Wanted to post this for other peoples benefit. I know some people don't like to pass on their documented successes with regard to ejection charges but I think its helpful to others.
This is my Demon 5 that I am hoping to fly tomorrow on an L1520T at the QCRC club launch.
Demon 5 is a 5" all fiberglass rocket from Wildmans and it uses HED (head end deployment).
Drogue section is just a OneBadHawk 2-loop kevlar bridle. Using PVC charge pots and ch-ch-ch-china e-matches. Retention is via (4) #2-56 nylon screws as shear pins. Charge was 3.6g of 3F Swiss black powder tightly packed and achieved full extension.
Main section (nose cone) is a OneBadHawk 3-loop kevlar bridle, 18" nomex protector, 48" nomex sheath, 60" Recon chute. Also using PVC charge pots and e-matches. Charge was initially 1.9g of 3F BP and a tighter fitting chute bundle. This first test DID NOT achieve full extension and the chute bundle remained in the nose cone. Unsure if this failure was due to the tight fitting chute in the N/C or the charge, I opted to modify both.
Second test of the Main was with 2.2g of 3F BP and a looser fitting (tighter bundle) in the nose cone. This time, there was a much more energetic impulse and the result was a full extension of the laundry.
Obviously, your mileage may vary so you must test on your own and take responsibility for your own actions. These results are mine and mine only.
This is my Demon 5 that I am hoping to fly tomorrow on an L1520T at the QCRC club launch.
Demon 5 is a 5" all fiberglass rocket from Wildmans and it uses HED (head end deployment).
Drogue section is just a OneBadHawk 2-loop kevlar bridle. Using PVC charge pots and ch-ch-ch-china e-matches. Retention is via (4) #2-56 nylon screws as shear pins. Charge was 3.6g of 3F Swiss black powder tightly packed and achieved full extension.
Main section (nose cone) is a OneBadHawk 3-loop kevlar bridle, 18" nomex protector, 48" nomex sheath, 60" Recon chute. Also using PVC charge pots and e-matches. Charge was initially 1.9g of 3F BP and a tighter fitting chute bundle. This first test DID NOT achieve full extension and the chute bundle remained in the nose cone. Unsure if this failure was due to the tight fitting chute in the N/C or the charge, I opted to modify both.
Second test of the Main was with 2.2g of 3F BP and a looser fitting (tighter bundle) in the nose cone. This time, there was a much more energetic impulse and the result was a full extension of the laundry.
Obviously, your mileage may vary so you must test on your own and take responsibility for your own actions. These results are mine and mine only.
