Manometric metering

[DYI]

but if you have a check valve BEFORE the meter, no dead volume would have to be calculated, right?

like a check valve between the fuel and the metering chamber, and a check valve between the air/oxidizer supply.

Nope. The oxidizer flow will still flush the fuel into the chamber and leave oxidizer in the meter, resulting in a slightly rich mix

[Labtecpower]

ahhh, now I understand

so i'll have to keep the meter volume as low as possible.

[ramses]

but if you have a check valve BEFORE the meter, no dead volume would have to be calculated, right?

like a check valve between the fuel and the metering chamber, and a check valve between the air/oxidizer supply.

Nope. The oxidizer flow will still flush the fuel into the chamber and leave oxidizer in the meter, resulting in a slightly rich mix

Okay, I was messed up because I use a quick disconnect and have two removable meters. You would get a lean mixture if you fuel through the propane meter.

[8tonsemi]

Is the formula that JSR gave me manometric or volumetric because Fnord said it was volumetric if that was the formula for volumetric can someone give me the formula for manometric.I don't think hybrid fueling 101 talks about it. If it does I'm sorry for not seeing it. So help with this would be great. Thank you.

[DYI]

8tonsemi, if you can't do something as simple as deriving the necessary fuel pressure for yourself, you really shouldn't be building hybrids. The only thing you need is an equation of state (EoS) for the gases in question, and in all "spudding" application to date, the ideal gas EoS is perfectly fine. As such, you need approximately grade nine level math to figure this out for yourself.

[8tonsemi]

I don't actually build hybrid's yet I'm just gathering information so when I decide to try to make one I'll be prepared.