Stratolaunch approaches

 aircraft, Hmm..., news, projects, rockets, spacecraft  No Responses »
Jan 102019
 

Stratolaunch airplane nears first flight

On Jan 9, the giant Stratolaunch plane did a taxi test that reached a top speed of 219 kilometers per hour (137 mph), and the nosewheel rotated off the ground. Flight tests probably aren’t far off.

I remain a little baffled about the business plan for Stratolaunch, especially since the initial payload is apparently supposed to be *three* Pegasus XL launch vehicles. That eems an odd thing to do. But Stratoluanch intends to eventually build their own better-optimized expendable and reusable launch vehicles. And the more launchers, the better.

 Posted by at 3:02 pm

Bell VTOL”Taxi”

 aircraft, art, news, projects, youtube  No Responses »
Jan 082019
 

Bell has unveiled their idea of what an electric intra-city VTOL “taxi” would be, in the form of the “Nexus” AirTaxi. one wonders if it’s more human than human?

Bell reveals the ‘Nexus’ VTOL

On one hand, it bears more than a passing resemblance to the Bell X-22. On the other hand, there are some design choices there that make me scratch my head. The thrust from forward ducts would be bisected by the main wings at forward tflight and then blast right into the rear fans. During transition, the forward thrust would be disrupted by the main wings, which would seem to lead to some fantastic turbulence.

 Posted by at 8:28 pm

Space Station concept art

 art, history, nukes, Patreon, projects, rockets, spacecraft  No Responses »
Jan 032019
 

Two pieces of NASA-marked (but likely not NASA-produced) concept art from the 1960’s depicted artificial-G space stations.

 

The first station (previously presented here in black and white not so long ago) depicts a substantial three-armed station witha multi-segment spine and three habitats. At one end of the spine is a nuclear reactor and its radiator; at the other end is a presumably rotationally0decoupled docking section. There is also an external “track” with two cars seemingly to provide transport from one habitat to another; it doesn’t really seem like this would provide a substantial improvement in transport over simply taking an elevator from one hab up to the spine and then down another elevator to the destination hab.

This space station, which appears from the art style to be a Grumman design, is a single-launch space station to be launched atop a Saturn V. The two arms would fold back for storage on the launch vehicle and would deploy once in orbit. An Apollo CSM is shown approaching for docking along the centerline; it’s not clear if the docking cone was rotationally decoupled. if it was not, the two Apollo-like capsules hanging off the sides of the cone are a bit of a head scratcher.

Both renderings have been uploaded in their full resolution to the 2019-01 APR Extras dropbox folder. This folder is available to APR Patreon Patrons and APR Monthly Historical Documents Program subscribers at the $4 per month level and above.

 



Details below.

 Posted by at 11:03 pm

Raider, the early days

 aircraft, art, history, projects  No Responses »
Dec 292018
 

Sikorsky is currently flying the S-97 “Raider” helicopter featuring the ABC (Advancing Blade Concept) rotor. ABC rotors look like conventional coaxial rotors, but differ in being structurally stiff and inflexible. The idea is that ABC rotors allow faster flight: in a conventional single-rotor helicopter, the faster airflow means that on one side of the rotor disk, the “advancing blade” slams into the air at a very high speed, potentially generating a lot of lift. But on the other side of the disk, the “trailing rotor,” which is moving aft at a speed not far off from the airflow, generates very little lift. This of course imbalances the aircraft and limits forward speed. The ABC system, by having coaxial rotors, make sure that there is always balanced lift. The S-97 is not the first helicopter that Sikorsky has built with ABC rotors; the S-69 flew in the 1970s, reaching a top speed of 260 knots. But it suffered from serious vibration issues and did not lead to a production aircraft. The S-97 seems to have fixed most of the issues, and it is hoped that a production contract may eventually come.

The ABC concept dates back *at* *least* 52 years. Below is an illustration from 1966. Interestingly this design more closely resembles – at least superficially – the S-97 than the S-67. The S-69 used two turbofan engines to provide forward thrust, while the S-97 used, like this illustration, a pusher propeller.

 

 Posted by at 11:13 pm

SPS Launchers: A Collection

 art, awesomeness, history, Hmm..., models, projects, rockets, US Launch Vehicle Projects  No Responses »
Dec 272018
 

Continuing to rough out some Heavy Lift Launch Vehicle CAD models. Instead of lumping them all together I’m breaking them into “genres,” partially because my computer is starting to balk at the the size of the full collection. Below is the “Solar Power Satellite Launchers” collection. Included, from left to right, Rockwell Star Raker, Boeing TSTO, Boeing “Big Onion” SSTO, Saturn V, NASA Personnel Launch System ( a Shuttle derived design), Boeing Space Freighter, NASA-JSC HLLV. There are a few more designs that could probably be added to this collection. Suggestions?

