I haven't done anything with MAPP gas (still thinking about how to best impliment it). I did, however, realize that I left out a major bit of theory. I threw the spreadsheet together to get something working but forgot to make transonic corrections in the barrel. As long as the projectiles are reaso...

I’m on vacation at the moment and not in a good place to be working, but I still started to do some homework…. It seems that MAPP gas hasn’t actually been manufactured in the US since 2008. Is the MAPP that you measured performance differences with the “original” or something more recent. ‘Cause it ...

Buy a certified commercial product. If you need high energy for legitimate sport or research, use commercially manufactured devices that meet safety and legal standards (e.g., regulated airguns, commercial launchers, or research-grade combustion rigs). Sprunki LOL. You’re in the wrong place. 1 - Fo...

Franchement sdt est un excellent travail que L'auteur nous propose ! Il serait fun et génial d'avoir en gaz de combustion le mapp et l'hydrogène... Sauf si celà n'en vaut pas la peine j'ai pû faire différents essais et l'hydrogène le mapp proposent de réelles différences butane et propane plutôt si...

Does the old HGDT show a significant effect in a 1x gun with low versus high static friction? I have no idea. Others would be better positioned to answer that than I would be. I wrote HGDT to model VERA. To date she's the only combustion/hybrid gun I've ever built. HGDT did a pretty good job of mod...

Merci pour ce travail je n'arrive pas à l'utiliser car calc est dur à utiliser pour moi mais ton travail est fort très fort It's an Excel format. If Calc is difficult for you to use, I imagine there's a spreadsheet out there that's easier. Heck, Google Sheets will run online natively. The plots wil...

And there's another beta up - 0.1c. It should be the same link, but just in case...

Il à l'avantage d'être plus facile à allumer donc allumage moins puissant et concernant son énergie est il intéressant ? As tu pû faire des essais en mix hybrid air/h2? No, I haven't done any experiments with air and H2. At least, not with spud guns. My day job has involved some experiments with th...

Je vais essayer d'apporter à notre science donc je ferais différents test avec différents carburant, de l'hydrogène que je vais faire moi même sans oxygène en hybride et comparer les performances pour un mélange donné ✌️, J'en ferais un sujet propre et détaillée I concede that hydrogen could do som...

Salutations et Merci pour ce fabuleux travail ! Je recherche comment l'utiliser, de souvenirs hgdt était un calculateur excellent avec plus de gaz disponibles il aurait été plus abouti 😁 Pour de l'hybride From a performance perspective, there isn't much difference between different hydrocarbons. It...

[oops, where's the delete button?]

You're correct. Friction isn't in there. It was one of those, "Doesn't seem to matter" things from my perspective, but then, I've never dealt with a Nerf blaster. It's easy enough to do, however. Thanks for the feedback and look for both contact info and friction in the next iteration.

If you've read THIS THREAD , then you know I'm writing a replacement for GGDT/HGDT. The replacement is a single spreadsheet to replace *both* GGDT and HGDT. Why a spreadsheet? Because it maximizes portability. Where GGDT/HGDT were Windows apps, spreadsheets can be imported into office tools on any p...

Ultimately, yeah, but right now don't bother (the latest/greatest isn't online). I'll update this thread when I upload something new.

After all, the last thing I want to do is make some "minor" change in a live version and blow everything up.