MCriscione
Well-Known Member
- Joined
- Jul 9, 2015
- Messages
- 302
- Reaction score
- 18
I have a Madcow 1.6" Cardboard Frenzy that I modified to accommodate an Eggtimer Quark and DD. I've got my charges calculated, but haven't started testing yet. Tonight hopefully that will begin.
Based on my calculations, the airframe length/volume is approx. 14" / 67 in3 for the drogue and 6.5" / 31 in3 for the main. (these are not reduced for chute, recovery harness, nomex, etc. that will also be packed in there, as I understand that is typically ignored in charge size calculations. I'm pretty confident based on other posts, online calculators, and basic PV=nRT calculations, that I'm looking at about a 0.2g drogue charge and a 0.1g main charge. I think my scale can handle those amounts, but I'm less certain I can measure and contain them. That's a pretty small volume.
Thus my question(s): 1. Is containing a charge as small as 0.1g in a latex 'fingertip' workable? 2. Would a small diameter cardboard tube with hot glue caps work better? 3. With a charge this small, is there a 'wrong' way to pack it in around the e-match? 4. Does the e-match contribute any significant additional amount of charge volume/weight that I should consider when dealing with such small amounts?
Maybe most importantly: 5. Does 0.2g/0.1g seem reasonable? I seem to recall that Estes B/C motors had larger charges than that, but then they also tend to be oversized.
Based on my calculations, the airframe length/volume is approx. 14" / 67 in3 for the drogue and 6.5" / 31 in3 for the main. (these are not reduced for chute, recovery harness, nomex, etc. that will also be packed in there, as I understand that is typically ignored in charge size calculations. I'm pretty confident based on other posts, online calculators, and basic PV=nRT calculations, that I'm looking at about a 0.2g drogue charge and a 0.1g main charge. I think my scale can handle those amounts, but I'm less certain I can measure and contain them. That's a pretty small volume.
Thus my question(s): 1. Is containing a charge as small as 0.1g in a latex 'fingertip' workable? 2. Would a small diameter cardboard tube with hot glue caps work better? 3. With a charge this small, is there a 'wrong' way to pack it in around the e-match? 4. Does the e-match contribute any significant additional amount of charge volume/weight that I should consider when dealing with such small amounts?
Maybe most importantly: 5. Does 0.2g/0.1g seem reasonable? I seem to recall that Estes B/C motors had larger charges than that, but then they also tend to be oversized.