Author Topic: Mercedes-Benz W165 Grand Prix engine in 1:3 scale  (Read 55424 times)

Online Jo

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #180 on: August 15, 2017, 03:01:48 PM »
Unfortunately, I don't think Dr Jo will be able to make it this year.

:wallbang:  :'(  :disappointed:

You've never forgiven me for putting you title on your badge have you Dr Mike  :lolb:

Jo
Usus est optimum magister

Online Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #181 on: August 15, 2017, 03:05:00 PM »
Dr Jo,
Ha ha, We all have our guilty secrets. :LittleDevil:

Mike
« Last Edit: August 15, 2017, 03:54:59 PM by Vixen »
It is the journey that matters, not the destination

Online Jo

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #182 on: August 15, 2017, 04:11:28 PM »
Dr Jo,
Ha ha, We all have our guilty secrets. :LittleDevil:

Mike

I must be getting  :old: because I don't remember having any  :noidea:.

Jo

P.S. What's the point of having guilty secrets if you can't remember them  :-\
Usus est optimum magister

Online Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #183 on: August 15, 2017, 04:25:16 PM »
We don't get old  :old:        We just mature :wine1: like fine wine.

How are you feeling? Getting stronger by the day, I hope.

Mike
It is the journey that matters, not the destination

Online Jo

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #184 on: August 15, 2017, 04:29:18 PM »
How are you feeling? Getting stronger by the day, I hope.

Mike

My tummy is feeling a bit sore from being shaken up in someone's Disco on Sunday :ShakeHead: but two gentlemen are trying to make it better by offering me model engine castings, so it would seem my luck may be in :naughty:

Jo
Usus est optimum magister

Online Bluechip

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #185 on: August 15, 2017, 04:42:42 PM »

P.S. What's the point of having guilty secrets if you can't remember them  :-\


Erasing legacy guilty secrets is Mother Nature's way of making room for new ones ..  :ThumbsUp:

Dave.   ( Much fortified by 2 x 500ml cans of Becks.  :DrinkPint:   Life feels almost tolerable ).

Offline 90LX_Notch

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #186 on: August 15, 2017, 05:51:09 PM »
Outstanding work Mike.  I'm just blown away.

-Bob
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My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline BlueRock

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #187 on: August 21, 2017, 10:11:11 AM »
Mind blown.... incredible work Mike! Thanks for posting :)

Offline steamer

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #188 on: August 21, 2017, 10:23:30 AM »
Fabulous work Mike!!!

Dave
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Damned ijjit!

Offline Twizseven

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #189 on: August 21, 2017, 12:12:18 PM »
Mike,

It was a pleasure meeting you at the weekend and seeing your stunning work.  In fact all the work on the ICEBA stand was phenomenol.  It was good talk to Mike Cole and Eric as well.  Maybe if I manage to ever finish the Anzani 'Y' engine I might be able to join your table.  It was also nice to meet and speak to Cherry Hill.

Colin

Online Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #190 on: August 21, 2017, 12:40:04 PM »
Thanks for all your kind words and encouragement.

The Internal Combustion Engine Builders Group (ICEBG) members always make a point of being there on the stand, to talk about and discuss our engines. It's always 'open house'. We try to explain and try to encourage others.

ICEBG is not a club, you do not have to join or pay subs. We only exist to obtain a display table at the various shows in the South of England. Just turn up with your I/C engine, whether part finished or complete and we will make table space for you.

Speaking with Cherry Hill is always an honor, like an audience with the Queen.

Mike
It is the journey that matters, not the destination

Online Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #191 on: August 21, 2017, 04:42:53 PM »
Part 10    Finishing the Crankcase and starting on the Oil Pumps


In this installment from 'Vixen's Den' you can see the hand finishing of the two crankcases and a start is made on the elaborate oil pump arrangement located off the rear main bearing cap and located in the dry sump.

