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The Return of No. 83, a Hot Air Engine

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vtsteam:
Test with the thinner flanged, copper ended cylinder (100 watts input) : Started earlier at ~800 RPM. Maxed out earlier at 1367 RPM with an average at the end around 1350 RPM.

Unfortunately, due to double variables (flange difference, end material difference), there is no way of telling specifically why this cylinder is better. Just that it is better, by close to 100 RPM, than the other. Tch tch, mixing variables.  :wack:

Oh, also, it did the same thing -- ramped up at "rpm levels" and responded to a steadying hand pressure by increasing revs.

vtsteam:
I made a firebox door this afternoon, to replace the one that was lost.

 

RussellT:

--- Quote from: vtsteam on April 11, 2025, 12:22:18 PM --- steadying hand pressure by increasing revs.

--- End quote ---

Have you tried clamping it down to the bench?

Russell

raynerd:

--- Quote from: vtsteam on March 23, 2025, 05:28:59 PM ---Well it's kind of disappointing to see the very small amount of interest most visitors to the site pay to people posting here. Other than a welcome few comments from old friends, it's as if we were alone.

Yet I'm seeing 2000 views a day on the progress of this little engine. and in the forum statistics on the front page right now, 500 visitors, and only three members signed in.

This is a rather sad state of affairs, and a forum like this will not continue unless others join, sign in, comment and, one hopes, even add interesting projects of their own. Certainly, now, I'm asking myself just who is it I want to communicate projects to? If it's just lurkers, bots, spiders and AI content reapers, then no thanks, I'd rather just work on my own.

Nope I'd rather talk with real people. Are there any out there in that group of 2000 views, or those 500 visitors today? Say something. Say hello. Say anything! Let us all who post here know that we have a reason to do so. Organic Intelligence.  :mmr:

--- End quote ---

It is a really sad fact. It seems everywhere is quiet. I thought people may have moved to facebook groups but there is sod all on those as well. I remember back in 2009-2011, you could post a picture at 9am in the morning and you`d have a hand full of replies and comments by midday. I don`t know what has happened. I think it is quite self for filling as well- the less people contribute, the less it makes me contribute. I`m not very skilled and learnt everything from this forum and its users when I was really getting into engineering. I use to comment on the comments based on something interesting someone had said, as much as replying to the poster. Discussions spiralled. It is why I started making my little videos but it is all because I enjoy doing it, feedback is minimum.

Hopefully it`ll come back around and people will start posting more.

Your engine is looking great and I`ve enjoyed the pictures  :D :mmr:

vtsteam:
Thanks Chris! :beer: great to see your icon and hear your voice again! Always loved your projects. I'm presently hopeful we can re-kindle interest here.

I also learned a great deal of what I now can do participating here over the years. When I started on madmodder I got a lot of help from the late Rob Wilson, and tons of  encouragement from the late Dsquire. The loss of some of us due to attrition might be a factor, too, sadly.

I think during the last five years or so, YouTube has substituted for fora, and I have a few videos there myself. But it's a very different experience there -- basically passive and disconnected other than brief comments and likes. A forum is a very different animal. It is communication, and a group atmosphere. Shared progress through projects. Frankly, it's more fun -- at least to me.

Anyway, on the positive side of things, I'm seeing more new member requests, and a fair number of views here, so let's keep talking and going!  :nrocks:  :headbang: :coffee:

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