Information Security

Miss Beatrice Shilling Saves the Spitfire

Hack a Day - 6 hours 17 min ago

On a bright spring morning in 1940, the Royal Air Force pilot was in the fight of his life. Strapped into his brand new Supermarine Spitfire, he was locked in mortal combat with a Luftwaffe pilot over the English Channel in the opening days of the Battle of Britain. The Spitfire was behind the Messerschmitt and almost within range to unleash a deadly barrage of rounds from the four Browning machine guns in the leading edge of the elliptical wings. With the German plane just below the centerline of the gunsight’s crosshairs, the British pilot pushed the Spit’s lollipop stick forward to dive slightly and rake his rounds across the Bf-109. He felt the tug of the harness on his shoulders keeping him in his seat as the nimble fighter pulled a negative-g dive, and he lined up the fatal shot.

But the powerful V-12 Merlin engine sputtered, black smoke trailing along the fuselage as the engine cut out. Without power, the young pilot watched in horror as the three-bladed propeller wound to a stop. With the cold Channel waters looming in his windscreen, there was no time to restart the engine. The pilot bailed out in the nick of time, watching his beautiful plane cartwheel into the water as he floated down to join it, wondering what had just happened.

Although the story is made up, the engineering problem facing the RAF was all too real. Early in the Battle of Britain, the now-legendary Rolls-Royce Merlin engine, powerplant for not only the Spitfire but also the Hawker Hurricane and the Lancaster bomber, was having a serious problem. RAF Spitfire pilots reported that the fighter would lose power during negative-g maneuvers, meaning that a simple jinking move to line up a shot on an enemy pilot or a quick dive to get out of the line of fire could stall the engine. Sometimes the power loss was momentary, but too often, the engine would just die in flight and fail to restart.

Like all good pilots, the young RAF flight officers quickly adapted to the shortcoming of their new fighters. They learned to do a half-roll before diving, to avoid a negative-g attitude and keep the Merlin running. It worked, but it was a stopgap at best, and a potentially deadly restriction on the ability to maneuver when it mattered most. What’s worse, the Luftwaffe pilots were quick to notice the problem — it was hard not to notice the black smoke and loss of power, even in the midst of a dogfight — and they capitalized on the enemy fighter’s weakness. Something had to be done, lest the tide of the Battle of Britain turn against the RAF.

Fatal Flooding Float-type carburetor, simplified. Source: Aircraft Engine Historical Society

In many ways, the Spitfire and the Hurricane were planes built around an engine. While the airframe of the Spitfire, with its beautifully elliptical wings and sleek lines, was certainly revolutionary, it was the mighty Merlin that made the plane what it was. The liquid-cooled, supercharged engine was powerful, simple, and reliable, but the choice of carburetors over fuel injection would come back to haunt the engine’s designers.

The carbs used in the Merlin were much the same as any carb found on a lawnmower or older car today: fuel was metered into a bowl by a simple float valve before being sucked into the intake airstream under suction provided by the Venturi effect. In straight and level flight, the carbs worked fine. But in a negative-g situation, fuel was forced to the top of the float chamber away from the jet, cutting off the flow of fuel and causing the engine to lose power. Returning to a positive-g attitude, fuel sloshed back into the float chamber and flooded into the jets, providing an over-rich fuel mixture to the cylinders. Raw fuel entered the exhaust manifold, where it burned and produced the sooty black exhaust. In the “right” situations, enough fuel would enter the supercharger to flood it, stalling the engine altogether and preventing it from restarting.

The obvious solution was to replace the float-bowl carbs with pressure carbs. But with the Battle of Britain raging, taking planes out of service for engine overhauls was not sensible. The RAF needed a quick fix until a more permanent solution could be fielded.

Miss Shilling Saves the Day Beatrice Shilling astride her supercharged Norton in 1935. Source:

The fix that eventually saved the Merlin came in the unlikely personage of Miss Beatrice Shilling. In a time of strict social conventions and well-defined roles, Beatrice, who went by Tilly, broke all the rules. Fascinated by engineering since she was a teenage girl taking apart motorcycles and racing them, Tilly bucked convention, earning a degree in electrical engineering in 1932 as one of only two women in her class. She followed that up with an MSc in mechanical engineering the next year.

While racing motorcycles competitively — she won awards and set records in 1934 on a 500cc Norton bike to which she had added a supercharger, clocking a 106 mph lap — she started working at the Royal Aircraft Establishment (RAE) in Farnborough. There, in the opening days of World War II, she specialized in aircraft carburetors.

