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Post by Johansson on May 1, 2016 1:18:09 GMT -5
I am crossing my fingers, toes and nuts for the next test run to be successful!  |
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Post by racket on May 1, 2016 23:54:54 GMT -5
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Post by pitciblackscotland on May 2, 2016 0:21:54 GMT -5
Good one John  Looks like you had some good temps there as well Next will be some full power runs  Cheers, Mark. |
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Post by Johansson on May 2, 2016 0:26:20 GMT -5
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Post by enginewhisperer on May 2, 2016 0:27:03 GMT -5
good stuff!!
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greazy
Veteran Member
Joined: December 2015
Posts: 128
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Post by greazy on May 2, 2016 0:44:13 GMT -5
that's kickass John!!! good work? |
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Post by racket on May 2, 2016 0:55:35 GMT -5
Thanks guys :-) Yep , an almost perfect start , starter applied up to ~30,000 rpm and she accelerated away to the ~58 kpa - 8 psi idle , a fortunate pre spoolup setting of the throttle , used ~1 litre of kero during the run , there was a big difference between the two thermocouples , maybe a fuel manifold problem , but all in all , a satisfactory test run , I'll need to find an unpopulated area to do some higher power runs as she's a tad noisy. Heres some more video of a bloke having fun youtu.be/dlz4XWHS3y4Cheers John |
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Post by smithy1 on May 2, 2016 1:37:31 GMT -5
Excellent mate... :-)) Knew you'd get it.
Do you think the divergent pipe was the difference...or just the extra voltage/fuel pump/starter etc...??
650C a bit high for idle maybe?? Not too bad though.!
Well done Sir. Didn't cross my nuts for you...they don't work anymore ;-) Call me Xmas balls...they're just there for decoration..!
Cheers,
Smithy.
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Post by racket on May 2, 2016 4:22:32 GMT -5
Hi Smithy
The battery was the problem , just not capable of running everything , by swapping the oilpump onto one of the starter batteries it allowed the fuel pump to maintain pressure , that and the extra power from the bigger starter motor made for an easy start ..............LOL, relatively easy , the first attempt today was aborted because I forgot to have the leafblower going , the second one because I'd dislodged the sparkplug lead moving the test stand from the workshop , so third time lucky .
Yeh , 650 C is a bit high , I'll have to wait until I do some high power runs to find out if there needs to be some "mods" made , ...........because this engine has a very "open" turbine stage its going to need high temps to function , and as max rpm is only 60,000 I'm sorta hopeful the temps won;t be a problem, I've designed for a max 900C TIT , so ~750 C coming out at full throttle , so I've got a bit to play with ...........but I'm not out of trouble by any means ...........I'm hoping that once I get up to higher power settings I'll be flowing roughly where I want to be "on the map" , whereas at low settings I'm not sure where I am , and if its in a low efficiency region then temps will be higher than desirable .
At least the first hurdle is over , plenty more to go :-)
Cheers
John
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Post by stoffe64 on May 2, 2016 5:20:22 GMT -5
Congratulations my friend on your successful start,looking good i thanks
Cheers /stephan
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Post by turboron on May 2, 2016 10:10:06 GMT -5
Congratulations my friend on your successful start,looking good i thanks Cheers /stephan John, your hard work pays off. |
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gtbph
Veteran Member
Joined: August 2013
Posts: 101 
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Post by gtbph on May 2, 2016 14:21:09 GMT -5
Congratulations John! Nice to see it run, thanks for the videos. It's hard to believe that this is just idle, and there's even a diffuser fitted... I wonder what sound she will make at full power  Cheers, Alain |
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Post by smithy1 on May 2, 2016 14:38:48 GMT -5
Hi Smithy The battery was the problem , just not capable of running everything , by swapping the oilpump onto one of the starter batteries it allowed the fuel pump to maintain pressure , that and the extra power from the bigger starter motor made for an easy start ..............LOL, relatively easy , the first attempt today was aborted because I forgot to have the leafblower going , the second one because I'd dislodged the sparkplug lead moving the test stand from the workshop , so third time lucky . Yeh , 650 C is a bit high , I'll have to wait until I do some high power runs to find out if there needs to be some "mods" made , ...........because this engine has a very "open" turbine stage its going to need high temps to function , and as max rpm is only 60,000 I'm sorta hopeful the temps won;t be a problem, I've designed for a max 900C TIT , so ~750 C coming out at full throttle , so I've got a bit to play with ...........but I'm not out of trouble by any means ...........I'm hoping that once I get up to higher power settings I'll be flowing roughly where I want to be "on the map" , whereas at low settings I'm not sure where I am , and if its in a low efficiency region then temps will be higher than desirable . At least the first hurdle is over , plenty more to go :-) Cheers John Excellent work nonetheless. LOL...You're suffering "old man" syndrome, like me..I often forget the silliest of things...forget to put my earmuffs on, forget to connect igniter battery etc.etc. I have a start procedure/list...and quickly forget to look at it.. LOL ;-) 60k max..! She's a big girl then...The open turbine may be an issue when trying to get some decent power out of it when "on the map"...might be a bit temp limited, 150C across the turbine will be a very reasonable result though, at least she runs nicely, sounds good too. I hear turbines run a lot...but I still get a thrill when hearing one spool up. I assume you'll be attempting to run ~40psi P2 max..? Had the "Beast" up around 37-38psi on the weekend...sounded fantastic too, certainly tries to re-arrange ones organs!! There's something about the larger machines that just sound "right". The smaller ones have a different vibe to them. I have a couple of spare car and motorcycle batteries which I can bring up with me, just in case you may need them..! I look forward to seeing you and your latest work of art on the weekend...! Hopefully the weather will be kind to us. Cheers, Smithy. |
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ripp
Veteran Member
I'm sorry, I don't speak english, so I torment you (and myself) with a translation program,Sorry
Joined: January 2013
Posts: 237
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Post by ripp on May 2, 2016 15:40:59 GMT -5
Congratulations John! I thought, you will not manage this huge compressor wheel connects to the turbine wheel from tv94 in this engine. I am very curious to see how will be the measured values at full throttle. Please explain me: you always say be careful with turbochargers which have small turbine wheel. how is it possible to use a compressor wheel which has 45% more inlet area than original.   and now the thing with the throat width.  But you are using the same angle of 30° in the 10-98 engine,I thought the compressor is going in the surge line. Cheers Ralph translate.google.at |
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Post by jetjeff on May 2, 2016 15:41:44 GMT -5
Hi John,
Congratulations!! Looks like 'Fat Boy' is burning some serious calories,,,LOL.
Jeff
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