Search found 1055 matches

by mk
Wed Dec 27, 2006 7:06 pm
Forum: Valveless pulsejet forum
Topic: New and Improved Lady Anne
Replies: 179
Views: 56713

Re: Sound File and Waveforms

Larry Cottrill wrote: Man, that is a harmonic-rich sucker!
Unfortunately, it is not. "HF ringing" -- to paraphrase you -- was well surpressed. (!
by mk
Tue Dec 26, 2006 10:56 am
Forum: Valveless pulsejet forum
Topic: k1 jam jar?
Replies: 11
Views: 4525

The metal jam jar experiments (click on the light blue coloured text before the brackets to follow the link) topic contains some information and experimental outcome of Reynst combustors running on longer-chained hydro-carbon fuels. Be aware that it is most favourable not to use glass jars anymore. ...
by mk
Sun Dec 24, 2006 11:16 am
Forum: Valveless pulsejet forum
Topic: Mike' Mini kenny build bits
Replies: 27
Views: 11962

Looks so cool!
by mk
Sat Dec 23, 2006 2:28 pm
Forum: Valveless pulsejet forum
Topic: New and Improved Lady Anne
Replies: 179
Views: 56713

You might find it interesting that a likely OCF has been moved from the former 324 Hz to 381 Hz (2 samples; 3rd is present, but vanishes in noise). The above beeing valid, of course, when comparing the latest record of "James D" to records in the first "Anne Booleyn" thread, which depict the engine ...
by mk
Fri Dec 15, 2006 10:13 pm
Forum: Valveless pulsejet forum
Topic: TP180-18 starting to take shape!!
Replies: 57
Views: 17752

Re: re: TP180-18 starting to take shape!!

193hz is pretty good too right?? Eric what is the acoustic length of the TP180-18? with a +2" intake... That was just one of the "sub-frequencies", which was rather easily oserved, however, OCF (here called f1, of 132.02 Hz ) is of your interest, due it characterises operation overally.
by mk
Fri Dec 15, 2006 4:00 pm
Forum: Valveless pulsejet forum
Topic: TP180-18 starting to take shape!!
Replies: 57
Views: 17752

re: TP180-18 starting to take shape!!

"NickC", Very nice going! Congratulations that you got the engine to run! Even nicer it is, that you achieved it with diesel. Cool! For analysis I found video #4 most representative. However, I have not (had) the time to have a look at all of the videos (yet), but the following can be stated: OCF : ...
by mk
Tue Dec 12, 2006 3:21 pm
Forum: Valveless pulsejet forum
Topic: Can't get 'em to run.
Replies: 17
Views: 5848

Re: re: Can't get 'em to run.

Heath Daily wrote:ISpecifically the "Lockwood-Hiller puls-jet calulator" [...]
This one basically only scales the patent engine dimensions. Nothing more nothing less.
Someone should really delete that file, because it is rather misleading.
Well, it dates back to the time I was rather new to the subject.
by mk
Mon Dec 11, 2006 6:40 pm
Forum: Valveless pulsejet forum
Topic: TP180-18 starting to take shape!!
Replies: 57
Views: 17752

re: TP180-18 starting to take shape!!

Because you are in a hurry, you may want at least try to borrow ( a ) a compressor and/or, ( b ) a " hot air gun ". Both are likely to make your live wrt. starting easier. Instead of spark plug ignition, you could either try ( a ) Eric's suggestion of heating up a single spot of the combustion chamb...
by mk
Fri Dec 08, 2006 5:53 pm
Forum: Tools and Construction
Topic: Got me a new mill!
Replies: 23
Views: 10266

re: Got me a new mill!

Cool! This one looks quite wicked.

Thanks.
by mk
Fri Dec 08, 2006 1:56 pm
Forum: Valveless pulsejet forum
Topic: Jims Little 3 Lb Thermojet
Replies: 297
Views: 115062

re: Jims Little 3 Lb Thermojet

As suspected ( red letters ) before, my extracted closed pipe frequencies are more and more seeming off . Hmmm, learning by doing. I have to check and evaluate that again. Unfortunately I do not have much time to spend on pulsed combustors right now. However the lower end open pipe frequencies, toge...
by mk
Fri Dec 08, 2006 1:49 pm
Forum: Valveless pulsejet forum
Topic: New and Improved Lady Anne
Replies: 179
Views: 56713

re: New and Improved Lady Anne

Interesting evidence, that Bill got the engine to operate self-aspirated with the inlet that much in front of the combustion chamber. Even though thrust output was reduced heavily, and dimensional sdaption was demanded.
Well, and note the heat distribution. Hmmm...
by mk
Fri Dec 08, 2006 1:29 pm
Forum: Tools and Construction
Topic: Got me a new mill!
Replies: 23
Views: 10266

re: Got me a new mill!

Yes, pretty good. Do you have a complete picture of the motorcycle Anders?
by mk
Wed Dec 06, 2006 3:33 pm
Forum: Valveless pulsejet forum
Topic: Jims Little 3 Lb Thermojet
Replies: 297
Views: 115062

re: Jims Little 3 Lb Thermojet

##### Note because I cannot edit my post anymore: The formerly send soundfile analysis might be in error wrt. frequencies of larger order. Especially the closed pipe frequencies may be affected! As said, it was my first attempt. ##### From the new video provided by "mag", the OCF peaks at 219.63 Hz....
by mk
Tue Dec 05, 2006 7:35 pm
Forum: Valveless pulsejet forum
Topic: Jims Little 3 Lb Thermojet
Replies: 297
Views: 115062

Re: re: Jims Little 3 Lb Thermojet

To all: I am not in the position to give a complete lay-down of any engine. But as presented a bove I can try to extract some frequencies out of a record. As mentioned, the results posted above were my first approach of a more detailed analysis. He lost overall amplitude, due to losses in harmonics ...
by mk
Tue Dec 05, 2006 6:59 pm
Forum: Gas turbine forum
Topic: Been a while - new project, T04 Gas Turbine.
Replies: 215
Views: 146925

re: Been a while - new project, T04 Gas Turbine.

Some nice piece of workmanship! Cool.