Friday, May 22, 2020

"ACROSS THE PACIFIC"

 
~SPECIAL POST~








Please Take The Time To View


"ACROSS THE PACIFIC"


A PBS Documentary About 
The History Of The China Clippers



This Blog Proudly Contributed To The Research For The Program



Episode 1 
"Airborne" 

Episode 2
"Latin Laboratory" 
 
Episode 3
"Another Ocean" 




Saturday, March 28, 2020

The Armee De L’Air


CCXCII


On Armistice Day, November 11, 1918, the French Aéronautique Militaire had some 3,222 front-line combat aircraft in Europe alone, making it the world's largest air force. When the Great War ended the French government was in the process of expanding the air force to 300 squadrons, more than enough to defend France’s far-flung colonial empire in Africa and Asia, and to overpower the Germans in Europe.

The end of the war brought plans for this massive expansion to a halt. France nevertheless maintained its huge air armada and continued to order up new aircraft, though in far fewer numbers than once anticipated. 

French aircraft production was in the hands of dozens of small companies, the most famous of which were Latécoère, Morane-Saulnier, Nieuport-Delage and Amiot, each only producing small numbers of aircraft. Due to their limited production capacity and fractionalized production budgets, by 1936 French aircraft production was absurdly behind schedule. The government’s 1936 nationalization of the aircraft industry into six larger companies did little to increase production since much energy was expended in the consolidation itself.  

And despite the vast number of French aircraft most were of World War I vintage. Even the newer aircraft were generally built as biplanes or strut-and-wire monoplanes. None had the sleekness of the British Spitfire or the later German Focke-Wulf 190.  Even the most modern French all-metal monoplane fighters had open cockpits in 1939. 


Over in the U.K. Hugh Dowding predicted that the French air force would be all but destroyed on the ground if it had to face modern German fighters and bombers. He was deeply critical of the primitive strategy and tactics with which the French planned to conduct any coming air war --- essentially random combat air patrols which might (or might not) intercept German fighters and bombers at any given time. 

Dowding argued to his fellow members of the Air Council that Britain simply couldn’t spare the resources to follow the French example. There was a shortage of fuel, a dearth of pilots, and limited numbers of planes.*

Instead, Dowding argued for a centralized command center where all the data from all the Chain Home and Chain Home Low stations could be compiled, quickly evaluated, and where coordinated steps could be taken to go to battle with enemy aircraft. 

One of the most important elements in this system was one of the most mundane: Stuffy fought the General Post Office (GPO), which controlled not only the mails but the telegraph and telephone lines, tooth and nail to  have all the telephone lines from the CH and CHL stations, the airbases, and the scores upon scores of observer stations installed underground where they could not be knocked out in the event of enemy attack. It was an immense undertaking, irritating to even members of the British Cabinet, and it may have well been one of the least-lauded but most crucial arguments that Hugh Dowding ever won in his life.


Dowding’s Chain Home radar system had its limitations --- it could detect groupings of inbound enemy planes and provide their general direction, but the number of planes and their types still had to be determined by ground-based observers. In order to provide this data, the Royal Observer Corps, a civilian paramilitary founded in 1925, was reorganized into 40 “centres”  (exchanges) controlling more than 1500 observer posts. Observers were trained to identify aircraft, plot their trajectories (note the numbers around the perimeter of the post) and telephone in the information. In general, ROC posts gave the RAF 25 minutes of lead time to scramble to the proper quadrant in order to engage the enemy











*Dowding’s bitter criticisms of the French air defense system were proven correct during the Battle of France in 1940. Roving French squadrons often ran out of fuel and had to disengage from combat with German adversaries or face almost certain death in dry tank forced crashes. Since there was no effective observation system on French ground German fighters could raid French airfields almost at will, destroying aircraft and infrastructure with little risk of loss. Even the (later) highly-effective Hawker Hurricanes that fought in the Battle of France were decimated. Stuffy was furious; the destruction and / or capture of the British aircraft only served to weaken his fighter squadrons at just about the time he was trying to bring them to maximum capacity.  

Tuesday, February 25, 2020

Air-to-Ground and Air-to-Air


CCXCI

The TR9D radio

Lightning struck in 1934 when Stuffy Dowding came up with the idea of installing radios in his fighter planes. At first the idea was dismissed out of hand. Radio components were too heavy, too bulky, and above all too fragile to take to the air in fighter planes. How could anyone jam a big radio box into the “I-put-it-on-I-don’t-sit-in-it” confines of a fighter cockpit?

Stuffy pointed out to the naysayers that all their objections had to do with the limitations of the available technology, but not the concept itself. He argued that if a (relatively) compact and (relatively) lightweight radio could be developed, the RAF would be in the proverbial catbird’s seat when it came to air combat. 

Radios were indispensable in Dowding’s overall view of British air defence. Unlike pilots in World War I, who could rely on hand signals as directions from their compatriots when they were in combat formations, pilots in the coming war would need to exchange fast, complete, and above all, accurate information with HQ and with other pilots.  


Stuffy’s answer was the TR9D radio. As its name implied, it could transmit and receive. It was powered by a small windmill on the exterior of the aircraft.  The TR9D was uncomplicated, easy to repair, and easy to replace. In terms of its dimensions it was not much bigger than a FedEx envelope cubed. It had simple operating instructions and only a single channel.  

The antenna position on the Hurricane (top) and the Spitfire (bottom)

 
 

The antenna stretched back from a housing just aft of the cockpit to the top of the rear vertical stabilizer.  It worked in the AM band. As long as everyone in the squadron was on the same frequency, they could hear one another and ground control. Under noncombat conditions the radio chatter was tolerable, though during combat the box did tend to get rather squawky. 

In 1937, the first planes to get the TR9D were the Gloster Gladiators, the all-metal biplanes that were about to become so magnificently obsolescent. Then they were installed on the Hurricanes. The Spitfires installations came last, but just in time to do their part. 

The ability of pilots to receive flight information from the ground and to coordinate attacks in real time was central to the RAF's victory in the Battle of Britain. Never had so many owed so much to so few vacuum tubes.


Schematics of the TR9D