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I would imagine the machines with the files on have been hit a bit hard just lately:-) Yes, but that doesn't seem to be the problem. In fact, if a number of people downloaded it recently, and they make the files available to share in eDonkey, then the transfers for the rest of us should go more qui...

Luc, Nice report on the 700 psi nozzle. What I think would be very important to you at this point would be to model the nozzle and the first induction stage together. There are a couple things you could do to tweak the design to see if you can find out were the system may be sensitive (a couple perc...

Luc wrote: this patent will in force for the next 15 years and anyone producing this type of engine, without Michael A. Stram authorisation, is liable for damage. I don't need to tell you that today is a very bad day for me ... This engine type was my next step... Damnnnnnnn. Luc, I would not worry....

Well, There goes 24 hours I will never get back. I got really excited about Free CFD. Then I was a little less excited about getting a special program to access it. Then I was no longer excited at all to discover that some bug in the system causes my downloads to reboot the computer every 2-10 megs ...

WHO WANT A CFD PROGRAM FOR FREE ........ He he he. Simple and easy. Just find and download the peer to peer "Edonkey" program (It's like Imesh or Cazza) then, do a search on the word "Cosmos". Luc, Holy S***!!! I swear my blood pressure doubled when I read this! My google search for eDonkey turns u...

Viv Wrote: But lets face it with Lucs CFD we can rematch the intake stake to a new high velocity nozzle and raise the performance, what do you think? I agree that the CFD offers a great opportunity to improve the design. Sure wish I had access.... Anyway, what I see as the real potential here is to ...

IIR, Viv had asked for a drawing of the existing nozzle, so I drew one up real fast for him. Also gives me a chance to try uploading to this group

Regards,
Raymond

Luc Wrote What I need, is a nozzle that will have the same performances @ 225 psi. as the Gluhareff nozzle when it is at 700 psi. A basic sketch with Acad 14 will do. If I understand correctly, you want a nozzle that will give the same plume at 225 psi that the standard nozzle gives at 700 psi? As w...

Luc Wrote Conclusion ... Now that we know that the actual nozzle is good at 700 psi. but not at 225 psi. We need to design one that will perform like the Gluey one at 700, but using 225 psi. only. As for the flow rate ... Easy, we will just have to enlarge the restrictor and "Bingo" ... We will have...

Dave wrote: Some time ago I was able to get my hands on a copy of a study done at Iowa University, Aerospace and Engineering: "Analytical and Experimental Study of the Performance Characteristics of the Gluahar-eff G8-2-130R Engine" by Rory Eisele and Jesse Hilton. The study was performed in 2001 an...

Luv, Viv, I am concerned that there has been no verification to my inquiry about whether the supply propane is liquid or gas. I did see Viv's reply about 225 psi being above the propane's vapor pressure, but that is not exactly relevant. In any propane tank that is not COMPLETELY FULL, there will ex...

Viv, Unfortunately, it doesn't really matter what the supply pressure is if you are using a sonic nozzle; the gas will be accelerated to the speed of sound, and any excess pressure energy will just result in an increased plume density (and mass flow). So a supply of 700 psi and 1200F will still only...

The Gluey nozzle is a simple sonic nozzle with a .250 in diameter throat. A sonic nozzle means that it can only accelerate the gas to the LOCAL speed of sound (i.e. based on static temp at the exit). However there is a lot more pressure energy in the propane, and if a convergent-divergant nozzle is ...

I did a quick hand calc for your input values of : Throat dia=.25 in Total Pressure= 225 psi Total Temp= 1200 F Fluid: Gaseous Propane Nozzle type: Sonic and I got: mdot(GP)=.16 lbm/sec exit velocity=1400 ft/sec Note that the actuall nozzle is not a true sonic nozzle, as it has such a long throat wh...

Hello All, I just joined this group because I just found it. I have been interested in these things for years, though I have never really trusted the SFC figures for the 130 sized engine. Like others, I have performed my own performance calcs, and usually come up with a SPC in the 3-7 range, dependi...