Aerospace Engines A to Z
Aerospace Engines A to Z

Last update: November 8th 2016 at 21:14

UFEs (Unidentified Flying Engines)

The following pages are devoted to exposing UNIDENTIFIED engines, with the hope that someone can give us details or information about them. So that we can introduce them later into the Main Text in an upcoming reissue.

Certain publications, such as "Popular Sciences" and "Popular Mechanics" usually do not mention the product brand that they exhibit. Thus, many of the photos on display show unknown aircraft, engines, and sometimes the shown person that built the device in question remains unknown.

Ref: UFE-1

Four-cylinder engine with gear that appeared in a current magazine but referring to the pre 1930's.

Ref: UFE-2

More recent engine with two cylinders in an axial position
relative to propeller and gearbox for changing rotating direction.

Ref: UFE-3

Air-cooled upright four-cylinder engine

Ref: UFE-4

Seven-cylinder rotary engine. It is not a Manly.

Ref: UFE-5

Strange inverted V-engine at the Trento museum.

Ref: UFE-6

Four-cylinder engine with atypical mechanism, without classic crankshaft.
It is not the Fairchild Cami-nez.
(From AEHS)

Ref: UFE-7

Engine exposed at the Speyer Technical Museum in Germany. It is a supercharged radial engine that has 42 liquid-cooled cylinders. The labels are in Cyrillic (Russian). Unknown brand and according to a museum caretaker "used in speedboats."
(From AEHS). Zvezda?.

Identified: YES, it's the Zvezda M-503A-2!
Possibly marine.

Ref: UFE-8

3-cylinder rotary engine seen at the McClelan Aviation Museum in Sacramento, CA.

Ref: UFE-11

Five-cylinder revolver type engine, but driving a "spider" type mechanism clearly to be seen in the pictures above. Today this engine is in the Air Museum restoration workshop at Cuatro Vientos Airport, Madrid, Spain.

Ref: UFE-12

Unknown 4-cylinder engine appeared in an auction of military "sur-plus" engines in the US.

Ref: UFE-13

8-cylinder engine exposed at the MEA engine storage in Paris. (Verchua?)

Ref: UFE-14

The article's author had taken out the written part of this engine, so it could not be identified.
(An 8-cylinder Jabiru?)

Ref: UFE-15

Small turboshaft from the Raven ES-101 helicopter.

Ref: UFE-16

Engine with a curious water radiator that is installed on an aircraft at the Brussels Museum.

Ref: UFE-17

A 110 hp Radial engine fitted on a custom-build motorcycle.

Identified as ROTEC.

Ref: UFE-18

Engine information wanted for the Elizalde or ENMASA brand. (Spain)
For the "Tigre" VI, VIII and XII models.
And the Elizalde "Atlante".

Ref: UFE-19

Device with an unknown engine.

Identified: it is a Pigott-Parr engine from 1911.

Ref: UFE-20

Czechoslovak rotary engines that appear under the name "letecký motory Staatsmotor". With special valve system control.
The upper one, a single row engine, is in the historical summary made by LOM-Praha.
The lower one is stored at Musée de l'Air et de l'Espace Le Bourget.

Ref: UFE-21

Thrusters of the Russian space probe "Phobos".
In fact it is a "quasi perfect" model that has been displayed at the commemorating exhibition for the 50th anniversary of the Russian "Sputnik" the first artificial satellite in history. (1957-2007).
It belongs to J. Castellsaguer's collection.

It has been shown at the "Caixa Laietana" Exhibition Hall in Mataro (BCN). The picture is taken in May 2007. The Phobos 1 and 2 are of Russian origin. They were launched on a Proton K, in 1988. (Yuzhnoye?).

Ref: UFE-22

Johnson engine? on a johnson aircraft? Seen in the Aero Magazine, in 2007.

Ref: UFE-23

Single-cylinder engine with double ignition on an ultralight.

Ref: UFE-24

6-cylinder Subaru based engine. According to the situation and the exhaust direction it is a pusher.

Note: It is already identified.

Ref: UFE-25

Engine with reference 4A084-GPU on a J-3 Kitten -scale model- Australia? New Zealand?

Ref: UFE-26

Turbojet on a motorcycle. Which one is it?

Ref: UFE-27

Boosters for the English SEASLUG missile.

Ref: UFE-28

On the ANZANI, H-S and other French engines we would like to know the meaning of the letters “Bte. S G D G”

Solution received:
Patented: Without government guarantee.
(Breveté Sans Garantie du Government)

Ref: UFE-29

-Pictures of the Polish PZL: Waran (Lizard) and Leguran (Iguana).

