Caged Pulse Jets

Back from the Playa!

2011-10-04T21:16:00.003-06:00

Ahhh, finally cleaned off the Playa dust from EVERYTHING! So Burning Man- we went, we survived, we returned. The new interface with the audience was disappointing, as it did not really work. I figure that the electronics involved with the new little (expensive) proportional valves did not hold up to the playa dust at all. Also, we managed to fry almost all commutators while out there, so it was truly a frustrating week of trouble shooting and fixing stuff. The highlight for me was welding in a complete white out! When do you get to do that? And having my kiddo, Kodiak around, that was pretty great as well. Then there was the pickle juice at the Front Porch, and operating the fire sails on the Clockship Terre...I digress. CPJ Rev 2 worked for a few days, while I was croutched down, running the jets old school stylie- with the tried and true ball valves. It was dangerous being at such close proximity to them, and fun at that. At least I had the DPW as my faithful audience, kuddos to them for coming out again and again... So for now I need to take a break, reconfigure the control system and polish everything back up. It will work as a true interactive instrument at some point!

Mesa Art Mash 2011

2011-08-04T22:09:00.003-06:00

It's true! We are hosting another super fun event out here on the Mesa! This time we will be featuring THREE sculptures- all interactive, all kinetic! Caged Pulse Jets, with it's newly revisioned console will be up and running for all to play, "Fledgeling" Christian Ristow's newest pedal powered Stainless bird skeleton and the Heron with some more amazing performances by members of Wise Fool! There will be music, to the tune of DJ Paul Feathericci, food, beverages, and endless play time on these sculptures! We will also have the bad ass art car running for RIDES on the Scoutch! When you wonder? Sunday, August 14th, 2011. 5-9Pm Come one come all! A $10 donation will get you in and square- though you may donate with paypal as well! Help us get these projects on the road! see you there!!!

2011-07-24T12:07:00.000-06:00

snail mail order...

2011-07-24T11:40:00.003-06:00

Waiting for the EPC valves.... Again we are waiting for the valves that will help fine tune the controls of the jets, the electronic proportional valves. I ordered them through a NM distributor, who ordered regular shut off valves from some company in Florida, which I returned, so we started from square one two weeks later. I am expecting the valves this week. Meanwhile we have been forging components for the cage, and I have been repairing the electrical nest in the console. There are plenty of repairs. One sheared bolt resulted in a failed extraction and a complete dis-assembly of Jet 4's commutator. Hours. Most of the high voltage wire for each jet needs a splice repair due to hard traveling. We have hopefully remedied this problem by building a cozy wood base holder for each pulse jet. Each of the jets counterweight "sails" has also been furnished with bright colors and numbers which will make it easy to see which one you are playing. The shop has been bustling with volunteers for both projects and the excitement is growing. Christian's project takes up his entire part of the shop and my section of the cage is crammed into my space. It's a full shop! Now if only those darn valves could get here, so we can test and assemble the console!

Fixin' the Cage!

2011-06-25T09:08:00.003-06:00

All right, between working in the shop for money, working on the Pulse Jet Cage and working on little Kodiak, this blog just falls by the wayside. We had a great crew come out and help yesterday- we set the cage up and evaluated what needed fixin'...luckily not all that much as it's in pretty good shape. Some new bracing on the jet stands will help stabilize the cage, and added rib supports for safety was also discussed. The jets are running fine, we even got the smallest one to rev up, by plugging one of the intakes. Eric Beck provided an augmenter for that jet which we will install this time around. For a small little jet, the thrust is pretty good. The console will be made much more user friendly- as in serviceable. I'm adding a hinged top, so it can be fixed on site. The first of the EPC valves will be here next week. The challenge will be to nail the communication between the EPC valve and the potentiometer in the console. Not always a plug and play situation, so we will trouble shoot that if necessary. All in all a great turn out in people power, and I am excited to re-vamp the project!!!

