Scaled Composites ATTT (Advanced Technology Tactical Transport) aka AT3

Hi,

The Scaled Aircraft Composites designed and Beech built the UTT; it was a medium-
size utility transport test aircraft with two tandem high-wings and twin turboprop
engines,I have no drawings to it.
anther Beech little known aircraft was PD.208 which developed from Model-99.

The PD208 was a jet systems testbed using a Super King Air and JT15 (I think that was the engine...the one from the Citation 500) engines replacing the turboprops and exhausting over the wings.

The Scaled Composites Model 33 was the tandem wing 68% scale proof of concept vehicle as the ATTT (Advanced Technology Tactical Transport). Was the UTT you speak of a different aircraft?

The UTT was covered to some detail in an issue of Popular Mechanics from the early 90s as for the other Beech CAS, I have never seen any photos of it.

hesham said:

Hi,

The Scaled Aircraft Composites designed and Beech built the UTT; it was a medium-
size utility transport test aircraft with two tandem high-wings and twin turboprop
engines,I have no drawings to it.
anther Beech little known aircraft was PD.208 which developed from Model-99.

Click to expand...

I've seen pictures of the UTT, it somewhat resembles a tandem wing version of the "CV-10" transport, but with a single vertical tail. The original fuselage had a neat boattail but it was redesigned to add an aft loading door.

In my opinion, one of the most beautiful prop aircraft ever produced. If anybody has more information, please post it here.

The original ATTT (Advanced Technology Tactical Transport), airplane enthusiasts, you might want to look away... Very sad photo's...







Of course, the Russians had a similar design in mind... The Sukhoi S-80 Google shows more images, including a few nice scale-models.

The Scaled ATTT (also seen as AT3) was flown in two different configurations. First as Model 133-3-62 with a conventional tail section with cruciform tailplanes. First flight 29 December 1987. Later in the test programme small endplates were added to the horizontal tail. During 1989 it few again as Model 133-4-62 with the twin tail booms. Engines were two 850hp P&WC PT6AS-135A end registration was N133SC.
In original form wingspan was 53.208ft, length 44.854ft and height 14.075ft. Internally the project was referred to as SMUT (Special Mission Utility Transport). It was an approx. 62% scale technology demonstrator for a planned ATTT -Advanced Technology Tactical Transport and some money may have come from DARPA - Defence Advanced Research Projects Agency.

From Scaled Twitter feed

Don't think I've ever seen the T-tail AT3 before. Not the most elegant-looking version to be sure.

flateric said:

From Scaled Twitter feed

Click to expand...

SRS Technologies ATTT Report

Cleaning out some old boxes in the basement of paper files from my Lockheed days. In mid-1987 Lockheed (Lockheed - Georgia Company) teamed with Beech to look at developing the DARPA-funded Scaled Composites (at that time a subsidiary of Beech) ATTT into a practical small tactical transport. I will try to scan some of the drawings of some conceptual designs. Early in the process, Lockheed did a quick parametric design study to see how a conventional-wing-configured design compared to the ATTT-style tandem-wing layout. A quick scan of the notes indicates the conventional design came in about 5% heavier, but even that was disputed because after-the-fact Beech noted their design was sized for takeoff and landing performance at sea level standard day, while Lockheed (following standard practice) sized the conventional configuration for takeoff and landing performance at an airfield 2000 feet above sea level, ISA + 15 degrees Celsius.

Saw this at Edwards back in March, being stored at North Base for eventual display at the new Flight Test Center. Construction is underway just outside the main base entrance. Maybe they'll complete the building one of these days and the airframe will be restored.

Enjoy the Day! Mark

This, Saber Warrior...the three prong (fuselage) design seems more popular...