userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 3, 2020 8:10:43 GMT -5
Hi Scott thanks for the info, I think I'm gonna do a rectangular profile elbow and figure out the potential issue of the rounded flange vs 90° elbow corner when I get to it. Did you do any mods to the nozzle as I'm now getting a delevan 6 gph 80° hollow cone as when I spoke to a dealer of the fluidics one they said it isn't suitable for kerosene which obviously isn't the case with that beautiful beast! Hi! Don't be afraid to work with the 4" round. I can't imagine the gas flow in a square section being particularly laminar? It's a nights work to make the round to square but worth it. I'll dig out more pics. Can't see any issues with the fluidics? It flowed like a trooper last night...! Cheers Scott
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Post by wannabebuilderuk on Oct 3, 2020 8:36:39 GMT -5
Yea would do round however from what I've seen (rcdon gr-7 engine etc) that it'll work and I've already ordered the c/c end tank already with the 88*58 5mm radius cutout so I'll be shaping the f/t from the 6" to the rectangle by squashing the slip joint section of the funnel or by putting the slip joint section over the funnel and cutting the excess off the funnel before welding in place.
Good that the nozzle works, you kept both sintered filters on? I'll be keeping them in mind if I need another one in the future, will try this delevan 6 gph 80° hollow cone one (£11 total with postage) at the 600 psi I'm planning and see how it goes.
Might have to come see your beast after covid is all done ha (near Glasgow)
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 3, 2020 9:05:41 GMT -5
Yep the sintered filters are on for now. I would say this nozzle is actually too big all things considered but I can control it with my needle valve nicely, but last thing I want to do is increase flow through it!
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Post by wannabebuilderuk on Oct 3, 2020 9:19:09 GMT -5
If only lockdown was still in effect, take the beast onto the longest cross country train line that's not running due to minimal travelers and go full throttle ha
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 3, 2020 9:58:16 GMT -5
Ahhh it's only 600 mm wide, and normal tracks are 1435 mm wide! Admittedly it's nearly 3 meters long though!
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Post by wannabebuilderuk on Oct 3, 2020 10:33:20 GMT -5
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slittlewing
Senior Member
Joined: November 2017
Posts: 458
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Post by slittlewing on Oct 3, 2020 10:54:36 GMT -5
Well done on getting it going at full power! Richards AB design is working wonders for us all I was meaning to reply to your previous post regarding end cap glowing - I think this is normal on all combustors with flat end caps. The lack of air jacket on that surface combined with the radiant heat from flame inside FT makes mine glow, and I saw the same with another one on this forum too. What TOT did you get upto at 2.5bar? When is the rolling test! Cheers Scott
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Post by racket on Oct 3, 2020 17:59:37 GMT -5
Hi Scott
Whats that long stainless tube in your flametube ??
It won't survive the flames and could end up going through the turbine wheel
Cheers John
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Post by wannabebuilderuk on Oct 4, 2020 5:46:29 GMT -5
John it's the propane delivery nozzle I think from what it says below the picture.
Ben
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 8, 2020 12:08:53 GMT -5
Hi Scott Whats that long stainless tube in your flametube ?? It won't survive the flames and could end up going through the turbine wheel Cheers John It’s the propane delivery nozzle. Is it really likely to be damaged? It’s the first time the propane system has worked... damn.
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Post by racket on Oct 8, 2020 15:24:26 GMT -5
Yes , it won't survive the primary zone temperatures which are well in excess of the melting temp of stainless , vapouriser tubes survive because they have air and fuel continually cooling them internally, but once you switch off the propane your delivery tube will suffer .
Better to have some sort of small bore tubing external to the flametube and delivering the propane to a hole near the spark plug
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Oct 19, 2020 17:45:37 GMT -5
Yes , it won't survive the primary zone temperatures which are well in excess of the melting temp of stainless , vapouriser tubes survive because they have air and fuel continually cooling them internally, but once you switch off the propane your delivery tube will suffer . Better to have some sort of small bore tubing external to the flametube and delivering the propane to a hole near the spark plug Thanks for this John, I'll have another look at it ASAP and see if it can't be improved. I'll see if it starts without the tube... I uploaded a short video of it running to Youtube BTW:
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Post by wannabebuilderuk on Oct 19, 2020 17:50:19 GMT -5
God I can't wait to see that beast on a track..
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Post by racket on Oct 19, 2020 18:57:21 GMT -5
Afterburner making all the right sort of noises :-)
You should be very happy with that
Cheers John
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userscott
Junior Member
Joined: March 2019
Posts: 96
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Post by userscott on Feb 10, 2021 19:01:38 GMT -5
Hi team! Just a quick post to say I'm still lurking, and the beast is still sat in warm storage awaiting the end of restrictions from the pandemic.... Thank for the positive comments, and I'm sure soon enough we will see her stretch her legs! Keep safe all and happy RPMs!
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