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Does anyone here use fountain pens?

A cursory search here returned no results, so following is a document detailing the Pencil Rocket, which began the Japanese Space Program. https://global.jaxa.jp/article/interview/sp1/index_e.html If anyone is interested.

Guess the rocket/rocket motor (or is it engine?) Basically, I took a bunch of photos at the Houston Space Center. They are of varying degrees of difficulty to figure out and listed in no order particular to that property. Following is the first one.

First of all, if so, pics! Additionally, has anyone made a decent model rocket using the rules for it? (i.e. no cutting, starting with a square, no gluing, threading, etc.) How did it fare? It seems like an interesting concept (to me) to be able to print and cut out a bunch of fold patterns...

So there have been other mistakes in the past (polar ice caps are not salt water, Triple Beam Balance measure relative weight not mass, etc.) but this is unreasonable:

Despite what the title implies, this isn't going to be a recurring thing, unless someone else has their own math problems share. Assumed figures are made up. You are digging a tunnel through a mountain. The path is 310 km in length and in the form of an equilateral equiangular quadrilateral...

I'm searching for detailed plans (or sources where plans may be found) of the X-15. I know now that there is contradicting data, but I want to base my build off of something. Thanks!

How To Trash a Semroc Trident in easy steps plus pretty pictures. Pictures usually only cover finished products and not the steps to that stage. (you know, the actually important stuff)

https://en.m.wikipedia.org/wiki/SNECMA_Coléoptère Has anyone built one?

These are for low powered (and possibly mid powered) models, if anyone's interested. Posting will be of individual steps and sporadic (when I have the time and energy), but I'm aiming for completion by the end of the week. Feedback is welcome. Disclaimer: I'm not responsible for any damage...

If the people of TRF are exposed to a thread that is titled "Phunny Psychology I," and containing the exact same text and other information as this post, how will they respond and why? If we change the content variable to [What is the correct pronunciation "Cato," "Cay-toe" or "Cah-toe?"] how...

NASA's Technical Report Server has many documents that can be useful in the building of model rockets, scale or not. If you find any, please post the link here to share it with others, in the following format: [Brief Description]: [document link] (link the PDF, not the summary page) I'll copy...

So, as you may have noticed, I've been kind of obsessed with the Nike Smoke recently. I was wondering if it would be allowed, if proper safety precautions are followed, to launch a (problably around 1/3) scale near minimum diameter Nike Smoke (at a research launch, far away from civilization)...

I'm (planning on) building a 1/2 scale SA-14 Archer by North Coast Rocketry (2.6in. Version) and I'm looking for (mainly) the fin and strake dimensions. (Also some other stuff.) I like the looks but I don't think I'll venture past Es... yet. Sorry about your feet. Didn't mean to squish them...

List all the tips that don't work. You don't have to have tried them... These could just be rephrased mistakes or accidents.