Archives: Gmedia Albums
Turbopump 3D CAD
3D CAD model images of the A4/V2 rocket engine’s steam turbine powered propellent pumps – all images by Ray Matter. To see Ray Matter’s blog 3D CAD modelling the V2 rocket turbopump introducing these images, just click the link.
Control compartments 3 showing gyro mounting platform with two gyros and DC motor driven 3 phase AC voltage generator. The alcohol tank pressurisation pipe is also shown running through the equipment bay (large silver coloured pipe). Image copyright Imperial War Museum
Album | Equipment bays |
Category | Guidence |
LEV-3 V2 missile gyroscope system with mounting plate. The third component of this system, the Muller gyroscopic accelerometer, is missing – the 2x mounting points can be seen on the right-hand side of the mounting plate.
Album | Missile guidance equipment |
Categories | Missile guidence, Sub-assemblies |
Photo shows rare surviving complete set of 8 lead acid battery cells from one of the V2 rocket’s 32 volt (100 amp) lead acid batteries. Two sets of batteries like this were used to provide the direct current (DC) voltage used aboard the V2 missile to power the DC to 3-phase alternating current (AC) generators, that in turn, powered the gyroscopes, electro-hydraulic servos, trim motors and other vital guidance and control devices. Photo copyright: The Horst Beck Collection
Photo shows rare surviving 1.2 volt cell from the V2 missile’s 50 volt command or signalling battery used in its gyro guidance system (note, the terminal connection on the left is missing from this exhibit, it would be identical to the one on the right). This wet nickel-cadmium battery cell was combined in pairs to a total set of 21 providing a 50.4 voltage at 300mA. The cells were contained in a wooden box that was held on a rack in equipment bay III. Its function was to provide the direct current (DC) signalling voltage that communicated the moment to moment resistance of the gyroscope’s potentiometers to the analog guidance computer (Mischgerät = Mixer-device or control amplifier) aboard the V2 missile. It was critical that the signalling voltage was maintained between 48 and 50.4 volts. Photo copyright: The Horst Beck Collection
The Muller mechanical or Pendulous Integrating Gyroscopic Accelerometer – today normally referred to as a PIGA. Designed by Fritz K Muller.
The J device no1 (J Gerate Eins). The full name of this device is: the Muller Pendulous (or mechanical) Integrating Gyroscopic Accelerometer – today normally referred to as a PIGA. The device, designed by Fritz K Muller, operates as a switch to initiate rocket engine shutdown and is able to smoothly record and accumulate every moment of acceleration, without any kind of recording resolution or discrete time interval limit, of the rocket’s entire motor burn phase, and at the same time process this accumulated acceleration with respect to time as a gradually increasing velocity. In the case of the V2 missile, when the correct predetermined velocity is reached, the velicity sufficient to achieve the desired range of the missile, the device trips the relays that close valves that shutdown the supply of steam to the turbo-pump, and thus shutdown the rocket motor itself.
Valves
Images of the main valves involved in the propellant flow of the A4 / V2 liquid fuelled rocket engine
Images of the main valves involved in the propellant flow of the A4 / V2 liquid fuelled rocket engine
Relic of main alcohol valve with manufacturer code aeq (aeq = Bartoc & Co., Maschinenfabrik u. Giesserei Hedwikow,bei Caslau (Caslav) Czech Republic). An air (nitrogen) inlet pressure of 440 to 530 psi (30 to 36 Bar) was required to close this valve against its internal spring and the force of the turbo-pump. The large nut at the top is the connection for the fuel return (or ‘revolving’line) pipe, and the air and electrical input ports can be seen to the right (air), and left (elec.) just below this point. V2RH image
Anatomy of the V2: 18-pot injector head
We think this relic, welded to a heavy gauge H beam, may be a points switch for a railway line. But do you know what it is, and what it did? If you do, please tell us.
Album | The Enigmas |
Category | Mystery part |
Photo showing Werk Süd with IW on the left and F1 on the right taken on 19th August 1943. The photo shows only light damage to the main halls, although F1 was actually hit at least 11 times, and hits to the separate single storey workshops to the right of the IW hall. The long storage (oil and paint?) shed above IW and the woodworking shop at the top of the picture appear undamaged. Anti-aircraft platforms (at least 3) can be seen on the roof of IW but that seem to be empty of guns. F1 shows two AAA platforms (there was at least 3 at this stage and maybe more) and they may have guns installed. General W. Dornberger mentions defensive AA artillery fire from the from the roof of F1 in his 1952 book V2 (1954 in English).
RAF Recce photo taken 21st August 1944 of region around F1. The GPS marker for this photo is pegged on the lowest of the three fire fighting cisterns clearly visible in the image (in the center about a third the way up from the bottom of the image). Scroll down below this text for map and switch to ‘Satellite view’ where the fire fighting cistern can still be clearly seen today.(for access to restricted areas click here)
Picture shows parts of V2 missile fin structure laying on open ground near area between admin offices and F1 (near Admin. block railway platform, see map).
Picture shows metal debris within the F1 factory boundary walls. The purpose of the part buried liquid storage vessel in the foreground is unknown but it is not a vessel capable of being pressurised. Other assorted metal debris include pipe and cable wall cleats, as well as steel armature rods from reinforced concrete castings (powerful demolition explosions have freed the steel rods from the concrete). These reinforcement rods are a common sight in the environs of Fertigungshalle Eins (F1) and the nearby Repair & Maintenance Hall (R&MH).
This picture shows a small debris field of steel fragments from the V2 missile 130m South-East of F1, and just 20m to the North East of the foundations of a small heat distribution building. Various body and frame parts can be seen and in the middle foreground a 350mm segment of curved missile body ring is visible. These parts have almost certainly been dug up and exposed by the action of metal detectorists. The metal fragments have been abandoned by their finders as they are perceived to have no financial value and hence are not worth removing from the site.
