Heliograph: Mance Mark V

This is a short "fly-around" of a British WWII Mance Mark V heliograph set up in the "duplex" (two mirror) configuration. The heliograph signaled long distances using reflected sunlight and Morse code. It was used by many nations from the 1870s to the 1940s. The Wikipedia article "Heliograph" is a good summary. The references to that article provide information in much greater depth. Today I signaled 22 miles, which is short range for this heliograph. My receiver today used his naked eye. Military heliograph teams used 30x telescopes as standard issue. Mance began his publicity campaign for his heliograph in London in 1875, and it was issued to British and Commonwealth troops until the end of WWII. The messages were transmitted by Morse Code created by briefly tilting the mirror to interrupt the beam. When the sun was on the opposite side of the signaler than the target, two mirrors were used, as shown here, causing the light to travel in a zigzag path through the instrument. Before signaling, the heliograph was aligned with the target. This was done by looking in the main (gimbaled) mirror at the sight (in the duplex setup, the crosshairs on the paper on the center of the secondary mirror), and moving the heliograph arm and the sight until the three points lined up: the target, the unsilvered hole in the main mirror, and the sight crosshairs. When one mirror was used, a crosshairs ring sight served as the aimer. Once aligned, the sunbeam was brought in alignment by using the azimuth and elevation screws on the main mirror to cast the tiny shadow spot from the unsilvered hole in the center of the main mirror on the crosshairs. At that point, transmission began by using the broad collar on the rod behind the main mirror as a telegraph key, briefly tilting the beam off the target line. Due to the motion of the sun, the shadow spot had to be realigned with crosshairs every 15 seconds or so. The aiming and signaling process for a Mark V heliograph in single mirror mode is shown in the longer YouTube video: "VMARS Heliograph Demonstration 2". If you own a heliograph, get the 1922 manual. I posted it on Google Docs as a free 55mb .pdf here: https://docs.google.com/open?id=0Bxca_am-Ldk6bTR5MVRmeXlScjZIQ19jWjloSTM0UQ The manual is: "Signal Training, Volume III, Pamphlet No. 2. Heliograph, 5-inch, Mark V, 1922, published by His Majesty's Stationery Office, London, Crown copyright reserved. My understanding is that the Crown copyright lapsed in 1972 (50 years), so it should be freely distributable.

TARGET AD 2
2012/01/29 rafowell   Share on Facebook

RELATED VIDEOS

VMARS Heliograph Demonstration 2
Play Video

VMARS Heliograph Demonstration 2

2010/11/02
22 mile flash from 2"x3" glass signal mirror
Play Video

22 mile flash from 2"x3" glass signal mirror

2012/01/29
Mance Mark V Heliograph Flyaround (Simplex Mode)
Play Video

Mance Mark V Heliograph Flyaround (Simplex Mode)

2013/08/18
The Signaling Mirror: WWII US Government Training Film
Play Video

The Signaling Mirror: WWII US Government Training Film

2010/07/29
The Daguerreotype - Photographic Processes Series - Chapter 2 of 12
Play Video

The Daguerreotype - Photographic Processes Series - Chapter 2 of 12

2014/10/01
Heliograph
Play Video

Heliograph

2010/12/02
Heliograph Mk V Sun Signaling Mirror
Play Video

Heliograph Mk V Sun Signaling Mirror

2011/06/23
Heliograph
Play Video

Heliograph

2011/06/10
Using the Dremel 220 Rotary Workstation to start a signal mirror aimer
Play Video

Using the Dremel 220 Rotary Workstation to start a signal mirror aimer

2016/02/24
Heliograf w akcji - film poklatkowy
Play Video

Heliograf w akcji - film poklatkowy

2009/06/13
The Flat Earth : The Heliograph/Signal Mirror Proves A Flat Earth 125 miles
Play Video

The Flat Earth : The Heliograph/Signal Mirror Proves A Flat Earth 125 miles

2016/07/15
Signal Mirror Use - How To Do It Right
Play Video

Signal Mirror Use - How To Do It Right

2010/12/08
Standing on the top of a mountain signaling with a signal mirror
Play Video

Standing on the top of a mountain signaling with a signal mirror

2010/09/06
Heliograph Sun light communication device used between Settlements 1930-40s
Play Video

Heliograph Sun light communication device used between Settlements 1930-40s

2014/04/06
heliograph.wmv
Play Video

heliograph.wmv

2012/05/17
Survival Signal Mirror Flashes at 0.7, 11.1, 43 mile range
Play Video

Survival Signal Mirror Flashes at 0.7, 11.1, 43 mile range

2009/04/26
Jeff Hayes on how a Tesla Turbine works
Play Video

Jeff Hayes on how a Tesla Turbine works

2012/08/29
Heliography: Using the Sun to make Art
Play Video

Heliography: Using the Sun to make Art

2013/06/07
Azimuth mirror part 2
Play Video

Azimuth mirror part 2

2014/04/30
Making a Signal Mirror with a Retroreflective Aimer
Play Video

Making a Signal Mirror with a Retroreflective Aimer

2016/02/24
World War One Telephones Begbie Lamps Heliographs: World War One Signals Part 1:British Empire
Play Video

World War One Telephones Begbie Lamps Heliographs: World War One Signals Part 1:British Empire

2016/03/19
The Cult of Beauty at the V&A
Play Video

The Cult of Beauty at the V&A

2011/03/29
"The Great Anglo-Boer War" TV Documentary 5 - Heliograph
Play Video

"The Great Anglo-Boer War" TV Documentary 5 - Heliograph

2013/05/23
Mother heliographs family on Drakensburg Rhino Peak
Play Video

Mother heliographs family on Drakensburg Rhino Peak

2013/05/21
Powered by YouTube

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.