Caged Pulse Jets Rev 2

2011-03-29T21:31:00.002-06:00

It's official! CPJ is getting a revision thanks to a small Grant! After going to Burning Man, I listened to the feedback from the crew and from friends who had played the sculpture and it will be getting better...much better! The main problem was with the lag time of the control knobs fueling the jets and the effect it had on the jets. Sometimes it took almost a minute for the input to affect the output. This made it difficult for people who did not fully understand the workings of the jet engines to manipulate the sounds. There will be added electric valves to illicit an instantaneous response from the control station. In addition I'll be embellishing on the actual cage structure with some more ironwork and spruce up the control station with more knobs and switches and fun gadgets! I will keep posting once the revision gets on the way!
And yes, it will be back at Black Rock City this year, with me, and my sweet little boy (and the other big boy too- who got a BM Grant to build "Face Forward"; a large stainless steel face in which each of the major muscles responsible for the formation of facial expressions is capable of being individually cable operated by a member of the audience.

So we go as a carnie family...

2010-10-16T14:20:00.002-06:00

Another fabulous picture- this one thanks to Mathew Wanlin.

2010-09-26T13:57:00.002-06:00

BM 2010

2010-09-14T15:49:00.002-06:00

More to come soon, and video!!

2010-09-03T21:44:00.003-06:00

Well, it's a mixed bag- I thought I was going to be relieved when the project left for the Playa, but found myself feeling a constellation of emotions instead. Mostly sad, as I really wanted to see the Jets up and running and to witness the reaction of the public. It's like rehearsing for a performance for months and months and then your understudy takes the role on opening night. Dave X, BM's fire safety Man, has been in touch with me (yes there is internet for some out there!) and let me know that the crew is doing a great job! He also was kind enough to send along these pictures for now. I am so proud of them, and I hope they are having a blast. In the meantime I will just keep dreaming about what it may be like out there, white-outs and all.

2010-08-28T10:55:00.001-06:00

2010-08-23T14:05:00.002-06:00

And off they go!!!

2010-08-22T22:24:00.007-06:00

Well, after a grueling couple of weeks of testing, trouble shooting, some failure, re-testing, more fabrication, more safety precautions, we are finally done. As done as it will be for Burning Man! Like most projects, "done" is a misnomer, as I could spend another year perfecting this sculpture... but for now- it works, and it works well! A few things we learned during the first test- we needed to truss the arms that hold the jets to stabilize the cage, and the jets after they really start spinning(so fast!!) I called on an old friend who brought his portable welding rig out to the site and helped truss the arms in question over some beers and a sweet afternoon.
The consequent test was successful except for the hose clamps failing on the big jet, propelling it into the cage. This seeming disaster had an unexpected upside though, as I replaced every hose clamp with the heaviest duty aero/space clamp money can buy and welding on a safety bracket to hold every jet to it's respective arm securely. It happened to the largest jet, and it flew into the cage, which held up minus a dimple. The jet was repairable and will still work fine. Glad it happened during testing!
The console interface is still finicky, but works great if you have the touch. There is a delay in response of the jets, which will require some concentration on the players part. It truly is a very interactive sound sculpture- not for the weak at heart!!
So tomorrow it gets loaded, hopefully without too many hitches. It's a bit bulky for a trailer load, but, hey, what weird sculptures are not? Tuesday early it's due to depart for its long journey to the Playa. I have been excited for this day for a while, though I will admit I wish I could now go, even if it was just for a little bit- to see it up and running, on the beautiful Black Rock Desert.
Then again, I get a firm kick from the little one inside, reminding me I have other things to tend to...like giving birth in a few weeks. oh yeah.
The project will be well documented, by my good friend Wendy Shuey, and I am excited to see pictures & video and will post them post event!
To all of you who helped make it happen- Thank you!!! I am so grateful for having this opportunity especially pre baby. May the project fair well, may the team be safe, and wishing you all the best Burn ever!

First Test!

