Oddball, Experimental, or One-off

[BrendAn]

IAS is not the speed of the air over the wing. TAS is the speed of the air over the wing.

Example: You are flying at 130,000 feet with only 3 air molacules per square centimeter at a TAS of 1,000 kts. You fly past a point in the air marked by a floating balloon.

With everything staying constant for one hour the balloon will be 1,000 nautical miles away and the whole time the airspeed indicator will have read 1 or 2 kts. The air molacules go over the wing at a velocity of a 1,000 kts (TAS) but the difference in pressure with only 3 molacules per square centimeter give a very low indication (IAS).

[BrendAn]

Just now, BrendAn said:

IAS is not the speed of the air over the wing. TAS is the speed of the air over the wing.

Example: You are flying at 130,000 feet with only 3 air molacules per square centimeter at a TAS of 1,000 kts. You fly past a point in the air marked by a floating balloon.

With everything staying constant for one hour the balloon will be 1,000 nautical miles away and the whole time the airspeed indicator will have read 1 or 2 kts. The air molacules go over the wing at a velocity of a 1,000 kts (TAS) but the difference in pressure with only 3 molacules per square centimeter give a very low indication (IAS).

plenty of info on google but seems to be a lot of differing views on what is correct. unusual for the internet.

[Thruster88]

21 minutes ago, Marty_d said:

Is True airspeed indicated on any instruments or just calculated / shown on GPS?

 

(Not that it's going to make much difference in a 701 😆)

 

 

Any EFIS with a temperature probe or old style ASI with the movable temperature and pressure sub scale will show true airspeed. 

[Red]

TAS is a calculation, it's can't be directly measured.

As far as the aircraft is concerned it always experiences Forces relative to its indicated airspeed.

[BrendAn]

My buddy the U-2 pilot points out that during much that turns put one wing in mach buffet and the other in stall buffet.

 

this is interesting. 2 types of stall at the same time.

[skippydiesel]

I don't think having the theory back to front,  will worry me and my Sonex too much up to 10,000 ft as long as I keep my speed below 130 knots on descent 

[BrendAn]

1 hour ago, skippydiesel said:

I don't think having the theory back to front,  will worry me and my Sonex too much up to 10,000 ft as long as I keep my speed below 130 knots on descent 

i don't think you do have it back to front from the stuff i read

[red750]

The American Gyro AG-4 Crusader is a small twin engine aircraft. The aircraft was designed as the Shelton Flying Wing in 1933 by Thomas Miles Shelton.

 

The AG-4 was developed using wind tunnel tests. The American Gyro AG-4 Crusader is an aluminum skinned four place low-wing twin engine aircraft with fixed conventional landing gear, twin tail booms with individual rudders, and a teardrop shaped fuselage. The wing uses trailing edge flaps and 25 gallon fuel tanks are mounted in each wing root. Retractable landing gear were also tested on the model.

 

The prototype was painted a copper color with green leather seats. It was tested in 1935 at Denver Colorado. The aircraft was funded from stock issued in the Crusader Aircraft Corporation, a parent of the American Gyro Company. The company folded in 1938 under securities fraud investigations before the Crusader could go into production.

 

[red750]

The LaFlamme Helicopters is a kit built twin rotor  helicopter designed for home assembly.

 

Description
FUSELAGE: Composite materials: Fiberglass and urethane foam; Monocoque: 24’x 2.5’x 6′

ENGINE: 230~350 h.p. (See Horse power rating)

ROTORS: Rigid type, 3 blades each; 260″ in diameter

SEATS: Tandem: Pilot and co-pilot

CRUISING SPEED: 140 mph

EMPTY WEIGHT: 1775 lbs.

GROSS WEIGHT AT THE TAKE-OFF: see Horse power ratings – 2200 to 3500 lbs.

PROPOSED KIT PRICE: 47,000 $ US

 

The kit
List of parts included in a kit: Fuselage, engine covers, rotor heads, blades, transfer case, seat frames, canopy contour.

List of parts not included : Engine and accessories, instrumentation, drives shafts, main transmissions (differential) , controls, hardware.

Estimation price of parts not included : 10,000 $ U.S. Workman hours : 800 hrs.

 

For further details, click here.

