Chuks
Senior Member
Joined: August 2015
Posts: 498 
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Post by Chuks on Feb 13, 2016 16:44:05 GMT -5
do you force fit the journal bearing in your aluminum shaft tunnel?
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Post by Johansson on Feb 13, 2016 17:18:18 GMT -5
do you force fit the journal bearing in your aluminum shaft tunnel? No it spins freely with a set clearance. As I said before, read up on the subject because you will never learn enough by just asking specific questions. |
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Post by Johansson on Feb 23, 2016 13:23:46 GMT -5
Only two days until Speed Weekend and the jet kick is ready to go, so I spent last night in the workshop on the JU-02 engine. I made the shaft tunnel casting deliberately long until I knew the exact measurements of the engine, after assembling the axial bearing and fitting the turbine shaft I could measure how much I needed to remove. On the pic I have also started to make an alignment ring so I won´t have to use dowels.  With that done I made a stainless seat for the turbine shaft piston ring seal, I will weld it to the rear NGV wall later.  Arboring the hole for the ring seat.  Here the seat is pushed in place, I have some work left to do on the NGV wall before I can weld it.  The turbine shaft fitted in the seat to test the fit.  I reached some kind of mile stone 23:30 last night when I could assemble the diffusor plate and shaft tunnel with the rotor in place!  Cheers! /Anders |
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Post by racket on Feb 23, 2016 15:41:41 GMT -5
Hi Anders
Always nice to see an assembly spinning in its bearings :-)
Now you can get ready for the weekend and some fun .
Cheers
John
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Post by Johansson on Feb 23, 2016 16:55:22 GMT -5
Actually I didn´t bolt the rotor together completely, without the NGV fitted it will be difficult to remove the comp wheel if it is forced the last centimeter up against the spacer. After the TV94 compressor had been fitted and removed from the shaft a couple of times it started to come off easy but the first times I had to use disturbingly much force in the hydraulic press to make it release the snug inner section of the shaft. We´ll have some fun for sure, and hopefully go fast as well. Keep your fingers crossed guys!  Cheers! /Anders |
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Post by smithy1 on Feb 23, 2016 18:28:08 GMT -5
Are you taking your bike on the weekend Anders..?? Or just the kick..?
Smithy.
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Post by Johansson on Feb 24, 2016 0:01:28 GMT -5
Are you taking your bike on the weekend Anders..?? Or just the kick..? Smithy. Just the jet kick, I´ve decided not to take any chances with the bike since the bouncy ice track upsets the steering and makes the rear wheel jump up and down. If the freepower revs are high there is a risk of serious freepower overspeed and engine damage if the rear wheel suddenly jumps up in the air. I even sold the spiked tyres so I couldn´t change my mind in the last minnute. Cheers! /Anders |
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Post by smithy1 on Feb 24, 2016 1:38:37 GMT -5
Just the jet kick, I´ve decided not to take any chances with the bike since the bouncy ice track upsets the steering and makes the rear wheel jump up and down. If the freepower revs are high there is a risk of serious freepower overspeed and engine damage if the rear wheel suddenly jumps up in the air. I even sold the spiked tyres so I couldn´t change my mind in the last minnute. Cheers! /Anders Good call....we can't have a bouncing Anders sliding up the ice....it's not a good look..! Smithy. |
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Post by Johansson on Feb 24, 2016 2:55:55 GMT -5
Nahh, way too much work to risk it for a sluggish 200+km/h run on the ice. Those damn spiked tyres are so draggy that I can´t run any faster with the limited power I have.
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Post by smithy1 on Feb 24, 2016 18:20:02 GMT -5
Nahh, way too much work to risk it for a sluggish 200+km/h run on the ice. Those damn spiked tyres are so draggy that I can´t run any faster with the limited power I have. I'll send you over a RR-M250 B17 engine....~420SHP....similar to the engine in the MTT Y2K turbine bike.....that should fix your power problem..! Smithy. |
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Post by Johansson on Feb 24, 2016 23:17:54 GMT -5
I'll send you over a RR-M250 B17 engine....~420SHP....similar to the engine in the MTT Y2K turbine bike.....that should fix your power problem..! Smithy. I think the JU-02 will do the trick, close to 300hp will be plenty enough for a shot at the 349km/h class record. I still won´t take it to the ice again because of the bouncing rear end and wobbly front end. |
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Post by smithy1 on Feb 25, 2016 17:44:53 GMT -5
Yeah....300 ponies should come close....the Moto GP bikes can do ~340kmh with a bit less hp....but they weigh nothing and have jockeys riding them..!
Smithy.
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Post by Johansson on Feb 28, 2016 7:18:24 GMT -5
Yeah....300 ponies should come close....the Moto GP bikes can do ~340kmh with a bit less hp....but they weigh nothing and have jockeys riding them..! Smithy. Actually weight can be a good thing in land racing, as long as you can decide where to have it. I plan to keep the JU-01 in the bike until I have sorted out the fairings, much easier to do with limited power since a 300hp engine will make the bike a wild thing to ride. There is probably plenty of speed to be gained by improving the fairings so the idea is to try to reach 200mph on the standing mile with the JU-01 and then fit the by then finished JU-02 for some serious speed! :-) Cheers! /Anders |
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Post by Johansson on Mar 17, 2016 5:27:47 GMT -5
I got the 12V glow plugs in the mail a couple of days ago, they are very quick in heating up and should ignite both propane and kero nicely. My plan is to fill the water injection system on the bike with kerosene and make it a standalone kero preheater to get rid of the spark ignition and propane injectors I use on the JU-01, there will be too much problems if I want to tap the preheat fuel off the main fuel system.
Cheers!
/Anders
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Post by Johansson on Mar 17, 2016 16:32:50 GMT -5
Started making the kero starter tonight in ss2368, another evening and it should be ready to be test fired to atmosphere.  Cheers! /Anders |
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