While Rolls-Royce worked on new carb designs for the Merlin, Tilly came up with a fix for the RAF’s woes, and like many such solutions, it was deceptively simple. She reasoned that restricting the fuel flow to the carburetor bowl would prevent flooding, so she designed a simple brass disc with a small hole in it. She calculated the dimensions of the disc to allow just enough fuel for maximum power. As a bonus, the device could be added to the planes quickly and easily, without removing the planes from service.

Officially, the device became known as the “RAE Restrictor,” but as Tilly Shilling toured RAF bases to oversee the installation of the device, the rough and ready aircrews had other ideas. “Miss Shilling’s Orifice” became the new name of the life-saving brass disc, which once installed in the fuel lines solved the problem. The Spitfires were back in the fight, and the RAF eventually pushed the Luftwaffe back across the Channel, thanks in no small part to Tilly Shilling.

Tilly’s Legacy

Tilly did not rest on her laurels. With her workaround in place, she returned to the RAE and continued work on improved carburetor designs. She continued working for the RAE until she retired in 1969, making contributions to fields as diverse as rocket designs and braking aircraft on wet runways. Switching from motorcycles to cars of her own design, she also continued racing well into her 60s alongside her husband George Naylor, a fellow engineer and later RAF bomber pilot whom she married in 1938 on the condition that he first post a 100-MPH lap on a motorcycle.

Beatrice Shilling was a larger than life figure who deserved the many honors bestowed upon her, including the Order of the British Empire and a pub in Farnborough named after her. But being the engineer who fixed the Spitfire and turned the tide for the RAF was probably her proudest achievement.

Sources for Main Image:

Automatically connect/disconnect to PIA


is it possible to connect/disconnect automatically from PIA with Tasker ?



submitted by /u/Szdavid
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New Google Camera with Portrait Mode on Front Camera working

Android - 6 hours 27 min ago



B-S-G Settings:

Model: Pixel XL

Config Camera HDR+: Nexus 6 HDR+ Auto

HDR+ Parameters: Default

Portrait Mode on all models: ON

Developer Settings:

camera.faceboxes: ON OFF

submitted by /u/Ramzhy
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UK's Just Eat faces probe after woman tweets chat-up texts from 'delivery guy'

The Register - 6 hours 32 min ago
ICO to investigate allegations of driver delivering side order of creepy

A customer of takeaway delivery firm Just Eat has alleged a driver from an eatery used her phone number to ask her for a date.…

[Dev] [Huge Update] End procrastination w/ Get Off Your Phone v3.0r

Android - 6 hours 49 min ago
Get Off Your phone

is useful for everyone, anytime anywhere. Control time with this simple app that locks down your social apps for a specific chosen period !


  • Support all apps with an App Selector, no limit whatsoever !
  • Up to 4 lock times: 30 minutes, 1, 2 & 3 hours.
  • Automatic Update check
  • Minimal Permissions needed ( Check below )
  • Timer lock screen every time you open one of the locked apps to know how much left for unlock
  • Shake detection to check ETA till your apps unlock
  • Beautiful minimal design

How to install:

  • Download from PlayStore. Link below.
  • Install
  • Give usage permission.
  • Select Apps, Select timer, Done !

Download Link:

-Google Play Store

Change Log:

v3.0r (16.1.2018): -Added new timer ( By Request of multiple users ), enjoy the 30 minutes ya'll ! -Separated About me & Recent Changes buttons in Drawer -New Algorithm for Apps Selection, now you can select whatever you want ! -Add Splash screen on launch, no more white screen -Cleaned useless resources -Added new library Multi selector in Libraries Used v2.4r (12.30.2017): -Bug Fix v2.3r (12.30.2017): -Disabled license check until further fixes. v2.2r (12.30.2017): -Fixed new license check, sorry for inconvenience. v2.1r (12.30.2017): -New Libraries screen -Added Signature & License check for the upcoming ad-free version, stay tuned ! -Added Piracy check, because why not ? -Bug Fixes v2.0r (12.29.2017): -Whole new UI -New functions and methods to avoid crashes -Bug Fixes -New SnackBars -New HELP ShowCase view -Removed old API levels that crashed the app. Sorry, the app is now supporting API level 22 to 26 only -Added new button in drawer to check installed apps -Added new apps to the lock-down, YouTube & Reddit -Added PlayStore link in AboutMe page -Changed notification logic, now you can dismiss it using a button v1.1r (12.24.2017): -Added Shake detection to see ETA for your apps to unlock v1.0r (12.24.2017): -Initial Release


  • Update component usage statistics

  • Receive data from Internet

  • View network connections

  • Full network access

  • Prevent device from sleeping

Discord Server:

  • Link here ,Join if you want to interact with me !
  • Please use this post or PlayStore feedback section to post bugs, reports, crash logs or even new features !

