Lister Diesel, missing drawing ?

You can if you tell us what it is?

Thats a nice rendering in your albums, I take it you have a bit more info that we do as you have included the feet which as yet have not beed detailed in the mag.

I should add that the second installment contained the info that was not in the first issue though the 3mm hole/M3 tapped hole still remains unresolved

J

Edited By JasonB on 08/02/2013 13:10:02

I don;t have any more information than you. As for the feet I did a bit of guesswork based on a bit of scaling and the assumption that you original engine would have been made to imperial dimensions. Scaling indicates 3inches by 3 inches as the hole centres equivalent to 18inces by 18 inches on the full scale item.

Ah found your thread now, its here for anyone else looking.

I see that in issue 4449 additional bits have been added to the casting! It's a good thing that I did not machine the patterns last week! I attach my updated designs. from the section it will be seen that I have tapered the walls of the oil drain box slightly to improve the core strength.

I would not cut anything until at least 4450 has been published, at least that way we will know that all teh crankcase drawings have been provided.

Looking forward to seeing teh pattern being made.

J

Wise words Jason , thanks

I have just been contacted by George and the hole in the top of the crankcase should be tapped M3 or whatever similar size tap you have to hand such as 5BA, 5-40unc.

He also mentioned that the engine can be seen running on youtube which is worth watching as he gives a good descriprion of all the parts of the model.

**LINK**

J

Just watched the video,

what a lovely engine thanks for posting the link Jason

Stew

Thanks Jason,

A video is worth a thousand ME drawings

Eric

Just a little interpolation

The problem is that the Illustrations in ME should not be trusted as they are not always in proportion so what may look one size on the drawing could actually be something quite different. They tend to be drawn to suit page layout, column widths etc. This is definately a case of "don not scale from drawing"

There are also some nasty metric conversions or rounding up by the drawing package going on as who would make things 6.4mm dia. Those with experiance will no doubt opt for 1/4" but others may get caught out.

Give it another 24hrs to see if George replies, if not I'll PM him for the missing dimensions

At the end of the day, does it really matter? As long as the component looks like the original, is functionally satisfactory and structurally sound. I am sure George did a bit of interpretation to arrive at his model design.

Probably not but when the piston strikes the valves because you guessed the height 0.5mm too small it will matter.

Like I said earlier I would not cut metal until we have all the details and then you can assemble it all in Alibre and make sure things rotate freely

I concur Jason. I will wait.

Just an update, I have heard back from George and once one query is confirmed I will post the list of items.

J

Some revisions here