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Tom Booth wrote: ↑Mon Nov 18, 2024 1:31 pm The displacement should be the same.

The weight dumped over will be compensated by the boat having less weight and rising out of the water.

I figured there must be at least one video on this, here's one by Physics Girl


https://www.youtube.com/watch?v=nVT1c0tr8NE

If you row out into a lake and dump a bunch of weight overboard, what happens to the level of the lake ? I want to say basically nothing lol. What’s a KIA guy? KIA = know-it-all The answer to the rowboat question is sketchy and varies. Let's consider the mass thrown overboard an "anchor" ...

I'll return to this thread in near future, but until then, enjoy this video the question everyone gets wrong.png https://www.youtube.com/watch?v=0syJ8L0fRp8 This reminds me of Elon's favorite interview question: If you row out into a lake and dump a bunch of weight overboard, what happens to the lev...

The end goal of a power piston driven off the hot end is to have it be larger than the displacer, or at least the same size, within a 300k-600k cycle. I have little doubt that my new engine will run with a power piston of 50cc or greater and a displacer of 150cc, within a 275k-373k cycle, so the en...

Matt, I think your depiction of the Stirling cycle is not accurate. At least not by traditional design standards. You don't appear to include, or account for, in any way, the standard 90° advance which IMO changes the dynamics considerably. Using distinct events exposes the most ideal PVT values pe...

Matt has definitely put up quite good logic suggesting that. I would caution definitive comments on it until some actual tests have been performed with indicator, and dynamometer, diagrams have been measured. Rider-Gamma-Essex.png When it comes to hot vs cold PP, this graphic is a home run since it...

. It would be impossible to exceed the "Carnot Limit" because that would mean that the engine converted "ALL the heat" all the way down to Absolute Zero. Carnot won't ever be beaten, even going all the way to zero Kelvin. At the best, it can only be equaled. It is an equation th...

. In fact I'll do it again. Qh heat added from Tc to get to Th. Uh total energy contained in the gas at Th Uc total energy contained in the gas at Tc Qh=Uh-Uc 100=400-300 Heat equals the change in internal energy. Starting point one: Uc=MCvTc 300=MCv300 Maximum point two: Uh=MCvTh 400=MCv400 MCv= M...

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Tom Booth wrote: ↑Sun Nov 10, 2024 2:02 pm

matt brown wrote: ↑Sun Nov 10, 2024 1:58 pm ...removing heat is the only option,...

James Joule proved otherwise decades ago.

I said "Compression involves work INPUT so you can't remove work while adding work, duh. Therefore, removing heat is the only option, but this can be done prior compression or during compression."

Wanting a more accurate picture of actual reality is not "chasing rainbows" its called engineering where percussion matters. PV=nRT provides a rather wild estimate for a generalized, but non-existent "ideal gas". Real gases subject to swings in temperature and pressure, such as ...

It seems the operation of a Stirling engine is an interplay between the natural attraction of the working fluid molecules and their natural repulsion. Everything seeks balance or equilibrium. Compress the gas from its "natural" state of balance and it tries to expand. Expand it beyond its...

Without intermolecular forces PV=nRT has no logical basis. At any rate the ideal gas law is very limited and needs correcting by adding Van der Waals forces in situations involving compression and expansion of gases away from STP. PV=nRT is like a stopped clock. There are only limited situations wh...