As previously indicated, there is a good chance of a 1/288 scale model of some of the designs such as the Saturn V and the Star Raker. But *all* of them? Probably not in that scale. What seems reasonable is something akin to the old Monogram “missile collection” kits, with all of the HLLVs in something like 1/500 or 1/700 scale. A similar collection of Nova/Post-Saturn boosters is possible.

The Space Freighter would be substantially impressive in 1/288… but really rather enormous.

 Posted by at 5:04 pm

Northrop artificial-g space station art

 art, history, projects, spacecraft  No Responses »
Dec 262018
 

A piece of concept art circa 1960 depicting a Northrop concept for a space station. Not much to say about it as there are no good scale references, nor do I think I have anything else depicting the station. It is, however, not dissimilar from a lot of other space station concepts of the time… replace the four “habitat” cylinders with a single torus, and this would be pretty much every space station from the Colliers series until the Manned Orbital Space Station concept from the early 60’s.

 Posted by at 11:04 pm

APR Historical Documents: December 2018

 aircraft, APR, awesomeness, drawings, history, new products, Patreon, projects, rockets, spacecraft  No Responses »
Dec 242018
 

2018-12 Rewards are now available for downloading for APR Historical Documents subscribers. This month the rewards include:

1: A large document: “Sea Launch and Recovery of Very Large Rocket Vehicles,” a 1962 Aerojet report on the sea Dragon concept

2: “Ryan Aeronautical Company Plane Portraits,” information, photos and three-views of a sizable range of Ryan aircraft, manned and unmanned

3: “Nova,” a blueprint of the NASA “Saturn C-8” launch vehicle with 8 F-1 engines

4: CAD diagrams: Star Raker scrap views

If you are interested in signing up, you can do so either at Patreon or directly through PayPal. Signing up now makes you eligible for rewards starting with the *next* months rewards. The directly-through-PayPal system is new; it would probably be best to sign up after the first of the month.

 Posted by at 6:16 pm

That’s a lotta rockets

 art, history, models, nukes, projects, rockets, spacecraft  No Responses »
Dec 222018
 

There are a vast number of heavy lift launch vehicles that have been designed over the years, but I think I’ve captured a pretty good selection here. Two of them, the Douglas ROOST and the Martin RENova, are depicted with their recovered configurations, but if models were made these options would likely not be included. They were done for future diagramming purposes. All of the models here are pretty basic, missing a whole lot of detail; I put these together quickly to check out scale and judge interest.

 Posted by at 1:57 am

APR Monthly Historical Documents Program

 aircraft, APR, art, drawings, history, Hmm..., new products, news, Nuclear Pulse Propulsion, Patreon, projects, rockets, spacecraft  No Responses »
Dec 182018
 

For some years I have been operating the “Aerospace Projects Review Patreon” which provides monthly rewards in the form of high resolution scans of vintage aerospace diagrams, art and documents. This has worked pretty well, but it seems that perhaps some people might prefer to sign on more directly. Fortunately, PayPal provides the option not only for one-time purchases but also monthly subscriptions. By subscribing using the drop-down menu below, you will receive the same benefits as APR Patrons, but without going through Patreon itself.



Details below.

Continue reading »

 Posted by at 6:10 pm

Making the Saturn V look small

 art, awesomeness, history, Hmm..., models, projects, rockets, spacecraft  No Responses »
Dec 172018
 

Below are some renders of a number of 3D CAD models of launch vehicles. Most are currently extremely basic… accurate to size and shape, but lacking details. The intent on most of them is to use them for diagramming purposes… but the possibility exists of using them as the basis for 1/288 scale display models. To that end they would probably be designed for simplicity and low parts count rather than complexity and the ability to display them with stages separate.

As can be seen, a lot of them make the Saturn V seem fairly puny. From left to right: the Boeing MLLV in its most capable form, fully stretched with a dozen 260-inch solid rocket boosters; Aerojet Sea Dragon; Rockwell Star Raker; Boeing “Big Onion” SPS launcher; Martin T10RR-3C Nova/Post-Saturn booster; early Nova “Saturn C-8;” Saturn V; Soviet N-1; Block 1 SLS; Block 1b SLS; New Glenn (scale estimated because the dimensions given for lengths and diameters don’t match up with renderings of the New Glenn).

Keep in mind, *all* of these were or are seriously considered by aerospace engineers based on the requirements of the launch market as they were then understood. Today, the markets to support these, with the possible exception of the New Glenn, simply don’t exist. But back when the Apollo program was still growing, the rocket designers of the time were seemingly convinced that the market for stuff being put into space was only going to grow exponentially.

If you might be interested in any of these as a model kit, let me know.

 Posted by at 3:03 am
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