Franco Marcenaro's PULSE JET THEORY

[WebPilot]

Hey,

One of the most important papers that I discovered during the heyday of the old FORUM is Franco Marcenaro's PULSE JET THEORY.

I did a search on the new FORUM and found only one reference to it, and that was done by Mark - kudos Mark!

I found the Marcenaro papers on Paco de Mareno's site (now defunct) - where are you, Paco? I saw them again on an Australian pulse jet site - these guys build their own model airplanes, power them with DynaJets and fly them on cords!

The original .tifs would not show well in my browser window due to the compression algorithm he used. I transformed them into .gifs, and zipped them. I have posted them again for download.

http://www.geocities.com/forrestde/fran ... _1_psp.zip

They comprise the simplest (and yet accurate) explanation for the theory of operation of a pulsejet. They introduce the reader into the exciting world of Gas Dynamics.

They were useful then, and will be to those of you who have never seen them.

Later,

-fde

[Bruno Ogorelec]

Forrest, thank you. I have also found the document to be one of the most lucid ever. An excellent primer.

[WebPilot]

Ok,

I know where I obtained the document, but does anybody out there know (for sure) in what publication it was first appeared? (title, month, year)

When I mean "for sure", I mean almost like the issue in hand.

The only thing I found on the internet was my post from over a year ago

http://www.pulse-jets.com/oldforum/se.p ... m=pulsejet

and this site:

http://www.microair.info/F2C60WEB/67ECam.htm

concerning the 1967 Euro Championships (Aeromodeller)

V. Pecquet (France) used Pink Lady design lines on his model with a Franco Marcenaro MARS .15 engine complete with rear exhaust and tuned length pipe. They failed to start the engine.

This could be the same guy. Pulse jet tubes and tuned exhaust systems have a lot in common. Could the paper be this old?

At the beginning of his paper he states

During my 36 years long love affair with the most fascinating and frustrating engine ever designed ...

If he was 15 years old when he started playing with them, that would make him 51 yoa at the time of this writing.

I need more information.


Later,

-fde[/quote]

[Bruno Ogorelec]

In the same line of thought, is anyone familiar with this book:

"Jet Propulsion"
Advanced theory and operation of simple pulsejet engines
from the Jet Propulsion Laboratory (JPL), at the Daniel Guggenheim Aeronautical Laboratory, California Institute of Technology (GALCIT), in Pasadena

I can't remember seeing it. If it's any good I wouldn't mind spending some money to get it.

[Bruno Ogorelec]

Still more theory. Has anyone seen this one:

Nonsteady, One-Dimensional, Internal, Compressible Flows: Theory and Applications (Oxford Engineering Science Series)

by John A.C. Kentfield
Release Date: 01 August, 1992

ISBN Number: 0195073584

I have found a glowing reference to this book, which apparently deals with pulsating flows, among other things (not unexpectedly, given the author).

[Bruno Ogorelec]

I have a copy of it. I haven't read it yet.

I just discovered I have it, too. Obviously, my filing system is far from perfect.

[WebPilot]

Dear FORUM attendees,

I have taken the liberty to split the original pages and ?sew? them into one .pdf file. Amazingly, it is only 746 KBytes in file size.

I have broken the first link and am now providing another. Right mouse click and save the following file to the folder of your choice.

http://www.geocities.com/forrestde/franco_marcenaro.pdf

No, I didn't run out and buy something. I have some free software that allows me to do it. It is just a little cumbersome to use it at times.

Enjoy!

-fde

[mk]

Thank you Forrest!

Why didn't the first link work?

[WebPilot]

Thank you Forrest!

You're welcome.

I have broken the first link and am now providing another.

Why didn't the first link work?

I terminated it.

Later,

-fde

[jetbill40]

Yes fly by wire.Imagine a pulse jet on a70 foot .033 wire going 200+ MPH I have set the jet speed recod here in the states 4 times.its wild and fun. JET BILL

[larry cottrill]

Yes fly by wire.Imagine a pulse jet on a70 foot .033 wire going 200+ MPH I have set the jet speed record here in the states 4 times.its wild and fun. JET BILL

Jet Bill -

Well, at least two of us ... Steve Bukowsky and myself ... still think that U-control flying is a blast! I've actually FLOWN my Dynajet [though it's sort of becoming a dim memory in my advancing years]. Or did you actually use Monoline control?

Why don't you [maybe on the Off Topic forum] wax eloquent for a little while on the practical realities of working with the Dynajet powerplant, and for a little while on the good, the bad and the ugly of trying to break world speed records with it. Steve and I, at least, would enjoy the heck out of hearing someone talk authoritatively on those subjects! [And I'll bet a lot of the denizens here would find themselves getting sucked into the discussion before it was over.]

My only successful Dynajet model was a semi-scale trainer with a lathe-turned and hollowed fuselage, a very large wingspan [48 inches of solid hard balsa - carved to a nice lifting foil, though!], a Campbell's Soup can fuel tank, tricycle gear and a net weight of a hair over SIX pounds. It did 90 MPH on approx. 80ft of braided bronze control line. Needless to say, this took up a LOT of the circle just getting airborne. We calculated the line pull at better than 25 lb, which is something when you consider that I weighed about 115 at the time! Interestingly, that model had a wonderful glide and rollout for landing.

L Cottrill

[jetbill40]

Larry I think I might take you up on that offer. JET BILL

[jetbill40]

Hey Larry how ya doing these days? I have found my way back. JET BILL

[larry cottrill]

Bill -

Well, I'm doing OK, but not doing much this winter. Since you've been away this long, you probably didn't catch my pics of my U-control jet ships:
http://www.pulse-jets.com/phpbb2/viewtopic.php?t=2242

Welcome back! Flying anything new? Winning any trophies?

L Cottrill

[WebPilot]

I know where I obtained the document, but does anybody out there know (for sure) in what publication it was first appeared? (title, month, year)

When I mean "for sure", I mean almost like the issue in hand.

I am hijacking back my own thread. As I asked originally, does
anyone out there know where Franco Marcenaro's "Pulse Jet Theory" was
originally published?

-fde