Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 8:57:03 GMT -5
thanks for the quick response. hope i wont mess up the site with my beginners questions..
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 9:35:23 GMT -5
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 9:41:37 GMT -5
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 9:51:55 GMT -5
the fuel manifold was made from a brass pipe and capillary, but the main fuel nozzle is a 23g string needles. since i couldn't braze the stainless needles i had to protect it from the heat by coating it with the brass capillaries. for the brazing, i made use of easyflow since it melts at a lower temperature.
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 9:54:34 GMT -5
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 9:58:03 GMT -5
for the combustor, this is were i will be needing more and more help from you, i made this looking at the ones already exist, not minding how sensitive it could be. thanks for JATO that brings everything open...
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 10:00:08 GMT -5
i suffered from heavy leakage because of poor design of oil gallery which will be my first step of modification
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 10:02:42 GMT -5
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 10:06:34 GMT -5
you can see the signs of oil leakage from the above pics. i think introducing a turbo bearing kits will solve my problem of oil leakage based on the magics i have seen here.
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 10:10:49 GMT -5
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 20, 2016 10:15:36 GMT -5
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Post by racket on Apr 22, 2016 18:55:09 GMT -5
Hi Chuks
So what didn't work with this engine when you tried to run it ??
Cheers John
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Post by jetjeff on Apr 22, 2016 21:10:11 GMT -5
Hi Chuks,
Great looking engine, thanks for posting the pictures. You can tell many hours went into this build.
So, is your problem with the bearings? Are you using standard ball bearings (with a ball cage), or angular contact full compliment (no cage) bearings? If angular contact bearings are used, they need pre-load, usually by means of a spring or wave washer.
Jeff
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Post by racket on Apr 22, 2016 23:13:15 GMT -5
Hi Chuks
Theres a couple things I've noticed from your pics .................your fuel injectors are pointing straight down the evaporators instead of squirting onto the inner wall , your turbine NGV has fairly large flow areas from the relatively high angle , your comp diffuser vanes seem to be set at a very low angle at their leading edge .
Cheers John
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Chuks
Senior Member
Joined: August 2015
Posts: 498
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Post by Chuks on Apr 24, 2016 13:02:02 GMT -5
hi John, when i try to run the engine i usually have flame out no much increase in the RPM, though no RPM reader was mounted. as for the diffuser i used something like this
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