Special Delivery/Rear Eject Bomb Rocket

Last crawled date: 4 years, 3 months ago

This is another Mini Rear Eject Bomb rocket. This one looks a little more bomb like than my previous one and can be built without painting if you use the enclosed image printed on decal stock.
Build Notes:
1) Print the fins upside down, with the screw portion facing up. Print the nose with support for the middle section.
2) Feed 9BBs into the slots in the nose and drizzle epoxy down to hold them in place for weight.
3) This is a little tricky, but feed kevlar line through the hole in the middle of the nose cone and snag it through one of the slots. Tie a knot in it, cover the not in epoxy, and pull the not back through the slot so it rests on the other side of the hole.
4) The body tube is a BT-60. Use 100mm, which matches the height of the decal.
5) The inner tube is a BT-50. With the rocket dry fitted together, insert this tube through the tail assembly and into the nosecone, then make a mark at the end of the tail so you know where to cut it.
6) Use a BT-5 for the motor tube, of course. I used about 50-60mm of this. Remember that the chute rests along side this tube so don't use too little.
7) Speaking of chute, I used about a 6" or so chute, cut from an old Estes 12" chute I had laying around.
8) The shock cord runs through the center of the rocket. Tie it around the motor tube then make a loop at the end for the chute to attached to. You can see how I did this in the photo.
9) Print the tube wrap on label stock then wrap it around the 100mm of BT-60. Apply several coats of clear coat to this BEFORE you assemble the rocket.
10) Print the nose, fins and retainer in black. Print the motor pod parts whatever color you want.
11) The BT-5 motor tube should be flush with the bottom of the threads for the motor bottom part. The motor tube top part should be close to the top of the motor tube, but need not be flush.
The rocket is a little tricky to load, but is real fun to launch. I wouldn't use anything smaller than an A3-4T with it but it flew fine for me on that. Attached is a video poorly taken with my phone.
https://www.youtube.com/watch?v=ZXTOBEjfVtU