scsager
Slightly burned-out old guy
- Joined
- Apr 24, 2010
- Messages
- 1,779
- Reaction score
- 80
This is usually the longest step in the build process, attaching and Filleting the fins.
The glue tends to shrink a lot and I go over each joint several times.
The fins are glued to the motor tube and to the mid bulk head.
Glue has been applied to the inside of the airframe where the fin meets the airframe and fillets on the outside of the airframe.
The last step is applying a bead of glue to the edge of each fin, and then seating the bottom centering ring in the glue.
With the fin can sealed up I can finish the motor retention. I'm using a screw on retainer from Rocketarium.
Single use and RMS style motors will fit in these retainers, and they are so easy to use. Not as inexpensive as a simple motor clip, or a "Kaplow" clip, but so convenient. They are attached per manuf. Instructions with JB weld epoxy.
I always mount (permanently) the rail buttons and launch lugs before I paint. I've seen it done the other way paint first then Lugs. I'm not sure which is better. Since I had a batch of JB weld mixed A little goes a long way.
This is the first time I'm using the Doghouse Rocketry buttons with the counter sunk heads. Hope they work as nice as they look. The machine screw length on these is generous. Much longer than I really needed, but I did not trim them. I could have mounted these before finishing the build, and with the tube "open" I could have secured them with nuts on the inside of the air frame. Coulda' - but I didn't. I use the mounting methods described by Matt of Railbuttons.com - he no longer sells the buttons but the mounting info is still on the web. I have never had any buttons come off a rocket ... yet.
The Executioner Kit weight is advertised at 230 grams. With my mid break baffle design, Kevlar shock cord, and 24" nylon parachute, I'm at 275 grams.
Here's a shot of the old (busted)... and the new (hotness) together.
Wisconsin weather - bah! I'm going to have to build another rocket or three while I wait for good painting weather.
Last, but not least... Hey KenRico... here's your Tommy Lee Jones...
[YOUTUBE]ha-uagjJQ9k[/YOUTUBE]
The glue tends to shrink a lot and I go over each joint several times.
The fins are glued to the motor tube and to the mid bulk head.
Glue has been applied to the inside of the airframe where the fin meets the airframe and fillets on the outside of the airframe.
The last step is applying a bead of glue to the edge of each fin, and then seating the bottom centering ring in the glue.
With the fin can sealed up I can finish the motor retention. I'm using a screw on retainer from Rocketarium.
Single use and RMS style motors will fit in these retainers, and they are so easy to use. Not as inexpensive as a simple motor clip, or a "Kaplow" clip, but so convenient. They are attached per manuf. Instructions with JB weld epoxy.
I always mount (permanently) the rail buttons and launch lugs before I paint. I've seen it done the other way paint first then Lugs. I'm not sure which is better. Since I had a batch of JB weld mixed A little goes a long way.
This is the first time I'm using the Doghouse Rocketry buttons with the counter sunk heads. Hope they work as nice as they look. The machine screw length on these is generous. Much longer than I really needed, but I did not trim them. I could have mounted these before finishing the build, and with the tube "open" I could have secured them with nuts on the inside of the air frame. Coulda' - but I didn't. I use the mounting methods described by Matt of Railbuttons.com - he no longer sells the buttons but the mounting info is still on the web. I have never had any buttons come off a rocket ... yet.
The Executioner Kit weight is advertised at 230 grams. With my mid break baffle design, Kevlar shock cord, and 24" nylon parachute, I'm at 275 grams.
Here's a shot of the old (busted)... and the new (hotness) together.
Wisconsin weather - bah! I'm going to have to build another rocket or three while I wait for good painting weather.
Last, but not least... Hey KenRico... here's your Tommy Lee Jones...
[YOUTUBE]ha-uagjJQ9k[/YOUTUBE]