Over - Under C:B ratio

[nghiagero]

hi guys,

im new to the spud cannon world though i've played around with a few mini spudders in my day. Anyway ive got an enquiery about the design of Over/Under Combustion spudders when it comes to the C:B ratio, i was wondering when calculating the volume of the Barrel does this include the connecting bend from the combustion chamber to the barrel underneath?

[keep_it_real]

The barrel starts where the potato is. Any area behind the potato that has fuel in it is considered the chamber. So in your case, yes it does.

[nghiagero]

ahhh i see, thanks for that