jettoymaker
Junior Member
Joined: September 2010
Posts: 55
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Post by jettoymaker on Mar 2, 2015 4:10:56 GMT -5
Well done Anders, too hairy for me. I will let the young and the mad do test runs at that level. That horizon came up very fast. It should be much nicer on a good bit of road but it better be a long straight one as it looks like you don't enjoy stopping once you are going. LOL
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Post by Johansson on Mar 2, 2015 6:00:04 GMT -5
Woh that flag must have caused a bit of a pucker in the underpants..... The track seems quite short, can't wait to see what you can do at full noise on Bonneville.... Cheers Ian.. On saturday I ran the shorter course, 1000m to gain speed then a measured 1000m. The longer track had 1500m before the measured distance started but the cars made deep tracks in it so the shorter course was much smoother since only bikes and vehicles on runners were allowed there. There is a flying kilometer race in Färilla on an old military base this summer held by Landracing.se, hopefully I will have the bike ready for it and get some real speed out of it. 300km/h would be nice. Well done Anders, too hairy for me. I will let the young and the mad do test runs at that level. That horizon came up very fast. It should be much nicer on a good bit of road but it better be a long straight one as it looks like you don't enjoy stopping once you are going. LOL Thanks Andrew! Running on ice was a new experience for me, a bit exciting with the front wheel wobble at 200+ km/h... *LOL*
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Post by frankenhealey on Mar 2, 2015 6:07:30 GMT -5
Anders,
I've just watched the video and all I can say is AWESOME!
Cheers,
Ian
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Post by Johansson on Mar 2, 2015 13:50:52 GMT -5
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Mar 2, 2015 19:32:14 GMT -5
Great run Anders, just wondering the pieces flying out the back on the run, are they off the bike or just debris on the track? Would love to see you run it at Lake Gairdner in Australia, 10 miles of the best salt in the world www.dlra.org.au/2015.htmOnly problem is we are on the opposite side of the globe Cheers Ian...
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Post by Johansson on Mar 3, 2015 0:11:51 GMT -5
They are the race number stickers (or what they are called) that falls off, guess the glue wasn´t all that good.
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Post by ernie wrenn on Mar 3, 2015 15:26:50 GMT -5
High speed tail wiggle... exciting!
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Post by Johansson on Mar 3, 2015 16:21:08 GMT -5
Very exciting.
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Post by Johansson on Mar 4, 2015 1:34:22 GMT -5
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Post by pitciblackscotland on Mar 4, 2015 1:59:09 GMT -5
Hi Anders, Nice photo, I except you will get some media coverage on your turbine bike run ?? Excellent work mate. ALL-HAIL TO THE NEW DIY JET BIKE KING!!!! Cheers, Mark.
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Post by Johansson on Mar 4, 2015 10:03:29 GMT -5
Thanks Mark! I am not sure if I will keep that title for long after Andy has taken his bike to the tracks, but I promise to take it back later if I lose it. No time to rest if I want the bike to be race ready this summer, I removed the engine from the frame today to do a complete check of the engine and drive train. With the chain out of the way I could remove the secondary gearbox sprocket to check it for wear, I was quite nervous when I turned it over since I sort of expected to find grinded down teeth all blue from overheating... What a pleasant surprise, not much wear at all! A slight polished surface but no wear to speak of. The magnetic plug has some fine metal dust on it but no rastafari haircut so it is as expected from new gears. The pinion gear is a bit more polished but still no direct wear or signs of heat, the 2bar oil jet lubrication must be working. If any gear expert have an opinion I would like to hear it. Time to pull the cover of the engine, the first thing I found was some wooden chips that must have gotten into the air box when we cut wood for the oil drum BBQ. *LOL* I didn´t have time to pull the rotor out of the shaft tunnel, but there is a clear leak behind the turbine wheel past the piston ring seal. I am not sure why the leak only gets serious at high boost pressures, it has never leaked any oil during the stationary tests at low P2´s but after both Speed Weekend runs the entire rear of the bike was smeared in oil that must have been coming out past the engine cover O-ring seal around the compressor housing. Perhaps the air pressure gets into the oil scavenge line and puts a back pressure in the oil sump so the oil gets forced out through the shaft seals? Could the scavenge pumps even be restricting the oil flow back to the oil tank at higher boost pressures? Plenty of food for thought. Cheers! /Anders
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Deleted
Joined: January 1970
Posts: 0
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Post by Deleted on Mar 4, 2015 14:21:29 GMT -5
Hi Anders
so pleased things went well, and very impressed with the speed you got up to on the ice :-),
think you mite be right about oil and pressure from the engine...... I had a similar problem with my oil system, but for me it was the shaft power reduction box getting over full, because the extra volume of air in the oil meant the scavenge pump struggled to return it all, luckily it sorted itself a little once the shaft power unit was moving as the extra oil got sloshed about and a few plumbing changes, but I did find a much larger return to tank hose helped
Andy :-)
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Post by smithy1 on Mar 4, 2015 14:29:13 GMT -5
Hi Anders,
Firstly....a huge congrats and Kudos for your efforts in just getting the bike ready to go, let alone achieving the speeds you did, well done Sir. I wish we had a similar speed event here in Aus to go to, there is an event in South Australia each year but it's a good 15-16 hour drive each way from my home... I'm not even sure if they would allow the use of our types of vehicles...I must look into that a bit more..!
