Search found 1241 matches
- Fri Mar 27, 2009 4:10 pm
- Forum: Valveless pulsejet forum
- Topic: Mike's Build Log
- Replies: 441
- Views: 331486
Re: Mike's Build Log
Here's the triple. I think I want to bump up the intake dia, considering how well the upscale went at a little higher confinement ratio. Mike Just a couple of thoughts (which you may have already considered): 1. The rendering seems to depict the intake and exhaust ends adjacent to each other; this ...
- Wed Mar 25, 2009 5:59 pm
- Forum: Valveless pulsejet forum
- Topic: Mike's Build Log
- Replies: 441
- Views: 331486
Re: Mike's Build Log
Mike:Mike Everman wrote:Yep, and also a free power turbine, and also a whirly motor.metiz wrote:
Hmm revamping the tailpipe into one with an integrated augmenter?
Nice job!!
Looks like you could augment both ends.
Bill
- Mon Feb 16, 2009 6:53 pm
- Forum: Valveless pulsejet forum
- Topic: "Thunderchine" 55 lb thrust pulsejet plans
- Replies: 142
- Views: 124332
Re: "Thunderchine" 55 lb thrust pulsejet plans
Hello M.:
Can you provide us with your expectations regarding TSFC, operating frequency and acoustic temp?
Also, has a first article been built and tested yet?
Bill H.
Can you provide us with your expectations regarding TSFC, operating frequency and acoustic temp?
Also, has a first article been built and tested yet?
Bill H.
- Fri Feb 13, 2009 4:09 am
- Forum: Valveless pulsejet forum
- Topic: Back with the BIG LADY
- Replies: 112
- Views: 53171
Re: Dance of the Thunderchines
Do I hear a clock ticking?......?......?......?......?......?......?......?......?......?milisavljevic wrote:Long promised, often delayed...
M.
- Sat Feb 07, 2009 2:56 am
- Forum: Tools and Construction
- Topic: dB turns your Iphone in to a db meter!
- Replies: 7
- Views: 7304
Re: dB turns your Iphone in to a db meter!
How cool is that app for the Iphone, almost like they knew about us ;-) http://www.faberacoustical.com/products/iphone/db/ Viv I can't believe how advanced this product really is. Here's a link that's totally off the wall: http://www.gizmag.com/bullet-flight-100--the-us15-iphone-app-for-snipers/108...
- Wed Dec 17, 2008 3:19 am
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2940767
Re: dynamic modeling of a strip valve
HI Forrest: We haven't talked in quite a while. Thanks again for your interest in my project of some years ago (a duplicate of the now-famous Kentfield motor, with 4 intakes); your analysis and subsequent positive recommendation provided me with incentive to build a successful version of my own, and...
- Wed Dec 17, 2008 3:04 am
- Forum: Tools and Construction
- Topic: THRUST RIG
- Replies: 7
- Views: 6527
Re: THRUST RIG
I have tried various methods to measure thrust , none of them “as yet” really work well , The photo shows something I am considering, I have no intention of starting the great thrust rig argument up again, just would like some feedback to see if it is worth doing Hi Grim: I can assure you (and Mike...
- Tue Dec 16, 2008 3:37 am
- Forum: Valved pulsejet forum
- Topic: Tenney's rotary Dynajet
- Replies: 15
- Views: 13182
Re: Tenney's rotary Dynajet
Hey Bill how are you? hope all is well with you and yours. Hi, back to you--and Happy Holidays to you (and the rest of our fellow PJ enthusiasts)! I wish I could report that all is well, but the US financial situation and a puffed-up, uncaring, BMW M-series driving financial officer have created a ...
- Tue Dec 16, 2008 12:23 am
- Forum: Valved pulsejet forum
- Topic: Tenney's rotary Dynajet
- Replies: 15
- Views: 13182
Re: Tenney's rotary Dynajet
Hi Mike love that one, must be a bit of pressure gain with it going around and around like that ;-) self starting too I shouldn't wonder. the other wonder is we have not seen it before! all those terabytes are a pain to sift through at times but I do love the way he mounted the valve head Viv I can...
- Mon Dec 15, 2008 1:07 am
- Forum: Jet Vehicles, All Types
- Topic: Pulsejet-powered sailplane
- Replies: 10
- Views: 15054
Re: Pulsejet-powered sailplane
At an assumed glide ratio of 50:1 and a gross weight in the 800-850 lb range (typical for a modern 18-meter sailplane), the thrust required would be on the order of 16-17 lbf--hardly spectacular, and more of a testament to the airframe's performance than the engine. BTW just so yous guys can get a ...
- Sun Dec 14, 2008 11:25 pm
- Forum: Jet Vehicles, All Types
- Topic: Pulsejet-powered sailplane
- Replies: 10
- Views: 15054
Re: Pulsejet-powered sailplane
http://www.lange-flugzeugbau.com/htm/english/products/antares_18p/antares_18p.html Some dubious claims here. The engine is said to represent " the leading edge of a family of jet engines, which can be traced back through more than 60 years of German aviation technology ". Haw-haw-haw... Interesting...
- Thu Dec 11, 2008 3:02 am
- Forum: Gas turbine forum
- Topic: turbine blade source
- Replies: 22
- Views: 18277
Re: turbine blade source
would it be possiable to make good turbine blades by cutting a pipe of sufficient metal in thirds long ways, and depending on the angle of blade you need, get a pipe of larger or smaller radius? To cut it in thirds is just an example number, it would depend on how large a blade you are looking for....
- Fri Oct 31, 2008 5:33 pm
- Forum: Off topic forum
- Topic: Death of jetZILLA Predicted
- Replies: 25
- Views: 23273
Re: Death of jetZILLA Predicted
You just knew it would happen ... Larry: Are you being unfairly singled out? There's all kinds of similar mods on the original name. Among these are: BRIDEZILLA HOGZILLA AMPZILLA --to name just a few; some are commercially applied and some not. I would contend that the original usage has become so ...
- Mon Oct 20, 2008 10:00 pm
- Forum: Valveless pulsejet forum
- Topic: Messerschmitt design?
- Replies: 11
- Views: 12364
Re: Messerschmitt design?
I might suggest that this is a fairly "ambitious" first weld, particularly WRT the variable geometry nozzle part, but also the perforated flameholder liner and - well - pretty much all of it. Based on my years of TIG welding (and I'm still learning the skill) I'd recommend that you do a lot of prac...
- Mon Oct 20, 2008 8:15 pm
- Forum: Valveless pulsejet forum
- Topic: Mike's Build Log
- Replies: 441
- Views: 331486
Re: Mike's Build Log
Not a bad percentage of max, I'm thinking. Yours has a better potential for lower SFC than my 1.55L scale up of the pocket jet, which got 6.5 lb. (Larger CC, straight pipe tail) This is a development project, based on my successful M41E project (which you saw running at one of our "mini-meets"). Th...