  • The app supports 5.1 lolipop+ Only !

  • The App needs to restart twice on first install/Update and once when you set the lock timer !

NOTE FROM DEV: I will be more than happy to guide you, reply to your issues or whatever you have regarding the app. The only reason i actually post here is to see what more bugs/Crashes you guys can get, if you want more features, fix the app or remove a feature. Thanks in Advance ! submitted by /u/XerXesKay
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GitFinder 1.0b20 - Lightweight Git client (beta).

MacUpdate - Mac OS X - 7 hours 16 min ago

GitFinder is a fast and lightweight Git client for Mac with Finder integration. See a file's Git status directly in Finder with descriptive icon badges. Perform numerous Git operations directly in Finder using customizable contextual and/or toolbar item menu. GitFinder can also operate like a full-featured Git client, with rich repository browser; and can show local and remote branches, tags and submodules, diffs, repository and files history, and blames and conflict resolutions.

Version 1.0b20:
  • COMMIT SEARCH (by message, hash, file, author, committer)
  • Do not show icon badges for ignored/untracked files and folders
  • Fixed view splitter positions preservation
  • Fixed commit hash display in the commit info view
  • Other small fixes and improvements

  • OS X 10.11.5 or later

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Internet of Things security issues bleed into 2018

In 2017 Internet of Things (IoT) devices rose to prominence as attackers have continued to target and use them to support various cyberattacks. IoT devices are almost the perfect target for cyberthieves. They sit on internal networks, have their own IP address, and allow communication with other internet connected devices and systems. Their ubiquity and large numbers make them highly attractive targets. Yet, despite their growing numbers, IoT devices are relatively unprotected and make easy … More →

FontBook 5.0.3 - Keeps track of the key codes for font characters.

MacUpdate - Mac OS X - 7 hours 18 min ago

FontBook is the ultimate font utility for all macOSusers who require a quick, easy and comprehensive overview of all their fonts.

Let FontBook display uninstalled fonts on the screen in various layouts. You can print reference pages with selected fonts to assess the typeface, sizes and impression. Or you can find keyboard shortcuts for less-used special characters.

In short, FontBook is the ideal font utility if you regularly have to look for a suitable font or special character.

Version 5.0.3:
  • [New] Complete rewrite for 64-bit and current macOS
  • Fixed letter-layout issues
  • Fixed issue in "75 rev 2" layout
  • Fixed issue in "40 lines" layout

  • OS X 10.11 or later

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Xiaomi the money: China's latest IPO star tastes of bubble tea

The Register - 7 hours 19 min ago

Analysis Xiaomi's rush to go public is as much a sign of a speculative bubble as Bitcoin mania. Will it have a happy ending?…

JotForm 1.7 - Web-form builder.

MacUpdate - Mac OS X - 7 hours 23 min ago

JotForm is an easy-to-use web-form builder. You can create forms using a web-based drag-and-drop form builder, and get form responses emailed to you. JotForm has many advanced features. Such as collecting payments using secure forms and getting your submission reports in Excel. It is also possible to receive and browse your form submissions using JotForm.

  • Browse your recently received web form submissions easily
  • Browse submissions on each online form
  • Search inside your existing form submissions
  • Reply to or Forward your submissions right from your Mac
  • Edit submission data and view forms

Version 1.7:
  • Fixed performance issues
  • Fixed bugs

  • OS X 10.10 or later

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Same tasks at several places


I am trying to start to configure Tasker ; I would like to do this :

I have got my parent's home, my home, my parents in law home,...

I would like to have the same set of actions for the same contexts : for example, turn on wifi in all these places move to do not disturb mode in these places during night,...

Is it possible to say "this profile is active when place A or place B or place C ?"

What is the best way to manage this ?


submitted by /u/Szdavid
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Droplr 5.0.0 - Share images, documents, files, and links.

MacUpdate - Mac OS X - 7 hours 27 min ago

Droplr is a service for uploading, hosting, and sharing stuff. What stuff? Any stuff. You can share images, notes, links and just about any type of file you'd use on your computer. Droplr consists of a desktop application for OS X, an iPhone app, and the Web application for managing your stuff.

