Search found 2158 matches

by Viv
Fri Dec 30, 2011 6:50 pm
Forum: Off topic forum
Topic: My father
Replies: 10
Views: 2611

Re: My father

Joost

Sorry to hear that my friend, it takes time, so you should take some time just for yourself, but remember the good times and keep those close when you feel the pain....

All the best

Viv
by Viv
Tue Oct 25, 2011 8:36 pm
Forum: Unconventional, Multi-Mode and Hybrid Jets
Topic: Pressure Gain Combustion (Now Proven)
Replies: 96
Views: 20766

Re: Pressure Gain Combustion (Now Proven)

Ah Fedde! don't go spoiling my little joke now with too much information :wink: its a few years old now but still going strong by the looks of it :D Viv And still going, as a practical joke this has far exceeded my expectations ;-) I will have to write up the story of how it happened when I get tim...
by Viv
Mon Oct 24, 2011 8:27 pm
Forum: Off topic forum
Topic: Favorite Quotes
Replies: 32
Views: 7257

Re: Favorite Quotes

PyroJoe wrote:Marcus Aurelius : " Waste no more time arguing about what a good man should be. Be one. "
HA! too funny

Viv
by Viv
Mon Oct 24, 2011 7:30 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 2374

Re: Engineering Senior Design Project 2011

My apologies to you pulsejetgroup but some one is making a mess of this thread for you and that I do not think is very fair, I will not bother answering now in the hopes you can get the discussion back on topic and find some one else to help you with your project. Good luck, hope your project goes w...
by Viv
Thu Oct 20, 2011 3:52 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 2374

Re: Engineering Senior Design Project 2011

Mike, would you sort that out please.

Viv
by Viv
Thu Oct 20, 2011 3:39 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 2374

Re: Engineering Senior Design Project 2011

One of our constraints with this design is that we specified a 25 pound thrust engine or better in our proposal to the school. I should have mentioned that earlier. We're planning on having an engine built by Christmas, and the next semester will consist of running and instrumenting the engine. As ...
by Viv
Thu Oct 20, 2011 3:27 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 2374

Re: Engineering Senior Design Project 2011

Here is a better photo of that same engines failure mode, you can clearly see were the metal has been thinned down too far due to the metal spinning and how it has distorted in relation to the thicker section behind it.

Viv
by Viv
Thu Oct 20, 2011 3:20 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 2374

Re: Engineering Senior Design Project 2011

The pictures show distortion in a section of a nose cone made by the metal spinning process, the uneven metal thickness results in the distinct bands of distortion you can see, it has nothing to do with the materiel or grade used, the heat from combustion causes the rippling effect as the different ...
by Viv
Wed Oct 19, 2011 3:08 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 2374

Re: Engineering Senior Design Project 2011

Hi, For an engine pick a smaller engine that has more forum posts, that way you will tap in to more experience, very few people bother with big Lockwoods now as the bend is to expensive or hard to come by, they also have a tendency to "suck flat" the exhaust cone when built from carbon steel (it sof...
by Viv
Wed Oct 05, 2011 1:29 pm
Forum: Valveless pulsejet forum
Topic: homemade jet bathtub that was powered by a BBQ propane tank
Replies: 42
Views: 9412

Re: homemade jet bathtub that was powered by a BBQ propane tank

Haha mate you are taking this race far to seriously ;-) but i love it any way, they look wonderful, who did your welding?

Viv
by Viv
Sun Sep 18, 2011 8:46 pm
Forum: Rocket forum
Topic: Pulse jet rocket, first flight (ever?)
Replies: 9
Views: 3449

Re: Pulse jet rocket, first flight (ever?)

Hi Axel Do me a really big favor on your next test flight, could you arrange a good quality microphone and recording set up so that not only the take off is heard but more importantly the actual flight as it progresses up in height and speed, the Doppler rip as it gets going should be really some th...
by Viv
Sun Sep 18, 2011 5:09 pm
Forum: Rocket forum
Topic: Pulse jet rocket, first flight (ever?)
Replies: 9
Views: 3449

Re: Pulse jet rocket, first flight (ever?)

Hi Axel

Congratulations nice flight, looks like you have started a whole new sport all on your own ;-)
by Viv
Sat Sep 10, 2011 10:18 pm
Forum: Ramjet forum
Topic: stack flow or flu effect ramjet
Replies: 3
Views: 1177

Re: stack flow or flu effect ramjet

Ok, good luck then, ;-)

Viv
by Viv
Fri Sep 09, 2011 7:47 pm
Forum: Off topic forum
Topic: The other BD5
Replies: 19
Views: 3997

Re: The other BD5

Hi Forrest

Yes they do look a lot of fun and seem well engineered and well thought out, the performance per HP is startling to say the least

Viv
by Viv
Thu Sep 08, 2011 2:41 pm
Forum: Off topic forum
Topic: The other BD5
Replies: 19
Views: 3997

Re: The other BD5

Hi Forrest

Hard to find your post amongst all the spam today ;-( looking at that clip I can only think these BD5s were not a lot of fun to ride (drive?) fast ;-)

Viv