This picture shows a close up detail of parts in a small debris field of steel fragments from the V2 missile 130m South-East of F1, and just 20m to the North East of the foundations of a small heat distribution building. Various body and frame parts can be seen and in the upper left and two segments of curved missile body ring are visible. See previous.
Wooden carboy frame from WW2 (possibly used for transporting small quantities of corrosive and dangerous liquids employed in the V2 steam plant, (such as T-Stoff) laying among trees 190m East of F1 in a location used as an emergency rail freight loading area to F1 due to damage caused by US air raids in August 1944.
Wooden carboy frame from WW2 (possibly used for transporting small quantities of corrosive and dangerous liquids employed in the V2 steam plant (such a T-Stoff) laying among trees 190m East of F1 in a location used as an emergency rail freight loading area for F1 due to damage caused to rail track by US air raids in August 1944.
This picture shows Robert Dalby collecting GPS data with a mapping camera just North of the East end of the Admin office rail platform (near the ruins of the small admin/F1 heat distribution hub building). In all of our explorations we routinely collect GPS track and data points to be able to accurately locate finds and establish a precise correlation between areas of interest identified on historical reconnaissance photography and the modern ground terrain. In the picture Robert is pointing a Contour video camera at details of the terrain that automatically captures the camera’s GPS location information. This data can then be combined with satellite imagery, via Google maps, and provide a detailed graphic mapping track alongside the video footage.
This video still shows Robert in front of a bomb crater on the West or opposite side of the rail lines and road that pass the Repair & Maintenance Hall (R&MH). The crater like so many others, created in a fraction of a second, in August 1944 during a US air raid, has developed in to a thriving eco-system that now teems with all kinds of life. After the passage of more than 70 years the crater is still deep and well defined. There are hundreds of craters like this in the area.
This video still shows the same bomb crater from a slightly different angle. The crater like so many others, created in a fraction of a second in August 1944 during a US air raid, has developed in to a thriving eco-system that now teems with all kinds of life. After the passage of more than 70 years the crater is still deep and well defined. There are hundreds of craters like this in the area.
This video screen grab shows Robert about to climb the steps up onto the rail and road loading station 9 (also called Die Verladerampen or in English, The loading ramps). This storage and loading facility was never finished during the war and was intended to be a more elaborate with large storage buildings – but the pressure of war and constant use of the area prevented further development. The area is still surprisingly intact today with a strong correspondence between modern ground detail and historical reconnaissance photography.
V2 missile parts in F1 prisoner turn-out or ‘free movement’ area. The location referred to is a large triangular shaped area situated on the South-East side of the pre-propuction hall Fertigungshalle Eins (F1). The area was fenced off with a high barbed wire fence (a portion of which was electrified) with guard towers every 60 metres.
This image shows part of a pile of concrete castings that form the below ground foundations for part of the electrified fence that was built around F1 in the summer of 1943. The fence was built on the instructions of Arthur Rudolf, who was responsible for F1, by the first 200 forced labourers to arrive at the F1 labour camp in June 1943. These crude castings are the result of digging a narrow hole in the ground for the concrete fence post and filling the area around the post with the concrete mix. The sizable variation in the depths of the concrete castings, and the fact that in a number of casting blocks the post has plunged through the concrete mix and penetrated from 100 to 300mm into the ground below, strongly suggests this work was carried in hast and/or by men inexperienced in the normal procedures of this type of basic ground-work.
This image shows part of a pile of concrete castings that form the below ground foundations for part of the electrified fence that was built around F1 (see previous photo for details). You can see the area that these posts once secured in the second black and white recce image in this gallery. The fenced off area is the large triangular shape you can see joining the North-East South-East corners of F1 (ie the long wall of F1 facing the shore). Quite why and exactly when someone mustered men or machines to pluck these lumps of concrete out of the ground and move them 100 to 200m is beyond me – why not just bulldoze them under like everything else on this site?
Photo shows the remains of a shooting range built by the East German Army. In 1944 the area about 200m in front of the camera and to the left of this picture is the emergency rail-loading area used after US air raids in August damaged rail lines and other regular freight loading infrastructure. Today, it is a peaceful thoroughfare used mostly by deer and rabbits.
Photo shows the cut stump of an heavy upright support girder. The ragged profile of the cut shows that it has been cut down with an oxygen and gas torch or possibly a larger fuel and oxygen device like a thermal lance. The steel support still has the bottom support pin for a large door. Note that although the girders have been gas-cut there is a great deal of mechanical damage to the steel work that was not caused by the cutting work. Considerable force would be required to bend the middle girder in the way shown, even if it was much longer at the time the bend was created. The upper superstructure of the storage shed may have been part demolished using a bulldozer. Or perhaps the East German Army may have used the site for explosives training – signs of demolition explosive use are in evidence nearby. The map under the album presentation of this picture shows the exact location of the girders.
Bomb damaged F1 factory 1945. The huge V2 rocket factory shown badly damaged by air attack at the end of the war in May 1945
Peenemünde: Werk Sud attacked by US bombers August 1944 in a daring daylight raid. The two large halls F1 and IW in the lower middle of the photo are under direct attack and smoke can be seen originating from both buildings. Although the August 1944 raids did little to interrupt the volume manufacture of the V2, as virtually all manufacturing and assembly of the missile had moved to central Germany, the raids did bring to an almost complete halt the last small amount of manufacturing work still competed in the giant halls of Werk Sud.
Testing fuel injectors
The chart shows water delivery in litres per minute per injector