That is a very nice and unique design.
Since it is all wood of same thickness, the mass is distributed proportionately. A wedge shape is therefore expected to be tail heavy.Also worth noting: I did a swing test of the fuselage before adding the wings. I was curious if due to the wedge shape if it would be stable. No nose weight, no motor weight, just the fuselage. It failed miserably.
Since it is all wood of same thickness, the mass is distributed proportionately. A wedge shape is therefore expected to be tail heavy.
I’d put him as a JB weld man.Hans Solo's favorite glue,
Wookiee Glue.John,
Wonderful spaceship to model. Really beautiful. I had not seen it before. And your work, as always, is wonderful.
As a completely pointless aside, your tolerance of all the Star Wars discussion in this thread is truly commendable. I really wanted to ask what they think is Hans Solo's favorite glue, but I'm worried I might exacerbate some health problems.
Wookie Glue is so strong that using it, you *can't* pull the ears off a Gundark.Wookiee Glue.
Because the whole universe speaks English better than Chekov.Come to think of it, if this is a Star Wars vessel, why is it in English at all? And what is it doing so far from its home galaxy?
In Star Wars, they speak English* — but they write aurebesh.Because the whole universe speaks English better than Chekov.
Hmmm…. By MindSim I would expect a wedge shape built of uniform thickness material of uniform density is highly likely to have a CG behind CP. base drag can only do so much.Swing test is done by supporting the rocket by it's cg, which I did. I was curious due to the wedge shape.
Correct. The Art Applewhite pyramid has the motor recessed a good bit towards the nose, and yes, it basically behaves like a saucer.there IS a pyramid rocket out there that is obviously wedge shaped, but I think it had a recessed motor so CG was not solely dependent on material thickness. I think it was also more of a saucer.
I wouldn't worry. And keep in mind, that's me, the forum's leading borrower of trouble, not worrying. Look at the OR screen grab in post #71. Just under 1 caliber static margin in a rather short rocket (L to W is about 5:1). I'm less comfortable relying on the base drag hack than John, but he certainly has a good track record where using it is concerned. The G80 shown in the screen shot looks like plenty of motor; if more motor needed to lift more nose weight? It's already a 29 mm MMT, so worse come to worst it'll need an L1 cert* and there are plenty of options. The G80 weighs 123 g, and a G125 weighs only 2 g more; an H169 weighs 202 g.Hmmm…. By MindSim I would expect a wedge shape built of uniform thickness material of uniform density is highly likely to have a CG behind CP. base drag can only do so much.
there IS a pyramid rocket out there that is obviously wedge shaped, but I think it had a recessed motor so CG was not solely dependent on material thickness. I think it was also more of a saucer.
Options for this bird that I can think of
LOTS of nose weight, which creates a vicious cycle of, “now I need a bigger motor, which means I need more nose weight…..”
Recessed Motor: this lets you use motor for nose weight and given shape, can probably get away with a decent degree of recession without inciting Uncle Krushnic. Problem here is where do you put the chute, and this puppy is gonna need a lot of chute, it’s gonna be heavy.
Tractor motors: you’ve played this card well on priors, not sure it is cosmetically compatible with design…..
Extra Fins: if wood or paper (these seem to be your materials of choice) they are a cosmetic problem. You seem kind of an organic builder, so I think you aren’t going to go the Lexan root.
There is always the flying base. I kind of feel this is “cheatin’”, as using this you can make a true brick fly, but it does double as a display stand and worked well for the Mandalorian. Biggest downside I see for this model is that it displays best (like the picture) horizontal rather than vertical.
https://www.rocketryforum.com/threads/hiding-your-fins-in-plain-sight-240-calories-of-fun.47954/
@lakeroadster should be L1 at least because what feels like a year ago, he built a rocket specifically for L1, called "Level 1", which had a Gemeni/Mercury spacecraft feel to it that he finished with a distressed look with an undercoat and then sanded a bit to make it look like light corrosion. Assuming this rocket flew and deployed properly, He's L1.* Are certified, John?
* Are certified, John? I doubt you'll need to be for this one, but if you keep building the way you do, you may well need a high thrust H motor sooner or later.
Why the two holes?
One is for oxygen, the other for hydrogen. Skim the upper atmosphere and fill the tanks.Why the two holes?
Like a RAM AIR intake on a P- 51D or your favorite HEMI motor in your ROD. High speed slicing through that cold, thin, high altitude air, that's the ticket!One is for oxygen, the other for hydrogen. Skim the upper atmosphere and fill the tanks.
How did you do that! It looks more like blender than open rocket!
The nozzle is underexpanded.
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