This gives you the main dimensions of the spacecraft, its surface area and volume capacity, perhaps along with constraints such as maximum load and drive acceleration. I used it for my battleship-era warship specification sim, Spring Style, and it is retained by its independent offspring, Spring Sharp.But for deep space craft it is seriously misleading.Japanese yen - Wikipedia https://en.wikipedia.org/wiki/Japanese_yen The yen (Japanese: ? Japanese Yen Exchange Rates - Yen (JPY) Currency Converter ... United States Dollar to Japan Yen com/currencyconverter/convert/?fx-rate.net/JPY Japanese Yen exchange rates and currency conversion. Track Yen forex rate changes, track Yen historical changes. Amount=1&From=USD&To=JPY USD to JPY currency converter. Get live exchange rates for United States Dollar to Japan Yen.There are no girls, and the boys are sketchily characterised compared to his later books.Also we have an adult directing everything—a mad scientist, admittedly, but still an adult.
Heinlein wrote it quite quickly, and really he taught himself how to write juveniles from the experience.
I decided it was more logical to mine five thousand miles up. Government first with my proposal for asteroid capture and mining.
Some of the asteroids are ninety percent metals; what we needed to do was bring them into Earth orbit. I had full estimates of costs and probable return on investment, and I would have settled for a five percent contract fee.
Ships and aircraft, says Captain Obvious, move through a fluid medium that shapes and constrains their design. Their overall design constraints are more architectural: supporting the craft against its own thrust, along with stresses from attitude change maneuvers, the thump of docking, thermal flexing, spin loads, and the various other kinds of abuse that spacecraft are subject to.
This is as good a time as any to point you to the pages on basic and advanced design.