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Post by guywithproblems on Jun 16, 2023 7:43:34 GMT -5
I just finished my second jet build and I have problem with it. Because it won't start. It does ignite but it won't spool up like my last build did. Can somebody help me?
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Post by andym on Jun 16, 2023 12:38:45 GMT -5
pictures and video would help
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Post by guywithproblems on Jun 16, 2023 13:14:10 GMT -5
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Post by pitciblackscotland on Jun 16, 2023 14:16:55 GMT -5
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Post by guywithproblems on Jun 16, 2023 14:42:44 GMT -5
Sorry wrong photo  |
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miuge
Veteran Member
Joined: March 2014
Posts: 199 
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Post by miuge on Jun 16, 2023 14:47:47 GMT -5
That's an enormous size combustor for a turbo that small, maybe lack of air mixing up with fuel? How's the fuel nozzle? More pictures needed of the internals..
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Post by guywithproblems on Jun 16, 2023 14:57:05 GMT -5
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miuge
Veteran Member
Joined: March 2014
Posts: 199
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Post by miuge on Jun 16, 2023 15:23:20 GMT -5
Ihan oikein päätelty sijainnin mukaan  Your setup is very unlike to work with that sort of fuel delivery if you used it as is, you need a radial spray injector something like this: hosting.photobucket.com/albums/x281/mice325/Project%20Jatkettu/WP_002239_zps8d90877f.jpgAlso get rid of that pressure regulator, most of them limit the flow too much or the safety feature cuts off the gas when it sees "backpressure" from the combustor. Try these two tips first before making any further changes. |
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Post by guywithproblems on Jun 16, 2023 15:32:10 GMT -5
Ootko tulos huomenna Turun lentonäytökseen?
I don't understand how the gas system would not work because it had worked absolutely fine on my last build
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Post by racket on Jun 16, 2023 18:19:07 GMT -5
Take muige's advice
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Post by guywithproblems on Jun 17, 2023 0:21:26 GMT -5
I can do the liquid fuel system to it. This might be a dumb question does little air leak (nearly one fourth of the air that goes in) prevent the engine from starting?
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Post by racket on Jun 17, 2023 2:38:06 GMT -5
Yes :-(
Gotta have things sealed up otherwise the turbine becomes underpowered due to less mass flow through it compared to the comp
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Post by guywithproblems on Jun 17, 2023 12:23:59 GMT -5
Ok thanks. Thats what I expected, because I have flame in there and it's strong enough to make my turbine glow red and I have enough rpm for starting the jet.
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Post by guywithproblems on Jul 7, 2023 5:38:41 GMT -5
I read The muige's message again and now it makes perfect sense to me. So thanks muige for your advice
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Your setup is very unlike to work with that sort of fuel delivery if you used it as is, you need a radial spray injector something like this:
