Author Topic: Bruce Macbeth Engine, European Version  (Read 57144 times)

Offline Admiral_dk

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Re: Bruce Macbeth Engine, European Version
« Reply #630 on: January 19, 2022, 12:18:19 PM »
That was a very interesting little tidbit Roger - do you have any reference, or was it just told verbaly to you ?

Nice CAD work Achim - I hope it will solve your last problem  :ThumbsUp:

Per

Offline Rustkolector

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Re: Bruce Macbeth Engine, European Version
« Reply #631 on: January 19, 2022, 03:34:40 PM »
Achim,
Have you verified the closing degrees of all your valves. The closing degrees are very important.
Jeff

Offline fumopuc

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Re: Bruce Macbeth Engine, European Version
« Reply #632 on: January 19, 2022, 03:59:08 PM »
Achim,
Have you verified the closing degrees of all your valves. The closing degrees are very important.
Jeff


Hi Jeff, to be honest, no.
Not so far.
I have only done the adjustment with focus at the opening of every single valve.
At the next opportunity I can do this.
Do you have any values/figures as reference ?


Today was the day of assembling the entire components again.



Kind Regards
Achim

Offline Dave Otto

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Re: Bruce Macbeth Engine, European Version
« Reply #633 on: January 19, 2022, 04:17:49 PM »
Wow that looks nice!!

Dave

Offline Kim

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Re: Bruce Macbeth Engine, European Version
« Reply #634 on: January 19, 2022, 05:29:09 PM »
Wow is right! That's Beautiful, Achim!

Kim

PS The little red fire extinguisher detail really caught my eye.  Love those tiny details!

Offline RReid

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Re: Bruce Macbeth Engine, European Version
« Reply #635 on: January 20, 2022, 01:26:29 AM »
That really does look wonderful. The "base as mini-diorama" really sets the engine off well, and also puts it into context.  :ThumbsUp:
Regards,
Ron

Offline Rustkolector

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Re: Bruce Macbeth Engine, European Version
« Reply #636 on: January 20, 2022, 04:59:13 AM »
Achim,
You need to verify valve opening and closing degrees to determine the correct valve duration. When things don't work as expected, it is a logical place to start looking for the problem. Nominal durations: I - 200, E - 220 with no overlap at TDC.
Jeff

Offline Craig DeShong

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Re: Bruce Macbeth Engine, European Version
« Reply #637 on: January 20, 2022, 09:54:37 AM »
Great to see you have your model running.  It looks fantastic. 
Craig
The destination motivates us toward excellence, the journey entertains us, and along the way we meet so many interesting people.

Offline gbritnell

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Re: Bruce Macbeth Engine, European Version
« Reply #638 on: January 20, 2022, 11:45:36 AM »
Truly outstanding work!  The whole presentation is wonderful!
Talent unshared is talent wasted.

Offline ShopShoe

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Re: Bruce Macbeth Engine, European Version
« Reply #639 on: January 20, 2022, 01:30:28 PM »
Pardon my late reply.....

I'm glad to see the final version of this engine completed.

I have to say that I think you are a confirmed detail worker who wants to make it exactly the way you plan it and I admire the way you went about it and I enjoyed every post you made.

If you start something new, I will be following.

ShopShoe

Online Roger B

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Re: Bruce Macbeth Engine, European Version
« Reply #640 on: January 20, 2022, 08:37:48 PM »
That was a very interesting little tidbit Roger - do you have any reference, or was it just told verbaly to you ?

Per

I found this by a number of routes. L C Mason refers to a carb with two butterflies, one before the jet and one after and the relationship between them. I have a couple of commercial carbs that I have modified for my engines and noted that the air intake bore was bigger that the bore in the barrel and the engine side bore. If you go to the extreme and make the inlet side bore bigger than the air intake side you will end up drawing neat fuel and no air. For a high volume production finding the optimal bore can be done by experiment. For a one off as soon as you open the air intake past the optimum you have to make a new body  ::)
Best regards

Roger

Online Roger B

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Re: Bruce Macbeth Engine, European Version
« Reply #641 on: January 20, 2022, 08:56:36 PM »
Achim,

I do enjoy the attention to the small details that you and many others on here put into your work  :praise2:  :praise2:
Best regards

Roger

Offline Admiral_dk

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Re: Bruce Macbeth Engine, European Version
« Reply #642 on: January 20, 2022, 11:15:09 PM »
Quote
For a one off as soon as you open the air intake past the optimum you have to make a new body  ::)
 

Well that goes without saying  ;D  - not that it will prevent me from making that mistake  :-X

Like the rest here - I really enjoy to see your last pictures Achim - amazingly result  :praise2:

Per

Offline Don1966

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Re: Bruce Macbeth Engine, European Version
« Reply #643 on: January 21, 2022, 04:59:21 AM »
Outstanding work Achim enjoyed your build  …… :Love:



 :drinking-41:
Don

Offline fumopuc

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Re: Bruce Macbeth Engine, European Version
« Reply #644 on: January 21, 2022, 06:40:50 AM »
Don, Per, Roger, ShopShoe, George, Craig, Jeff, Ron, Kim and Dave thanks for watching and all the friendly comments.
Very good to know that you are all following, I do appreciate it very much.
I am very happy to be a member of this friendly and global community.
« Last Edit: January 21, 2022, 07:39:57 AM by fumopuc »
Kind Regards
Achim