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Post by enginewhisperer on Jan 29, 2020 16:44:41 GMT -5
Ever had one of those days when nothing goes right.............. I've had the last month or so going like that! I do have a pretty good bolt shop near work and a bunch of fasteners "in stock" so email me any time if you're having trouble finding something and I'll post it if I have it  |
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Post by racket on Feb 5, 2020 4:48:50 GMT -5
Hi Guys The gearbox mounting spacer piece has been made and welded to the frame . Mounting surface machined true to the frame , time to start bolting things on .   Cheers John |
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Post by racket on Feb 6, 2020 0:03:10 GMT -5
Hi Guys Things are moving quickly for a change Gearbox mounted and locked down after alignment of sprocket to frame checked and adjusted using the 4 adjustment screws at front and back of gearbox. Gas producer swung into position via the "sky hook" and cardboard templates made of the required mounts , a couple of wooden brackets made and fitted to check alignment with 6mm thick brackets in place , all OK, so a couple of plate steel ones made up and clamped in position , everything checked once more and found acceptable , theres some flex in the original stainless mounts which seem to "accommodate" any slight misalignment and will hopefully also cope with different vertical alignments between gas producer and freepower scroll when the heat comes on, ~10mm of axial slipjoint available at the interstage duct . I'll leave welding untill tomorrow morning when I'm feeling a little fresher , its been a long day, but a productive one . A few pics .............    Cheers John |
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Post by Johansson on Feb 6, 2020 0:08:55 GMT -5
Imagine this engine in a lightweight kit car chassis, it would be a beast! Nice work as always John, you are raising the standard for us all with your builds. Cheers! /Anders |
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Post by racket on Feb 6, 2020 2:41:01 GMT -5
Hi Anders
Yep , something lightweight required.
The rails of the frame are spaced apart at early Honda Goldwing distances , once things are painted and finished I'll have a "think" ;-)
Theres plenty of room under the engine for the oil tank .
Cheers
John
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Post by pitciblackscotland on Feb 6, 2020 4:32:31 GMT -5
Hi John, I like that base for the gearbox, looks like a nice thick steel plate you use. Also were did you get that sprocket gear from ?? Cheers, Mark. |
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Post by racket on Feb 6, 2020 15:43:04 GMT -5
Hi Mark
Yep , a took some inspiration from your build and made it "heavy duty" , a 12mm plate sandwiched with a 20mm plate , it provides enough packing to provide ~3mm clearance for the exhaust pipe over the outside frame rail.
Sprocket from Blackwoods , I bored it then outsourced the keyway cut , most engineering suppliers should be able to supply the sprocket.
Cheers
John
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Post by pitciblackscotland on Feb 6, 2020 22:36:34 GMT -5
Hi John,
hehehe good one that should hold the gearbox in it's place especially with all that power from the fat boy engine. OK thanks for that will go to my local engineering supplies and see what they have.
Cheers,
Mark.
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Post by racket on Feb 16, 2020 22:34:34 GMT -5
Hi Guys Work progressing on the oil tank that will sit under and between gas producer and freepower , various baffles inside to make sure the oil flow to the suction outlet is "controlled" , deairator plate ~20 mm below top lid of tank , I'll have to find something suitable to make the cap and filler pipe out of before welding on the lid , I'll try and have a tangential return mounted onto the filler pipe to promote some deairation , oil capacity ~7.5 litres .    Cheers John |
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Post by racket on Feb 23, 2020 23:56:10 GMT -5
Hi Guys Its been a bit quiet here on the Forum so thought I'd better make a contribution The oiltank construction came to a halt whilst waiting for the scavenge pump to arrive , it finally did and I have it mounted up and will now know where the plumbing will go back to the tank so that I can now make the appropriate fittings . Hopefully the pump has sufficient capacity .    Cheers John |
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Post by turboron on Feb 24, 2020 7:48:04 GMT -5
John, what are the details and specs on the pump? Manufacturer, type, etc.
Thanks, Ron
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htevo80
Member
Joined: November 2018
Posts: 36
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Post by htevo80 on Feb 24, 2020 9:57:41 GMT -5
Hi John I was curious on your thoughts of whether the oil drain needs a vent or you can run it straight to the scavenge pump and have a slight vacuum on the drain.
-Gavin
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Post by racket on Feb 24, 2020 18:56:57 GMT -5
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Post by racket on Feb 24, 2020 19:01:50 GMT -5
Hi Gavin
There'll be a "bypass" around the pump to prevent pressure buildup upstream if the pump is under performing , a Tee piece at the pump inlet with a lightly loaded "valve" that allows "blowoff" back to tank if theres too much "air" in the scav oil , after shutdown the oil will come out with less air and the pump should cope and "vacuum "out the cool down oil flow.
Cheers
John
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htevo80
Member
Joined: November 2018
Posts: 36
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Post by htevo80 on Feb 24, 2020 20:14:16 GMT -5
I have the same pump and I was wondering if vacuum on rournal bearing would cause issues I run the drain straight to the pump and have had no issues yet hopeing the pump won't seize lol. The bypass valve is a good addition
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