Mike's Build Log

[milisavljevic]

Hello Mike!

Neat! It is good to see how Tupperware continues subsidizing science projects the world over!

"Keep it coming!"

Cheers,
M.

[Mike Everman]

That was the finest in disposable fuel tankage.

[metiz]

hehe nice usage of your pattented gravity throttle controller

[Mark]

I wonder how well a tube about the width and length of a typical spark plug with fuel line and petal valve would work to draw in a rich fuel/air mixture directly into the combustion chamber? If you imagine a front valved Sibley Craft Jet with a Logan side port added, that is one arrangement that reved up fine for me. In a way my little Logan became a valved pulsejet with twin exhausts or maybe you would call it a hybrid.
But if you were to slave a reed valve with venturi tube directly to the side-center of the combustion chamber of a valveless, I feel certain it would farm the low pressure waves, just as a Dynajet head does sitting directly on the combustion chamber of the Dynajet. What I was proposing is that you aspirate a large amount of fuel with only a token of air, a hybrid of say 10% valved engine and the rest valveless activity. Obviously, if the combustion chamber were only a high pressure zone, not even fresh air could get in. With a venturi tube and needle valve with a one-way petal valve gate sitting right next to the "zone", it's going to have first dibs on drawing in air and fuel because of the proximity.
I would love to have a little narrow threaded tube, say 3 inches long with a valve that could be conveniently screwed into pulsejet bodies. And have the "reed venturi tube" equipt with a needle valve akin to the Sibley Craft Jet head, or like you attempted with the needle valve across the opening of your valveless intake.
Perhaps something like this breather valve with a tube sleeved over it would work? Again, the thought is to get fuel/air directly into the heart of a valveless pulsejet using a valved fuel/air Dynajet head aspiration philosophy, only smaller favoring fuel flow over air. Now I don't know how well this would work, but it might be fun to try. Some assembly required. ha
http://www.aerocycleco.com/s&s%20breath ... ve%201.jpg

[Mike Everman]

Agreed on all counts, Mark.
OK, so got some work in on the triple tail PocketJet 3x, 1.5L motor. I'm running out of time because I want to take it with me to show Nick and Graham next week.
The rear cone came out fairly good. It's the toughest part next to the head plenum. It's 50-50 whether I can have this done by Wed.

First the flat pattern, printed and glue sticked down to some .035" mild steel.

Then rough out the CC end shape with the help of a jig sawed form.

Then band saw out some plates with "v" cutouts and put spuds in the 1" exits...

And some pressing, spot welding, hammering, swearing, sanding, the final product:

[GRIM]

You made a beautiful job of that Mike , I thought you were going to make two halves , with welds down the outside edges,

And some pressing, spot welding, hammering, swearing, sanding, the final product:

Understatement

It's 50-50 whether I can have this done by Wed.

Dont rush it , this is looking very good

G

[milisavljevic]

.

[After] some pressing, spot welding, hammering, swearing, sanding, the final product.

Oh, my...

Glad I was sitting down when I got to the latest build photos. Beautiful work, Mike.

I will keep my fingers crossed for you to make your deadline.

Cheers!
M.

[Mike Everman]

Thanks, man!
So here's the end of what I can do today. Straight section added to the rear cone, wrapped around and spot welded as I went with a .1" overlap. Tomorrow I get the ubends and hopefully the head plates will be done, too. Then it's just cutting and flaring tubes. Can't wait to try this!

[Mike Everman]

...and a video of the presswork to make the three exits. Looked good on this side, but the center bulge buckled inward on the far side. That's where the swearing came in, but it fixed up nice.

[Fricke]

Really awesome work Mike!

I hope you will meet your deadline.

[milisavljevic]

Can't wait to try this!

Can't wait to hear you try it / read about it / see the movie!

Too much like watching someone else's mama bake cookies.

I say someone else's
mama because I crawled out
from under a rock.

Apparently.

Go for it, Mike!

Cheers,
M.

[larry cottrill]

Man, that is beautiful. I've always wanted to do one something like that, but just a single intake. It makes great sense if you have the skill to do it. I think such a "manifold" will perform beautifully.

Wonderful work, Mike!

L Cottrill

[Mike Everman]

Thanks, Larry.
OK, so big progress today! Just have to put the plug nut and fuel line on.

First, truing up the intake flares:

Here's the part set, less headplates (guess I forgot to get a shot of those).

The intake/fuel plenum assembly.

In the alignment fixture.

And, ta da, the almost finished product!

[milisavljevic]

.
Hello Mike --

To quote Dita Liebely... "Amazing! Amazing! Amazing!"
You just know this baby has to run as good as it looks.

When's your flight?

Cheers,
M.

PS: Someone's presentin' skills be gettin' mighty shiny!

[Jutte]

Great skills!