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Author Topic: APS/Ω Gas turbine bike build  (Read 420634 times)
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WhizzbangK.C.
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Ed Bennett, Speed Team Doo Kansas City fab shop.




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« Reply #1740 on: November 13, 2017, 04:01:08 PM »

As a general rule house AC wiring is almost never subjected to the kinds of vibration and flexing that vehicles get continuously. It's also usually better protected from the elements.
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Ah, this is obviously some strange usage of the word 'safe' that I wasn't previously aware of.  Douglas Adams
manta22
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What, me worry?




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« Reply #1741 on: November 13, 2017, 04:47:06 PM »

Patrick;

If that table is using amperes RMS, then it is dead wrong. On the other hand, if it is showing the average AC value, which most AC voltmeters measure, then I can believe it.

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
Mobacken Racing
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« Reply #1742 on: November 22, 2017, 01:13:16 PM »

I charged the new LiFePO4 60Ah battery over night and took it out to the workshop after dinner, just for fun I compared the weights of the new battery and my old Deka Dominator. I am lowering the bike weight by 6kg by doing this battery change, great! cool



So, I hooked the battery up and started the pumps. The first thing that happened was that the 30A fuse for the oil pump blew after like 5 seconds, this indicates that the battery is giving more juice to the pump than before. I replaced the fuse holder with a length of 6mm2 wire and tried it again with better luck. The + cable gets just noticeably "warm" but nothing that I need to worry about. Might add a larger fuse later.



Anyway the oil pressure is rock solid, nothing like before when the pressure started to drop after a dozen seconds or so. Success! Smiley

Cheers!
/Anders
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Mobacken Racing
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« Reply #1743 on: November 26, 2017, 09:40:01 AM »

Hi guys!

I test ran the engine today with the new battery, the oil pressure is much more stable now although the prolonged test heated up the oil until the pressure started to fall down to 3kg.

I ran the engine up to 3bar P2 where the engine was really screaming, my trusty foam plugs was nowhere near enough hearing protection so I need to use my artillery ear muffs on top of them next time. You can see the flag starting to wave from the air flow when I throttle past 2 bar, and the shed doors started to close from the jet stream passing by. Smiley

Exhaust temps were in the high 650°C region at 3bar P2, perfect since the temps will go up a bit when I push the engine toward 4 bar later. When I shut the engine down a compressor rub can be heard, I will investigate it when I disassemble the engine later. Shaft play feels ok and nothing is rubbing now so hopefully is isn´t anything serious.



Cheers!
/Anders
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Peter Jack
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« Reply #1744 on: November 26, 2017, 10:20:49 AM »

Another amazing performance Anders. Well done.  cheers cheers cheers

Pete
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manta22
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« Reply #1745 on: November 26, 2017, 10:43:24 AM »

Excellent!   cheers

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
Mobacken Racing
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« Reply #1746 on: November 26, 2017, 04:59:33 PM »

Thanks!

I am slowly getting there, the goal is to have the engine running at 4bar for a full minute with stable oil pressure and 700-ish°C exhaust temps, then it is time to install it in the motorcycle. I won´t be rushing it since I am rather enjoying this relaxed period of testing and tuning. cool
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Mobacken Racing
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« Reply #1747 on: January 07, 2018, 06:35:09 AM »

Happy new year folks! Lately I´ve been working on a turbofan powered ice yacht with a friend and we have a shitload of work to do before the race two months from now, but I have still managed to get a few things done on the bike.





I have made a new oil regulator and fitted larger bore AN8 oil lines since the old AN6 lines were restricting the flow, and with a change from 0w30 to 20w50 oil I now have a very stable 5kg oil pressure at the entry of the engine.





When I have built the turbofan engine and installed it in the ice yacht chassis I have some room on the work bench to disassemble the JU-02 engine and inspect it after the runs, I will also check if I need to open up the axial compressor clearance a tenth of a mm or two since I heard some rubbing during the last run.

Cheers!
/Anders
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thefrenchowl
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« Reply #1748 on: January 07, 2018, 06:39:49 AM »

Happy New Year, Anders, and fingers crossed...

Patrick
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...What exactly are we trying to do here?...
Mobacken Racing
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« Reply #1749 on: January 13, 2018, 03:28:26 PM »

Happy New Year, Anders, and fingers crossed...

Patrick

Thanks Patrick! smiley
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