Author Topic: Compressed Air V8 Engine  (Read 54520 times)

Offline tvoght

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Re: Compressed Air V8 Engine
« Reply #135 on: August 21, 2012, 04:10:26 PM »
An impressive build.
--Tim

Online mklotz

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Re: Compressed Air V8 Engine
« Reply #136 on: August 21, 2012, 04:18:26 PM »
You've outdone yourself again, Chuck.  Very creative design and beautiful execution.  Be very, very proud of yourself.
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Offline NickG

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Re: Compressed Air V8 Engine
« Reply #137 on: August 21, 2012, 06:46:14 PM »
Awesome work Chuck, I wondered how you would drill the ports in the rotary valve ... never thought of simply using the engine as a jig ... ingenious design.  :ThumbsUp:

Offline BillTodd

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Re: Compressed Air V8 Engine
« Reply #138 on: August 21, 2012, 06:59:38 PM »
Wonderful Chuck :)

I had not realised how small this engine was until I saw you hand in the shot.

Lovely job  :ThumbsUp:
Bill
wy omnibus Latinis taurus stercore?

Offline RMO

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Re: Compressed Air V8 Engine
« Reply #139 on: August 21, 2012, 07:51:40 PM »
Well done indeed.  Simple design.  Thanks for sharing.

Offline Dean W

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Re: Compressed Air V8 Engine
« Reply #140 on: August 21, 2012, 10:10:10 PM »
Excellent, Chuck!  It's great to see it run, and to hear it, too!  You've done a fine job, again.  I love it!
Does the crank case have oil inside, or do you just oil it up before each run?
Dean
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Offline arnoldb

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Re: Compressed Air V8 Engine
« Reply #141 on: August 21, 2012, 10:48:44 PM »
Very well done indeed Chuck  :NotWorthy:

Definitely an engine for the shorter end of my long list  :)

Kind regards, Arnold
Building an engine takes Patience, Planning, Preparation and Machining.
Procrastination is nearly the same, but it precludes machining.
Thus, an engine will only be built once the procrastination stops and the machining begins!

Offline cfellows

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Re: Compressed Air V8 Engine
« Reply #142 on: August 22, 2012, 05:20:44 PM »
Wow, what a great group!  Thank you, all of you, for the support and words of high praise.  Makes me want to get right out there are start the next engine.  But, still got some more work to do on this one.

One observation...  I kind of favor the open and intricate design of separate cylinder barrels and exposed piping for the air routing to the cylinder heads.  But this engine would have been way easier to build if I had made it a solid block design, like an automotive engine.  With an engine block and 2 cylinder heads I could have replaced 8 cylinder barrels, 32 pieces of individual brass plumbing parts, and 48 socket head cap screws.  I would also have eliminated 64 tapping operations.

Next up is the 4 bladed steel propeller which I'm nearly finished with.  I want to post some pictures of the process since some may find it interesting.

Chuck
So many projects, so little time...

Online b.lindsey

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Re: Compressed Air V8 Engine
« Reply #143 on: August 22, 2012, 05:34:35 PM »
Awesome as always Chuck. What a sweet sounding engine too!!  I am very interested in your process for making the propeller too so will look forward to that now.

Bill

Offline Don1966

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Re: Compressed Air V8 Engine
« Reply #144 on: August 22, 2012, 11:28:53 PM »
Yea Chuck, don't forget us we need pictures of the propeller built.  :pinkelephant:

Don

Offline dvbydt

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Re: Compressed Air V8 Engine
« Reply #145 on: August 23, 2012, 12:14:48 PM »
Super job as usual Chuck! It wouldn't look like one of your engines if it was monoblock.
Question - did you intend the crank to be five bearings?

Ian

Offline Alan Haisley

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Re: Compressed Air V8 Engine
« Reply #146 on: August 23, 2012, 08:08:35 PM »

Really pretty engine. The whole flywheel thing fooled me; I thought with that many cylinders it wouldn't even need one.

Do wish it was a little louder on the exhaust note.

Any possibility you could open up the exhaust ports a little?  That might make it louder.


Or some kind of tuned pipe or resonator??


Thanks for sharing this with us, Chuck.


Alan
Near Raleigh, NC, USA

Offline gbritnell

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Re: Compressed Air V8 Engine
« Reply #147 on: August 24, 2012, 12:32:31 PM »
Congrats on another great project Chuck. I thought I was fast but it would be hard keeping up with you.
gbritnell
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Offline cfellows

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Re: Compressed Air V8 Engine
« Reply #148 on: August 25, 2012, 12:50:57 AM »
Super job as usual Chuck! It wouldn't look like one of your engines if it was monoblock.
Question - did you intend the crank to be five bearings?

Ian

Thanks Ian, I had made the crankshaft to accommodate 5 main bearings if I needed them, but I decided 3 was sufficient.

Chuck
So many projects, so little time...

Offline cfellows

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Re: Compressed Air V8 Engine
« Reply #149 on: August 25, 2012, 12:53:36 AM »
Excellent, Chuck!  It's great to see it run, and to hear it, too!  You've done a fine job, again.  I love it!
Does the crank case have oil inside, or do you just oil it up before each run?

Thanks, Dean, the crankcase holds oil to lub the lower end.  However, there are no seals, so I have add oil now and again.  Might have to add a dipstick to tell if it needs oil...

Chuck
So many projects, so little time...