 

[skippydiesel]

17 hours ago, red750 said:

The American Gyro AG-4 Crusader is a small twin engine aircraft. The aircraft was designed as the Shelton Flying Wing in 1933 by Thomas Miles Shelton.

 

 

Wow! Love the styling. Looks like it might be fast. Strange that they went to so much trouble to make it look streamlined and then had no propeller spinners. Any idea of the performance and engine hp

[onetrack]

Interesting concept, the LaFlamme twin-rotor homebuilt helicopter - but quoting US$47,000 and 800 hrs for a complete build has to be the best aviation under-estimation I have seen in some time!

 

Add in the fact that the builder could never find any takers to support his ideas - and talking about Ford V6 power, whilst showing a Buick V6 engine! - kind of makes you wonder about the accuracy of all that he describes!

 

Les Helicopteres Laflamme LAF-01

WWW.REDBACKAVIATION.COM

---

An interesting tandem helicopter that could have made its mark in the kit helicopter world, but struggled and re-tooled for commercial drone usage.

 

[Marty_d]

It also said "Rotors:  3 blades each" while in the top pics at least, my Mk.1 eyeball clearly tells me there's 2 blades each.

Bottom one shows 3 blades and a different rego / colour scheme - so they made at least 2.

[red750]

The Ayres LM200 Loadmaster was a small cargo aircraft developed in the 1990s by Ayres Corporation largely for the needs of small-package carriers. In 1996, urged on by Federal Express, development was begun, designed to carry four demi containers. The aircraft was to be powered by a LHTEC CTP800-4T turboprop, which was composed of two CTP800s driving a single five-bladed Hamilton-Standard propeller through a combining gearbox. To support this development effort, Ayres acquired the LET aircraft manufacturing company in the Czech Republic in September 1998. In 2001, the company was forced into bankruptcy when creditors foreclosed on it, and the Loadmaster program was terminated.

 

[Marty_d]

Looks like a Lego plane.

[facthunter]

It's designed specifically to carry a certain size cargo container. Nev

[red750]

The Boeing Model 360 is an American experimental medium-lift tandem rotor cargo helicopter developed privately by Boeing to demonstrate advanced helicopter technology. The aircraft was intended as a technology demonstrator, with no plans to put the type into production, and many of its design features were carried onto other programs including the RAH-66 Comanche and V-22 Osprey. The sole prototype has been preserved and is a static exhibit at the American Helicopter Museum in West Chester, Pennsylvania.

 

[BrendAn]

Edited July 18 by BrendAn

[BrendAn]

stealth bomber

[red750]

The Campbell Model F, a pusher configuration, two seat sport aircraft built in the 1930s, was unconventional in its day with its empennage on twin, slim booms, a cockpit under stepless, rounded, multi-panel glazing and a tricycle undercarriage.

 

The Model F first flew in 1935, though the exact date is unknown. By 1937, if not earlier, it was making demonstration flights including one from Bolling Air Force Base. It was damaged in another demonstration and was not repaired.

 

For details of development and design, click here.

 

 

[red750]

The Loire-Nieuport 10 was a 1930s French prototype long-range maritime reconnaissance and combat floatplane produced by Loire-Nieuport, a joint venture between Loire Aviation and Nieuport-Delage. It was an attempt to answer the requirements for the Navy's programme Hydravion éclaireur de combat ("Combat reconnaissance seaplane") for a large floatplane capable of acting as a torpedo bomber or reconnaissance aircraft.

 

Design of the Loire-Nieuport 10 started in 1937, with the resultant aircraft being a twin-engined monoplane of all-metal stressed-skin construction with inverted gull (or W-shaped) wings. It was powered by two Gnome-Rhône 14N radial engines mounted above the wings, with the twin large floats on pylons under the wing, directly beneath the engines. The deep fuselage accommodated a crew of six, with pilot and co-pilot seated in tandem, while a glazed nose was provided for the bomb-aimer/navigator. Defensive armament was a machine gun in the nose, with another firing through a ventral hatch, and a 20 mm cannon in a dorsal turret, while it could carry two torpedoes or 1,200 kg (2,700 lb) of bombs in an internal bomb-bay.

 

[red750]

The Curtiss XF15C-1 is a mixed-propulsion fighter prototype of the 1940s. It was among a number of similar designs ordered by the US Navy before pure-jet aircraft had demonstrated their ability to operate from carriers and the mixed-propulsion designs were abandoned. Only three prototypes were constructed, the first one having crashed in testing while the second was scrapped and the last survives to this day.

