View allAll Photos Tagged rotor
Geheimschreiber
Although the ENIGMA remains the best know German cryptographic machine of World War II, in the early 1940's the German military introduced several new cryptographic teletypewriters known under the name Geheimschreiber - sometimes translated as "private secretary", sometimes as "secret writer".
These machines offered on-line encryption and decryption, that is plain test could be typed directly into the machine, automatically converted to encrypted text, and sent directly to the transmitter. In addtion to security, these "secret writers" provided the Germans with the ability to encrypt large volumes of test at high speed.
Learning that the Germans had named an early version of these machines SWORDFISH, the British and Americans bestowed nicknames associated with fish on the machines and the communications links in which they were used. The two most famous are TUNNY and STURGEON.
Just as they developed the Bombe to assist decryption of ENIGMA , the British developed data processing to attack the fish family of machine ciphers. (I must add: This was a whale of a job!) This led to the construction of the COLOSSUS which British historian F. H. Hinsley is "justly claimed as a pioneer programmable electronic digital computer."
STURGEON Siemens and Halske T52
The German Air Force began using the Siemens T-52 in 1942. The British nicknamed the machine STURGEON. Prototypes of this machine were developed at the request of the German Navy and were first manufactured in 1932.
Like the TUNNY machine, the STURGEON provided the German military with on-line cryptographic encryption decryption with high speed for large volumes of messages. The STURGEON added encryption capability to a standard teleprinter, although some models of STURGEON were later adapted for direct radio transmission.
There is a great report concerning TUNNY and COLOSSUS at www.alanturing.net/tunny_report/
Source: National Cryptologic Museum 13 February 2009 with some hyperlinks added
i09_0214 090
Meetopstelling zie:
www.flickr.com/photos/fotoopa_hs/10755474944/
Mat zwart rotor blad van 5mm breed die 12000 tr/min draait. detectie is aanwezig over een periode van 375 us. Dit simuleert een heel snel bewegend object. Object is zwart, de versterking is vrij hoog want er treed net verzadiging op in de OPA380. Diafragma van de meetlens staat op F5.6 Ik kan de gevoeiligheid eigenlijk nog opdrijven via de meetlens tot F3.5. Vooral s'nachts of bij afwezigheid van zonlicht kan de totale gevoeligheid nog een factor 2 hoger ingesteld worden. C10 is terug 1nF R10 is 1M en de pulsduur van de IR laser is 15 us On 25 us off. Je ziet ook de regeling van de referentie spanning omdat de duty-cycle geen 50% is. Er zitten 2 rotor bladen op 180 graden per toer ( nodig voor de symetrie anders vliegt het geheel in de lucht door de hoge snelheid!.
Update:
5mm afstand in 375 usec komt overeen met 48 km/uur. Zelfs met een gewone flits zou zo een beestje niet eens meer scherp staan. Immers de meeste flash instellingen liggen ook rond de 200-300 us flitstijd. Deze simulatie lijkt mij al een heel hoge snelheid. De meeste objecten aan deze snelheid zouden trouwens volledig buiten beeld vallen bij een shutter-lag van zelfs 4 msec. De decoder zou ik instellen op minimaal 2 hits bij een bepaald level. Dit zou al na 80 us gegeven worden. Level instellingen zou ik kunnen kiezen tussen 4 vooraf bepaalde waardes. Vooral als er geen zon is kun je heel gevoelig werken.
Operational ENIGMA rotors
To further enhance ENIGMA's security, the German military issued extra rotors with each machine, two for Army and Air Force, four for the Navy. Each rotor was wired differently and identified with a Roman numeral. Setting up a communications net involved selecting the rotors for the day and placing them in the proper left to right order.
Source National Cryptologic Museum
Comment - presume this is a set of navy rotors as there are a total of seven, three plus four extra. The name of this set looks to be M6829
ENIGMA remains the best known German cryptographic machine of World War II.
ENIGMA cipher machine collection
i09_0214 102
Pave Hawk angled right-side four-blade tail rotor hub with control rods and links. The angle of the tail rotor creates a vertical component to the lift vector of the tail rotor. This vertical component is sufficient enough that 2.5% of the total lift created by the rotor system on the HH-60G is created by the tail rotor.
During a SWAT insertion exercise, the rotor wash from a Bell 205 can kick up a lot of dry grass.
Credit: Chad Dollick, San Diego County Sheriff's Dept
mazda rotor - banana cake with fondant finish. Check me out on facebook www.facebook.com/pages/The-Whole-Cake-and-Caboodle-Whanga...
Unit 5 in Búrfell hydro power plant in Iceland being refurbished.
www.landsvirkjun.com/Company/PowerStations/BurfellPowerSt...
High-pressure fuel turbo pump rotor from a space shuttle liquid-fuel rocket engine. According to the information displayed with this rotor, it turned at up to 36,000 RPM.
Infinity Science Center
Hancock County, Mississippi.
Infinity Science Center:
Stennis Space Center:
Rotor Vapour from the USMC Osprey at RIAT 2012, as the Ospreys arrive from their base at Farnborough
These photos were taken on a rescue recently of 2 stranded Snow Boarders who went out of bounds and ended up in suicide gully. North Shore Search and Rescue Handles all calls on the North Shore Mountains.
© Jay Piggot/Inspired Eye
Photo cannot be used with out consent
Building my own version of Rotor for a school project. And WOW THIS IS THE MOST CLEAR PHOTO I'VE EVER TAKEN ON MY IPHONE IT'S ALMOST AS IF I HAVE A LENSE EVEN THOUGH I DON'T.
Rotor of probably Soviet Mi-8 laying outside Zare center village, Zare district, Balkh province. This helicopter was shot down with a stinger by local mujaheddin during Soviet invasion. All remaining pieces of this helicopter were taken by inhabitants and mostly used in their houses (including doors, windows, metal pieces etc.)
This car sold for over $200,000!
Owned by Bert Boeckmann. Owner/President at Galpin Motors Van Nuys, California
Built by Ed Roth
Rotar stands for "Roth Air Car".
Ed used two Bell Auto Parts built 650cc Triumph twins laid on their side.
A high pressure prop was mounted to each engine that created a cushion of air that allowed Rotar to propel itself on land and water.
Directional flaps on the bottom were plywood and the rear fin was fashioned after Ed's '59 Cadillac.
My photo from
Movieworld - Cars of the Stars
It was a museum in Buena Park, California It doesn't exist anymore.
Cars of the Stars
6920 Orangethorpe Ave.
Buena Park, CA 92801
The main rotor can be tilted forwards and backwards. The blades of both the main and the rear rotor are tiltable, too!
IES Manuel García Barros, 2017
© Cc-by-sa-4.0 L. Miguel Bugallo Sánchez.
Orixe: commons.wikimedia.org/wiki/File:Rotor_de_aeroxenerador._S...
Warning! Incoming object identified as Rotor, one of Von Nebula’s most dangerous minions. Capable of incredible speeds and mobility using his helicopter jet pack, Rotor can use his highly dangerous biohazard gas attack from any direction. The whoosh-whoosh sound of his rotors might just be the last sound you hear.