72" wingspan
62" long

Something else that I am thinking about printing.

America's First Turboprop...And It Sucked: Consolidated Vultee XP-81 (22 min 15 sec)

I was thinking that I would be creating to much information about 3D printing into the Electric Ducted Fan Jet Talk forum so I decided to create another discussion into my blog.

Fell free to post your comments.

Started doing another 3d printed Vulcan using two 50 mm edfs. Wing span is 40", retracts, elevons and rudder.

3D print with ABS
60" WS
CR 12 x 8" props.
Main airfoil MH-200
Canard airfoil MH-201

Another what if project.
Completion date: unknown
First I will simulate in XFLR5 to see how well it will fly. Then more testing with different components.

This is a remix of Dirty Dee's 1/10 Scale Horten IX Ho-229
Original Specifications:
Wingspan: 1680mm (66 in)
Length: 748mm (29.4 in)
Wing Area: 51.6 dm2 (800 in2)
AUW: estimated 2500-2900g (88-102 oz)

Modified Specifications:
Wingspan: 2506mm (98.7 in)
Length: 1110mm (43.7 in)
Wing Area: 102 dm2 (1588 in2)
AUW: estimated 288 oz (18 lbs)
Wing Loading 16 oz./sq.ft.
Cubic Loading 7.9

Scaling this plane up was a challenge. Mesh to solid conversions takes allot of memory so editing was slow. Scaling up caused the walls to increase to 1.2mm which caused two wall prints with an airgap in between using a .4mm nozzle. Increasing flow rate allowed the walls to come together but not to totally bond together. Walls were to close for infill under 20 percent outline overlap. Increasing the flow rate causes the mating receptacles to have to much interference with the adjoining sections, So most of them were made into joggles or removed. Since the skin is 2 walls causes the fuselage sections to buckle in long flat areas while printing, so longerons were placed in these areas. The first section were the left side and the fixes are on the right side. Left sides were repaired and used. All spar receptacles were resized to fit standard CF tubes.

The plan is to use 2ea 90mm EDF's? The original exhaust ducts were edited out and new ones made. This exhaust is 80mm and the last 6" was tapered to 71mm.

6.5 kw TP Power 5850 (720 KV) KV may be to high
15k rpm
100 N static
80 N @ 60 m/s
Blades will be printed with polycarb filament
Hub is 6061 Aluminum

Towards the end of 1940, the Lockheed Aircraft Company believed that a radical new approach was required to produce a fundamentally different aircraft. The company wanted to build a fighter that had such an advantage in speed and altitude that nothing made by any other country could touch.

Among their many talented engineers was Nathan Price, a designer that developed a steam turbine driving a propeller that powered and flew a Travelair Biplane in 1933 before he started working at Lockheed. He continued to develop the concept that eventually led to a gas-turbine jet-propulsion engine. More people were added to the job of working out the details of this engine and of course an airframe to put it in. Finally a formal proposal was made to the Army Air Corp in February 1942.

It described a Mach 0.94 aircraft capable of flying at 50,000 ft. The L-133 was to be a canard single seater aircraft powered by two of the L-1000 axial-flow engine. It length was to be 48 ft. and 4 in. and a span of 46 ft. 8 in. Armament was planned to be four 20 mm cannons concentrated in the nose. Besides it speed other unique concepts were boundary-layer control and reaction thrust roll control. Rather than be impressed the Air Corp. was nearly horrified. It told Lockheed to stop wasting time and to build more P-38 Lightings. At this time period and because of their lack of experience, the American military planners were still thinking that defending aircraft would be fighting incoming bombers at...Continue Reading

This 1941 aircraft design was to be a possible successor to the Messerschmitt Bf 110 heavy fighter. Although of a unusual configuration for that time, there were advantages (and disadvantages) to its rear wing/forward canard construction.
The Hs P.75 featured a tapered fuselage, with the slightly swept-back wings being mounted mid-fuselage and set back to the rear of the aircraft. The widened fuselage was designed to house the Daimler Benz DB 610 engine, which were two DB 605 engines joined side-by-side, just aft of the cockpit. These were the same engines that the Heinkel He 177 used, and were found to be prone to overheating and catching fire.Due to this development, they were changed in 1942 to the liquid-cooled, 24 cylinder Daimler Benz DB 613 engines (two coupled DB 603s) that produced 3500 horsepower. Both engine configurations were to drive contrarotating propellers (to offset tourque) of a 3.2m (10' 6") diameter via an extension shaft. There were a pair of swept-back canards located on the nose of the aircraft, that were to serve the purpose of elevators. The vertical tail unit was mounted beneath the fuselage, so that it could act as a tail bumper upon takeoff so that the propellers would not strike the ground. Since the propellers were located at the rear in a pusher configuration, a tricycle landing gear arrangement was chosen. Fuel was contained in three tanks, one in each wing and one behind the cockpit. A single pilot sat in the cockpit which was...Continue Reading