Note: This application contains in-app and/or external module purchases.

Version 5.0.0: Annotations Updates
  • Improved UI
  • Undo/Redo
  • A highlighter pen
  • An advanced color picker
  • Emoji
  • Image zoom controls
  • New filled shapes
  • Drag-and-drop from editor
  • Save to files system from editor
  • Set privacy and self-destruct, tag and name of the drop before upload
Other Features
  • Browse drops and boards in the app
  • A new note composer - name the notes the moment you’re taking them
  • A new code snippet composer
  • A new link shortened
  • Improved privacy controls
  • Drag-and-drop to boards from a drop pop-over

  • OS X 10.11 or later

Download Now]]>

Dr. Antivirus 2.1.0 - Adware, malware, and virus remover (was Trend Micro Antivirus).

MacUpdate - Mac OS X - 7 hours 31 min ago

Dr. Antivirus (was Dr. Safety, then was Trend Micro Antivirus) prevents virus from infecting your Mac. Trend Micro's antivirus and spyware active-monitoring laboratory is one of the largest of its kind in the world. It allows you to enjoy your digital life safely. We highly recommend that you scan, using Trend Micro Antivirus on a regular basis to keep your Mac safe from security threats.

  • Real-Time Scan - Provides real time protection against threats
  • Virus Scan - Quickly scan virus to safeguard your Mac
  • Virus Clean (In-App Purchase required) - Clean virus completely for the security of your system and privacy
  • Adware Cleaner - Protect your Mac from adware and browser hijackers

Note: This application contains in-app and/or external module purchases.

Version 2.1.0:
  • Improve virus-pattern update
  • Add premium support

  • OS X 10.10 or later

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Smart JSON Editor 1.03 - Powerful JSON-tree tool.

MacUpdate - Mac OS X - 7 hours 33 min ago

Smart JSON Editor is a powerful JSON-tree tool for app and web developers. Create testing JSON trees, use value transformers to generate / transform JSON values. Test in your app using embedded http server. Many advanced features such JsonPath and SmartObjects included.

Note: This application contains in-app and/or external module purchases.

Version 1.03:
  • HTTP Requests
    • Tree hierarchy importance for API Groups & Requests
    • API groups (development, staging, production) for shared variables and headers within several requests
    • API endpoints (requests)
  • Search
    • Search within Keys & Values
    • Options to select or filter in tree
    • Recent searches
  • Filter
    • Filter nodes to get better temporal focus view
    • Filter via JSON Path for all items at same level
    • Add / remove from filtered view
  • Bookmarks
    • Permanently mark JSON nodes for quick navigation
    • Add / remove bookmarked JSON nodes
  • Webserver
    • Modify sent headers in JSON responses for better customization
    • Select HTTP versions between 1.1 and 2.0
  • Bug fixes
    • Fixed editing crash

  • macOS 10.12 or later

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FC Message Catalogue 1.5.2 - Research assistant (was Message Catalogue).

MacUpdate - Mac OS X - 7 hours 40 min ago

FC Message Catalogue (was Message Catalogue) is designed to be your best research assistant for all of your message / sermon information with a wonderful search feature! All assets like videos, audio, transcripts, PDFs, and other related files can be stored.

Version 1.5.2:
  • Access bug fix

  • OS X 10.11 or later
  • Active Message Catalogue account

Download Now

"Manage" Win10 Microphone + camera

Your hacking tutorial - 7 hours 41 min ago

Hi guys,

can you point me in the right direction on howto make microphone and camera surveillance on a win10 box ?


submitted by /u/joker197cinque
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Categories: Information Security

Keys 1.3.0 - Learn to type.

MacUpdate - Mac OS X - 7 hours 45 min ago

Keys is a simple and clean typing trainer for the Mac. It introduces the keys of the keyboard in 24 lessons, increasing the area in small steps. The application shows for each character in the lessons the finger which should type it, and where that finger needs to move. At any time, the learner can review her or his performance, which shows error rate and speed. To drill down more, use a line chart visualization or keyboard heatmap, to see the learning effect over time or performance by key.

Version 1.3.0:
  • Support for Swedish keyboard layout (including Swedish Pro)

  • OS X 10.8 or later

Download Now]]>

As the cloud’s popularity grows, so does the risk to sensitive data

While the vast majority of global companies (95%) have adopted cloud services, there is a wide gap in the level of security precautions applied by companies in different markets. Organizations admitted that on average, only two-fifths (40%) of the data stored in the cloud is secured with encryption and key management solutions. Who is responsible for protecting sensitive data stored in the cloud? The findings – part of the Ponemon Institute “2018 Global Cloud Data … More →

Typinator 7.4 - Speedy and reliable text expansion solution.