-From Rateau: Info and pictures of the “Idole” engine.

-From Reggiane: Info and pictures of the Re102, Re103, Re104 and Re105.

-De Regnier: Info and pictures of the 2T01, R1.

-De Renard: Info and pictures of the 400, 240 y 120.

-Info and pictures of the Renault 12G.

-Info and pictures of the 11-cylinder Rhenania rotary.

Ref: UFE-30

Renault engine? unreferenced. Possibly adapted for industry, marine or airship.
L-R and D34A brands?

Identified: Finally, although it seems to be a Le Rhone, it is a Louis Renault (L-R).

Ref: UFE-31

Pulse jet engines installed on a launch by 1959 and seen in Canyon Lake, Arizona USA.

Homebuilt or from an aircraft engine manufacturer (?). Appeared in a "Mecanica Popular" magazine of that year.

Ref: UFE-32

American "Dragster" type vehicle with three turbojets perhaps Westinghouse.
(Photo Flickr?)

Ref: UFE-33

Turbine mounted on a motorcycle. Allison 250?

Ref: UFE-34

42-cylinder radial engine. Possibly a Russian Zvezda.
To be confirmed. Maybe marine.

Ref: UFE-35

Unknown engine on a Stol Ch 701 aircraft

Ref: UFE-36

Burya engines, black vehicle installed on the Russian carrier Energia.

Ref: UFE-38

Radial engine offered by a company from Lodz, Poland, with reference "Y5b"

Ref: UFE-39

Engine on a dynamometer bench with reference "B2 engine" for ULM.

Ref: UFE-40

Small Mosquito helicopter powered by an unknown turbine.

Ref: UFE-41

Radial engine used as a foot for a glass table top.

Ref: UFE-42

Four-cylinder V-engine. It seems to be a 2-stroke engine because of the exhaust situation.
The pilot is Hanns Georgi.

Ref: UFE-43

Auxiliar Russian turbine model TG-6. APU for the Tu-154 and IL-18.

Ref: UFE-44

Three-cylinder radial engine. It looks like a liquid-cooled motorcycle engine. For ULM.

Ref: UFE-45

The Virgin Spaceship II has two Williams-RR FJ-44 turbines in the carrier. But the lower vehicle has a hybrid rocket engine. Solid rubber and nitrous oxide like Ship One?

In any case, the Virgin Space Ship One's rocket engine did use rubber with nitrous oxide. But we do not know the brand.

Ref: UFE-48

Inverted (or normal) V-engine used in this plane with an excess of caution by pilot Gustav Tweer at the Bork field.

Ref: UFE-49

German engine on a homebuilt aircraft. It has two opposed pistons and two crankshafts, in the style of Junkers Jumo 205, 207...

Ref: UFE-51

Small turbine for UAVs, RPVs, etc. Mounted on a car turbocharger.

Ref: UFE-52

UAV with vertical take-off ramjet and booster.

Ref: UFE-53

Turbo rocket

Ref: UFE-54

Auxliary engine with opposed cylinders (APU?)

Ref: UFE-55

Two-body Wankel-type rotary engine

Ref: UFE-56

Radial engine on a motorbike

Ref: UFE-57

Inverted Two-cylinder engine on a Mignet HM-14

Ref: UFE-58

Strange and unknown horizontally-opposed, four-cylinder engine resting on a Righter in the engine reserve storage at the San Diego Museum in California, USA.

Information has been requested from the engine's caregivers. It seems to be an amateur construction by a certain Williams.

Ref: UFE-59

Radial steam engine with three cylinders. It is exhibited at the Robins Air Force Base, AFB, Georga, USA.(See main text)

Ref: UFE-60

Engine like a Poinsard or Dutheil et Chalmers. The intake manifold misleads with a strong triangle and the carburetor at its upper vertex. Water-cooled.

Ref: UFE-61

This photograph of a two-cylinder V-engine on a Henri Mignet Pou-du-Ciel is taken by Peter Collins at the Imperial War Museum in Duxford (On Flickr) (PiP)

Ref: UFE-62

We received the outline of a new engine called "Round Engine" that precisely differentiates it from the Wankel system. The prototype is 625 cc and the brand might be VGT.

Ref: UFE-63

Design from an unknown author at the end of the 1930's aproximately.

Ref: UFE-71

Turbojet without identification that can be found at the “Ailes Anciennes de Toulouse” Museum.

IDENTIFIED: It is a Bristol Ofpheus, (BS-358?)