Those gears look OK, if there was any major problem it would certainly show up, those polish marks are quite normal and I'd actually be quite surprised if they weren't there. Turbine looks fine too, no heat distress visible, the oil leak may just be something simple like a worn/broken ring. Looking at the video your P2 was ~2.4bar (~35.2psig), If your P2 pressure is less than the system oil pressure I doubt it would cause a leak.
Is there any way the P2 pressure can get into the scavenge area..?? I'm pretty sure your oil tank has a vent so it shouldn't pressurize the tank either..? As Andy mentions, a nice big scavenge/drain back to tank is a given. The drain John fitted to the 6041 on my go-kart is more than twice the area of the supply line and it's only gravity feed too....works fine.. and even after several back-to-back runs with plenty of oil temp there is no evidence of "heavy breathing", the oil tank breather and overflow catch tank is still clean...which is a relief.
An oil leak into the turbine area would obviously be burnt out the exhaust, is there any evidence of burnt oil in the free turbine/exhaust area??
Cheers, Smithy.
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Deleted
Joined: January 1970
Posts: 0
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Post by Deleted on Mar 4, 2015 14:46:24 GMT -5
Hi Anders, Those gears look OK, if there was any major problem it would certainly show up, those polish marks are quite normal and I'd actually be quite surprised if they weren't there. Turbine looks fine too, no heat distress visible, the oil leak may just be something simple like a worn/broken ring. Looking at the video your P2 was ~2.4bar (~35psig), If your P2 pressure is less than the oil pressure I doubt it would cause a leak. Is there any way the P2 pressure can get into the scavenge area..?? I'm pretty sure your oil tank has a vent so it shouldn't pressurize the tank..? An oil leak into the turbine area would obviously be burnt out the exhaust, is there any evidence of oil in the free turbine/exhaust area?? Hi Simthy The air gets into the oil gallery, just does :-) the oil comes out looking a little like it been whipped, as a result its volume can increase, plus air can pass by the o ring seal and into the return line, all these things could result in the return line getting a little stalled, not allowing the oil to freely return, which could result in the return gallery filling, seen it happen, when mate oil filled oil tank and did not leave space for increased volume in the tank, the oil could not get back to tank freely so oil leaked past seals in the turbo. Think Anders has return pump which if the oil increased in volume, it may be more than it can handle.... but as we know oil goes at the best of times places you don't want :-) just seen your video of the kart, looking good :-)
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Post by smithy1 on Mar 4, 2015 18:05:35 GMT -5
Thanks Andy....helps explain his issue I guess.
Yeah...the kart is coming along nicely....I actually ran it again on Tuesday, tried some more fuel in the A/B....it then started to do the "High pitched squeal" thing, damn it's loud too!!....the A/B lights off ok but only at low rpm/P2....at higher P2's it is a bit too "hit 'n miss", I'm going to open up the tail pipe exit a bit at a time to see if it helps, I suspect it's a bit "choked" up at the moment...John also recommended I open it up a tad some time back, so I'll do a little at a time and see how it goes....apart from that the engine is running really sweet and starts easily.
Cheers, Smithy.
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