 

By the late 1940s, the United States Navy was interested in the mixed-power concept for its shipborne fighters. Jet engines of that era had very slow throttle response, which presented a safety concern in the case of a missed approach on an aircraft carrier as the aircraft might not be able to throttle up quickly enough to keep flying after leaving the end of the deck. This led to orders for a number of mixed-propulsion fighters, including the FR Fireball.

 

As such, an order was placed with Curtiss on 7 April 1944 for delivery of three mixed-power aircraft, designated the F15C. Powered by both a 2,100 hp (1,566 kW) Pratt & Whitney R-2800 Double Wasp propeller engine, and an Allis-Chalmers J36 turbojet, the aircraft was in theory the fastest fighter in the US Navy at that time.

 

The first flight of the first prototype was on 27 February 1945, without the turbojet installed. When this was completed in April of the same year, the aircraft flew several mixed-power trials, however on 8 May, it crashed on a landing approach. The second prototype flew for the first time on 9 July 1945, and was soon followed by a third prototype. Both aircraft showed promise. However, by October 1946, the Navy had lost interest in the mixed-power concept and cancelled further development.

 

[facthunter]

 Suited the times Early jet engines didn't have much thrust.  Neptunes were mixed power but the jet engines used the fuel up fast. They used the same fuel. AVGAS.130/145.

[red750]

The SNCAC NC.2001 Abeille (English: Bee) was a single engine, twin intermeshing rotor helicopter designed and built in France in the late 1940s. Three were completed but only one flew, development ending when SNCAC was closed.

 

The design of the Abeille was directed by René Dorand at the helicopter division of SNCAC. An intermeshing rotor layout was chosen instead of a tail rotor design, following the examples of the 1939 Flettner Fl 265 and the Kellet XR-8 of 1944. Its twin, two blade rotors were driven by shafts which leaned out of the fuselage side-by-side. The rotor blades, which began some way from the hub, tapered strongly. Pitch and roll were adjusted from the control column by altering cyclic pitch via a pair of swashplates and yaw by changing the relative collective pitch of the two rotors with the pedals. Forward tilt of the rotor shafts was automatically linked to forward speed. A single lever controlled both the collective pitch and the throttle through an electrical link. The Abeille was powered by a 429 kW (575 hp) Renault 12S, an inverted, air-cooled V-12 engine.

 

The Abeille had a pod and boom, all-metal fuselage. The nose was fully glazed with two side by side crew seats ahead of a cabin with a bench seat for three passengers. The engine and gearboxes were behind them. Aft, a high mounted boom carried the empennage, which on the first prototype consisted of a tall T-tail with a narrow fin. On the second machine the tailplane was lowered to the top of the fuselage and had a pair of fins at its extremities, each roughly elliptical and mounted from its top.

 

The tails was wooden, with fabric covered. The Abeille's fixed main landing gear had two wheels on a single axle positioned a little behind the rotor shafts and mounted on broad, single struts to the mid-upper fuselage, together with a smaller nose wheel.

 

Three examples of the Abeille were built. The first was destroyed by fire before it had flown. The second made its first flight on 28 June 1949, piloted by Claude Dellys. SNCAC was closed in that month, its assets distributed between three remaining state owned firms and as a result the Abeille programme was abandoned; the second machine did not fly again and the third never flew.

 

[red750]

Claude Auguste Joseph Givaudan's iconic and weird aircraft

 

The French engineer Claude Givaudan (1872-1945) designed his first aeroplane with circular wings in tandem. A unique design which later became famous in aviation history. His design was granted a patent. Givaudan designed his tandem circular wing around 1909. To get the machine to fly higher or lower the front wing could be pivoted up and down. The wing at the back could move left and right for directional orientation.

 

The Givaudian design was built by the automobile factory Usines Vermorel, where Givaudan was employed. Power was delivered by a Vermoral engine rated at 50 hp.

 

Although this design of Givaudan was not succesfull he had a long career in cars and aviation. He finally became at the end of his life the president of the Aéro Club de Rhône.

 

[red750]

One-off B-17 Flying Fortress conversion with Rolls Royce Dart turboprops, used for firefighting.