Ref: UFE-72

Harold Gallatin and his unknown Wankel style engine of a regular size and very naked yet. Without more data. Intending to install it on his Mooney Mite plane.

Ref: UFE-73

Photograph of a Pou-du-Ciel, Mignet HM-14 with an unknown horizontally-opposed, four-cylinder engine.

Ref: UFE-74

Strange engine with two inverted cylinders of an unknown brand.

Ref: UFE-75

Interesting and very modern turbojet from an unknown brand for the moment. It seems a design exercise with afterburner.

Ref: UFE-76

Engine installed on an aircraft built by students of the "Aviation Mechanics School" in Illinois, USA in the years 1920-1930.

Ref: UFE-77

Unknown engine with aeronautical traces installed in an automobile.

Ref: UFE-79

Unidentified engine with opposed cylinders, in a sort of modernized Demoiselle. (PiP)

Ref: UFE-80

Revolver type engines have been prolific to be tested for aviation. In this case it is one adapted for automobile (see levers and pedals).

Ref: UFE-81

This pilot has available an independent engine compressor to provide pressurized air for main engine start, even during flight.

It has a lever to get it started.

We seek information about engine and compressor. (PiP)

Ref: UFE-82

It is difficult to distinguish which is this revolving type engine because of the bad reprocuction of the image.

Ref: UFE-83

Radial type Diesel engine invented by a certain Captain Winslow or Wishdom (illegible). Can you help us?

Ref: UFE-84

Two-cylinder Vee-engine, it seems to be for motorcycle and American. (PiP)

Ref: UFE-85

Appearance and mechanism of a toroidal engine moving a system of connecting rods and crankshaft.

Ref: UFE-86

Barrel or revolver type engine and detail of the Z-type swing crankshaft.

Ref: UFE-87

Do you know something about this engine possibly intended for aviation after its adaption by this man so proud of his work? (PiP)

Ref: UFE-88

Two gentlemen showing an aviation engine with opposed cylinders. We can see that the the propeller shaft is higher than the shaft formed by the cylinders, with possible interposed gearbox or an assembly on the camshaft (see Tiara Continental e.g.). (PiP)

Ref: UFE-89

A curious little engine and propeller, apparently too light.

Possibly a two-stroke engine. more information is required. (PiP)

Ref: UFE-90

Two engines, possibly the same type and brand. Unidentified.

Ref: UFE-91

Two characters, possibly they are this engine's designers, posing proudly in front of it.
Do you have any information about it? (PiP)

Ref: UFE-92

The helicopter Hunting Percival P-91 1954 used reactors in its blade tips: Pulsejets or ramjets?

Ref: UFE-93

Unknown engine with belt gear, possibly on a Piper.

Ref: UFE-94

Strange single-seat helicopter appeared on a Camel cigarette ad from the 1950's.
The engine seems to be an engine with four opposed cylinders in a vertical position.

Ref: UFE-95

What is the model of the Snark's boosters? The brand is Aerojet-General (and Alleghany Ballistics). It delivers 130,000 lbs of thrust (the cruiser engine was a P & W J-57).

We see the boosters attached to the Northrop Snark and detached after takeoff from fixed point.

Ref: UFE-96

The American Navy's Consolidated Vultee Lark, XSAM-N-4, used two solid fuel boosters and a Reaction Motors LR2- RM-2 liquid fuel rocket engine (two chambers). The boosters are still unidentified.

Ref: UFE-97

Revolver type engine with swash plates running on Diesel.

Ref: UFE-98

Inverted 2-cylinder Vee engine. (Tomtit, Harley-Davidson, Indian?) (PiP)

Ref: UFE-99

At the cylinder we can see that there are side valves, so it has an L-shape combustion chamber.

Ref: UFE-100

Austrian rotary piston engine from the 1930's.

Ref: UFE-101

Motor that seems European, special for transatlantic flights. (PiP)

Ref: UFE-102

Costes and Bellonte? (PiP)

Ref: UFE-104

Clearly a rotary engine. Possibly smaller than it seems.

Identified: It is a Circom.

Ref: UFE-105

Testing an unknown supersonic engine. (PiP)

Ref: UFE-106

Small turbojet with an annular bifurcation of the frontal bypass.

Ref: UFE-107

Possibly a Teledyne Continental J-402
(Or not!)

Ref: UFE-108

Small turbojet with By-pass. In Pakistan?

Ref: UFE-109

Presented as Aft-fan, without more details for the moment.

