Lister Diesel Engine

[EnnechParticipant @ennech]

Thanks Neil,

Eric

[EnnechParticipant @ennech]

Piston Core Box with 3D printed insert

[EnnechParticipant @ennech]

Machining the Cylinder Block pattern

[EnnechParticipant @ennech]

Piston casting

[EnnechParticipant @ennech]

Cylinder casting

[JasonBModerator @jasonb]

Looking good. One thing I would consider is adding a chucking spigot to the cylinder, the majoriry of IC engines that I have made have one and it makes holding the piston a lot easier such as this and this

 

Edited By JasonB on 02/08/2013 20:33:18

[EnnechParticipant @ennech]

Easy enough to hold on a stub mandrel

[Sub MandrelParticipant @submandrel]

> Easy enough to hold on a stub mandrel

OY! Gerroff!

Neil

[EnnechParticipant @ennech]

hhhhhhhhhhhhhh

[HobbyNutParticipant @hobbynut]

I am impressed. Makes my fabricated effort look "amateurish".Do you intend on selling these pieces? I would be interested in a piston casting.

[EnnechParticipant @ennech]

Your fabricated crankcase looks great to me HobyNut, I am impressed!

I have just modified the piston pattern to include a boss, not really for chucking but to cater for the centre drill. I think it is important to work from the inner bore of the piston as there is inevitably going to be eccentricity between the piston and the core. There for it would be better to hold the piston OD in a 4 jaw and machine the inner diameter of the piston skirt and then make a stub mandrel milled out to clear the bosses and use this for subsequent turning operations and drilling the gudgeon pin hole. This method is described in the little book "Making Pistons" by Stephen Chastain

Edited By JasonB on 03/08/2013 20:10:32

[JasonBModerator @jasonb]

Ennech, with a chucking spigot you can machine everything at one setting.

Hold the outside of the piston and clean up spigot, turn it the other way around so now holding by the spigot in the 4 jaw to get the inner cast face true, bore skirt and turn OD & rings then leave it in the chuck and transfer to the rotary table to clean up the inner faces of the gudgeon pin area, stand rotary table on edge and drill gudgeon pin holes.

You can then either carefully hold the outside to finish the head end opf the piston or use a drilled and tapped arbor and bar through the gudgeon pin.

Thats my prefered way but there are other methods as well, use whatever suits best.

[EnnechParticipant @ennech]

Hi HobbyNut, I sent you a pm

[EnnechParticipant @ennech]

I now have the full set of castings. Crankcase, Flywheels, Cylinder Block, Bearing housings and Governor Housing

[Martin CottrellParticipant @martincottrell21329]

Hi Ennech,

Will these castings be available to buy or are they just for your own use?

Regards, Martin.

[EnnechParticipant @ennech]

I have sent you a pm Martin

[EnnechParticipant @ennech]

Whoops! I forgot to include the new piston casting

[EnnechParticipant @ennech]

In view of the various discussions that have taken place in this forum concerning the drawings I have produced some large scale working drawings of the model. I have taken onboard some of the suggestions made here and incorporated a few of my own.

[Jeff DaymanParticipant @jeffdayman43397]

I appreciate the thought Ennech, and would like to have a good look at the drawings.

However if I zoom in on them sufficiently to see them, the dimensions and lines are so blurry I can't see them. Could you please repost them one to a sheet, so to speak, so they can be read?

JD

[HobbyNutParticipant @hobbynut]

Those drawings look good. I would like to check them with some I have done also. Looking forward to going further with this with you.

[EnnechParticipant @ennech]

I have no doubt that you will have good chance to check the drawings Hobbynut

Eric

[EnnechParticipant @ennech]

The drawings are on large sheets Jeff. A1 and A2 so when these are converted to jpg format which is the only format acceptable here they tend to be a bit blurred.

[EnnechParticipant @ennech]

Got a bit further with the drawings, The head details await further developments

[EnnechParticipant @ennech]

I have finally got satisfactory cover plate. This was made by the lost wax casting process off a 3D printed pattern made from my 3D CAD model. It is in brass and weighs 70 grams. I am very pleased with the detail achieved.

[JasonBModerator @jasonb]

That looks very crisp and an ideal use for the printer, can't tell what metal from the photo – Gunmetal?

J

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