boatgeek
Well-Known Member
- Joined
- Dec 27, 2014
- Messages
- 7,411
- Reaction score
- 7,958
As happens with many of us on the outer fringes, I had an oddroc-shaped hole in my life. On a lark, I bought a very heavy cardboard conical thread spool core at a local art thrift store. I’m pretty sure it cost 50 cents. It sat for a while on the table in my garage until inspiration struck. And this I present a Built Thread for Samara.
I like rockets that spin. I wanted to try rear eject since I don’t have any of those. And the TARC team I mentor had a few leftover parts from an Estes Designer Special. And I had some foam core left over from Drag Queen. Add all of that together, and you get this.
24mm motor mount, the top is a 24:18 transition, and a semi-standard centering ring sits aft. Motor retention is with tape. There’s a little chute, though a streamer would work just as well. The little piece of card stock on the motor mount helps keep the recovery train clear of the launch rod.
First flight was yesterday on a D12-3. An unexpected and very happy consequence of the thick heavily canted fins is that they buzz loudly in the air. When I flew, @BEC was a little ways away and came over to ask what the heck it was. Fun. Lots of fun.
The flight was remarkably good for a near-pure mindsim, though I neglected to add dog barf to the motor tube so it got a little scorched on ejection. I need to clean that up a bit before the next flight. I do have an OR model, but it uses the dreaded base drag hack and also doesn’t really fully represent the swept fins. Turns out that it’s very hard to make a normal program do silly stuff like this.
I like rockets that spin. I wanted to try rear eject since I don’t have any of those. And the TARC team I mentor had a few leftover parts from an Estes Designer Special. And I had some foam core left over from Drag Queen. Add all of that together, and you get this.
24mm motor mount, the top is a 24:18 transition, and a semi-standard centering ring sits aft. Motor retention is with tape. There’s a little chute, though a streamer would work just as well. The little piece of card stock on the motor mount helps keep the recovery train clear of the launch rod.
First flight was yesterday on a D12-3. An unexpected and very happy consequence of the thick heavily canted fins is that they buzz loudly in the air. When I flew, @BEC was a little ways away and came over to ask what the heck it was. Fun. Lots of fun.
The flight was remarkably good for a near-pure mindsim, though I neglected to add dog barf to the motor tube so it got a little scorched on ejection. I need to clean that up a bit before the next flight. I do have an OR model, but it uses the dreaded base drag hack and also doesn’t really fully represent the swept fins. Turns out that it’s very hard to make a normal program do silly stuff like this.
