Search found 2158 matches

by Viv
Sat Jan 29, 2011 9:58 pm
Forum: Tools and Construction
Topic: Basic Gasifier Build
Replies: 91
Views: 1669066

Re: Basic Gasifier Build

Hi Joe

Will you continue to add fuel in stick form or go for chipping it this time to make it more uniform?

Viv
by Viv
Wed Jan 26, 2011 3:49 pm
Forum: Pressure jet forum
Topic: The Impulse jet engine
Replies: 2
Views: 2905

Re: The Impulse jet engine

yeah its a jet engine as with no moving parts and it also have the toroidal combustion chamber in it. it is formed in a most thick cylndricl side wal of the engine housng And it probably will not work due to combustion pressure instability and distribution around the total length of the chamber, an...
by Viv
Wed Jan 26, 2011 3:38 pm
Forum: Pressure jet forum
Topic: 130R movie for Pulse-Jets.com
Replies: 5
Views: 5193

Re: 130R movie for Pulse-Jets.com

thanks for posting this movie. it helped my in my project which is near to the completion stage thanks Hi Hughe A pleasure, I have a lot of other videos too for the 130R and 20 pounder versions of the L shape engine, also the later inline versions of both as burners, some of those I will publish on...
by Viv
Wed Jan 26, 2011 3:34 pm
Forum: Pressure jet forum
Topic: increase the thrust whit to modification
Replies: 12
Views: 5469

Re: increase the thrust whit to modification

viv, could you describe or post some pic of that where you face the prblem i mean the stage at which the result is poor Hi Hughe The problem with this type of modification placed directly behind the chamber convergent section (to the tailpipe) is that it affects the wave timing around the bottom of...
by Viv
Sun Jan 09, 2011 7:00 pm
Forum: Pressure jet forum
Topic: The Impulse jet engine
Replies: 2
Views: 2905

The Impulse jet engine

I have always had a soft spot for the impulse jet engine of Robert Chester, its a toroidal design with the combustion chamber incorporated in to an airfoil duct as an annular chamber, its a pressure jet derivative as one embodiment uses a heat exchanger coil and nozzle arrangement to induce intake a...
by Viv
Fri Dec 31, 2010 5:58 pm
Forum: Off topic forum
Topic: Happy new year, Bonne année
Replies: 0
Views: 1256

Happy new year, Bonne année

Happy new year to all my friends were ever you are in the world, Bonne année à tous mes amis

Viv et Nicole
by Viv
Fri Dec 31, 2010 2:30 am
Forum: Valved pulsejet forum
Topic: pulsejet combustion in microgravity
Replies: 21
Views: 6346

Re: pulsejet combustion in microgravity

Hi, Yes Hydrogen could be tricky to handle but may I suggest you turn the problem on its head for a moment and attack it from another direction, How much data are you going to collect? and how? That may seem counter intuitive but it would give you an idea of how long your experiment had to run, this...
by Viv
Mon Dec 20, 2010 11:35 pm
Forum: Valved pulsejet forum
Topic: pulsejet combustion in microgravity
Replies: 21
Views: 6346

Re: pulsejet combustion in microgravity

The most elegant and simple of experiments for the vomit comet is probably going to be a jam jar with a jell type fuel, should also be the easiest to safety proof

Viv
by Viv
Mon Dec 20, 2010 3:20 pm
Forum: Tools and Construction
Topic: CAD Programs - Some free tools, and links.
Replies: 10
Views: 9286

Re: CAD Programs - Some free tools, and links.

Hi People Found this in my travels today "CADuntu has a new name: LibreCAD" this is now also in Ubuntu so easy to install. (but try not to confuse it with LibreOffice the free and open source office suit) "CADuntu is a 2D CAD drawing tool based on the community edition of QCad ported to Qt4 and work...
by Viv
Sun Dec 19, 2010 2:01 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 52065

Re: Planing for next years speed weekend, (1/2 scale Argus)

Hi Erik As I have stood next too and climbed all over a real Argus while it was still bolted to the V1 can I go out on a limb and ask why half scale and why not build a full scale one? (or the smaller Porch version) how big is this yacht you have lined up? we know a full scale Argus works (and its r...
by Viv
Fri Dec 17, 2010 3:27 pm
Forum: Valved pulsejet forum
Topic: pulsejet combustion in microgravity
Replies: 21
Views: 6346

Re: pulsejet combustion in microgravity

Hi, over the years I have read a few papers on combustion in drop chambers (tubes) to simulate microgravity combustion so the subject is investigated and published, I would start there with a simple search, your other assumptions are correct for how combustion takes place in microgravity and my own ...
by Viv
Sat Dec 11, 2010 2:35 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 52065

Re: Planing for next years speed weekend, (1/2 scale Argus)

Hi All

In the Argus there are some aerodynamic flow straighteners mounted just behind the valve grid, do you or Bob have those fitted to your engines? it may cause the heating pattern you see

Viv
by Viv
Thu Dec 09, 2010 9:10 pm
Forum: Gas turbine forum
Topic: Project Radial Jet from a 105mm Holset
Replies: 40
Views: 29643

Re: Project Radial Jet from a 105mm Holset

Hi Mate

Sorry the interest is there but even though I follow this thread I am just too busy with work projects at the moment to get involved in posting, but rest assured people are following ;-)

Viv
by Viv
Mon Nov 22, 2010 2:14 pm
Forum: Off topic forum
Topic: freak snow
Replies: 109
Views: 17676

Re: freak snow

WebPilot wrote: still no snow ...
I figure that comment is out of date now Forrest ;-) today we have forecast all three, snow, freezing rain followed by rain, was -13c last night but now only -5

Viv