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From an email sent today:
From: Northern Colorado Rocketry <iflyrockets@yahoo.com>
Date: March 2, 2018 at 9:56:53 AM MST
To: Joe Hinton <kjwhouse@msn.com>
Subject: NO GO 4 LAUNCH – RED FLAGS
Reply-To: Northern Colorado Rocketry <iflyrockets@yahoo.com>Members and Friends,
STOP – NO GO for launch. We just got word from the Ranger that due to Red Flag conditions forecast for this weekend, we are going to require NCR to cancel this weekend’s scheduled launch. We thought there was a good chance the red flag conditions would stay south of Denver but we went into effect this morning and have to cancel the Rx Burn and launch. Conditions expected to remain over weekend. Sorry.Northern Colorado Rocketry – Affiliated with both NAR and TRA
See us at http://www.ncrocketry.orgCheck out the BeagleBone Black, or the STMicro discovery platforms. The latter is $12, has 9 axes of inertial/magnetic sensors built in, and probably has all the computing power you need, with a 72 MHz Arm processor. If you need more computing power, the $45 BeagleBone Black runs at 1.2 GHz and has better/more direct interfaces available to connect to other parts of your project than the Raspberry Pi, which was really designed more as a low-cost linux desktop code development platform.
The Russians must have been watching our MHM flight last year and decided to copy our technology:
http://www.cnn.com/2013/07/02/world/europe/russia-rocket-explosion/index.html?hpt=hp_t2
Thanks, Bear. Yes, I am taking a job at Moon Express in Mountain View, CA, and relocating the family out there. This is just too interesting an opportunity to pass up. But I hope to come back to Colorado in a few years, because it’s my home. I’ll miss flying with you guys at the great launch sites out here. Not many other places are such a good spot for rocketry as this, and fewer still have such an active and helpful club.
Featherweight Altimeters will continue while I’m out there. I’ll post updates on the Featherweight site when I know it will be a few days before I can get a shipment out.
I am looking for opinions on center of gravity, forward of center of pressure. From what I have learned so far is that the C.G. should be the airframe diameter, ahead of the C.P. at a minimum. My question is, what would be considered to far forward if I wanted to add just a bit more weight forward to help with the stability ? Thanks for the help !
Adding more stability margin really doesn’t hurt, even for 4 or 6 diameters or more. I have learned to use at least 10% of the rocket length as my minimum stability threshold, and I find that works better for long, skinny rockts and short, fat rockets. A very stable rocket will turn more quickly into the wind (weathercock) but that’s no big deal. Just use a higher-thrust motor if it’s windy.