I use a long flexible extension with my Dremel to remove all the unwanted ridges and blend all the corners what cannot be easily reached by my milling machine. I follow the Dremel work with a selection of Swiss files and pattern makers rifler files. Fine grades of 'wet and dry' abrasive papers are used to smooth and refine the surfaces. I also use disks of 'Scotchbrite' mounted on the Dremmel to frost the surface to an even matt finish. When I am satisfied with the surfaces, I can give the crankcase a light grit blasting with fine alumina grit to create the appearance of a casting. The machined surfaces are carefully masked off and protected with painters masking tape to preserve their 'as machined' surface finish.

I made a start on the Main Bearing Caps. As you can see, there are five and they are all different. The rear bearing cap also carries the battery of oil pumps, which are located in that bulge to one side of the crankcase. 




I must have misread my own drawing which resulted in some scrap parts, no, lets call them 'test pieces'. I had inadvertently machined a pump cavity where there should have been a plain bearing. Just look at that main bearing bolt passing through the pump cavity in the rearmost bearing cap....... Dohhhh!




Mercedes have a strange fascination for multiple pumps of all descriptions. In the sump, there is a battery of oil pumps to provide fresh oil for the bearings and several scavenge pumps to scavenge (suck away) the used oil and return it to the external oil tank via the oil filter and oil cooler. You have seen the oil filter mounted on the side of the two stage supercharger. In addition to this set of pumps, there is another scavenge pump for the supercharger, a fuel pump and the main coolant water pump mounted externally at the front of the engine. And, if you like, you can add the two stage supercharger as another huge air pump.



The sump oil pumps consist of a series of simple gear pumps driven from a common shaft. In each pump section there are four oval oil transfer passages outside the pump cavity. Passages are milled into each pump section to connect the pump cavity to the appropriate oil transfer passage. Thin bronze plates divide the pump sections and help control the flow of oil into and out of the battery of pumps.

There are fifteen parts to a pump housing set and each part is slightly different to it's neighbor.  It seemed like a good idea to get a bit organised. I have yet to summon the courage to make and fit the pump spur gears, there are just so many of them.




The bronze block at the front of the pump set is the manifold which connects the various pumps to the external pipework. The first pump section supplies pressure oil to the five main roller bearings. The second section supplies pressure oil to the plain bearings of the four camshafts . The third section scavenges (sucks) the used oil from the front of the dry sump through a strainer, which is yet to be made. The fourth pump section sucks oil from the rear of the dry sump through the integral strainer. The fifth pump section sucks used oil from the four cam boxes and also from the clutch bearing housing at the rear of the engine.












Fresh, cooled oil enters the crankcase through the pipe flange on the right hand side of the case. All of the scavenged (used) oil is pumped out of the crankcase through the angled flange on the left side. You can also see the individual oil connections to each of the main bearing caps.




As with the original engines, everything will connected by large and small diameter copper pipes soldered to the individual flanges. I will be waiting until later in the build  before I make and fit these pipe connections. They look like a snake pit and will be easily damaged if they are fitted to early in the build.




There are times when I wish that Mercedes Benz could have done things in a simpler fashion. But I must keep reminding myself that in 1939 these engines and cars were at the very cutting edge of motor racing technology, no effort (or expense) would have been spared if it produced a fraction more power.

Stay tuned

Mike
« Last Edit: August 22, 2017, 11:57:15 AM by Vixen »
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Online sco

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #192 on: August 21, 2017, 04:52:47 PM »
Awesome attention to detail Mike  :ThumbsUp:

Simon.
Ars longa, vita brevis.

Offline Steamer5

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #193 on: August 21, 2017, 04:59:50 PM »
Hi Mike,
That's just gob smacking!

Cheers Kerrin
Get excited and make something!

Online Vixen

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Re: Mercedes-Benz W165 Grand Prix engine in 1:3 scale
« Reply #194 on: August 21, 2017, 05:02:53 PM »
Kerrin,

It's five in the morning right now for you in NZ!!!!!! don't you guys sleep?


Mike
It is the journey that matters, not the destination