giod Posted August 19, 2013 Posted August 19, 2013 Is there a recommended ration of diameter of lift cup in correlation to the size of the Canister/Shell? 3" ball = What Size (Diameter LIft cup) 2" canister+ 2" diameter cup, or is 1.5 inches ok? Does it Matter? How about Depth of cup? I made a 2" Canister Shell, glued a 3/4 " long piece of 1" tube to the bottom to use as a lift cup, then inserted powder and glues on paper on the bottom to hold LIft Powder i., Is this ok? I presume yes, I just am curious if there is guidance in this Area
mikeee Posted August 20, 2013 Posted August 20, 2013 Some people use plastic baggies to hold the lift charge and tape it to the bottom of the shell.You then cover the plastic baggie with paper to protect it from sparks.Some guys also use paper folded with lift powder inside.Cup size is not important, comes down to what you have available that will work.
Mumbles Posted August 20, 2013 Posted August 20, 2013 Cylinder shells don't need lift cups. The final wrap or a pasted lift wrap takes care of all of that. It sounds like you should consider investing in the Fulcanelli articles.
eb11 Posted August 20, 2013 Posted August 20, 2013 (edited) on my 2 inch shells I use the ketchup cups from wendys. I just tape it to the bottom of the shell Edited August 20, 2013 by eb11
TYRONEEZEKIEL Posted August 20, 2013 Posted August 20, 2013 Giod, you are asking very good questions. Keep it up! The whole purpose of a lift cup is to give more compression on the BP for ball shells. You can use just about anything that won't trash out your mortar. Thin plastic or paper works great although I've never needed one. I side fuse my mortars and they work fine.
Arthur Posted August 21, 2013 Posted August 21, 2013 IMO, with good powder you can use any size of cup or bag that just holds the right amount of powder safely- some people use a cup, some a folded paper bag. Poor powder can sometimes need some extra confinement so space for string and paper is then needed
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