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  #11  
Old 12-05-2018, 06:42 PM
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Quote:
Originally Posted by Newbomb Turk
Thanks, Lee!
This was a scratch build, completed just before they released the kit. Still might buy the kit to have one in reserve.

Tubes, transition and nose cone are Semroc, fins hand cut basswood and internals I already had.


I like your idea of using basswood for fins. I also like the idea of getting the kit, since it has laser cut fins. I hand cut all the wood parts for my Super Orbital Transport from basswood. That was over 10 years ago, and I still shudder at the thought.

Maybe a compromise might be to paper the kit fins ... but no reason to worry about it now. I cannot work on any project of substance until my Saturns are complete for next July’s anniversary launches.
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  #12  
Old 12-05-2018, 07:04 PM
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Quote:
Originally Posted by Newbomb Turk
... Lego mini-figs are a huge thing...


ever since those kids put one on a balloon and sent him into space...

https://www.youtube.com/watch?v=MQwLmGR6bPA
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  #13  
Old 12-06-2018, 09:53 AM
stefanj stefanj is offline
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My Farside clone has basswood fins.

If I had to do it again, I would have made them through-the-wall. There is an issue where . . . hmm, how can I put this?

The fins are comparatively huge, and thus there's potentially a lot of torque put on the fin/tube joint. Because basswood is less porous compared to balsa, glue joints don't have as much grip. So they can snap off easily.

Even a small TTW tab could add a lot of strength to the joint.

Of course, this is a problem if you have a 24mm motor in the first stage.
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  #14  
Old 12-06-2018, 02:13 PM
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I’ve had pretty good luck surface mounting basswood fins, but here is an idea for use on the 24mm powered booster on the Farside-X. These pictures are from a post by Gary Rosenfield, showing a neat method he used to enhanced the surface mounting of fins for a minimum diameter rocket.

As I recall, a piece of masking tape was applied inside the tube to prevent leakages of epoxy, then removed once it started to set up.
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  #15  
Old 12-06-2018, 03:07 PM
stefanj stefanj is offline
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That's a really interesting technique! Thanks!
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  #16  
Old 12-06-2018, 04:31 PM
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Quote:
Originally Posted by stefanj
That's a really interesting technique! Thanks!


No problem! After posting the pictures, I’m thinking I’ll start a build of the booster using this technique with basswood fins, and then decide if maybe I’ll just get the Semroc kit for the rest of the build.
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  #17  
Old 12-07-2018, 09:34 AM
stefanj stefanj is offline
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I flew my Farside clone maybe three times:

Successful flight at Roberson Park (?) in Livermore. B14-0 / A8-0 / A8-5

Staging failure, don't remember the motor combo, Sheridan OR. Third stage badly mashed.

Last year in Sheridan, with patched-up third stage, C6-0 / C6-0 / C6-7: AWESOME. Straight boost, awesome altitude. Someone had to find the third stage for me.

* * *

I have a Comanche III unbuilt. I think I'll use Lee's technique to sturdy it up, lengthen the first stage so it can take an E12-0, and fly it next year.
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  #18  
Old 12-07-2018, 10:14 AM
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Quote:
Originally Posted by stefanj
I have a Comanche III unbuilt. I think I'll use Lee's technique to sturdy it up, lengthen the first stage so it can take an E12-0, and fly it next year.
Yeah, that will really help with your recovery chances

Seriously, I'd do something like a C11-0 to A8-0 (or A10-0T) to A8-5 on the first flight. Try to get it all back at least once Then go for the full stack later.

Doug

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  #19  
Old 12-07-2018, 10:15 AM
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Yall are giving me a hankerin for a B14. I need to check on my B4 inventory.
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  #20  
Old 12-07-2018, 02:55 PM
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Quote:
Originally Posted by tbzep
Yall are giving me a hankerin for a B14. I need to check on my B4 inventory.


I have a few but I don't know their history. I think some came from a garage sale so I guess mine are just "collectibles".
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