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Our Closest Satellite

As you can tell there is a trend in my posts, a lot of long videos to watch while working. This is a really great documentary, it is pretty long but really inspiring.

I am hoping to finally work on my rebuild designated Type II rocket this week, as my school work has diminshed. So hopefully I can start sanding and dry fitting some parts together. I plan on working on the transition from the upper section to the lower section. Also I will fully document the shock cord attachment for the nosecone, this idea that can be seen in the Blackhawk is rather simple but I do believe I am the pioneer of that method. Hopefully this method will be used in future minimum diameter builds not by me, but by others also.

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Hybrid Motor

Yesterday I was at work, and one benefit of my job is I can listen to music or anything I want while working. So I was bored with Pandora after 5 hours into my shift and started to look for some interesting videos about rocketry.

I found this and listened to it, and really learned a lot about hybrid motors. I do not plan on flying any in the near future, but it still helped me learn about rocket motors in general and I did learn about some physics principals.

-kyle.g

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SpaceX Engine Anomaly

If no one has seen this, its amazing how reliable the Falcon 9 is! One of the engines had a reading of overpressure in one of the engines, so it blow out a safety mechanism on the side to release pressure.

The engine it self did not fail despite what the video says, the rocket continued into orbit. It did not reach its intended target for satellite departure. But still rather impressive.

Go Space X!

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What Motor are you thinking?

So with my rebuild I want to select the right motor, I want to keep the flight under 4000′.

With my original Blackhawk the CTI H143 simulated to 3600′. So I am thinking around that impulse level, I just want something in maybe a red/blue/green colour.

Any ideas?

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Lack of Post

I do apologize for the lack of posts recently. Life has taken over as I am planning a wedding and starting a new position at work.

So the lower section of the Blackhawk did remain intact, but the upper section including the nosecone is unusable. So I order some tubing and a nosecone as can be seen in my teaser post.

But one thing that I did not take into account, was the fact that the original Blackhawk tubing has a smaller diameter then the new tubing. I am going to sand down the edge where they meet to hopefully provide a transition. It will be more aesthetic then anything but will cost me a few hours of work.

I am also excited to show you the paint design for this. I worked with Mark from Stickershock and got a checkered mask, I am debating what color to pain the rocket either fluorescent yellow/orange then the lower half will have a faded checker pattern.

Thanks for reading

kyle.g

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No Idea

Well I have been trying to post atleast one thing a day.

Today I am stumped, I cannot think about what is usefull to others. So really all I wanted to talk about today is the AV-Bay design for Type II.

It will hold my last Raven that is not capable of ejection charges or deployments anymore. But might be useable for data.

It will be flying in tandem with a new Raven I have purchased. Now I need to figure out how to fit two Ravens two batteries and two switches in a 38mm minimum diameter body. I have an idea I just need to find the time to dry fit it.

Pictures will be coming shortly, as I am getting ready for my wedding in 2 months. I am spending more time planning and preparing for that. So pictures will happen sometime 🙂

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In Regards to My Post from Yesterday

With discussion that took place at The Rocketry Forum

http://www.rocketryforum.com/showthread.php?52053-Non-Laminar-Airflow

It seems it could from the heating of the clear coat due to high velocities, or as mentioned within the forum.

When the rocket was entering the ground at a really high velocity, it began to be heated by friction which then made the clear coat absorb the dirt.

More details to come.

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Non-Laminar Airflow

This topic is discussed a lot in regards to body transitions with vent holes for altimeters.

Then I so happened upon this event during a flight that did not end in the best of ways. Just to give a little background it was about 70 degrees F outside, and my rocket was finished with 3-4 coats of clear coat. The rocket was the Blackhawk 38.

So my rocket was only waiting on the pad for a brief 5 minutes. While it was sitting outside for a good hour. But the rocket was not hot to the touch. It was a little breezy so I was not worried about my altimeter over heating.

The time came to launch and as you can read in the report the rocket did end up lawndarting, and could not receover any data. But the simulations with Open Rocket and RasAero had a rough peak velocity of 380MPH. So I can imagine as the rocket is traveling up and back down the outside skin of clear coat got soft, it did not neccesarily remove it but just softened it.

The nosecone was attached to the upper section with 2 Nylon Sheer pins. As you can see in the photo, when the rocket was entering the ground the sheer pin pushed the dirt in a way that represents Non Laminar Airflow.

I found this very interesting as the soft clear coat absorbed the dirt, initially I took the parts and gave them a bath to try to remove all the dirt that can be seen but it would not move. This is when I encoutered this weird occurance.