sven
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Joined: February 2012
Posts: 102
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Post by sven on Sept 14, 2012 9:39:43 GMT -5
Hi, I was started building a turbine, witch is based around Holset HE55 turbo. Its gonna called SR1. First its gonna be just gas producer, later Id like to add free power unit to power my motorbike. But first chapter is make good working engine. Turbo is brand new, from Volvo excavator. Comp inducer is 70mm, and turbine exducer is 80mm. Right now I'm making CC leg to join CC and turbo together. I don't have lathe, so its pain in the ass:D For now all is made by using regular hand tools. Good advice is always welcome! Sven Pics.
 This turbo have forged comp wheel vs holset HY55 comp     LOL.. Cig pack   Vanes for turbine(not final just shown)   |
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sven
Veteran Member
Joined: February 2012
Posts: 102
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Post by sven on Sept 16, 2012 9:27:04 GMT -5
Hi,
Any ideas about Comp.C lenght for this kind of engine?
Should I make it bit longer, not 100% sure:(
Thanks
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Post by racket on Sept 16, 2012 21:12:51 GMT -5
Hi Sven
As you'll be needing multiple fuel injection points around the annular flametube ,the flametube length need not be as long as a single point fuel injection engine , what fuel will you be using and what fuel delivery system??
Cheers
John
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sven
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Joined: February 2012
Posts: 102
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Post by sven on Sept 17, 2012 11:18:19 GMT -5
Hi John I will be using vapor tubes and EFI fuel pump. (no high pressure) For fuel I was thinking to use kerosene, for preheat propane. For turbo lube system I will use small automotive Power steering pump and dc motor to turn it. Pressure, when engine is on load must be at least 2 bar. Maximum permissible operating pressure is 4 bar. Recommended oil flows for the turbocharger is 3 litre/min at idle and 3.5 - 4.5 litre/min above maximum torque speed. For ignition I made 30Kv, 300 pulse per sek ignitoncoil draiver.  Hot spark:) jetspecs calculator gave me 420mm lenght of flame tube.   Sven |
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Post by racket on Sept 17, 2012 16:24:13 GMT -5
Hi Sven
Your annular flametube will be similar to a "normal" micro type engine's flametube except that yours will surround the exhaust whereas the micro surrounds the shaft tunnel , so you should be able to reduce the length considerably over what jetspecs recommends for a "sore thumb" combustor , certainly less than half and probably closer to 1/3rd the length ..................checkout the flametubes that Anders and I have made in our respective build Threads .........."Landspeed Bike" and "10/98 "
Your larger diameters will produce the required volume from a smaller length , its the volume thats more important than the length .
Cheers
John
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sven
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Joined: February 2012
Posts: 102
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Post by sven on Sept 18, 2012 10:28:53 GMT -5
Thanks, you and Anders are big mentors for me! I respeckt how you guys building yours engines.  sven |
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Post by Johansson on Sept 18, 2012 11:26:51 GMT -5
Hi Sven! An interesting project you´ve got there, follow John´s advice on the flametube and you will have a compact, fine running engine in no time. I am flattered by your praise, but John is the mentor and I am merely a sparsely bearded apprentice... Cheers and keep up the good work! /Anders |
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sven
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Joined: February 2012
Posts: 102
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Post by sven on Sept 18, 2012 13:05:25 GMT -5
Haha:D good one, but thanks for a good word. I gonna give best shot to get this thing running:)
Sven
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sven
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Joined: February 2012
Posts: 102
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Post by sven on Sept 22, 2012 14:48:34 GMT -5
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sven
Veteran Member
Joined: February 2012
Posts: 102
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Post by sven on Sept 23, 2012 12:06:18 GMT -5
Hi, Today I made final flanges for combustor leg, they are ready to weld:)    Also I was starting to work with turbine vanes.  Sven |
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jdw
Member
Joined: January 2012
Posts: 41
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Post by jdw on Sept 23, 2012 18:51:36 GMT -5
Hi Sven,
Great build! I'm curious about your NGV. How did you make it or was it from something else??
Thanks
Justin
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sven
Veteran Member
Joined: February 2012
Posts: 102
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Post by sven on Sept 24, 2012 9:33:22 GMT -5
Hi Justin,
NGV is taken from Holset variable vane turbocharger. I'm gonna use it cause I already have it, and its fits like a clove:) You can make it on yourself also, but here is lot of work already done for you.
Vanes need to be cut into right height and shape. Right now I'm waiting my new welder to arrive from Germany(eBay), then I can go further with my build.
Sven
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sven
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Joined: February 2012
Posts: 102
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Post by sven on Oct 1, 2012 15:05:26 GMT -5
Hi,
Right now my combustor outer case is 210mm long, John said that i could make half/close to 1/3rd the length that jet specs said.(420mm) That's between 205-140mm. Before I cut it to lenght I d like to know what you guys recon? I was thinking to go with 160mm lenght.
Sven
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Post by racket on Oct 1, 2012 16:08:02 GMT -5
Hi Sven
If in doubt, make it longer , a millimetre too short will give combustion problems , a metre too long won't.
As your combustor is only from the bearing housing back , you'll probably get away with 160mm as long as you have a sufficient number of fuel injection positions around the flametube endcap
Cheers
John
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sven
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Joined: February 2012
Posts: 102
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Post by sven on Oct 2, 2012 10:31:50 GMT -5
Thanks John
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