MacUpdate - Mac OS X - 7 hours 51 min ago

Typinator turbo-charges your typing productivity.

Type a little. Typinator does the rest.
We've all faced projects that require repetitive typing tasks. With Typinator, you can store commonly used text and images in quick keywords and abbreviations. From email templates to code snippets to website URLs, there's no easier way to recreate repetitive text at a moment's notice.

Workflow-Friendly Features
  • Uncomplicated configuration. Quickly and easily create abbreviations and assign replacement text and pictures.
  • Simplified migration. If you already use TextExpander, TypeIt4Me, or a similar app, you can migrate to the highly praised Typinator using simple drag-and-drop importation methods.
  • Conversion options. Instantly convert currency values, measurement units and more.
  • Extensive app compatibility. Your text expansions function in all of your OS X and macOS apps with lightning-fast precision.

Version 7.4:

Note: Now requires a 64-bit Intel processor

  • Unlimited Quick Search results in scrollable list
  • Typinator now works with text entered via Keyboard Viewer.
  • Newly added sets are now inserted directly below the selected set, if possible.
  • The diagnostics report now contains information about non-standard settings.
  • Internal cleanup based on application types that are no longer possible
  • Improved suggestions for AutoCorrections in the “New Item” window
  • The list of Quick Search matches now uses a slightly larger font, which makes the items easier to read.
  • Improved logging of certain exceptional cases
  • Additional information during installation clarifies the situation when a newer version is not covered by the current license.
  • Typinator now uses the selected device for sound effects for feedback sounds and no longer uses a separate volume control for sounds.
  • Improved handling of line breaks in clipboard contents when expanding {clip} markers
  • Extended diagnostics report with information about active time and previous crashes
  • Improved appearance of abbreviations with prefixes and suffixes in Quick Search matches
  • Fixes an update problem when a previous version of Typinator was installed in a folder that no longer exists
  • Works around a problem that resulted in multiple expansions in certain border cases
  • Fixes a problem where the {clip} marker produced the result of the previous expansion when two abbreviations were typed in quick succession
  • Fixes a memory leak when combo fields (alternatives with free text) are confirmed with the enter key
  • Avoids creation of “bookmarks” when Typinator performs a clipboard-based expansion in MS Word
  • Subscribed sets are no longer shown as target sets in the “New Item” window.
  • Fixes an issue where the header “ABBREVIATIONS” was initially shown as the target set in the “New Item” window
  • Fixes an error in the English user's guide, which contained the French search terms for finding the most recent abbreviations
  • Works around a potential crash when importing snippets from aText
  • Typinator no longer installs the StockQuotes script, since the service is no longer supported.
  • Improved calculation of the typing speed
  • Fixes a problem with keystroke markers that contain the return key with modifiers, such as {key:⌘↩}
  • C-style comments (starting with //) are no longer suppressed in headings and description fields of input forms.
  • Fixes a problem with confirmation of characters when CJK input methods were used in interactive forms
  • Works around a bug in BlueGriffon that caused BlueGriffon to crash when Typinator expanded an abbreviation in sheet windows
  • Fixes a problem where expansions did not work after changing the keyboard input source while filling an interactive form
  • Internal options for fine-tuning application-specific delays during expansions
  • Works around a problem with the “Please wait…” and “Pasting…” messages of Microsoft OneNote, which slow down clipboard-based expansions
  • Works around a cursor positioning problem in Trello
  • Fixes a problem where certain expansions with header fields in input forms failed
  • Fixes a cosmetic issue with updates on High Sierra, where the download progress window remained on the screen for too long
  • Fixes incorrect information about the last version check, which sometimes was not updated correctly
  • Improves the technique for restoration of MS Word clipboard items
  • Fixes a problem where certain feedback sounds did not work on some audio devices
  • Fixes feedback sounds that did not play when certain expansions were triggered from Quick Search
  • Works around a bug in macOS 10.12 High Sierra that occasionally crashes Typinator for some users
  • Fixes a problem where empty default values were not correctly handled in certain input fields
  • Works around an issue where input fields did not work correctly when the label ended with a period

  • OS X 10.6 or later (fully compatible with macOS 10.13 High Sierra)

Download Now]]>