Stainless and Aluminum One Piece Weldless Augmenters

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Eric
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Stainless and Aluminum One Piece Weldless Augmenters

Post by Eric » Fri Sep 12, 2008 8:15 pm

Hey everyone,
Im now offering a wide number of sizes and styles of thrust augmenters, from 1" - 3.5" in stainless and aluminum. They are one piece, formed from tubing for a seamless smooth inner surface.

They can be custom made to your specs or made based off specs for the production engines. The intake flare radii and curve profile can be varied for either a round intake lip to more of an annular wing configuration, which seems to perform better than a simple curve.

For more aerodynamic augmenters an exterior shell can be connected from the front lip to the back of the flare, cutting down turbulence.

They can be provided by themselves so you can mount them, or mounting arm(s) can be welded on that can be attached to the engine for adjustment, or even welded in place at the best location.

Typical thrust gains are in the 40-80% range with no additional fuel consumption or moving parts. Heres a picture of two 2" augmenters in stainless.

Eric
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miniaugmenters.jpg
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Viv » Fri Sep 12, 2008 9:18 pm

Hi Eric

Those are really nice, I love the aerodynamic shield that can be added to that front lip

Viv
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Mike Everman » Fri Sep 12, 2008 9:45 pm

Hey, cool. I'll take two. hmmm, my pocket jet tubes are .93" dia internal, both exits. I had figured I'd need augmenters that were approximately 3" inlet dia. Any idea how the 2" ones would do? I got 40% extra out of the original pocket jet with simple flared inlet, straight 2" tube augmenters (no diffusion, and rather short at that). That motor had the tail at .93" and the intake at .68 ID.
Mike
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Jim Berquist » Fri Sep 12, 2008 11:20 pm

Nice looking, Eric!

When money is better I'll be looking for one. Going on the little Thermo You made. Jim
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Mike Everman » Sat Sep 13, 2008 12:13 am

Eric,
The new site looks great! Thanks for the link, too! I do want to buy some augmenters, so let's talk. I have some mad money (sold some aluminum chips, ha) and not much time!
Mike
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Eric » Sat Sep 13, 2008 12:50 am

Thanks guys :)

Mike any idea on the exhaust velocity on the little pocket jet? The higher the velocity the longer they should be, expanded tails get diminishing returns after a fairly short augmenter length because the velocity is lower.

A 2" core diameter augmenter, with intake flare diameter of 2.5" and a 2.4" dia diffuser section would probably be just about right for a .93" exhaust. Probably wouldnt want it to be much more than 2.25" core ID.

Though I guess if its just for static you could go up to 3"...

Eric
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Mike Everman » Sat Sep 13, 2008 2:27 pm

Static is the idea. It's the motor that I'm getting 3.5 lb out of now. I'd guess about 100+ m/sec.
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Eric » Sun Sep 14, 2008 5:30 pm

2.0-2.2" ID should be optimal then. Maybe around 7" long.

Whats the distance between the intake and exhaust centerline? Basically the flare size will be limited by how much room there is between.

Eric
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Mike Everman » Sun Sep 14, 2008 6:40 pm

Intake and exhaust centerline distance is 3". Here's how far I got. I think I put in a constraint that the inlet flare would be the same OD as the exit, so a straight outer shroud would go on later if necessary. These shown are 57mm inlets, and 4deg half angle on the flares. I'll take whatever you recommend, however.
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augmentor for pockey.jpg
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Ghrey » Mon Sep 15, 2008 5:11 am

Mike what soft wear did you use to produce that image?

Nice!
In the process of moving, from the glorified phone booth we had to the house we have.

No real time to work on jets, more space, no time.

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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Eric » Mon Sep 15, 2008 7:02 am

That looks like solid works, Mikes been known to dabble in that evil program.

Here's a 2" low profile augmenter with adjustable mount for one of the 4lb thermojets. Should put out +40% static, becoming a bit more efficient at speed.

Eric
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augmentermounted.jpg
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Mike Everman » Mon Sep 15, 2008 1:22 pm

Yep, Solidworks.
Erik, did you make a spinning rig? Can you email me a price for two, please?
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by Eric » Wed Sep 17, 2008 12:43 am

Heres a pic of the finished thermojet running with the augmenter. Self starts even with the augmenter in place.
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thermojetaugmented.jpg
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by metiz » Wed Sep 17, 2008 12:06 pm

nice photo! Any hard numbers on thrust increase?
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Re: Stainless and Aluminum One Piece Weldless Augmenters

Post by larry cottrill » Wed Sep 17, 2008 2:31 pm

Yes, that's a beautiful shot, Eric -- that should help you sell some! Of course, it's the numbers that really count.

L Cottrill

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