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Post by azwood on Feb 20, 2018 2:49:10 GMT -5
Hi everyone new here but like everybody I love turbine engine's I made a turbo Jet years ago had fun doing that.but this time I want to build a turboshaft engine from a large holset turbo but can't find much info on flame tube dimensions vs turbo size anyone know where to look.
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Post by azwood on Feb 20, 2018 2:52:03 GMT -5
Here is the turbo don't know much about it accept it's got a 100mm compressor wheel think it may be a hx55  |
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Post by azwood on Feb 20, 2018 2:53:49 GMT -5
Here's the I'd tag  |
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Post by racket on Feb 20, 2018 3:21:24 GMT -5
Hi Welcome to the Group . Have a look through this Section first , only a couple of pages jetandturbineowners.proboards.com/thread/680/diy-turbines lotsa helpful stiff Checkout Jetspecs for flametube dimensions www.nuclearprojects.com/jetspecs/Or simply measure the comp wheel inducer and workout its area , multiply the area by 3 times and thats the minimum cross sectional area of the flametube flow area , go for 6 times inducer diameter for flametube length. As for the holes in the flametube , using the inducer area as the total area of all holes in the flametube , 30% for Primary , 20% for Secondary and the remaining 50% for Tertiary . If using propane for fuel then the Jetspecs recommendation of a large number of smallish Primary holes is OK , but if using a spray nozzle and kero then a smaller number of larger holes needed . LOL...........and if you want to waste a few hours , checkout all the builds here in the DIY section for ideas. Cheers John |
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Post by azwood on Feb 20, 2018 3:28:08 GMT -5
Hi Welcome to the Group . Have a look through this Section first , only a couple of pages jetandturbineowners.proboards.com/thread/680/diy-turbines lotsa helpful stiff Checkout Jetspecs for flametube dimensions www.nuclearprojects.com/jetspecs/Or simply measure the comp wheel inducer and workout its area , multiply the area by 3 times and thats the minimum cross sectional area of the flametube flow area , go for 6 times inducer diameter for flametube length. As for the holes in the flametube , using the inducer area as the total area of all holes in the flametube , 30% for Primary , 20% for Secondary and the remaining 50% for Tertiary . If using propane for fuel then the Jetspecs recommendation of a large number of smallish Primary holes is OK , but if using a spray nozzle and kero then a smaller number of larger holes needed . LOL...........and if you want to waste a few hours , checkout all the builds here in the DIY section for ideas. Cheers John Thanks for the info the one I made 10 years back was lpg had a friend help work out the flame tube holes any idear what sort of hourspower I can get from this sort of jet hope to drive a motorcycle with it |
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Post by racket on Feb 20, 2018 15:46:31 GMT -5
Hi
We should be able to get ~1 HP for each 1 pound of thrust the engine produces as a pure jet.
What are the wheel sizes in the turbo , both comp and turb inducer and exducer please , this will give me a better idea as to potential power output
Cheers
John
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Post by azwood on Feb 20, 2018 19:54:52 GMT -5
Hi We should be able to get ~1 HP for each 1 pound of thrust the engine produces as a pure jet. What are the wheel sizes in the turbo , both comp and turb inducer and exducer please , this will give me a better idea as to potential power output Cheers John I'll take a better look the compressor is 100mm not sure of the turbine think there good for 40psi |
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Post by azwood on Feb 20, 2018 19:55:45 GMT -5
How's the torq factor on a turbo Jet?
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Post by racket on Feb 20, 2018 21:48:07 GMT -5
Hi Yeh , once we have the wheel dimensions its possible to get a fair idea of airflow, thrust, horsepower. The torque on a turbine bike with a freepower wheel is pretty good , you only need a single speed gearbox, as Anders does with his home built turbine bike www.youtube.com/watch?v=g4c5by5LPxQCheers John |
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Post by azwood on Feb 21, 2018 2:59:06 GMT -5
Hi Yeh , once we have the wheel dimensions its possible to get a fair idea of airflow, thrust, horsepower. The torque on a turbine bike with a freepower wheel is pretty good , you only need a single speed gearbox, as Anders does with his home built turbine bike www.youtube.com/watch?v=g4c5by5LPxQCheers John Awsome yeah just started talking to anders nice guy |
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Post by racket on Feb 21, 2018 3:15:12 GMT -5
Theres no reason why a turbo based engine can't go as fast , heres some VERY OLD video of my Garrett TV84 turbo based bike www.youtube.com/watch?v=P-5PgWqgIJo .............no sound on my digital camera back in those days , cameras were in kilobytes not megabytes ..............bike being dyno tested www.youtube.com/watch?v=CplnY9TG7NEPower developed is pretty much a direct result of how big a hole in the front of the engine , my TV84 had an 89 mm inducer , Anders bike 98 mm , his new engine 107 mm , my "non worker" 118 mm , can't have too big a turbo :-) Cheers John |
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Post by azwood on Feb 21, 2018 3:21:25 GMT -5
Theres no reason why a turbo based engine can't go as fast , heres some VERY OLD video of my Garrett TV84 turbo based bike www.youtube.com/watch?v=P-5PgWqgIJo .............no sound on my digital camera back in those days , cameras were in kilobytes not megabytes ..............bike being dyno tested www.youtube.com/watch?v=CplnY9TG7NEPower developed is pretty much a direct result of how big a hole in the front of the engine , my TV84 had an 89 mm inducer , Anders bike 98 mm , his new engine 107 mm , my "non worker" 118 mm , can't have too big a turbo :-) Cheers John Interesting my one is 100mm so that should be Ok? Also I thought a stator for a torq converter looks like a fee power wheel hmmm |
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Post by azwood on Feb 21, 2018 4:12:45 GMT -5
Ok got the wheels sizes compressor inducer 81mm wheel 100mm exhurst 95mm and 88 exducer
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Post by azwood on Feb 21, 2018 4:15:29 GMT -5
Also I brought it for $200 as a rebuilt unit I dident think I was but it atuly has a brad new core in it unused what a score
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Post by turboron on Feb 21, 2018 7:51:32 GMT -5
John, please explain your "tight" turbine scroll comment. My understanding is for our DIY turbines we want the highest A/R (largest doughnut) to give us maximum power. I understand that the turbine scroll flow factor must be compatible with the compressor trim. If the turbine scroll flow factor is too low it will force the compressor into surge. If the turbine flow factor is too big it will result in a choked compressor. If one has a factory turbocharger the turbine scroll should be compatible with the compressor trim.
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