Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Feb 9, 2020 17:04:56 GMT -5
|
|
|
|
Post by racket on Feb 9, 2020 22:42:19 GMT -5
Nope , that pumps too large a flow , also not made for high pressures , an auto EFI pmp would be better .
|
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Feb 10, 2020 17:31:10 GMT -5
Nope , that pumps too large a flow , also not made for high pressures , an auto EFI pmp would be better . Thanks John, So a 100 psi Bosch 044 or similar should do the trick then? |
|
|
|
Post by racket on Feb 10, 2020 18:14:24 GMT -5
Yep an EFI pump should work , the 044 has a fairly large flow , probably twice what you need , maybe look around for one with less flow but higher pressure rating
|
|
|
|
Post by slittlewing on Feb 12, 2020 12:12:58 GMT -5
Hi Colin, Standard 044 (or Sytec is cheaper) can do 150psi/10 bar. Seems ideal for oil burner nozzles. On my one and only kerosene run, my engine idled with 2bar fuel pressure.
Cheers
Scott
|
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Feb 15, 2020 13:55:34 GMT -5
I have been given a pump by somebody who built a small gas turbine when younger. It runs fine and is a prelube unit for engines but unsure of sizing etc yet. It has quite large motor so will need to clamp it when running to see what current it draws. I will rig up an oil tank, return line and pressure gauge to see what it delivers but being prelube unit I'm assuming the figures should be somewhere close for oil supply to turbo. Im thinking it may not be continuous rated though as motor seems to heat 2.5mm wires up pretty quick so more like started motor I reckon   |
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Feb 16, 2020 7:51:11 GMT -5
Afternoon All, Well I made the square to round adapter today for entry into turbine flange. I say made, I actually hammered it out from a cone. Can anyone help with a couple things please? 1) How snug does the slip joint need to be or would dropping into the cone like in picture here work? I'm assuming not as no room for expansion but then expansion is low in axial direction from John's comments. 2) My flame tube looks too long now as the cone has added another 120mm overall. The ratio dent look right. Should I trim the flame tube to just below tertiary holes to allow for extra length on cone? Looking close to making combustion tube now and getting some ignition going on (I love fire).    |
|
|
|
Post by turboron on Feb 16, 2020 13:12:02 GMT -5
Colin, looks good to me. John always calls for a "rattily" fit. It needs to be loose so that it does not bind when the temperature comes on and it is growing axially and radially.
Thanks, Ron
|
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Feb 16, 2020 13:30:52 GMT -5
Colin, looks good to me. John always calls for a "rattily" fit. It needs to be loose so that it does not bind when the temperature comes on and it is growing axially and radially. Thanks, Ron Thanks Ron, it is a rattle fit but being into a cone it's fairly trapped but then cone and tube are same thickness so should expand similar rates. I could easily add a vertical ring to end of cone if that will help. Good to get some progress on the build anyway  |
|
|
|
Post by racket on Feb 16, 2020 15:30:52 GMT -5
Hi Colin
There can be several millimetres of axial expansion of the flametube so might pay to weld a short ring onto your cone for a rattly slipjoint, we don't need to be too pedantic about perfect fits, initially the inner wall will expand radially by a considerable amount more than the outer wall of the slip joint .
Cheers
John
|
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Mar 21, 2020 12:12:38 GMT -5
Hi Colin There can be several millimetres of axial expansion of the flametube so might pay to weld a short ring onto your cone for a rattly slipjoint, we don't need to be too pedantic about perfect fits, initially the inner wall will expand radially by a considerable amount more than the outer wall of the slip joint . Cheers John Sorry for the slow reply John! Been hectic with work and now trying to stay busy with this new challenge from the Virus. Hope all is well in the land of oz |
|
|
|
Post by racket on Mar 21, 2020 17:44:49 GMT -5
Hi Colin
Oz is sorta rising to the challenge of the Virus , thankfully we have a very good public health system , but being in the "at risk" age group , my better half and I are self isolating as there have been Covid cases in the district , school kids brought it back from a sports excursion to Sydney :-(
On the plus side I can alway go fishing out on the breakwall , with plenty of fresh sea air and a 50 metre seperation to the next fisher :-) , the fishing has been extremely good after all the recent rains forced the fish back down the estuary, we'd had a couple of lean years with the drought .
We get good international news and it sounds like Boris is trying to get things under control in the UK, but I fear its going to be an expensive exercise for the world , locally our Federal Govt is going to spend ~10% of GDP to keep businesses alive and an income stream for the general population , Oz has had 30 years of continuous growth without a recession , the good times have just rolled on , even the GFC didn't cause us much pain , but its going to be difficult this time , anyone under 40 is in for a rude "real world" shock , us oldies can just sit back with the popcorn and watch the show, hoping all the while no one gives us a dose of the virus.
Cheers
John
|
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Nov 8, 2020 6:08:36 GMT -5
Hi Colin Oz is sorta rising to the challenge of the Virus , thankfully we have a very good public health system , but being in the "at risk" age group , my better half and I are self isolating as there have been Covid cases in the district , school kids brought it back from a sports excursion to Sydney :-( On the plus side I can alway go fishing out on the breakwall , with plenty of fresh sea air and a 50 metre seperation to the next fisher :-) , the fishing has been extremely good after all the recent rains forced the fish back down the estuary, we'd had a couple of lean years with the drought . We get good international news and it sounds like Boris is trying to get things under control in the UK, but I fear its going to be an expensive exercise for the world , locally our Federal Govt is going to spend ~10% of GDP to keep businesses alive and an income stream for the general population , Oz has had 30 years of continuous growth without a recession , the good times have just rolled on , even the GFC didn't cause us much pain , but its going to be difficult this time , anyone under 40 is in for a rude "real world" shock , us oldies can just sit back with the popcorn and watch the show, hoping all the while no one gives us a dose of the virus. Cheers John Hi John, Apologies for the very late reply. with all the madness everything else has taken a back seat but a chat with Andy Morris has me excited to get back on with it Hope all is well over there and you're keeping healthy. |
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Nov 8, 2020 6:22:24 GMT -5
Well I finally got 5 minutes to get back on with the build. I have now bored the 6" clamp ferrule blank and welded the 1.5" to it. The pictures show how the flame tube will be removable from the combustion chamber and thesis also repeated at the bottom flange end so combustion chamber can be tweaked if needed also. The fuel line will be welded into the small 1.5" blank ferrule and then into a threaded boss to take fuel nozzle. Still deciding if I should put a propane ignition system in place or ignite Kerosene with something like this but scaled down obviously     |
|
Colin Heath
Junior Member
Joined: January 2020
Posts: 77
|
Post by Colin Heath on Dec 30, 2020 15:46:39 GMT -5
Evening All, Got a little time over Christmas break to progress the build. Combustion chamber now completed. Dairy clamp fittings to enable chamber to be removed. Next step is to install fuel nozzle but today noticed it's a 9/16" x 24 TPI fine thread rather than BSP so will need to machine an adapter socket which will then receive the 12x8mm seamless stainless tube. This tube will then pass through he 1" clamp fitting blank on top of chamber. I also need to machine a boss to mount the surface discharge ignition plug that Andy Morris kindly sent me along with parts to make bang box. I have Bosch EFI fuel pump so will be able to hook up and test fire chamber soon.    |
|
