13161887_10208415511217762_3577809641947962019_o.jpg
Likes Like
RocketEZI-65
Launches1
Flight StatusSuccess
Event
20160514.pngNEFAR-TRA Research Launch 2016-05-14
Altitude8536 ft
2601.77m
Expected9500 ft
2895.60m
Velocity545 MPH
877.45km/h
Wind Speed8.0MPH
12.88km/h
NW 315°
Weight6.00lb.
2.72kg
StageMotor
1 K261

EZI-65-Counter spin test

2016-05-14 14:03:00Z

Insane Rocketry

Likefileicon PARTIALdatafile160514_122046_885.csv

Stratologger

Likefileicon 20160514_C1.pf2 Likefileicon 20160514_C2.pf2

Description

Great launch.

Since the CATO, this rocket has had a spin to it. To compensate, originally I had two pieces of tape stacked on top of each-other on the bottom of the fins. In a previous launch, the second piece of tape started peeling around max velocity and cause a crazy spin in doing so.

This time I only had one piece of tape on the back of each fin so it would stick better. I placed the tape counter to the spin direction. Two pieces of tape is exactly what was needed but the spin was greatly reduced even with one piece. Now that I know the amount to build up the back of the fins, I will remove the tape and make a more permanent solution.

First test of Android version. I spent many hours after work building the newest Android version, so much so I didn't have time to modify the bay to accommodate it until Friday night! Due to that, I had to do additional in-field mods to get the phone to fit properly with radio, etc. This took hours on the field of cutting my foam to exact shape, testing & retesting fit. I didn't want to cut too much off and I needed to learn the best way to rig the wiring to the GRMS radio.

The battery on the test phone was draining fast, I think bluetooth may drain the battery faster so I'll try not to use it next time. Update 2017-05-15: The battery on the phone was bad, once I replaced it, the phone works with much less heat and lasts longer. My code was also too sensitive to barometer changes and thought small changes in pressure were launches. This caused it to constantly upload data to both youtube and insanerocketry, further draining the battery and generating heat.

By the time the rocket launched at 12:20, the temperature in the bay was 116.2 degrees Fahrenheit (computer 2, closest to phone battery)! I can't imagine how hot the phone was.

Due to the rush to launch from the draining battery, I didn't acquire link to pre-record video prior to launch. This ended up being a good thing as video capture chews up CPU and generates tons of heat. 5 seconds after starting video, the phone overheated and shut down. Had I started a pre-record capture, I would have gotten only footage on the ground prior to launch.

Lastly, I misaligned the camera since it was a rush job on the field. No worries, I'll have it cleaned up for the next launch.

Most of the equipment shut down from heat 7 seconds into launch including the barometer. Last read from barometer was 1047M, 3435 feet.

Video/Photos overheated and failed around 3000 feet.

 

Comments

frewi80
Like 2016-05-15 13:17:28Z

Love that take off Jason, Hoping for Jimmy his video soon, wanna see that again.. Wanna see the rotation on that flight !


Video


Like

Like

Images

13161887_10208415511217762_3577809641947962019_o.jpg
Like
vlcsnap-2016-05-15-16h18m37s56.png
Like
vlcsnap-2016-05-15-16h18m59s105.png
Like
vlcsnap-2016-05-15-16h19m08s106.png
Like
vlcsnap-2016-05-15-16h19m14s106.png
Like
vlcsnap-2016-05-15-16h41m31s72.png
Like
image.jpeg
Like
image.jpeg
Like
image.jpeg
Like
13235420_10209737315575826_268809973731679160_o.jpg
Like
075-NEFAR-May-14-2016.jpg
Like
084-NEFAR-May-14-2016.jpg
Like
085-NEFAR-May-14-2016.jpg
Like
087-NEFAR-May-14-2016.jpg
Like
094-NEFAR-May-14-2016.jpg
Like
095-NEFAR-May-14-2016.jpg
Like
097-NEFAR-May-14-2016.jpg
Like
DSC_3310.jpg
Like
DSC_3312.jpg
Like
DSC_4066.jpg
Like
DSC_4071.jpg
Like
DSC_4072.jpg
Like
DSC_4073.jpg
Like
DSC_4074.jpg
Like
DSC_4075.jpg
Like
DSC_4076.jpg
Like
DSC_4077.jpg
Like
DSC_4078.jpg
Like
DSC_4079.jpg
Like
DSC_4080.jpg
Like
DSC_4084.jpg
Like
DSC_4095.jpg
Like
DSC_4096.jpg
Like
DSC_4097.jpg
Like
DSC_4098.jpg
Like
DSC_4099.jpg
Like
DSC_4100.jpg
Like
DSC_4102.jpg
Like
DSC_3337.jpg
Like