sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 7, 2021 18:20:02 GMT -5
Copper lines are in, at least for the oil pressure and gas lines. The other oil lines are all suction lines - will upgrade these to high temp rated hoses at some point. Oil changed to 5w-40 as suggested by John. Will give her a test run today. Pic below link to Dropbox. Suggestions welcome and appreciated 😀 www.dropbox.com/s/l1mu2nxij0f8tt6/2021-08-05%2019.03.10.jpg?dl=0
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Post by racket on Aug 7, 2021 21:40:13 GMT -5
There'll be a lot of radiant heat from the transition piece between combustor and scroll, you may need to protect your pump .
All the best with the spoolup :-)
Cheers John
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sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 13, 2021 3:04:47 GMT -5
Bah cannot seem to get her to start now....
The only material change I have made is to use more viscous oil - changed from 0W-20 to 5W-40. Would that tend to slow the rotor during start? Perhaps weather is also a bit colder now than last time.
Otherwise doing exactly what I did before - blowing air in using a mains-powered leaf blower, then slowly open the LPG valve until she lights.
It does not seem that the LPG is igniting - save for one very loud pop out the back. Have checked and the spark plug is firing.
Any tips? Thank you. Steve.
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Post by wannabebuilderuk on Aug 13, 2021 4:03:41 GMT -5
The thicker oil would make it harder to spin up so the option is either you briefly lower the oil pressure to make it easier or you use a more powerful blower to spin it or even use a high speed power tool that couples to the compressor nut.
As for lighting issues the blower is possibly blowing the gas away from the spark so best to make sure it is lit before giving it a massive amount of air.
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Post by racket on Aug 13, 2021 17:07:18 GMT -5
Hi Steve
Try warming the oil , there are mains voltage heating pads that simply stick to the oil tank , thats what I use , as well you can use a hairdryer blowing through the engine to warm the internals .
But you need to get ignition before applying the blower , so oil on and pressure registering , spark on , LPG on and listen for the "pop" of it igniting then immediately apply the blower and increase fuel flow .
Cheers John
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sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 13, 2021 21:09:17 GMT -5
Hi John and wannabe,
You guys are the best. I was doing it wrong by adding air before fuel! Sorted now….. add air last! Boom.
What a great forum. Thanks guys.
Steve.
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Post by racket on Aug 13, 2021 21:20:12 GMT -5
Hi Steve
No worries , have fun :-)
Cheers John
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sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 14, 2021 1:28:30 GMT -5
Hey do you reckon this turbine wheel looks OK? Looked a bit rainbow-ish to me and wondered if I haven't overcooked it. I usually have a mirror and watch carefully to make sure it's not glowing, but today I didn't have the mirror.... Thanks again. Steve. www.dropbox.com/s/vxcyep75njorw3n/IMG_9104.jpg?dl=0
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Post by racket on Aug 14, 2021 1:30:15 GMT -5
Hi Steve
Looks OK to me :-)
Cheers John
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sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 14, 2021 3:46:35 GMT -5
Thanks again John Steve.
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sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 16, 2021 23:44:13 GMT -5
Hi again John. Hey just thinking about a V2.0 with lots of improvements. Purely for aesthetic purposes, it would be nice to have the turbo and the combustion chamber axially aligned (turbo sitting above combustion chamber, just behind it). This would need a large 90 degree elbow from the burner tube outlet to the turbine scroll inlet. But this is a no-no, right? Too much air friction loss in the elbow? I'm happy to give up a little performance to make it look cool - this is for show only - don't need every ounce of thrust. Thoughts? Many thanks. Steve.
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Post by racket on Aug 17, 2021 0:15:38 GMT -5
Hi Steve
It can be done , just don't make it too tight a radius on the bend
Cheers John
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Post by wannabebuilderuk on Aug 17, 2021 2:16:41 GMT -5
Hi again John. Hey just thinking about a V2.0 with lots of improvements. Purely for aesthetic purposes, it would be nice to have the turbo and the combustion chamber axially aligned (turbo sitting above combustion chamber, just behind it). This would need a large 90 degree elbow from the burner tube outlet to the turbine scroll inlet. But this is a no-no, right? Too much air friction loss in the elbow? I'm happy to give up a little performance to make it look cool - this is for show only - don't need every ounce of thrust. Thoughts? Many thanks. Steve. See halfway down my build thread, I am doing this to make it more compact. jetandturbineowners.proboards.com/thread/1398/build-thread-finally-garrett-tv8101?page=6Ben
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sydneyoz
Member
Joined: June 2021
Posts: 18
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Post by sydneyoz on Aug 17, 2021 2:42:54 GMT -5
Thanks Ben and John. Got it.
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Post by turbojet atv on Aug 17, 2021 3:34:14 GMT -5
Hey Steve, i did a 90° bend on my engines. They look stylish with the turbos hanging off the side if the engine. Of course there’s nothing wrong with it sitting on the end of the engine. It’s what style or packaging you like. -Cullen
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