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  #11  
Old 06-14-2013, 03:52 PM
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chadrog chadrog is offline
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Zactly what I was thinking, bring it to Bong!
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  #12  
Old 06-14-2013, 07:52 PM
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Kevin Huddleston Kevin Huddleston is offline
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I'm thinking I should. This is the first 80 ounce rocket I've launched... and to my chagrin, I didn't think about the weight limit. I could apply for an FAA waver, but I'd rather just take her to Bong.

That brings up another question I have. When the regulation says that you must have 5 MILES of horizontal visual clearance for Class 2 birds, does that mean 5 miles of GROUND horizontal clearance (impossible for a significant percentage of the country), or just-above-horizon visibility (i.e., the sky just above horizon for the sake of lower flying aircraft)?
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  #13  
Old 06-15-2013, 01:27 PM
MadHatter MadHatter is offline
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Quote:
Originally Posted by Kevin Huddleston
I'm thinking I should. This is the first 80 ounce rocket I've launched... and to my chagrin, I didn't think about the weight limit. I could apply for an FAA waver, but I'd rather just take her to Bong.

That brings up another question I have. When the regulation says that you must have 5 MILES of horizontal visual clearance for Class 2 birds, does that mean 5 miles of GROUND horizontal clearance (impossible for a significant percentage of the country), or just-above-horizon visibility (i.e., the sky just above horizon for the sake of lower flying aircraft)?


My understanding is straight line 5 miles from your launch area to the closest point of the airport.
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  #14  
Old 06-15-2013, 02:51 PM
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mwtoelle mwtoelle is offline
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Also, you need to note that 5 miles means 5 Nautical miles (6076.12'), not 5 statute miles (5280'). The distances are reckoned as the crow files.
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  #15  
Old 06-15-2013, 03:52 PM
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chadrog chadrog is offline
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Quote:
Originally Posted by Kevin Huddleston
Soon, I hope! Been rainy or too windy here for me to launch her. The field I use is compliant with HP guidelines, but just so. Can't have a day with 15 MPH winds and fly too high!

One of my original questions was about black powder. I have 1.5 grams for each charge (maybe .2 grams more than suggested for the volume). There are three shear pins for the main, two for the nose cone. Should I add any more black powder to ensure they will be cut?


Ground testing your charges in full flight configuration is the best way to confirm that your charges are adequate. It's a PITA, but it's worth the time in the end. Make sure you let your neighbors know what you're up to.
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  #16  
Old 06-15-2013, 06:48 PM
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Kevin Huddleston Kevin Huddleston is offline
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Quote:
Originally Posted by chadrog
Ground testing your charges in full flight configuration is the best way to confirm that your charges are adequate. It's a PITA, but it's worth the time in the end. Make sure you let your neighbors know what you're up to.


You're right about the PITA. I have tested this without the shear pins, but not with. Dread rigging everything up, but maybe I should. As for the Class 2 requirements, #2 point just says "At any altitude where the horizontal visibility is less than five miles" so I wasn't sure exactly what that meant.
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  #17  
Old 06-15-2013, 07:04 PM
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chadrog chadrog is offline
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Ever been to the Johnson Creek field? We have a launch there tomorrow, pack up your rockets and come on out!
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  #18  
Old 06-15-2013, 07:25 PM
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Kevin Huddleston Kevin Huddleston is offline
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Nope, never been tot he Johnson Creek launch. I have some medium-powered rockets aching to be launched! Maybe I will make it out there... depends on things at home. Wife and one of the kids are sick. Wish I could come to more launches. Bong is quite a ways from where we live. Wish there was a HP launch closer.
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  #19  
Old 06-15-2013, 07:50 PM
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chadrog chadrog is offline
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That sucks. Happy fathers day anyway!
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