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Post by smithy1 on Feb 8, 2015 16:02:23 GMT -5
Hi John,
Your original brace to the chassis/seat mount is indeed still there and works well, so doing what you suggest is probably a good idea, I could quite easily make a "band" to go around the pipe and run the support off the top instead of the bottom. I was just a bit worried about the weight/leverage hanging off the turbine housing, it's stressed enough without anything else trying to bend it in different directions.
Cheers,
Smithy.
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Post by smithy1 on Feb 8, 2015 16:07:46 GMT -5
Nice work, looking forward to seeing it roar :-) Thanks Andy....I used your gokart pipes as inspiration...glad it meets with yours and John's approval..  Getting time to play with it is my biggest issue....work keeps getting in the way..  All I have to do now is make it work as it should....lots of noise, fire and corruption is the order of the day..  Cheers, Smithy. |
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Deleted
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Post by Deleted on Feb 8, 2015 16:22:59 GMT -5
Sure you will have it working you soon, I have modelled my bendix for starting the bike on yours :-)
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Post by smithy1 on Feb 8, 2015 16:30:51 GMT -5
Sure you will have it working you soon, I have modelled my bendix for starting the bike on yours :-) Really...?? I'll be very interested to see that in action....Mine is still not working as I would like, I can get it to turn the engine over without drama....but it just doesn't like to let go once the engine is up to self sustain, a "re-design" of the coupling is required. To be honest I've not done much work on that...the good old-fashioned blower works fine and is pretty much "idiot proof"...trouble is...we keep producing better idiots..!  Cheers, Smithy. |
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Post by Deleted on Feb 8, 2015 16:51:44 GMT -5
Hope mine lets go, its only pushing on the snub ( cone on the front ) of the nut :-) will video and post soon
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Post by smithy1 on Feb 8, 2015 17:50:38 GMT -5
Hope mine lets go, its only pushing on the snub ( cone on the front ) of the nut :-) will video and post soon Yeah...mine was also pushing on the nose of the comp nut but failed to let go more often than not, the nut on the 6041 is actually part of the impeller casting and not a real nut as such and has some balancing cutouts in it. John and I discussed using an "inverted cone" system we had seen before, I'll need to dismantle the turbine to do that properly though....I'd rather not pull it down as it's starting & running so sweetly atm. For the time being, the blower will suffice. Cheers, Smithy. |
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Post by enginewhisperer on Feb 9, 2015 0:50:00 GMT -5
good stuff! pretty keen to see it go  I also picked up a nice turbo recently that could go well on a go kart frame. It's a bit smaller than a 6041, but a lot lighter! |
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Post by smithy1 on Feb 9, 2015 2:02:42 GMT -5
good stuff! pretty keen to see it go I also picked up a nice turbo recently that could go well on a go kart frame. It's a bit smaller than a 6041, but a lot lighter! Hey Andrew, C'mon then... don't keep us in suspense....details man..!! |
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Post by pitciblackscotland on Feb 9, 2015 5:21:36 GMT -5
Hi All, Finally... after several weeks of me faffing around, I've fitted the new A/B pipe and plumbing to the "Beast", unfortunately I have yet to run it  , was hoping to give it a test run during the car show I was at yesterday, but it just wasn't safe to do so, too many little children running around, better safe than sorry I suspect:   Still need to fabricate a rear support for the pipe, not real happy with all the weight hanging off the turbine housing....I'll get there eventually.. There are three fuel feeds to the pipe, one is the main A/B spray ring, which can be seen underneath, the other two are supplementary feeds on either side via a 1mm nozzle in each for "flame show" requirements, these can be enabled/disabled via a separate flow control as required. There's also a RR250-C20B ignitor placed just downstream of the flame holder and in the divergent cone, essentially it's a backup ignition source which can also be enabled/disabled by a separate switch...this is to augment the ignition provided by the hot streak, which can be seen entering the outer combustion housing in the first pic. Probably a bit of overkill but....just can't help myself.. Cheers, Smithy. Hi Brett, Nice work on the A/B pipe Cheers, Mark. |
