Aerospace Projects Review Blog – Page 121 – Unbuilt aircraft and Spacecraft Projects

Curtiss-Wright XP-71

Aug 112012

The XP-71 was a sizable Curtiss-Wright design from 1941 for a long range escort fighter. Irritatingly little has been publicly revealed about it. This is assuredly not due to the XP-71 being such an incredibly advanced design (although it was incredibly complex), but rather due to it having been a failed concept. Armed with two 37mm and one 75mm cannon, the XP-71 was bigger and substantially more expensive than a medium bomber such as the B-25, and would likely have been less nimble than a smaller fighter. While the armament would have packed a mighty whollop, targeting an Me 109 or a Zero would have been a matter of great luck or incredible skill. The XP-71 effort lasted from 1941 to 1943.

While I’ve recently been clued in on a Curtiss-Wright report with some good drawings of an oddly swept-wing version of the XP-71 (release of further info currently embargoed), very few decent quality drawings seem to have been released. One of the very few “official” three-views is a rather small diagram from a NACA report describing a great many spin-tests. I’ve not yet located the specific test reports dealing with the XP-71.

Convair Triamese

launch vehicles, rockets, space shuttle, spacecraft 1 Response »

Aug 072012

A 1969 Convair concept for a space shuttle. The Triamese used three vehicles that shared outer mold lines and many components… two as boosters, a third as the orbiter. The orbiter would have more complex rocket engines, featuring extendable nozzles for improved high altitude performance. All three included cockpits, relatively small high aspect ratio wings that would be stowed internally and flip out for landing, and flip-out turbofans for re-entry cruise and go-around capability. Numerous variants were studied including biamese versions using dissimilar boosters and orbiters.

NASA NERVA art, 1963

launch vehicles, nukes, rockets, spacecraft No Responses »

Aug 052012

A 1963-vintage NASA illustration of the NERVA nuclear rocket engine. This is schematic only, depicting the main components of the nuclear engine. Not labeled are the two vernier thrusters; these take the otherwise wasted hydrogen exhaust from the turbopump and direct it more or less aft for some additional thrust. Further, they could, unlike the main engine, gimbal; this would provide a measure of thrust vectoring.

D188A Artwork in Hi-Rez

bomber, fighter, hi-rez, VTOL No Responses »

Aug 022012

A Bell Aircraft illustration of the D188A VTOL strike fighter. This design was described in detail in Article 34, available for both download and printed.

You can download a 5.5 megabyte version of this diagram; the link is HERE. To access it, you will need to enter a username and password. The username: the first word in the body of the text on page 6 of APR issue V1N4. The password: the first word in the body of the text on page 14 of the same issue. Note that both are case sensitive.

Boeing 733 artwork

jetliner, transports No Responses »

Aug 022012

An artists impression of one of the fairly vast number of SST designs put forward by Boeing under the designation “733,” which predated the “2707” designation. This one features angular delta wings and delta canards… and apparently no passenger windows. Dates from the early 1960’s.

Martin-Bell Dyna Soar artwork

Dyna Soar, hypersonic, launch vehicles, research, rockets, space shuttle, spacecraft, spaceplane No Responses »

Jul 302012

A reproduction of admittedly dismal quality of a Martin Co. painting of their December 1958 Dyna Soar configuration at launch. This configuration, the product of a team-up of Martin and Bell, competed against Boeing (and other companies) and lost; what must have been grating for the Martin-Bell folks was that the Boeing design that won looked nothing like the final Dyna Soar design… which actually looked a whole lot like this vehicle.

The Dyna Soar is here being shown launched by a modified Titan I ICBM. This booster would have fallen far short of orbiting the Dyna Soar; instead it would have simply tossed it on a long hypersonic suborbital trajectory. This would have been a purely experimental aircraft, the natural follow-on to the X-15.

F-111 evolution part 3

bomber, fighter No Responses »

Jul 282012

A three-view of the April 1962 configuration of General Dynamics’ TFX entry. This is very clearly the F-111, but with a few minor differences. The most obvious are the different inlets and the tail “cone.” Here, it appears that at least for the USAF version, the tail cone was meant to angle downwards… presumably forming a ventral fin to aid in stability (or perhaps aid in maneuverability).

Other design features that would change include the profiles of the dorsal and horizontal stabilizers.

F-111 evolution part 2

bomber No Responses »

Jul 252012

While the December 1961 configuration of General Dynamics’ TFX proposal was quite different from what was actually built as the F-111, the April 1962 configuration was quite close, though still not final. This diagram shows both designs. The most obvious changes are for positioning of the wings further forward, and the substantial increase in size of the horizontal stabilizers.

F-111 evolution

bomber, fighter No Responses »

Jul 232012

The F-111 was one of those aircraft for which a *vast* number of designs were put forth. While General Dynamics won the contract, they went through a long design development for their final design. As of December 1961, the design was clearly *almost* the F-111 as it would eventually be built, but not quite:

LHX Structural Arrangement

VTOL 1 Response »

Jul 212012

An early Bell Helicopter LHX concept:

Clearly Bell had Kevlar on their mind.

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