mtnmanak
™
- Joined
- May 5, 2020
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At some point, I had picked up a Composite Rocketry 29mm Go Devil and it had been sitting in the build pile for a while. (As a side note, I am really confused about the relationship between Rocketry Warehouse, Composite Warehouse and Madcow. Probably a discussion for a different thread.)
We moved recently and I found it in the pile, so I dusted it off and thought about building it out. I looked around the forums and couldn’t find much about building out a 29mm minimum diameter dual deploy rocket, so I decided that is how I want to build this one.
I realized up front I would have to make some modifications and add some parts. The kit comes out of the bag as a pretty standard single deploy 29mm minimum diameter. To make it dual deploy, I am had to research some parts.
First parts were easy. Went to the Composite Warehouse site and ordered a 29mm tube for the payload bay and a 29mm coupler for the ebay. I figure I will just cut a switch band off the 29mm body tube as necessary.
I couldn’t find a 29mm minimum diameter retainer, so I will just build one from scratch.
Next problem was to figure out the parts needed to build out the ebay. Turned out to be difficult to find anyone that sells a 29mm sled/system. A number of altimeters will fit in a 29mm build (RRC2, Stratologger, Easy Mini, etc), but I need a fairly well thought out system to get a computer, battery and some kind of switch into such a small ebay. I saw Apogee had a 29mm ebay kit, so I ordered one. I realized when I got it there was no way it work out of the bag. It didn’t fit in the fiberglass coupler and it was way too long. I thought about modifying it, then decided to CNC parts out of FG that would mimic it. As I was designing that, I ran across a 29mm sled Missile Works makes for the RRC2 series altimeters. Looked perfect! I ordered one (I already have a bunch of RRC2L’s on hand) and it fit very well. Will still need to modify the coupler to fit, but the sled is pretty slick. Built in spot for the RRC2, slot for a 400 maH Li-Ion Battery, spot for a screw switch and slots to install terminal blocks on each end.
https://www.missileworks.com/store/#!/29mm-S-M-A-R-T-Sled-for-RRC2/p/39517483/category=9045099
So, here are all the parts I ended up with.
I measured all the parts and created an initial Rocksim file here:
Initial sims show it ending up around a pound and flying between 1000 feet on some F motors up to 9000 feet on an I200.
We moved recently and I found it in the pile, so I dusted it off and thought about building it out. I looked around the forums and couldn’t find much about building out a 29mm minimum diameter dual deploy rocket, so I decided that is how I want to build this one.
I realized up front I would have to make some modifications and add some parts. The kit comes out of the bag as a pretty standard single deploy 29mm minimum diameter. To make it dual deploy, I am had to research some parts.
First parts were easy. Went to the Composite Warehouse site and ordered a 29mm tube for the payload bay and a 29mm coupler for the ebay. I figure I will just cut a switch band off the 29mm body tube as necessary.
I couldn’t find a 29mm minimum diameter retainer, so I will just build one from scratch.
Next problem was to figure out the parts needed to build out the ebay. Turned out to be difficult to find anyone that sells a 29mm sled/system. A number of altimeters will fit in a 29mm build (RRC2, Stratologger, Easy Mini, etc), but I need a fairly well thought out system to get a computer, battery and some kind of switch into such a small ebay. I saw Apogee had a 29mm ebay kit, so I ordered one. I realized when I got it there was no way it work out of the bag. It didn’t fit in the fiberglass coupler and it was way too long. I thought about modifying it, then decided to CNC parts out of FG that would mimic it. As I was designing that, I ran across a 29mm sled Missile Works makes for the RRC2 series altimeters. Looked perfect! I ordered one (I already have a bunch of RRC2L’s on hand) and it fit very well. Will still need to modify the coupler to fit, but the sled is pretty slick. Built in spot for the RRC2, slot for a 400 maH Li-Ion Battery, spot for a screw switch and slots to install terminal blocks on each end.
https://www.missileworks.com/store/#!/29mm-S-M-A-R-T-Sled-for-RRC2/p/39517483/category=9045099
So, here are all the parts I ended up with.
I measured all the parts and created an initial Rocksim file here:
Initial sims show it ending up around a pound and flying between 1000 feet on some F motors up to 9000 feet on an I200.