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Post by enginewhisperer on Feb 10, 2015 23:49:28 GMT -5
Hey Andrew, C'mon then... don't keep us in suspense....details man..!! It's a Garrett T18A40 91mm in, 127mm ex compressor, and 106mm turbine exducer (should be 129mm turb wheel but I haven't convinced the housing to come off yet) It came with all the v band clamps, etc which is nice |
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Post by smithy1 on Feb 11, 2015 0:20:27 GMT -5
Hi All, Finally had a chance to run the "Beast" with it's new pipe today...luckily I'm not like John and was able to have the battery in the camera charged... Sorry John...couldn't help myself..!  Only have a relatively small amount of fuel going through the spray ring causing it to run a little on the lean side during A/B due to it having 0.020" "Stainless Lockwire" in the holes, I'll remove every second wire and see how it goes then. All in all not a bad result. I'll also need to open up the "supplementary flame show" fuel supply a bit more...I guess it's better to be able to open up an orifice rather than have to make them smaller.. Still have some fine tuning and adjusting to go but it's all heading in the right direction. As usual, the "Beast" starts and runs up to idle nicely now....I've got the start procedure down nicely now and is fairly quick for a "blower start". Still have the max P2 set at ~35 psi so have plenty of room to play with. Idle rpm is ~23k and could probably come down a fair way to help give a nice fluffy flame, self sustain appears to be fairly low, (thanks to John's nice efficient combustion chamber), @ ~15500rpm, max rpm still an unknown at the moment due to the rpm sensor no being happy in direct sunlight....but for starting duties and up to idle it's very useful....thankyou for that idea Anders. A few numbers: A/B Pipe exit diameter: 106mm, Idle EGT: 525c, full noise EGT: 605c, Full noise with A/B EGT: 660, oil pressure cold: 65-70psi, oil pressure hot: 52psi. P2 @ idle 4.5psi, P2 @ max rpm 34.5psi... www.youtube.com/watch?v=hdr_FX3dGF4&feature=youtu.beCheers, Smithy. |
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Post by smithy1 on Feb 11, 2015 0:47:41 GMT -5
Hey Andrew, C'mon then... don't keep us in suspense....details man..!! It's a Garrett T18A40 91mm in, 127mm ex compressor, and 106mm turbine exducer (should be 129mm turb wheel but I haven't convinced the housing to come off yet) It came with all the v band clamps, etc which is nice Ooh...that's a nice size comp inducer ~3.6 inches. Should make for a pretty healthy turbine....I'm guessing ~130lbs static thrust would be a nice result from that. Look forward to seeing it run in the not too distant future. You should start a new thread for it when you get started. Cheers, Smithy. |
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Post by smithy1 on Feb 11, 2015 0:57:13 GMT -5
Hi All, Finally... after several weeks of me faffing around, I've fitted the new A/B pipe and plumbing to the "Beast", unfortunately I have yet to run it , was hoping to give it a test run during the car show I was at yesterday, but it just wasn't safe to do so, too many little children running around, better safe than sorry I suspect: Still need to fabricate a rear support for the pipe, not real happy with all the weight hanging off the turbine housing....I'll get there eventually.. There are three fuel feeds to the pipe, one is the main A/B spray ring, which can be seen underneath, the other two are supplementary feeds on either side via a 1mm nozzle in each for "flame show" requirements, these can be enabled/disabled via a separate flow control as required. There's also a RR250-C20B ignitor placed just downstream of the flame holder and in the divergent cone, essentially it's a backup ignition source which can also be enabled/disabled by a separate switch...this is to augment the ignition provided by the hot streak, which can be seen entering the outer combustion housing in the first pic. Probably a bit of overkill but....just can't help myself.. Cheers, Smithy. Hi Brett, Nice work on the A/B pipe Cheers, Mark. Thankyou Sir....muchly appreciated. Cheers, Smithy. |
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Post by enginewhisperer on Feb 11, 2015 0:59:30 GMT -5
New afterburner looks good!
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Post by smithy1 on Feb 11, 2015 1:09:52 GMT -5
New afterburner looks good! Hi Andrew....yeah the pipe is certainly close to what the engine requires....seems to work nicely now...just a bit of fine tuning should see it sorted. Cheers, Smithy. |
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, was hoping to give it a test run during the car show I was at yesterday, but it just wasn't safe to do so, too many little children running around, better safe than sorry I suspect: