Whoops reading comprehension not high this morning. My idea neglected the tail cone part.
kj
FWIW, don't delete any ideas you may have, even if they are out to lunch. I did get the email notification before you edited your post, and it gave me some good food for thought. I'm presently drawing up some new concepts as we speak. Since I'll be in Macon GA next weekend, LW & I can piddle with this in the evening after the launches. SoAR Lilly Launch It appears this is going to require a hands on, trial and error application with custom mods along the way. I still have to figure out what's going to hold the aft section to the forward section in flight!!! It's really hard to draw up a concept because there is so much going on inside this rocket. Makes me wonder if it's even worth the trouble.
WHAT IF IT'S NOT STABLE! CRASHES ON THE FIRST FLIGHT! :y:
Obviously your choice, but this seems like a fascinating project to me, likely to generate a very interesting build thread and unearth some interesting techniques. And it would be an absolute attention-getter at launch, particularly with the spaced-apart canted motors.
If this were my build (and thank god it's not :grin I'd probably do it in the background while working on other stuff; possibly too frustrating to focus on it exclusively. Also likely to benefit from some prolonged pondering.
In any case, I hope you go through with it so I can spectate, but I could understand if you didn't want to.
Since I'll be in Macon GA next weekend, LW & I can piddle with this in the evening after the launches. SoAR Lilly Launch It appears this is going to require a hands on, trial and error application with custom mods along the way. I still have to figure out what's going to hold the aft section to the forward section in flight!!! It's really hard to draw up a concept because there is so much going on inside this rocket. Makes me wonder if it's even worth the trouble.
WHAT IF IT'S NOT STABLE! CRASHES ON THE FIRST FLIGHT! :y:
I am only a couple of hours from Macon, I wish I could get down there and talk through some of the ideas that I have been kicking around.
My thinking thus far has been to keep things as simple and familiar as possible.
The only real complication that I am kicking around is ducting the ejection charge and going with a standard top ejection. While this adds some complexity to the build, it also may help to shift some weight forward in an airframe that I think is going to be very tail heavy.
IT WOULD BE SPECTACULAR!!!! Can you just imagine the balsa carnage that could result?
Bite your tongue.
For what it is worth, here is an .ORK file that I found a while back. I think it came from TRF itself actually. This is NOT my work and I would gladly give credit to whomever created it if I could remember. I look forward to reading more of the conversation about how to do this build!
That is a concept model I created just to get an idea if that sort of configuration could ever have a suitable CG/CP margin of stability. I never built it and don't plan to. Here's my post with a 3D view of the rocket:Thanks, but no thanks. This is nothing but a 3 FNC model with a central motor, to resemble the Web Spinner. I saw this in a previous posting from years ago. I don't remember who made it either, but it's definitely not what I'm aiming for.
I already have a build concept going on, and what I'm trying to achieve, is a working chute deployment and maybe some good tips/ideas on interior construction. My model will be way over the top to the likes of this ork file.
Thank you anyway.
That is a concept model I created just to get an idea if that sort of configuration could ever have a suitable CG/CP margin of stability. I never built it and don't plan to. Here's my post with a 3D view of the rocket:
EDIT: note my comment in that thread post - "This is such an unusual design that I don't actually trust either sim program for stability or apogee projections." By "either sim program," I was referring to Rocksim and Open Rocket, the sims I used to sim that concept design.
I also saw a posting from about 2006 (I think) where someone else had given this a thought or 2. I did see your thread though. Without reading much about it, I had the notion it was a central motor design that appeared to be a 3FNC idea. I'll be using mindsim because I wouldn't trust Rocksim or Open Rocket for something of this nature.
A lot of changes on my drawing board has led me to a nose blow idea that might work with enough nose weight. I'll determine that after I get the 1/2 size prototype built. That goes down this weekend in Macon GA when LW and I will assemble it for interior configs. The drawing below is a simple 2D rendering. If all goes as planned, I should be able to assemble a full size model around 2' tall. I'll be able to redesign the templates for construction as needed. Even if it proves to be unstable, it'll still be a fun project and look great as a display model.
View attachment 301861
If your fore lamp rod lug slides into your aft cardboard lug, your compartment is 'sealed' for the ejection charge and you have a nice torus to lay your recovery train into.
That is the direction that my mindsim was going. If the outer structure seemed weak, I have been thinking about a spar between the MMT and the center line.
3) How many pounds of nose weight are gonna get jammed in there?
Not by much. Having designed this thing from the inside first made it easy to fit the shell over it. I just printed off a scaled down model that uses 13mm motors as a practice build. If this all turns out well, I'll have the laser cuts done soon after for the bigger one.Are the new patterns that much different than what we worked out when you were here visiting that time?
I'll try to get a few pics for you on where I am with the prototype. I found I needed jigs to assemble the **warp engine fins?** I don't know what to call these and can't find the correct info on most of the parts. I did make patterns and templates though. I botched the forward tube section and had to rebuild it. Customizing CR's for a BT 3 to a BT 50 had to be done by hand. yay......You better believe that I'm keeping up with this one! I need something like this to help me get my rocket mojo back!
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