Ammo Can Raspberry Pi Media Center

Nerd Stuff

I’ve been asked by a few people to post pictures and give a parts list for my media center.

This is the device I plug into my TV so I can watch movies and TV shows on it. I just select the movie/TV show I want, and wha-la. It does a good job of automatically downloading cover art from the internet and giving brief plot summaries.
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2012-03-17 rocket launch

Amature Rocketry

Our first launch of a sugar rocket on a stick. By all right, it should not have been launched without a parachute. However, we have perfect visibility for a mile circle, and launched at an angle to keep it away from us. Don’t do this. We’ll not do this again, ourselves.

Shortly after launch, we had our first PVC glue failure. The end cap blew off. I think the fuel had too fast of a burn rate (too hot).  When this happened, it the motor ripped itself from the stick. Despite this, we got a max altitude of aprox 400 ft.  I know the flight isn’t strictly parabolic, but it’s by best guess.

(16 ft/sec^2) * (0.5*10sec)^2 = 400′

Launch site is over water.  Nearest house is about one mile away.  Motor was found, after splashing through about 2′ of water, nose down, embed in packed sand about 2 inches about 600′ from the launch site.  This was way too close for me,  next time will increase the angle of launch tube.  Will add those bath water dyes for children, to make it easier to spot.

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2012-03-02 Rocket Motor 4 Mike Chapaton’s Motor 001

Amature Rocketry

Tested a motor for a co-worker.

 

Average Thrust (lbsf) 1.349 lbsf
Max Thrust 4.98 lbsf
Total Impulse 1.355745 lbs*s
Average Thrust (lbsf) 6.00065097 Newtons
Max Thrust 22.1521437 Newtons
Total Impulse 6.03065422 Newton Sec
Class 6C6-P

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2012-03-02 rocket motor 5 serial 15

Amature Rocketry

Moisture problems. Experimenting with nozzle diameters.

Test Plan located at:

http://public.westmouthbay.com.s3.amazonaws.com/2012%20rocket%20tests/rocket%20motor%20testing%20plan.pdf

 

Average Thrust (lbsf) 3.67657143 lbsf
Max Thrust 6.96 lbsf
Total Impulse 6.61047543 lbs*s
Average Thrust (lbsf) 16.3542045 Newtons
Max Thrust 30.9596225 Newtons
Total Impulse 29.4048597 Newton Sec
Class 29E16-P

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2012-03-02 rocket motor 3 serial 14

Amature Rocketry

Moisture problems. Experimenting with nozzle diameters.

Test Plan located at:

http://public.westmouthbay.com.s3.amazonaws.com/2012%20rocket%20tests/rocket%20motor%20testing%20plan.pdf

 

Average Thrust (lbsf) 5.14 lbsf
Max Thrust 8.57 lbsf
Total Impulse 8.9693 lbs*s
Average Thrust (lbsf) 22.8638591 Newtons
Max Thrust 38.1212593 Newtons
Total Impulse 39.8974342 Newton Sec
Class 40F23-P

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2012-03-02 rocket motor 2 serial 13

Amature Rocketry

Moisture problems. Experimenting with nozzle diameters.

Test Plan located at:

http://public.westmouthbay.com.s3.amazonaws.com/2012%20rocket%20tests/rocket%20motor%20testing%20plan.pdf

 

Average Thrust (lbsf) 5.47774194 lbsf
Max Thrust 11.13 lbsf
Total Impulse 9.27929484 lbs*s
Average Thrust (lbsf) 24.3662101 Newtons
Max Thrust 49.5087066 Newtons
Total Impulse 41.2763599 Newton Sec
Class 41F24-P

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2012-03-02 Rocket Motor 1 serial 12

Amature Rocketry

Moisture problems.  Sugar rockets are hygroscopic.  Experimenting with nozzle diameters

 

 

Average Thrust (lbsf) 5.768125 lbsf
Max Thrust 10.84 lbsf
Total Impulse 9.45395688 lbs*s
Average Thrust (lbsf) 25.6578983 Newtons
Max Thrust 48.2187224 Newtons
Total Impulse 42.0532954 Newton Sec

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2012-02-26 Rocket Motor Test #11

Amature Rocketry

 

 

average 14.1871429 lbs 63.1075556  newtons
max 31.96  lbs 142.165163  newtons
total impulse 16.5138343  lbs-s 73.4571947  n-s
Class 73F63

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2012-02-26 Test Motor Test #10

Amature Rocketry

Our first 2.2 oz motor. Also our first test with my homemade data acquisition system and at Otway. It is arduino based connected to a in-expensive load cell. Beats the heck out of reading the scale one frame at a time. See the test plan for a more detailed desc of the thrust measurement rig.

Test Plan located at:
Test Plan

A test plan is a good idea. Can hand it to anyone with questions and eliminate a lot of trouble and concern.

Also, note the plywood, placed to protect against most unfortunate incidents.

Test Data

average 9.51 lbs2 42.33 newtons
max 23.18 lbs 103.10 newtons
Total Impulse 12.59 lbs-s 56.01 N-s
Class 50F42

 

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2012-01-31 Rocket Motor Test 3

Amature Rocketry

My favorite video.

This is the test that prompted our forced re-location to our field in Otway. This re-location makes us use less than 2.2 oz of propellant per the ATF regs (have to transport it) for now on. Reminder, if you do this stuff, make sure you understand the laws. I wouldn’t image federal explosives charges would be any fun at all. Recommend talking to your field agent.

The kitty litter end cap failed. We half expected it to. The cheaper kitty litter didn’t feel right when I packed it. It shot a wad of propellant 50-75 ft into the air where it just floated around until it burnt off. Pretty actually. When the end cap failed, it caused the motor to get ejected from the stand. Pretty dangerous actually. Glad we were way the heck away from it.

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2012-01-28 Rocket Motor Test 2

Amature Rocketry

Sugar, KNO3. A G70-P motor.

Total impulse (lbs-sec)
25.02693878

Total impulse (N-sec)
111.3253701

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2012-01-31 rocket motor test 1

Amature Rocketry

Nozzle failure, Nothing to see here. Smoke bomb vice rocket motor.

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2012-01-28 Rocket Test

Amature Rocketry

A kittie litter nozzle. A successful test.

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2012-01-24 Rocket Motor Test

Amature Rocketry

First successful motor. First Cement Nozzle. However, fuel still isn’t where it needs to be, and we had nozzle stability problems.

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2012-01-27 Rocket Motor Test

Amature Rocketry

Another Nozzle failure (aka, complete failure). Nozzle consisted of steel washer held in place via cement and PVC fittings. Steel washer moved 90 degrees and came out. Also bad batch of fuel. Neat light show though. Another smoke bomb.

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2012-01-24 rocket motor test

Amature Rocketry

Another nozzle failure. Too big nozzle. Only got thrust just before it that blown off.

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2012-01-21 Rocket Test 200g, nozzle failure, engine weigh 12.7oz

Amature Rocketry

Nozzle failure. No thrust. Nice smoke bomb though. By the way, I don’t light motors this way any more! I’ve since moved up to electrical ignition using nichrome wire, a straw LOOSELY filled with black powder.

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2012-01-19 Rocket Test

Amature Rocketry

We buried our first rocket engine for safety. PVC Rocket.

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2012-09-21 – Cape Lookout Panoramas

Pictures

Allison and myself went up the lighthouse on the 21st. A great trip. I took a series of pictures and stitched them together into panoramas. Most were stitched from 10-20 pictures. Used huggin to stitch them together. Great software. They are in link form (as thumbnails don’t give them justice). You will want to zoom in with your browser.

picture 1

picture 2

picture 3

You will probably want to right click the links and open them in a new tab or window.

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Sous-Vide

Nerd Stuff

I finally finished my Sous-Vide setup. Cooked some fork tender sirloin from Friday and into Saturday.

[flickr album=72157627273134590 num=30 size=Thumbnail]
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More Cape Lookout Pictures

Pictures

I’m attempting to add some more pictures of Cape Lookout that were previously on my webpage.
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Harkers Island, NC to Pax River (Lexington Park), MD Time Lapse

Nerd Stuff, Pictures

Here’s the time lapse from Harkers Island, NC to Lexington Park, MD. Was a drive up for work.

Created with a cheap webcam (moved up to a cheap HP webcam) connected to a MacBook running Gawker. The mount consisted of a wooden spoon held to the rearview mirror using a clamp and zip-ties.

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2010-09-02 Waves Breaking on Shackleford Banks from Harkers Island

Pictures

I took these pictures from our roof, looking out t’words the Banks. Took the pictures around 6:15PM just before Hurricane Earl.

[flickr album=72157624741955461 num=30 size=Thumbnail]

Full size versions are on flickr.com

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2010-05-06 Time Lapse of Sunset at Shell Point

Nerd Stuff, Pictures

Was taken with a Canon Digital Rebel with a programmable trigger, mounted on a tripod. Individual frames then combined in Quicktime.

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2010-04-21 Armecia Lewis Cemetery

Genealogy

Pictures taken at the Armecia Lewis Cemetery, Harkers Island, NC on 4/21/20. We think these are all the memorials.
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2010-02-12 Time Lapse of Snow Fall.

Nerd Stuff, Pictures

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Lightning Pictures

Pictures

Pictures of lightning taken at Shell Point, Harkers Island.

[flickr album=72157623148722374 num=30 size=Thumbnail]

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Time Lapse video from Dayton, OH to Harkers Island NC.

Nerd Stuff, Pictures

Time lapse video taken from Dayton, Ohio to Harkers Island, North Carolina. Less than 30 mins total about 12 hours drive time. The sun rises about four minutes into the video (if the night is unbearable, fast forward 4:00). You can see it set about 15 minutes later. A whole day of driving compressed into less than 20 minutes.

The route was out of Ohio, through West Virginia, Virginia, than through NC. A large portion of it was though the Appalachian Mountains. If you look carefully at the video you can see it starting to sleet, then snow for a period.

Click “The Read the Rest of the Entry” to see.

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Nerd Paper

Nerd Stuff

Misc. engineering paper just right for printing…

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East Carteret Class of 1998, 10 Year reunion

Pictures

Here are the pictures I took at our class reunion. The flickr link is here.
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Misc Pictures

Pictures

Here are a sampling of random pictures I’ve taken. Basically, something to take up space until I add more content.

[flickr album=72157620425720568 num=30 size=Thumbnail]

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Cape Lookout Pictures.

Pictures

This page is a collection of pictures of Cape Lookout, NC that I’ve taken.  

[flickr album=72157620286917105 num=20 size=Thumbnail]

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