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Post by Johansson on May 13, 2015 4:04:10 GMT -5
A bit hot yes but I wasn´t in the direkt line of fire so to speak so I´m just fine. I´ll check the brand of the oil pump as soon as I can, you can probably find detailed info about it somewhere in this thread as well Patty. The scavenge pumps are simple brass geared pumps used to pump diesel. There are loads of them on Ebay. I ran the bike one more time after the camera was shut off, it behaved very normal then so I just need to insulate the fuel pump better. There was no damage done to the engine since it happened during starting, on top of that the turbine wheel had a cold stream of 200bar air directed at the tips so it was probably hotter in the exhaust pipe than around the turbines. It is interesting though to think about that the engine actually handles these kind of fuel flows at full throttle, that small combustor containing all that heat. Fashinating. Cheers! /Anders
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Post by Johansson on May 30, 2015 14:02:02 GMT -5
Not much action here in the thread but I have got a fair bit of work done anyway, last weekend I ran the largest half marathon in Europe in Gothemburg and finished 502 of around 50.000 runners at 1:24:50. After that I caught a cold that has lasted until now but that couldn´t stop me from updating the casting equipment with a vacuum chamber for lost wax casting and some other stuff. Here I have 3D printed a pair of test pieces in wax filament that I will try to cast tomorrow. Another thing I will try is to degass the melted aluminum with nitrogen injection down into the bottom of the crucible. I fitted the front fender to the turbine bike and wiped most of the oil and dirt from the fairings, hopefully it won´t look to crappy next to the extremely polished harleys at the event... I have also developed a hot dog holder for my kids, the damn hotdogs always tip over when they put them down on the plate so I made an experimental holder in the 3D printer. The test subject gave it one ketchup smeared thumb up! I have also made the Triumph road worthy by putting a couple of layers of 2K clear coat on the rear fender, now I can finally try to get it registered with the stiff rear end so I won´t have to look out for the police every time I ride it to town... Cheers! /Anders
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Post by racket on May 30, 2015 18:44:58 GMT -5
Hi Anders
LOL, one happy daughter , thats the most important job you did all week :-)
The printers does a nice job of the wax patterns , such smooth clean curves, ideal for a NGV .
Heh heh , Triumphs have always gotta mark their territory with oil spots.
All the best at the show
Cheers John
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Post by Johansson on May 31, 2015 0:12:20 GMT -5
Hi John, The printer works fine as long as the parameters are tuned correctly, things like overhang and surface smoothness are in high degree depending on getting everything just right for the specific filament type. There are probably 50-60 different parameters that needs to be tuned in so it is a work in progress. Getting a Triumph leak free is like pulling a star from the sky... Cheers! /Anders
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Post by smithy1 on Jun 3, 2015 4:22:47 GMT -5
Love the Triumph Anders.....I see it comes standard with the oil leak..!
Cheers, Smithy.
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Post by Johansson on Jun 3, 2015 5:07:35 GMT -5
Thanks! Good thing the Triumphs have dry sumps. I made a pen holder from one of the castings, lots of pores in it so the idea of casting the 3D printed wax without burning it out first was not very successful. Cheers! /Anders
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Post by pitciblackscotland on Jun 3, 2015 5:24:09 GMT -5
Hi Anders, Mmmmm BUMMER better luck next time Cheers, Mark.
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Post by Johansson on Jun 3, 2015 6:59:38 GMT -5
Hi Mark, I´ll try to do it properly next time with professional plaster and a complete burn out of the wax pattern before casting the aluminum. I am building another set of sand casting flasks and have ordered 25kg of oil bound sand so soon I will have a foundry capable of almost anything in aluminum as long as the caster knows what he is doing. Cheers! /Anders
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rexhunt
Member
Joined: August 2012
Posts: 32
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Post by rexhunt on Jun 3, 2015 19:18:14 GMT -5
Hi Anders, Check out this site: svseeker.com/shop_foundry.htm You seem to have a good grasp of what's needed but some of what this guy has done may give a slightly different angle. Cheers, Rex
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Post by Johansson on Jun 8, 2015 14:09:44 GMT -5
Thanks for the link Rexhunt! Olov and I visited the largest custom bike event in Sweden last weekend, 10.000 visitors and decent weather so it was fun. Our friends with the pulsjet sled was there as well, the pulsejet was heard over 20km´s outside town and one of the glass windows fell out in the tall white building on the other side of the water... I ran the bike twice but had problems starting it since the propane bottle was as good as empty, it idled a bit low in the video so when I braked the rear wheel the revs dropped below idling and I had to shut the engine down. I have realized that I need to make a bleed valve for the interstage duct to get the idling temps down to reasonable levels, no fun at all with the temps around 750°C when staging in for a run. I´ll look into it once the race in September is over, and I´ll try to get the electric starter and tachometer working as well. Cheers! /Anders
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Post by pitciblackscotland on Jun 8, 2015 23:20:22 GMT -5
Hi Anders, good one I like how the big pulsejet puts ripples across the lake right over the other side Hehehe that thing would be sooooooo awesome over at the drag strip here in OZ Cheers, Mark.
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Post by Johansson on Jun 9, 2015 15:38:32 GMT -5
It is difficult to believe when you hear it for the first time, but you kind of get used to it. The pulsejet team has put a video together from the weekend, enjoy! Cheers! /Anders
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Jun 9, 2015 21:58:48 GMT -5
LOL Love the way how at 2 minutes 40 you have a group of big tough guys looking on and as soon as you have the first after burner pop they are all ducking for cover....
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Post by racket on Jun 10, 2015 0:19:58 GMT -5
Hi Anders
Nice :-)
Cheers John
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Post by madpatty on Jun 11, 2015 20:47:05 GMT -5
Hi Johansson, I read somewhere in this thread that for the oil delivery you are using a Flojet pump, but i cant get the model information. Is that a special pump which can be used with hot oil(i guess those pumps are normally for water pumping) Cheers, Patty
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