dieselguy86
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Post by dieselguy86 on Jul 21, 2018 21:05:11 GMT -5
Have 2 24v ones on my twin turbo v10 deutz engine, work extremely well, i believe its just a compression fitting, not sure of the size though, somewhere around 4mm or so.
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dieselguy86
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Post by dieselguy86 on Feb 10, 2018 20:44:47 GMT -5
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dieselguy86
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Post by dieselguy86 on Feb 4, 2018 8:03:01 GMT -5
Is this what you are trying to do?
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dieselguy86
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Post by dieselguy86 on Nov 19, 2017 8:48:34 GMT -5
Hi John, Have you ever checked the direction of your exhaust with a metal flag, as Kamps talked about in his book (page 93 - 3rd edition)? "A minor swirl angle of up to 15 degrees in the direction opposite to turbine rotation is normal. A greater reverse swirl usually indicates too great a reaction level (not sure what that means). Narrowing the cross-section of the turbine nozzle guide vane system whilst enlarging the rotor cross section should remedy the situation." Regards Jeff Jeff, better take good care of that book, they're up to $450 on amazon! John, ive seen pre-swirlers advertised before for turbos to "decrease spool-up time". Its funny though i thought that IGV were always meant to straighten flow so the compressor got a better "bite" of air. And thank you for sharing that link, i saved it for future reading. -Joe
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dieselguy86
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Post by dieselguy86 on Nov 18, 2017 23:28:24 GMT -5
I hate to go off topic but Tony, is your site "name" the chemical formula for nitromethane?
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dieselguy86
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Post by dieselguy86 on Nov 15, 2017 19:32:36 GMT -5
John
What does the electric motor spin the rotor up to "dry"? Im curious if your starter just isnt spinning it fast enough?
My wren 44 turboshaft engine will spin the engine up to ~20,000rpms dry, and struggles to get it to 30,000 rpms during startup. If the o-ring in the bendix is wore too much ill have hung starts around 28k and rising egt's. Has to hit 30k to disengage the starter.
Joe
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dieselguy86
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Post by dieselguy86 on Oct 2, 2017 8:55:20 GMT -5
Anders,
I use LiFe and LipPo batteries daily, Life batteries put out decent but take longer to charge. Lipo batteries put out a TON and can charge very rapidly depending on who's batteries you get. I have an opti-power 6s 5,000mah that will put out 100a continous, 500amp burst. Theres no soldering or anything needed, just plug it into your charger and go. I also have a thunder power battery that can be charged at 8c. 1c is whatever mah the pack is. So if you have a 5,000mah pack, 1c is 5,000mah, or 5amps. 2 c is double that, 10,000mah/ 10amps, 3c =15,000mah/15 amps etc. so a 5,000mah pack that puts out 50c continous is 50cx5,000mah= 250,000mah/250amps.
The biggest thing with lipo's is to not let them over discharge, and not to store them at 100% charge. Need to watch voltage and not let it get below 21v on a 6 cell battery. If a 5,000mah pack will put out 5amps for 1 hour, then putting out 10x that amount will drain the battery 10x faster, so roughly 6 min of runtime, per battery. So 4 batteries wired in series would give you 24 mins of full-throttle running. If you charge them at 4c (20amps) your looking at around 20min to charge.
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dieselguy86
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Post by dieselguy86 on Mar 30, 2017 14:39:03 GMT -5
VERY interested in how you power the fan. Usually its powered by a seperate spool, will yours be this way? This will be absolutely AWESOME to watch!!
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dieselguy86
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Post by dieselguy86 on Jan 20, 2017 21:05:19 GMT -5
Hi Racket
Ahhh, yea, for some reason i was thinking a front cover. Well one thing is for sure, Anders will figure it out.
-Joe
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dieselguy86
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Post by dieselguy86 on Jan 20, 2017 18:12:25 GMT -5
Hi Anders
Is the cover under much stress? Maybe weld some m4 studs around the engine, then slot the cover so it slides on and off. Way faster to loosen some nuts and slide it off vs taking out alot of bolts. Just a thought
-Joe
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dieselguy86
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Post by dieselguy86 on Dec 19, 2016 19:06:11 GMT -5
Hi John,
Inco is also EXPENSIVE as i know your aware of, figured stainless would be cheaper for testing. Id rather go through 5 stainless wheels to get 1 good inco wheel, than go broke after the second trashed inco wheel.
Perhaps ceramic coat the SS for a tad more insurance? Im probably wrong here but was my initial thoughts.
Dub her, "Big Bitch" or "Fuel Whore"
Joe
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dieselguy86
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Post by dieselguy86 on Dec 19, 2016 18:40:56 GMT -5
Hi John,
Hmmmmm give me some dimensions and ill run a disk of SS to the machine shop around the corner from me. They have several 5 axis mills and make turbochargers daily.
-Joe
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dieselguy86
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Post by dieselguy86 on Dec 19, 2016 12:50:53 GMT -5
Hi John,
Ah ok i understand now. Are we approaching the age of diy "multi-stage turbine" engines? Like you stated the turbine that normally drives this is not suitable for gt use. Id love to hear the roar that compressor could support. The 6x-mm compressor in my AMT rc turbine borderlines cackles in your ear drums at full tilt.
-Joe
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dieselguy86
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Post by dieselguy86 on Dec 18, 2016 23:30:02 GMT -5
Hi John, Yep, HX82/83, thats the largest wheel ive been able to find. Thats not a terrible price, i had a quote from jetmax for finished 70mm wheel and NGV shipped for ~$620USD. www.jetmax.ch/en/turbine_wheels.htmAre you saying the 4th stage c20 wheel is designed for a higher pr? Since the compressor cant meet the pr requirement the turb wheel has to be "resized" to better match the lower pr of the compressor? Another option would be to design a wheel according to kamps book, have someone design it in CAD, send it to me and i can have it 3D printed in inconel. I know its not as advanced as commercial wheels, but it can be tailored to your needs, something to think about.
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dieselguy86
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Posts: 186
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Post by dieselguy86 on Dec 18, 2016 16:57:05 GMT -5
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