Author Topic: Flat 4 Lego Vacuum Engine  (Read 765 times)

Offline dudeface

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Flat 4 Lego Vacuum Engine
« on: December 26, 2023, 10:16:12 PM »
Test running my new (incomplete) engine on 1 cylinder.
<a href="https://www.youtube.com/watch?v=qJReIwl6PEs" target="_blank">http://www.youtube.com/watch?v=qJReIwl6PEs</a>
Miles-- Never underestimate the power of lego

Online Kim

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Re: Flat 4 Lego Vacuum Engine
« Reply #1 on: December 26, 2023, 11:03:51 PM »
That's pretty impressive!  Your Lego vacuum engine works pretty well!  :popcorn: :ThumbsUp:

Kim

Offline dudeface

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Re: Flat 4 Lego Vacuum Engine
« Reply #2 on: December 26, 2023, 11:48:20 PM »
It should run way better on 4 cylinders. As you can see it needs a huge flywheel, but on all 4 the hope is that it will self start and run without a large flywheel.
« Last Edit: December 26, 2023, 11:52:35 PM by dudeface »
Miles-- Never underestimate the power of lego

Offline Roger B

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Re: Flat 4 Lego Vacuum Engine
« Reply #3 on: December 27, 2023, 07:59:59 AM »
Off to a good start  :ThumbsUp: :ThumbsUp:  I look forward to see all 4 cylinders in operation  :)
Best regards

Roger

Offline dudeface

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Re: Flat 4 Lego Vacuum Engine
« Reply #4 on: December 27, 2023, 04:32:42 PM »
It doesn't seem to want to run on 4 cylinders. I don't know what's going on.
Miles-- Never underestimate the power of lego

Offline Roger B

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Re: Flat 4 Lego Vacuum Engine
« Reply #5 on: December 27, 2023, 05:20:13 PM »
Have you double checked the valve timing?
Best regards

Roger

Offline crueby

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Re: Flat 4 Lego Vacuum Engine
« Reply #6 on: December 27, 2023, 06:58:46 PM »
Enough air volume from the source for all four? Can you try it on each individually, or on just two?

Offline dudeface

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Re: Flat 4 Lego Vacuum Engine
« Reply #7 on: December 27, 2023, 09:18:08 PM »
The valve timing is correct. I got it to run around 250 rpm very briefly, then it stopped. I'm having problems with one extremely stubborn valve hanging open, even after oiling the heck out of it several times with vegetable oil. Of course, the oil managed to get in the studs holding 2 bricks together, and now that particular valve keeps falling apart. It looks good, but I guess it's not a very good design.
<a href="https://www.youtube.com/watch?v=tGyQWuZq76s" target="_blank">http://www.youtube.com/watch?v=tGyQWuZq76s</a>
« Last Edit: December 27, 2023, 09:27:35 PM by dudeface »
Miles-- Never underestimate the power of lego

Offline steam guy willy

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Re: Flat 4 Lego Vacuum Engine
« Reply #8 on: December 28, 2023, 02:33:48 AM »
Interesting  engine I can remember doing similar with Meccano 60 years ago ??!!!!

More R & D required I think ??

Willy

Offline dudeface

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Re: Flat 4 Lego Vacuum Engine
« Reply #9 on: December 28, 2023, 07:17:23 AM »
I'll be posting videos of more of my engines soon on my channel. https://m.youtube.com/channel/UCPsBGn-rugOhLVwfh47vQDw
Miles-- Never underestimate the power of lego

 

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