Category Archives: engines

RD-180 Engine Diagram

This is a bit different from the NK-33 done previously, but it’s still a full flow oxidizer rich staged combustion lox-kerosene engine. It has no gears and no flexible shaft coupling between the pumps like the NK-33, making it a … Continue reading

Posted in engines, industry, Models, RLV:s | Tagged , , , , | 3 Comments

The US Air Force Tries To Do Reusables

But is not a real RLV program. It’s just a narrow test for one technology. Hence I think naming it Reusable Booster System Pathfinder is misleading. Overspecification They overspecify the problem by requiring a glide landing. Why is it superior … Continue reading

Posted in airplane, Architecture, engines, industry, Models, Motivation, RLV:s | Tagged , , , , | 2 Comments

The Martin Jetpack and Its Design Tradeoffs

[youtube=http://www.youtube.com/watch?v=kLccl_NWDQE] Here’s the technical information. It uses a piston engine to spin two smallish propellers. At first look it seems inefficient: the propellers are so small (diameter 1.7 ft so radius is 0.26 m) so the air mass flow is low … Continue reading

Posted in airplane, engines, Motivation, Science Links, Transportation | Tagged , , , | Leave a comment

NASA's Rejuvenation

I do appreciate that the model is so different from Apollo that it takes time and thought to understand what it is about; I did not see it at first myself — but once I got past my preconceptions, I … Continue reading

Posted in Architecture, engines, industry, Motivation, NASA, RLV:s, Science Links, Spacecraft | Tagged , , | Leave a comment

A Small Step for Rocketry

“Rockets are special” is an interchangeable meme with “rockets are expensive”. Well, hopefully they get less special. Armadillo’s been making progress, from the latest update: For the very first time, a complete system was operated without the presence of any … Continue reading

Posted in airplane, engines, industry, RLV:s | Tagged , | Leave a comment

Dual Propellant Expander

Or what you are going to call it, an unrealized proposal from Aerojet around 1984. PDF Found on NTRS. The idea was to have two turbopumps (like on SSME), but instead operate on the expander cycle. Two heat exchangers, two … Continue reading

Posted in Architecture, Depot, engines, industry, ISRU, Lunar, NASA, RLV:s, Spacecraft, Transportation | Tagged , , , | Leave a comment

The Sandman

Posted in engines, industry, RLV:s, Transportation | Tagged , , , | Leave a comment

NK-33

It seems to be such a marvelous rocket engine. A high thrust to weight, high ISP high tolerance design that is still top of the line after sitting forty years in storage – it will be used for Orbital’s Taurus … Continue reading

Posted in engines, industry, Motivation, Uncategorized | Tagged , , , , , | 14 Comments

Masten

[youtube=http://www.youtube.com/watch?v=z3wdeDJtYf0&feature=player_embedded#t=227] Made huge strides in the last few days. A half-L1 done. They might be able to compete with Armadillo on L2, though I’m somewhat skeptical since they’re only going to assemble the new L2 vehicle soon. Suddenly looks like … Continue reading

Posted in engines, Motivation, RLV:s | Tagged , , , , , | Leave a comment

Airline vs Spaceline Safety

62 mile club has a writeup of a beta “customer qualification program” for XCOR’s Lynx suborbital craft. This highlights the differences and current state of play. Rocketships will not be as safe as airliners in the near future, and they … Continue reading

Posted in Architecture, engines, Homebuilt, industry, RLV:s, Suborbital, Transportation | Tagged , , , , , , | 1 Comment