Ref: UFE-110

Semi hidden engine at the "Heritage of Flight" Museum in the US Possible name: "Fal --- & Marquard" (Incomplete) Radial engine with 6 double cylinders.

Ref: UFE-111

Twin engine of a so-called "world's smallest plane" in its day. (PiP)

Ref: UFE-112

A French 25 hp twin engine made in Issy-les-Moulineaux, Seine. Paris.

Ref: UFE-113

German rotary radial engine without central crankcase, without valves, and with ports in the cylinder. It is a two-stroke engine and the mixture is aided in its movement by centrifugal forces.

Ref: UFE-114

Four engines like the one in the photo, 32 hp, and 172 lbs. They are built in San Diego and they powered the "Tolliver" airship.

Regarding the shape they might be Adams Farwell
rotaries, but certain details do not confirm this. (PiP)

Ref: UFE-115

Engine with an aeronautical appearance, used in cars in the USA. Our information is from a magazine, whose ad was from St. Louis.

Ref: UFE-116

Engine with an aeronautical appearance, used in cars in the USA. Our information is from a magazine, whose ad was from St. Louis.

Ref: UFE-119

Engine used in a motorized glider crossing the English Channel. The engine is unknown. The glider was flown by pilot R. Kronfeld, around 1930 or earlier. (PiP)

Ref: UFE-120

German Diesel engine with an outer delta-shape but radial shaped inside. It has a central combustion chamber.

Ref: UFE-121

Turana rocket booster engine, built in Australia by the Government Aircraft Factories GAF.

Ref: UFE-122

STME engines to replace the NLS Shuttle program.

Ref: UFE-123

1,500 hp turboprop that is unidentified for the moment. (PiP)

Ref: UFE-124

Engine that was installed on the modern Zeppelin NT airship. (PiP)

Ref: UFE-125

Radial engine with sliding sleeves. (on the right)

Ref: UFE-126

Small two-cylinder engine. Two views.

Ref: UFE-127

A V8 engine that is identified as Adams but it does not look like it. On the guess plate: "Sweetzer". It has a Simms magneto.

Ref: UFE-128

Unidentified 7-cylinder radial engine.

Ref: UFE-129

Rare compound engine with auxiliar cylinders to assist the main ones.

Ref: UFE-130

Double engine installation with contra-rotating propellers. Twice Half Levavasseur?

Ref: UFE-131

Iranian engines (Ref: Simorg)

Ref: UFE-132

Iranian engine (Ref.- Scud)

Ref: UFE-133

Toroidal engine. BSA?

Ref: UFE-134

Four cylinder boxer, with three-blade propeller

Ref: UFE-135

Russian engine at a museum

IDENTIFIED: It is the Russian "Kalep" engine

Ref: UFE-136

Engine discovered by Evzen (cooperator) in a museum in Dresden, Germany.

When contacting the museum director, he identifies it as a NAG F2

Ref: UFE-137

Engine presented at the Milan Trade Fair in 1937, intended for cars and it has "four bodies." It does not seem orthodox. With features of De Wrachien engines.

Ref: UFE-138

Test with a V-2 engine with aviation cylinders. (Seen in the Internet) (PiP)

Ref: UFE-139

A strange engine for its extremely simple construction is exhibited at the Hugo-Junkers Museum in Dessau, Germany.

Ref: UFE-141

Test bench with a German rocket engine that runs on liquid fuel.

Ref: UFE-142

The double row radial engine in the center seems rotary, from an unknown brand.

Ref: UFE-143

Twin engine from a Russian publication.

Ref: UFE-144

Horizontally opposed 8-cylinder engine.
Is it Berlin et Lieber?
Another model?

Ref: UFE-145

Russian hypersonic missile: two boosters and a ramjet.

Ref: UFE-146

Engine with horizontal cylinders on Bertin's helicopter.
Eight cylinders?

The engine is designed in 1911 by Bertin himself and his asociate. (Bertin et Lieber)

Ref: UFE-147

Unknown 2-stroke radial rotary engine with blower, found in documentation at the MAE.

Ref: UFE-148

Hot-Rod automotive engine with visible aviation cylinders. Origin unknown for the moment.

Ref: UFE-149

Extraordinary design of a radial engine seen on Flickriver (cad-cam?). It is a seven-cylinder engine with cylinder head valves. sliding?

Ref: UFE-150

Two-cylinder Vee engine (see the shadow of the first photo)
There is no certain information about brand or manufacturer. Perhaps Gibson 1909.

Ref: UFE-151

The engines shown above are of the same type. They appeared on a Russian internet website.
Although they look like the Williams from the USA.