Dinkel GX Kleinefeuerwerkswaffe

lakeroadster

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techrat

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This can't be real. I mean, it sounds like a blog-gag that got out of hand. Wikipedia has zero. There was never an aircraft company named "Dinkel". But hilarious nevertheless, and whoever came up with this was true genius.
 

MadRocketer

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Fireworks fuels aircraft! Of all the wacky ideas the nazis came up with, this almost made sense. One thing that is true about them is that they weren’t afraid to experiment.
This one must be launched with a sparky motor though, ok?
 

Sandy H.

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If it were anyone but you, I'd guess this thread was a joke. Given that it is you, I imagine the rocket will be built within a week or two, very well rendered to the original subject and be flown successfully.

Good stuff!!!

Sandy.

[edit: Seems from your post 2 minutes before mine, that I am likely correct, LOL!!!]
 

techrat

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Estes had a series of rockets called "Goonies" that would have been perfect for this rocket. They were basically a fat tube, a nosecone, some fins and then the stickers were what made the Goonie a Goonie.
 

Funkworks

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That is such an interesting vehicle. But for something short like that, you need a lot of weight in the ... TRANSPARENT nose. Now that's a challenge! That astronaut might have to go on a weight gain diet, or else be replaced by one made of lead. I can't quite see how you dealt with that in the simulator.
 
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Bill S

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Maybe some sort of lead wire for the front window assembly? Or a 28mm sized pilot figure from some company that makes lead miniatures (I haven't been able to find any online though).
 

Funkworks

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I think if the pilot figure were carved from granite, this might work out.
If going the carving route, might as well use soapstone, I just found out it's more dense than granite (it's the easiest rock to carve). But carving a nice figure is a big job.
Granite: between 2.65 and 2.75 g/cm3
Soap stone: 3 g/cm3
Lead: 11.34 g/cm3

Maybe some sort of lead wire for the front window assembly? Or a 28mm sized pilot figure from some company that makes lead miniatures (I haven't been able to find any online though).
Lead miniatures are harder to find than in the past, but there should still be many options.

... I have some clear epoxy I could make the nose from. If anything, it'll be too heavy.
Never saw that. Cool. I wonder what it looks like when dry.
 
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lakeroadster

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Making a bit more progress on the GX Kleinefeuerwerkswaffe simulation.

Had to revert back to Open Rocket 22.02 Beta 01. The cage I made that goes around the acrylic nose just disappeared in the 3D Finished view type and in Photo Studio? I opened the file in OR 22.02 Beta 01, and there it was, back again. Go figure? I'll file a report if I can figure out how to do so and not use Github.

2022-10-05 02 Open Rocket Simulation.png 2022-10-05 03 Open Rocket Simulation.png D
 
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BABAR

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RE nose: There was a (maybe still is, although it has been 20 plus years) a guy in Sedona, AZ, who took various solids three dimensional polished transparent plastic blocks (Lucite? Not sure wha they were, they looked like glass, polished and transparent like glass.). He used an electric drill from what would the bottom, and would drill out a “flower” from the block. The drill would remove the plastic and leave a translucent “hole” that was clearly visible from all the other polished facets of the object. He would use a pipette (I think) to drop colored inks or dyes into the various holes to color the flower. I think he covered the “base” with the hole with felt.

if You didn’t know how it was done and looked at it, you’d swear it was glass poured over some sort of flower that resisted the heat. When you PICKED it up, it was still pretty heavy but you knew it wasn’t glass because it wasn't THAT heavy. Still looked like clear resin or plastic poured over some solid object, when in reality the apparent ”solid” object was really the HOLE in the solid object.

not sure you couldn’t do something like this if you had a solid half egg shaped polished piece of Lucite or whatever. The carving (rough out a pilot and seat and stick) would take some guts, kind of like Diamond cutting one screw up and you are reaching for your next piece of polished Lucite.

if you go rear eject, might help of the basal “skids” were attached to the ejection plate/motor mount pod. Rocket comes down rocket body first, then motor mount with skids, then chute. Less stress on skids with impact. Just gotta come up with a “panel“ that keeps the chute and cord from tangling with skids.
 

boatgeek

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Fireworks fuels aircraft! Of all the wacky ideas the nazis came up with, this almost made sense. One thing that is true about them is that they weren’t afraid to experiment.
This one must be launched with a sparky motor though, ok?
Sadly, to get a sparky, you have fairly limited options and likely all too big for this model as shown:
CTI 24mm 3G F50
CTI 29mm 2G G80
AT 29mm G72, G75, or H115 (all single use)

Not to mention that you need to have an L1 cert to fly sparkies and @lakeroadster is a resolute non-joiner. Jointer and planer perhaps, lather definitely, but never a joiner. :D
 

MadRocketer

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Sadly, to get a sparky, you have fairly limited options and likely all too big for this model as shown:
CTI 24mm 3G F50
CTI 29mm 2G G80
AT 29mm G72, G75, or H115 (all single use)

Not to mention that you need to have an L1 cert to fly sparkies and @lakeroadster is a resolute non-joiner. Jointer and planer perhaps, lather definitely, but never a joiner. :D
Ah, yea, didn’t think of that.
Night launch with blinky lights in the cockpit?
 

mjennings

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I don't have a link handy but I've seen lots of demo videos of people putting all kinds of stuff in resin and turning and polishing it on a lathe. One was a xwing tie dogfight! So it's doable.
 

lakeroadster

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Sadly, to get a sparky, you have fairly limited options and likely all too big for this model as shown:
CTI 24mm 3G F50
CTI 29mm 2G G80
AT 29mm G72, G75, or H115 (all single use)

Not to mention that you need to have an L1 cert to fly sparkies and @lakeroadster is a resolute non-joiner. Jointer and planer perhaps, lather definitely, but never a joiner. :D

You know me well.... but I did join NAR this year. :eek:

Old dogs... new tricks... and I'm considering a scratch build L1 if they'll let me scratch build / scratch design something other than a 3/4FNC rocket.
 

techrat

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Old dogs... new tricks... and I'm considering a scratch build L1 if they'll let me scratch build / scratch design something other than a 3/4FNC rocket.
I was just having this argument in another thread (Draggy L2 Rocket), and "Oddrocs" were basically poo-poo'ed to keep out spools and pyramids, but, if you do something fairly normal with ring fins or tube fins, that's very allowable. If you can show a SIM that your design is stable and will fly in a non-dangerous fashion, it will likely be allowed.
 

Sandy H.

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@Sandy H. , @techrat , @Bill S @Funkworks

There is an actual acrylic nose cone in the simulation. I have some clear epoxy I could make the nose from. If anything, it'll be too heavy.

One of my other hobbies is/was pen turning and it was very common to make custom blanks from Polyester Resin. My wife and I did it a lot and then turned the results on the wood lathe.

If you're interested in some info from what we learned, I'll be glad to pass it along, but also don't want to write a long post and find out you already knew about it from a different hobby.

To get water clear castings, degassing with a vacuum pump is very helpful and also pressure casting can be helpful. If you made the nosecone solid resin, it would weigh a buuuuuuuuuunch. If you drill it out to put the pilot in, it'll take a good bit of polishing with a Dremel or similar to make it look clear. I could see making a simple mold, suspending the pilot in it, pouring half of the mold, letting it go green, then pouring the second half. It would be heavy, clear and able to be shaped/sanded on the lathe and finished on the buffing wheel. Possible parting line visibility, but maybe not.

OK, too much unrequested info already. . . I'll shut up now, as you obviously do good work and probably have had your hands in tons of different hobbies over the years. . .

Sandy.
 
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