Single cylinder semi diesel
Swarf Maker | 08/01/2022 10:28:57 |
132 forum posts 7 photos | I have no idea how much of an issue it might be in this situation Fred, but you appear to have used reconstituted cork rather than 'real' cork. The 'glue and granules' format of that friction surface may just fall apart in use. |
Four stroke Fred | 08/01/2022 11:22:38 |
![]() 322 forum posts 305 photos | Good Day Swarf Maker, This is an area that I may have to experiment with and may need to try different friction materials. I do have other sheets of cork but they are as you said granulated as that is what was available. Have you any suggestions what I could use as an alternative ? The sheet only needs to be approximately 2.0 thick. |
Swarf Maker | 08/01/2022 12:38:17 |
132 forum posts 7 photos | Unfortunately real cork is getting difficult to obtain and is now rarely used for wine bottles. However, you may find that a home brewing shop will stock real cork stoppers and your solution would be to slice those into suitable segments, glue them in place and sand to an even thickness. They will certainly provide a longer service life and, provided that you use a suitable adhesive, they will be immune to oil contamination. Cork is used this way in full scale motorcycle clutches with oil baths! |
Four stroke Fred | 12/01/2022 10:04:18 |
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Fred.
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Four stroke Fred | 12/01/2022 10:06:28 |
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Four stroke Fred | 22/01/2022 07:55:14 |
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Four stroke Fred | 27/01/2022 05:42:13 |
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Fred. |
Four stroke Fred | 31/01/2022 01:35:00 |
![]() 322 forum posts 305 photos | These are the 26 parts that make up the subassemblies of the clutch ( excluding nuts and bolts) and are now ready for the final assembly. I still have to make and fit the brake arm lever that presses on the outside of the pulley, but before I begin that I have to make a part for my digital height gauge as yesterday I had a disaster when the cover for the Myford caused it to fall from the table and on landing on the floor it broke the clamp that holds the marker point. This part looked as though it was made from stainless steel and was duly clamped together ready for silver soldering but on heating it appears that it was made from a type of white metal and began to melt! Oh dear, I now have to make a new part from another metal. |
Four stroke Fred | 05/02/2022 04:10:18 |
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Fred. |
Dominic Bramley | 06/02/2022 20:15:37 |
60 forum posts 1 photos | Looks fantastic Fred! Still following. Still enjoying. Dom |
Dalboy | 07/02/2022 09:03:13 |
![]() 1009 forum posts 305 photos | I may not have posted anything on this build but I am certainly enjoying the journey that you are taking with this. Thank you for taking the time to post all of the photos |
Four stroke Fred | 07/02/2022 22:13:10 |
![]() 322 forum posts 305 photos | Thank you Dom and Derek for your comments and it’s good to know that this saga is being read and enjoyed. It has been going for quite some time and there is still some way to go. Yesterday was spent finalising the injector pump mechanism design and today I will prototype some of the parts on the 3D printer. The eccentric that drives the pump has a built in advance retard activated by bob weights.This changes the point of the injection and acts as the governor ( we hope) but some experimentation will be required in the initial set up. The whole of this unit sits behind the flywheel that has yet to be made. This part of the project is a challenge but that’s what makes life interesting! Fred. |
Four stroke Fred | 08/02/2022 00:25:16 |
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Roger B | 08/02/2022 06:56:03 |
![]() 244 forum posts 105 photos | Is there some separate form of stroke/volume control for the injection pump or do the weights also control the injection volume? |
Four stroke Fred | 08/02/2022 07:52:44 |
![]() 322 forum posts 305 photos | Good Day Roger, The bob weights throw out and cause the eccentric ( constant stroke) to rotate backwards and this alters the point of injection but not the volume as this is controlled by a forked lever that alters the length of the stroke of the piston. I will show a drawing of this set up when it has been developed. Fred. |
Four stroke Fred | 08/02/2022 21:49:31 |
![]() 322 forum posts 305 photos | Roger this diagram may help to explain how the system works. |
Roger B | 10/02/2022 07:42:24 |
![]() 244 forum posts 105 photos | Thank you for the diagram. I am still not sure that I fully understand. Hot bulb/semi diesels are generally not very sensitive to injection timing. The lever system in the bottom right appears to limit the return stroke of the pump which would control the injection quantity but would also affect the timing. I am more familiar with the Lanz system which has a similar looking governor but the weights rotate an eccentric sleeve inside the main eccentric that controls the pump stroke. Engine speed is controlled by a wedge between the eccentric rod and the injector plunger. |
Four stroke Fred | 10/02/2022 22:10:53 |
![]() 322 forum posts 305 photos | Thanks for the information Roger. The system shown for the Lanz may be the same as used on the Mc Donald but on the information I have does not show it clearly and I may need to revise the system on the model. The Mc Donald was based on some of the Lanz technology - more research and study required! Fortunately I have not started to make this part of the model as yesterday I made the flywheel. It is now reaching the interesting stage of the model Fred. |
Four stroke Fred | 11/02/2022 09:31:02 |
![]() 322 forum posts 305 photos | Roger you are correct. Today I used a magnifying glass to look closer at the drawing I have been using and can just about make out that the system on the Mc Donald is very similar to the Lanz in that the governor moves a secondary bearing inside the eccentric. Thanks for your help, much appreciated. Fred. |
Roger B | 11/02/2022 15:38:03 |
![]() 244 forum posts 105 photos | I'm glad to try and help. This is a Lanz governor showing the intermediate excentric and the two spring groups, one for idling and one for maximum speed.
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