kevinkal
Insatiable Hobbyist
- Joined
- Feb 12, 2016
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I did some charge testing over the weekend. I used the Eggtimer Quantum's wireless test feature to remotely fire the charges.
My calculations were pretty much right on:
⦁ Drogue 4F Black Powder Charge: 1.7 grams
⦁ Main 4F Black Powder Charge: 1.9 grams
I had the rocket at a shallow upward angle to test the drogue charge. It was a nice powerful "pop" and it shot the payload section out, hit the ground about 10 feet ahead and skidded to a stop extending 18' of the 25' Kevlar shock cord. If I had the rocket angled up more, it would have gone to full extension. I'll plan to use 1.7g for the primary drogue charge, and +25% more = ~2.2g 4F for the backup drogue charge.
The main charge test had the rocket at a slightly higher upward angle. It was also a nice separation and "pop". The heavy nosecone with integrated tracker shot out, hit the ground and skidded to a stop, extending 22 ft of the 25 ft shock cord. I'll plan to use 1.9g for the primary main charge, and 2.5g for the backup main charge.
I took some deployment charge test videos. but I'll have to post those later next week.. since I'm scrambling to get everything ready for my L3 flight this Saturday at TCC's Dairy Aire Launch Event.
I've got the nosecone, payload tube and altimeter switch band painted Gloss Red Apple using Rustoleum Painter's Touch 2X. Tonight, I finished sanding the booster and those tedious fin fillets and have the first coat of primer on.. I'll be painting the booster Gloss White. I also have the standard Madcow Frenzy XL vinyl decals to apply.. time permitting.
My calculations were pretty much right on:
⦁ Drogue 4F Black Powder Charge: 1.7 grams
⦁ Main 4F Black Powder Charge: 1.9 grams
I had the rocket at a shallow upward angle to test the drogue charge. It was a nice powerful "pop" and it shot the payload section out, hit the ground about 10 feet ahead and skidded to a stop extending 18' of the 25' Kevlar shock cord. If I had the rocket angled up more, it would have gone to full extension. I'll plan to use 1.7g for the primary drogue charge, and +25% more = ~2.2g 4F for the backup drogue charge.
The main charge test had the rocket at a slightly higher upward angle. It was also a nice separation and "pop". The heavy nosecone with integrated tracker shot out, hit the ground and skidded to a stop, extending 22 ft of the 25 ft shock cord. I'll plan to use 1.9g for the primary main charge, and 2.5g for the backup main charge.
I took some deployment charge test videos. but I'll have to post those later next week.. since I'm scrambling to get everything ready for my L3 flight this Saturday at TCC's Dairy Aire Launch Event.
I've got the nosecone, payload tube and altimeter switch band painted Gloss Red Apple using Rustoleum Painter's Touch 2X. Tonight, I finished sanding the booster and those tedious fin fillets and have the first coat of primer on.. I'll be painting the booster Gloss White. I also have the standard Madcow Frenzy XL vinyl decals to apply.. time permitting.