2010-08-12T21:00:00.003-06:00

Well, we busted a move and finally got all the components together to have our first test of the jets inside the cage.
Four out of five worked well- the smallest one is a bit cranky but we will get it going for the second test tomorrow. Thank you to all volunteers that came out and helped last night!
The jet in the movie started vibrating too much and slammed into the supports holding it to the cage- luckily it did little damage to the jet. We will be cutting the jet arms a bit shorter and fine tuning the counterweights tomorrow to help with this problem. They sure spin fast, and together it's going to be a crazy ruckus in there.
enjoy the movie- more after test #2...

Commutators & Wiring & Forging!

2010-07-29T11:16:00.005-06:00

We are in the final assembly stages with the components that are the most complicated. The commutators do deserve a standing ovation, as they are super fabulously built and designed by Christian Ristow- they are single port gas and single conductor electric and spin beautifully on two bearings. We are building the arms that hold the jets out into the cage and it's getting crowded within the cage. Meanwhile, Steve Storz has been applying his mad scientist wiring to the project and the console is almost all wired and ready to interface with the jets as well as the public. The console looks very inviting and gadgety! On the team recently is blacksmith Jim Stoner, who has been cranking out some amazing forged work, for embellishing the cage, which will get added in the next few days. I have a fantastic crew going here and am confident that we can start testing very very soon!

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Working Days, Working Nights

2010-07-23T18:19:00.008-06:00

Time does fly! I had some crazy ambition that the project would be DONE by now, but hey, we are close, but not quite there yet. We have had a good turnout of help and we are in the last stretch to get the cage done and the jets mounted. Most of the components had to be ordered so there has been plenty of time spent tracking missing or late packages. We have set a deadline to test the sculpture, and everyone on the crew is working hard to meet that. The fabulously made commutators are done, thanks to Christian, and are ready to get mounted on the jet arms. Steve is working hard to get the console wired for interfacing with the jets and the public- not an easy task! I finally found 300' of affordable propane hose with appropriate JIC fittings, which should arrive next week, and then we are ready to test!
Personally I am falling in and out of good use as my 30 LBS front pack is wearing me down in the shop- baby is heavy!
And on another note, there is now a kickstarter support page for the project to help us get over the budget crunch- Hopefully our goal of $1000 will get us there! Any donation is very appreciated, small as well as big!

AWESOME Work Day

2010-06-27T18:36:00.003-06:00

Suddenly there are five volunteers in the shop on a Saturday busting ass on the cage! The cage is almost done, the pulse jets have arrived (thank you Eric!) and we are about to put everything together. The control station is mostly built, and now needs the plumbing and the various cool switches and dials, to be doctored by Steve Storz- our team electric artist. Once the skeleton of the cage is finished, all the plumbing goes in, as the propane will feed through the middle rib of each quadrant for four of the jets and the fifth will lay on the floor. Christian is machining the commutators, which will enable the jets to spin freely. The cage is big, but light, and the only hic-up so far is how to fit it on a trailer... Hopefully a 22 ft. trailer will do the job- but first I have to find one...

It's Up for the first time!

2010-05-28T17:53:00.003-06:00

Scraping together a crew is not always the easiest thing out here in Taos, but I have to say today's crew was awesome and we got plenty done! After gusseting some of the angled corners we schlepped the four pieces outside and bolted them together. Now normally at the bolting stage there should be some tweaking, but, for some stroke of great luck (or just decent measuring) it came together perfectly. We bolted the top ring together, then made angle brackets for the bottom to hold the structure together. All this before the weather decided to go to hell and we called it a day. It's a great looking cage! Next up we will be welding bracing on to the ribs and infilling with rod to add structure and strength.

Moving Right Along

2010-05-18T12:47:00.006-06:00

After days of jigging(!) we finally have a system down and we managed to build two out of the four quadrants. What's more exciting is that we also put them up in the shop- squeezing in between roll up door mechanisms and overhead hoists- this cage is BIG!

The Build Commences...

