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Post by racket on Mar 18, 2015 16:39:40 GMT -5
Hi Guys
Finally got my 0.5" dia evaporator tubing for the engine , Alloy 800 X 0.5mm wall thickness , time to make the tooling to do the "D'ing" along their lengths .
The company I previously sourced it from was "swallowed" by a large multi national , so some difficulty with sorting out where things eventually went , the tubing is now in another State some 500 miles-800 kilometres away from where they were, also the 800 alloy tubing is in short supply here in Oz at the moment ............but alls well , they cobbled together enough bits from off cuts for 2 engines :-)
Cheers
John
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Post by pitciblackscotland on Mar 19, 2015 1:26:24 GMT -5
Good one John  Are you going to use a scavenge oil pump for your engines  Been looking at the photo that Vanessa put up and the comp housing doesn't seam to have the oil outlet port like the 10/98 engine has Cheers, Mark.  |
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Post by racket on Mar 19, 2015 1:54:16 GMT -5
Hi Mark
Everything is going to go in and out through that "pad" on the front cover , the "radial" lube passageways were "complicated"
Cheers
John
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Post by racket on Mar 23, 2015 2:04:35 GMT -5
Spent a couple of days in the shed cutting out the stainless steel rings for the front and back walls of the combustor , 2mm thick SS sheet 300 X 300 mm fixed to the faceplate in the lathe and a slow rpm turning job to cut/machine them out at 279mm OD with a 119mm ID for front wall, and 166.5mm ID for the rear wall
Tomorrow I'll clamp them to the die to turn over the corner , lotsa oxy and a big hammer should get them formed .
Then drill the 12 X 0.5" holes for the evaporators , things are happening at last :-)
Cheers
John
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Post by pitciblackscotland on Mar 23, 2015 4:32:32 GMT -5
Hi John, Good to hear you are back in the shed again working on this engine project. Cheers, Mark. |
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Post by racket on Mar 23, 2015 4:51:20 GMT -5
Hi Mark
Yeh , good to have grease under my nails and the smell of cutting fluid in my nostrils :-)
I'm being rather lazy and not doing many drawings , tending to roughly follow the same design as the 10/98, but with some "organic" changes here and there as I go along , ..........if it looks right, I'll use it ;-)
Cheers
John
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Post by Johansson on Mar 23, 2015 5:36:54 GMT -5
That´s the spirit, who needs drawings? |
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Post by pitciblackscotland on Mar 23, 2015 5:45:15 GMT -5
Hi John, LOL you not doing it redneck style are you? ?? Will the flame tube be the same size as the 10/98? Cheers, Mark. |
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rythmnbls
Veteran Member
Joined: August 2011
Posts: 145
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Post by rythmnbls on Mar 23, 2015 9:20:53 GMT -5
I draw the parts after they are made, then they are dimensionally perfect Regards, Steve. |
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Post by smithy1 on Mar 23, 2015 14:49:51 GMT -5
Drawings... What are they..? I did see one once..!! Smithy. |
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Post by racket on Mar 23, 2015 15:53:02 GMT -5
Hi Mark
The flametube will be a bit over an inch bigger in diameter, with a slightly bigger "bore", but will still have a big enough cross sectional area , I wanted to have a more generous flow area around the outside of the flametube hence the move to a 12 inch casing when an 11 incher would have probably have sufficed .
Yeh guys
LOL........drawings take longer to produce than the article most times , a bit of a waste of time for a "one off"
Cheers
John
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Post by racket on Mar 26, 2015 4:13:16 GMT -5
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Post by Johansson on Mar 26, 2015 4:18:24 GMT -5
Hi John, Pics or it didn´t happen. You are welcome, I bought one as well for evaluation. If it seems to work and I can find a suitable micro pump for it I will design the JU-02 engine for kero start. Cheers! /Anders |
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Deleted
Joined: January 1970
Posts: 0
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Post by Deleted on Mar 26, 2015 11:28:49 GMT -5
Has anyone considered one of the small pumps as used in domestic coffee machines, they give a modest flow at 4-5bar
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Post by racket on Mar 26, 2015 16:14:05 GMT -5
Hi Anders LOL........you're a hard taskmaster  A few pics    Cheers John |
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Are you going to use a scavenge oil pump for your engines 
Been looking at the photo that Vanessa put up and the comp housing doesn't seam to have the oil outlet port like the 10/98 engine has 
