I created a google spreadsheet to explore efficiency further. The link below leads to a public copy, feel free to mess around with it.

https://docs.google.com/spreadsheets/d/1HXUKrhNELQxY1WBzh4bIXGMX5ZxEl7zPOjIznKFOG0M/edit?usp=sharing

This seems to support my suspicion that dead volume between ...

As promised, I have attached a higher resolution image of my test setup.

I've thought at length about your comments about dead volume and efficiency but am still confused.

Some definitions (correct me if I am wrong):
- My definition of dead volume is the volume of gas that does not contribute to ...

Thanks for your response! For some reason, I can't embed images in the post using the img tag (google drive or imgur). I've included two grainy images as attachments. I'll take a better picture and post this evening.

For my efficiency calculation (shots per tank = Ptank*Vtank/(Pacc*Vacc)) I have ...

Hey Folks,

I've been working on a piloted QEV style paintball marker and am running into results that I do not understand:
- Paintball velocity is ~75% of predicted velocity
- Efficiency (shots per tank) of set-up is ~20% of predicted value

I'm hoping someone here might be able to help me ...