thu Oct 01, 2009 4:39 am
Forum: Rocket forum
Topic: Steam rocket project
Replies: 86
Views: 38493

Re: Steam rocket project

From a/the previous thread "Looks like a lot of fun. I'm curious about the plumbing after the valves. If the valves on each tank are smaller bore than the piping chamber and nozzle after them then even when fully open the chamber isn't doing anything. Have you considered an individual expansion cone...
by marksteamnz
Wed Aug 26, 2009 10:16 pm
Forum: Valveless pulsejet forum
Topic: Collected works of F. H. Reynst
Replies: 9
Views: 3879

Re: Collected works of F. H. Reynst

There's a buried thread somewhere about this. Hard bound scanned copies (not original, print only on one side of the pages) are worth about US$25 plus postage. No one was interested in mine as multiple copies were on ebay for similar in the US so postage was cheaper. Bites sometimes being at the end...
by marksteamnz
Thu Jul 09, 2009 8:42 pm
Forum: Rocket forum
Topic: Planning for a large NOX engine
Replies: 11
Views: 5877

Re: Planning for a large NOX engine

Great vids there Carolynne! I will take my time and figure out exactly what I want to know, then I will email you. Viv, a steam powered rocket would be fun but somewhat inconvenient to use on a frozen lake since it will need massive amounts of heat to get up to pressure. It is very interesting none...
by marksteamnz
Mon Jun 22, 2009 9:32 pm
Forum: Rocket forum
Topic: Planning for a large NOX engine
Replies: 11
Views: 5877

Re: Planning for a large NOX engine

laffin-gas.com Read the blog
Carolynne, and her team are doing good stuff and are friendly and willing to share.
Cheers
by marksteamnz
Wed Feb 04, 2009 7:40 am
Forum: Rocket forum
Topic: Rocket How To - READ ME FIRST
Replies: 1
Views: 6940

Re: Rocket How To - READ ME FIRST

Solid propellant rockets The basic types available to the amateur constructor are Sugar (fuel) with potassium nitrate, KNO3 or Sodium nitrate NaNO3 (Oxidizer) also known as candy propellant. The propellant can be improved by using specific sugars ie dextrose. The components can be dry or wet mixed o...
by marksteamnz
Thu Oct 16, 2008 7:01 am
Forum: Valveless pulsejet forum
Topic: Question?
Replies: 7
Views: 2272

Re: Question?

You have to get the water in ( a lot of water) at a pressure higher than it is going to come out if you are looking at feeding a jet on a continuous basis. Or you need a strong vented container to fill with water and then seal. Heat in = minutes, Thrust = seconds. Mass flow vs heat transfer is a bea...
by marksteamnz
Sat Oct 11, 2008 8:00 am
Forum: Unconventional, Multi-Mode and Hybrid Jets
Topic: PJ's for demining
Replies: 13
Views: 7508

Re: PJ's for demining

Thanks for the links Viv. Very interesting. If I ever get my 60 hp monotube steam car boiler back in action I may have to meet you for a mine bake off. Opps I've given my idea away! :D Not really just something I ponder on mainly when I trip over the thing in the work shop. Lots of heat at high velo...
by marksteamnz
Thu Oct 09, 2008 7:01 am
Forum: Unconventional, Multi-Mode and Hybrid Jets
Topic: PJ's for demining
Replies: 13
Views: 7508

PJ's for demining

Hi Viv The links on your post mentions demining. Can you talk some more about it or is it still early days? Guessing you would be using a pulse ram (Big Grin) but optimised to be the noisiest vibratingist thing on the planet. Am I close! Seriously in old mine fields with over growth etc the idea of ...
by marksteamnz
Tue Sep 23, 2008 7:28 am
Forum: Rocket forum
Topic: Mini N2O gas canisters?
Replies: 16
Views: 12166

Re: Mini N2O gas canisters?

You were told fairy tales. www.laffin-gas.com/ is the reality. I think there is a kind of dragster that is powered by something similar, from what I was told it basically has a tinfoil tube, at one end N2O is injected and mixed with old chip fat, then at the other end there is a specially shaped ste...
by marksteamnz
Fri Sep 12, 2008 10:02 pm
Forum: Rocket forum
Topic: Someone has to try this
Replies: 34
Views: 17135

Re: Someone has to try this

Re H2O2
My sticky at the start used to be about 3 times as long and covered monopropellents but was truncated on transfer to the new forum. Unfortunately I don't have a copy of what I wrote but I'm sure it was erudite and heart warming :)

Cheers
Mark