2010-05-07T10:54:00.004-06:00

Finally! I always pay attention to the very first cut in the shop that signifies the actual fabrication starting point of a project, and this cut happened on April 29th 2010. Living out in beautiful Taos New Mexico has a variety of challenges, including the extreme difficulty of getting specific materials delivered here. Steel comes once a week from Albuquerque, if you forgot or missed something, or worse they forgot or missed something, you are running at idle for another week. The round trip drive to Albuquerque is six hours, making the idea of running down there and getting it yourself a small road trip(without the perks) and with gas prices as high they are and a large truck to haul the stuff back on to boot, a non option.
So after weeks of waiting for checks to clear, for materials to be delivered, for a few volunteers, the project is slowly creeping along. This would not be such a big deal if the reality of my situation was not as it is- which is that I am also currently fabricating a baby(!) which takes a bit of energy and ultimately is much more exciting than any steel sculpture I am building in the shop! Due to that, I am currently in the so called honeymoon phase of pregnancy, the middle phase, aka the second trimester. Energy is good, health is great, mobility is compromised but OK. Looking for a pair of shop pants that actually fit is not easy- welding maternity, anyone? Come July I will be in my third trimester, and I am guessing based on how much room this new addition is taking in my body all ready, that I will not be too excited to be working in the shop at that point.
So, now that I have set the scene- I will start the documentation of the build, epic on some levels, straight forward on others. First- building the Cage. It's a fairly large structure- a 16 sided 17 FT tall and 18FT across elliptical Cage. I guess the angles from the Heron Project did not satisfy my masochistic desire to build something so geometrically elaborate, so I am now working with ROUND stock and complex angles! It will break down into quadrants, and hopefully squeeze onto trailer for transport. My dedicated shop hand and 2nd Project Lead, Gregory, is in full swing helping me roll the ellipses out to form the main structure. And Yes, the roller we are using is from the 1940's. Johnny helped out with rolling and drilling the collars that are going to hold the cage together. Then there is the infill, between each rib with forged filigree and expanded metal. Some ribs will contain propane fittings, as the gas will run within the rib. The five arms that hold the jets will be rolled and built, with two-port commutators, and bolted on.
In the meantime, Eric Beck, pulse Jet maestro is fabricating five pulse jets of varying sizes, and will be coming out here in June for the mounting and final acoustic testing of the jets inside the cage. After the cage is done there is the interfacing station- the control station that has to be built and wired to work with the jets. Not a piece of cake.
But, let's take one thing at a time... so first shots of cage fabrication! Note that that is not a beer belly but a baby belly I am sporting, in case you skimmed over the first part!

The concept-

2010-01-31T23:38:00.002-07:00

The cage containing the jets stands 17' tall, including the top lifting ring, and is 18' wide at its widest. The jet cage has an octagonal footprint and is decorated ornately with forged elements to look like a giant bird cage. Inside, hidden within the structure, run propane, air and electric- the three ingredients for the valveless pulse jet engines to work. Five arms run out from the cage structure and hold the pulse jets and their fuel. Each jet has its own axis that it will spin freely around powered by its engine thrust. This will also add a stereo sound component to each jet.
I am hoping to get frequencies ranging from 60 Hertz to 600 Hertz, and that will depend on the actual size of the jet. There is a user interface control panel outside of the cage that enables the public to "play" the jets as they will have the ability to modify the amount of fuel, and air. I would like it to be a control panel that can be played by one or several people-a moon shaped panel with sets of three buttons/knobs/switches for each jet. The control panel is attached and tethered to the cage. The incredible sounds that these jets can make will create a thunderous symphony like no other. While running, the jets will radiate their bright orange and yellow glow, resembling dynamic and awe-inspiring birds flying around in their bird cage.

Sketches and Pictures

2010-01-31T23:15:00.007-07:00

Here are some pictures-

The first one is of my first Pulse Jet- I built a Lockwood-Hiller style jet for a show called Propulsion in Taos, NM in 2008. It ran when it felt like it, but it sounded great! I was inspired by the huge pulse jets at a SRL show at Robodock, which I had the great pleasure of operating during the show.