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Post by Johansson on Nov 9, 2011 9:50:23 GMT -5
hi.... all looking good, be nice to see more running. thought you mite want to have look at this site racingbatteries.co.uk/ mite be able to save some wieght and space.... look for ward to seeing new video www.diygt.orgGreat link! I have been searching for batteries like those but haven´t found anything useful. Thanks a lot!
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Deleted
Joined: January 1970
Posts: 0
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Post by Deleted on Nov 9, 2011 12:07:06 GMT -5
You are more than welcome.... hope they can help, have meeting on Friday with MD of company, will mention you may well contact them. Just mention the diy gas turbines and he will know what you are doing, as he has seen your thread on jato :-)
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Post by ernie wrenn on Nov 9, 2011 18:36:58 GMT -5
Lets get him up as a member.. Knowledge of batteries and amp CGA is important.
I have gone to 4 military batteries based at 1100 CGA each banked in sets of 2, then paralled together for 24 volts. The golf cart nearly turns over when you back off the trailer.
ernie
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Post by turbochris on Nov 10, 2011 10:33:44 GMT -5
Ernie, you want to get him up? You been helping Richard with that industrial sized wanking machine?
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Post by ernie wrenn on Nov 10, 2011 16:44:06 GMT -5
That sir is a muffin stuffer.... A wanking maching is for the left hand guys.
ernie
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smithy
Member
Joined: August 2010
Posts: 31
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Post by smithy on Nov 10, 2011 18:20:48 GMT -5
That sir is a muffin stuffer.... A wanking maching is for the left hand guys. ernie Oi...!!!!! I resemble that remark...I'm left handed Good for a giggle anyway....Pfffttttt....muffin stuffer.. ;D LOL.. Cheers, Smithy.
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Deleted
Joined: January 1970
Posts: 0
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Post by Deleted on Nov 11, 2011 12:38:10 GMT -5
hi.... all looking good, be nice to see more running. thought you mite want to have look at this site racingbatteries.co.uk/ mite be able to save some wieght and space.... look for ward to seeing new video www.diygt.orgGreat link! I have been searching for batteries like those but haven´t found anything useful. Thanks a lot! Hi have spoken to the guy from battery company today.... he is happy to help any one from the group and forum with question about there batteries.... consumtion etc
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Post by Johansson on Nov 12, 2011 10:21:02 GMT -5
I will measure the total electric consumption during the next run and sent the guy a mail, buying any batteries will have to wait until I have the engine in the frame and know exactly how much room I have left. This is sent from a hotel room in Barcelona on my phone, stomach full of beer, Sangria and paella. Can't say that I look forward to flying home to cold Sweden tomorrow...
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Post by racket on Nov 12, 2011 16:20:22 GMT -5
Hi Anders
LOL, so thats where you've been :-)
Cheers John
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Post by Johansson on Nov 14, 2011 14:19:27 GMT -5
Yup, took my fiancee away for the weekend. Best one in a long time.
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Post by Johansson on Nov 17, 2011 16:45:10 GMT -5
This week I have been building a trolley for the air bottle and this evening I made the engine ready for the test start tomorrow. I will paint the trolley later so it won´t rust. I changed the spring loaded button for the preheat for a regular switch so I won´t have to grow a third arm. ;D Everything hooked up for the test run, keep your fingers crossed for tomorrow! Cheers!
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Post by racket on Nov 17, 2011 22:58:53 GMT -5
Hi Anders
Very business like setup you've got there :-) ....................all the best for a successful test run .
Cheers John
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Post by ernie wrenn on Nov 18, 2011 9:45:38 GMT -5
You know.... Everything starts with just a little thought..... Then by the time we finish, it looks like a EXPLOSION in a wiring factory.. Are we having fun yet? I tend to like the making more than the working... ernie
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Post by Johansson on Nov 18, 2011 18:38:36 GMT -5
Another successful run of the JU-01 gas turbine, today I ran it up to 2.6PR with a max TOT of 720°C so I need to open up the jet nozzle a bit to get the temps down to reasonable levels. When I first tried to start it after some serious preheating I found that the compressor wheel was stuck, the shaft had elongated itself and jammed the compressor against its housing so I had to add 0.2mm of clearance to get it spinning freely again. The next start went better, it wasn´t recorded but I got some sparks out of the jet nozzle that I guessed was pieces of coating ejected. Later on I found that I probably was right about that since the sparks had disappeared when I ran it again. As you can see it runs a bit hot at 720°C. It probably looks worse than it is since it was pitch black outside, if the test was done during daylight it would probably have been noticable at all. The video of the runs, starting is much easier now that I got a larger air tank and can afford wasting some air before the fuel is injected. I am very satisfied with the runs today, I will take the engine apart this weekend and check the combustor and coated parts for any signs of damage. I the long run I will probably have to build an all-stainless NGV housing instead of the coated mild steel NGV I use now but it will do its job during the R&D. Cheers!
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Post by racket on Nov 18, 2011 19:09:05 GMT -5
Hi Anders
Congratulations ..................Another one completed :-)
She'll be making some noise at 2.6PR .......................yeh , 720 C is a bit high for that PR , OK if it was at 3.6 PR , that slightly large NGV throat area is probably to blame , but still well within the ballpark , a few millimetres bigger jetnozzle should fix the temp ...............I'd wait until you've had the engine up to a higher PR before increasing the nozzle size , with a 2.6PR there will only be a ~100 deg C drop thru the turb stage so you're only running a T I T of ~820 C , quite a reasonable temperature .
Cheers John
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