bournaVee
Junior Member
Joined: January 2017
Posts: 66 
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Post by bournaVee on Feb 11, 2017 9:30:23 GMT -5
developing a turboshaft engine to power a helicopter
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 11, 2017 9:32:09 GMT -5
does anyone have any ideas?
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 11, 2017 9:34:06 GMT -5
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Post by jetjeff on Feb 11, 2017 9:55:15 GMT -5
Hi bournaVee,
Hmmm. You may not have enough wedges on your compressor diffusor. I think the number of blades on the compressor wheel, dictates the number of wedges needed. Best to look at the build threads from Anders and John and replicate their work.
Regards
Jeff
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 11, 2017 14:28:33 GMT -5
hi Jeff,
thanks for that input.
been going through their threads, didnt know there was a relationship between the wedges and the compressor blades
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 11, 2017 14:39:45 GMT -5
since making a shaft tunnel is a bit of a problem, im thinking about going the "t-62" way- using the bearing at the front of the engine.
the only worry i have concerning that is heat destroying my compressor wheel;
but yet again, would spraying the comp wheel with ceramic coating prevent heat damage?
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Post by Johansson on Feb 11, 2017 16:08:56 GMT -5
Hi bournaVee! That is an interesting project you are planning, turboshaft engines are (in my humble opinion) much more fun than pure jet engines!  Judging from the questions you are asking in your last post I get the feeling that you need to read up on the fundamentals of gas turbines before you start designing your engine, without a good understanding of how these engines work it is a waste of both time and money to do any actual building. Get a copy of Thomas Kamps book "Model jet engines" and read it through a couple of times, it is a great book and it will answer many of your questions. www.amazon.com/Model-Jet-Engines-Modellers-World/dp/190037191X/ref=sr_1_5?ie=UTF8&qid=1486847243&sr=8-5&keywords=thomas+kampsCheers! /Anders |
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 11, 2017 17:28:41 GMT -5
Hi bournaVee! That is an interesting project you are planning, turboshaft engines are (in my humble opinion) much more fun than pure jet engines! Judging from the questions you are asking in your last post I get the feeling that you need to read up on the fundamentals of gas turbines before you start designing your engine, without a good understanding of how these engines work it is a waste of both time and money to do any actual building. Get a copy of Thomas Kamps book "Model jet engines" and read it through a couple of times, it is a great book and it will answer many of your questions. www.amazon.com/Model-Jet-Engines-Modellers-World/dp/190037191X/ref=sr_1_5?ie=UTF8&qid=1486847243&sr=8-5&keywords=thomas+kampsCheers! /Anders hi Anders, thanks a lot. i will do that. ive also been following up on your ju02 build.. its lovely piece of work to behold more grease to your elbows.. regards, BournaVee |
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Post by racket on Feb 11, 2017 21:31:27 GMT -5
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 28, 2017 6:54:43 GMT -5
hi John,
thanks for the paper, it was really useful
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 28, 2017 6:55:29 GMT -5
its been a while i posted here
been busy with studies
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Post by racket on Feb 28, 2017 15:51:27 GMT -5
Keep those studies going :-)
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 28, 2017 17:33:37 GMT -5
thanks a lot.. i will
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Feb 28, 2017 17:35:13 GMT -5
and please do you know how i can obtain ceramic heat resistant ball bearings?
outer diameter 5cm to 6cm?
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Post by racket on Feb 28, 2017 17:38:41 GMT -5
Often on Ebay
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