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Post by Johansson on Jun 27, 2016 16:55:52 GMT -5
I picked up my fairings at a friends house last night after a paint job, now they are a nice satin black. Exact same color as the frame in fact, it looks a bit graphite in the pics but that is just the light messing with the picture. I haven´t fitted the rear side panels yet, but they are black as well. I´ll hand paint the race numbers in silver on the rear fairing later so I won´t have to use duct tape like last year when I forgot all about it until 30 minutes before the race... Cheers! /Anders
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Post by racket on Jun 27, 2016 17:44:38 GMT -5
Hi Anders
She's looking sharp :-)
Yep , it would be very tempting to run the freepower at high rpm all the time , it'd certainly help with those idling temps and there'd be some "interesting" takeoff benefits for a road bike
So when is the next ride on the bike ?? .
Cheers John
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Post by Johansson on Jun 28, 2016 4:36:38 GMT -5
Hi John, She sure does, much better than with the cream white paint full of oily fingerprints. The One Mile race at Föne airbase is scheduled to the 3rd September, I just need to check the bike over for any final bits that needs fixing and make a towing rig so I can haul the bike back to the pits behind a car in case the engine flames out at the end of the race track. I am sooooooo very eager to get the new engine up and running so that I can have an electric motor started bike instead of the simple but air consuming air start. Cheers! /Anders
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Post by Johansson on Jul 14, 2016 16:29:20 GMT -5
About time to get the bike sorted for the One Mile race in september! A to-do list filled with plain jibberish was made on the white board. Last night gearing had top priority, to put less stress on the gearbox I´ve decided to run a tall gearing. A power turbine almost full HP at half its design rpm so I think I will have plenty of power anyway. I stepped up 2 teeths on the front sprocket so now the theoretical top speed is slightly over 360km/h, I can´t go anywhere near that fast with this engine but it is good to have a gearing to grow into once JU-02 is built. I also rebuilt the rev sensor bracket since the new larger gear would hit it. Now it´s better, I zinc coated it after the pic was taken so it won´t rust. Earlier this week I ordered a bike lift which arrived today, the girls helped me assemble it. I can´t believe I haven´t bought one of these earlier, that would have saved me many long evenings standing on my knees on the concrete floor... As you can see I have assembled the rear fairings as well after painting, only need to get some stickers and the race number on it. Cheers! /Anders
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Post by smithy1 on Jul 14, 2016 19:26:20 GMT -5
I'm Jealous..!!
I'd love to be able to run a "flying mile" with you guys one day.....doubt very much whether I'd come close to 300kmh though...maybe 200-ish..!
Great work Anders..!
Smithy.
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Post by finiteparts on Jul 14, 2016 22:09:18 GMT -5
Anders,
It's looking really good with that black finish!
Can't wait to see your next run.
Chris
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Post by pitciblackscotland on Jul 14, 2016 22:35:01 GMT -5
Hi Anders, That's a good investment to have a bike lift. I have just finish off making a workbench and decided to place the trike onto the bench, makes it a lot easy to work on. Cheers, Mark.
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Post by Johansson on Jul 15, 2016 4:51:32 GMT -5
I'm Jealous..!! I'd love to be able to run a "flying mile" with you guys one day.....doubt very much whether I'd come close to 300kmh though...maybe 200-ish..! Great work Anders..! Smithy. Thanks! Damnit that you live on the other side of the planet, they would absolutely LOVE to have your jetcart at the race. I have no doubt that you´d run 200+km/h on the mile. Anders, It's looking really good with that black finish! Can't wait to see your next run. Chris Thanks, I can hardly wait either. Hi Anders, That's a good investment to have a bike lift. I have just finish off making a workbench and decided to place the trike onto the bench, makes it a lot easy to work on. Cheers, Mark. That is a very nice work bench, being able to stand up while wrenching is priceless.
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Post by pitciblackscotland on Jul 15, 2016 7:00:02 GMT -5
I'm Jealous..!! I'd love to be able to run a "flying mile" with you guys one day.....doubt very much whether I'd come close to 300kmh though...maybe 200-ish..! Great work Anders..! Smithy. Thanks! Damnit that you live on the other side of the planet, they would absolutely LOVE to have your jetcart at the race. I have no doubt that you´d run 200+km/h on the mile. Anders, It's looking really good with that black finish! Can't wait to see your next run. Chris Thanks, I can hardly wait either. Hi Anders, That's a good investment to have a bike lift. I have just finish off making a workbench and decided to place the trike onto the bench, makes it a lot easy to work on. Cheers, Mark. That is a very nice work bench, being able to stand up while wrenching is priceless. Thanks mate, yeah your not wrong there when you over 6 foot it makes life a lot easy when working on projects like jet bikes and jet trikes Cheers, Mark.
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ripcrow
Veteran Member
Joined: December 2015
Posts: 114
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Post by ripcrow on Aug 11, 2016 2:16:30 GMT -5
I´ve been thinking about a way to improve the takeoff and raise the power output from the freepower, namely to fit a belt driven drive clutch (like on a snowmobile) on the gearbox output shaft. That way I can adjust the weights and spring load to keep the freepower revs in the upper 3/4´s all the time instead of having to start from 0rpm. Any thoughts about this? I have no idea if I can fit it to the frame and with the JU-02 engine installed I don´t even know if I will need more power, it is just an interesting idea that needs to be bounced around a bit. What about a cvt setup. Basically a pulley split in the middle with one side able to slide away from the other. More torque for lift off has the belt positioned high on the pulley and as speed increases you allow the pulley to open and the belt moves further into the split giving a different ratio drive allowing the turbine to stay in its peak power output. John quoted you have 80% of your power in the bottom 50% of the rev range so the slipping belt / cvt allows you to keep the max power coming from the turbine without getting it over the 50% mark and losing torque.
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Post by Johansson on Aug 16, 2016 0:18:25 GMT -5
That would work but after some consideration the added bulk and complexity of a variable clutch setup isn´t practical. I´ll stick to the simplicity of my fixed gearing. The One Mile race is held in just three weeks! I´ve registered the bike and last night I painted the numbers on the rear fairing and set everything up for a test start today, I need to check the tachometer and adjust the idle a bit before the race. I also added some fancy stickers but forgot to take a picture of the result, it looks race ready now! Cheers! /Anders
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Post by Johansson on Aug 16, 2016 14:02:28 GMT -5
Here are a pic of the stickers we put on the bike last night. Not that anyone would suspect that this bike belongs to any other team than ours, but I still added a Mobacken sticker to it. This morning I started the bike to see if it is ready for the race, I adjusted the idle and found that the tachometer scaling is somewhat off. Oh well, I might have to use the P2 gauge as usual to determine how hard I am running the engine. Can´t trust the tachometer until I have tested it thoroughly. Cheers! /Anders
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Post by racket on Aug 16, 2016 18:33:59 GMT -5
Hi Anders
All looking good for the track.
Yep , P2 gauge for safety , 3 bar should be enough ;-)
Cheers John
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Post by Johansson on Aug 17, 2016 0:59:36 GMT -5
Hi Anders All looking good for the track. Yep , P2 gauge for safety , 3 bar should be enough ;-) Cheers John He he, 3 bar P2 in JU-01. I almost got a hard on just thinking about it... Seriously, do you think the TV94 rotor can do 3 bar in +15°C? I didn´t push the engine above 2.4bar last year and ran 275km/h, if I could increase the pressure to 3 bar the bike will be absolutely flying!
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Post by Johansson on Aug 17, 2016 13:44:11 GMT -5
With my very good friend Bjursingen visiting I finished the towing cart for the bike that I started building long ago, the plan is to shut the engine down at the end of the race track and tow the bike back to the pits. The founder of landracing.com told me about the cart they built for their Bonneville race bike, they made one like this at first but later lengthened it so both wheels were lifted off the ground. I´ve decided to try this version first since it takes up much less space than a 2.5 meter long one. Sure, it was somewhat of a balancing act but as long as the towing car ran slowly it was no problem at all. Great to have this solved, last year I hitched a ride back to the pits by holding on to a three wheeled Spyder bike and that was difficult to say the least... Cheers! /Anders
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