Author Topic: 1909 Mercedes Aero Engine  (Read 2156 times)

Offline Old Bill

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1909 Mercedes Aero Engine
« on: November 26, 2018, 08:14:32 PM »
I can't quite believe it but it was November 2012 when I signed up having bought a set of castings for Heinz Kornmuller's Mercedes aero engine from The Engineer's Emporium. My intention was to finish off my Thornycroft lorry and then have a go at something smaller. Well, I have almost finished the lorry and have started on the engine! I have been taking some photos which I would like to share. The first is Heinz original engine so that you can see what I am on about.

« Last Edit: November 26, 2018, 08:42:39 PM by Old Bill »

Offline Jo

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Re: 1909 Mercedes Aero Engine
« Reply #1 on: November 26, 2018, 08:23:36 PM »
Hello Stranger,  ;)

 :headscratch: I am sure you just showed me your castings but they seem to have gone again. Have you been talking to Jason?

Jo
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Offline Old Bill

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Re: 1909 Mercedes Aero Engine
« Reply #2 on: November 26, 2018, 08:26:20 PM »
Hi Jo. None stranger!

I am struggling to drop photos in with captions at the moment. I will get it sussed shortly. Any advice please?

Steve

Offline Jo

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Re: 1909 Mercedes Aero Engine
« Reply #3 on: November 26, 2018, 08:28:22 PM »
The photos need to be hosted on a photo hosting site like photosuckit and the links dropped into the post between the text.

Jo
Usus est optimum magister

Offline Old Bill

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Re: 1909 Mercedes Aero Engine
« Reply #4 on: November 26, 2018, 08:31:16 PM »
Thanks! I will return!

Steve

Offline Jo

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Re: 1909 Mercedes Aero Engine
« Reply #5 on: November 26, 2018, 08:38:25 PM »
That's what they all say to me as they gather up their castings and run  :-\

Jo
Usus est optimum magister

Offline Old Bill

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Re: 1909 Mercedes Aero Engine
« Reply #6 on: November 26, 2018, 09:00:08 PM »
OK. Got it!

I decided to start with the crank case. Now, all of the castings for this engine are a devil to hold.



I dogged the top half to my Taiwanese mill and skimmed the ends to give myself a datum. I also ran a mill along the feet for another straight edge.



The a bit of messing with the height gauge to find the centres.



Then drill and bore for the con rods. Now, the drawings for this engine could be a bit clearer and show more of the detail. Fortunately, I was switched-on enough to think of the block hold-down studs and took the opportunity to centre for them and the push rod bushes by coordinate drilling. In other words, by counting the numbers on the dials. One day, I am going to invest in a DRO!



Then I turned it over and skimmed it to thickness using a pile of slips and a clock gauge to measure it.



Spot face and hold-down holes.



First component well on the way!



I must admit that I am enjoying this one. It is so nice to be able to lift everything and to be able to fit it onto the machine with space to spare! Sump next. Then I am going to be looking for some advice as to how to drill the crank and camshaft holes.

Watch this space!

Steve    :)

Online sco

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Re: 1909 Mercedes Aero Engine
« Reply #7 on: November 26, 2018, 09:10:29 PM »
Looks like some nice castings Bill and I can appreciate the challenge in holding them for machining.  Are the drawings in metric or imperial?

Simon.
Ars longa, vita brevis.

Offline Ye-Ole Steam Dude

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Re: 1909 Mercedes Aero Engine
« Reply #8 on: November 26, 2018, 09:34:48 PM »
Hello Bill,

Beautiful castings and some fine machining also, this will be a fun project to follow.

Have a great day,
Thomas

Offline Dave Otto

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Re: 1909 Mercedes Aero Engine
« Reply #9 on: November 26, 2018, 09:51:42 PM »
Cool engine and nice work on your part Steve.
I'm looking forward to following along with your project.

Dave

Offline Old Bill

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Re: 1909 Mercedes Aero Engine
« Reply #10 on: November 26, 2018, 09:53:23 PM »
Looks like some nice castings Bill and I can appreciate the challenge in holding them for machining.  Are the drawings in metric or imperial?

The castings are quite nice and haven't been over-fettled. I would much rather clean them up myself as foundries tend to be a bit brutal to say the least! The drawings are all metric. However, my workshop is imperial so my calculator is now sitting on the bench. I am making the engine in metric units to drawing but am using BA threads as they are what I have and am tooled up to handle.

Steve   :)

Online b.lindsey

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Re: 1909 Mercedes Aero Engine
« Reply #11 on: November 26, 2018, 10:31:35 PM »
Great start Steve. Following along as well.

Bill

Offline stevehuckss396

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Re: 1909 Mercedes Aero Engine
« Reply #12 on: November 27, 2018, 01:00:19 AM »
Good work. I'll be following along. I like the engine as far as how it looks. Great project.
Do not be like the cat who wanted a fish but was afraid to get his paws wet.

Offline Art K

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Re: 1909 Mercedes Aero Engine
« Reply #13 on: November 27, 2018, 04:23:10 AM »
Steve,
I must admit having a soft spot in my heart for aircraft engines. So I will be following along.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Jasonb

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Re: 1909 Mercedes Aero Engine
« Reply #14 on: November 27, 2018, 07:14:20 AM »
You are off to a good start and thanks for taking the trouble to host the photos externally so that you can post in the thread, it makes it so much easier and enjoyable to follow like that.