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Then my first stirling engine hunt should be delisted when i posted it. Since it got approved and so were other stirling engines i posted, i assumed they were in fact products that steemhunt wants..
And i don’t want to appeal and cause more problems. I just want to see every moderator approving hunts equally. So it doesn’t come to this situations which are not needed.. And also it confuses me (or others) to the point where i don’t know what kind of hunts are good to post since couple of them pass the guidlines and then one similar to the approved ones doesn’t.
Sorry for inconvenience @monajam

2-1. Web services
2-2. Mobile apps
2-3. API, IT solutions, bots, open sources or other types of software
2-4. Tech gadgets, hardware, IoT/connected/wearable devices
2-5. Games
2-6. Innovative Engineering/Design Products (It may cover non-tech products that have been invented based on high-level engineering/design approach to solve a major problem)

These are the type of products to hunt. When reviewing a hunt, I make sure the product comes under one of these. But I don't know about other Mods. I just try to follow the guidelines.
If you think, your product comes under one of these, you can let me know here in the comments (if you don't want to appeal), and I will review again :)
Thanks for your understanding; you are a good hunter , and I often saw you brought awesome and cool products to SH :)

Well i thought it would be okay since it is not some wooden toy or something really out of steemhunt guidelines. it shows in fact how simple stirling engines work (A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, such that there is a net conversion of heat energy to mechanical work). Stirling engines were used and are still used today and i thought this might come under category 2-6. Innovative Engineering/Design Products. Guess im wrong. But since moderators approved it, i figured it is okay to post some different models of stirling engines aswell.
Yeah i am trying hard, so when stuff like this happen i try to get to the bottom of it so i won't make similar mistakes in the future :)