Sunderlands

Information requests on flying boat fixtures and fittings such as anything internally, radio's, galleys and anchors or Yagi Aerials and Radar fitted externally - anything that is not specifically a weapon as such. This is the place to post photos, plans and documents to form an historical archive.

Sunderlands

Postby apiderw » Mon Jun 20, 2011 9:04 am

Is there a photo, diagram or plan or words that describe how depth charges on a mark 3 or 5 were loaded and readied for dropping. I believe they were somehow transported out under the wings. Or have I it all wrong?
apiderw
 
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Re: Sunderlands

Postby Fred » Mon Jun 20, 2011 10:10 pm

they were hoisted to an rack under the wings, the rack was moveable into the fuselage, where they coud stay for the flying time. in case of attack the rack was moved out and the bombs were sent to the submarine...

think, there could be some in the seawings site... look there...
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Re: Sunderlands

Postby sunderlandmr5 » Tue Jun 21, 2011 7:08 am

Hi

This photo hows the bomb carriage stowed inside the fuselage
Image

They are 250lb "Anti-Submarine bombs" as opposed to Depth Charges (DC), concept was the
same for loading/delivery

The carriage has a chain pulley system that allows the carriage it self to be raised or lowered
Image

Generally Sunderlands carried x8 250 lb DC's but they could carry 400 lb DC's also, but only
x4 would be carried and they were kept stationed out side the aircraft.

When the pilot began his attack, he pressed a button in the cockpit which fired a solenoid,
which then caused some bungy/pully cords to drop the bomb bay doors down and at the same
time as the doors dropped the carriages moved out under the wings.

Photo of Bungy cord
Image

The wings had three tracks, which had thin aluminum strips which rolled back nito
the wing as the carriage moved out. (Note The twin tracks on the Airfix Sunderland are wrong)

This photo shows the track strip partially closed/or open (depending on your way of thinking..)
Image

Note the doors could not close while the carriages are out (modelling tip).

The pilot could also preset the bomb delivery by using a Clockwork device
called the "Mickey Mouse", I have seen one of these in action, it's would up and
when the stop is realeased the contact arm moves across face the and as it touches
a preset contact the DC's would be released
Photo of Mickey Mouse
Image

Hope that helps

Regards

Alan
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Re: Sunderlands

Postby sunderlandnut » Tue Jun 21, 2011 10:30 am

This excellent DVD video should have all you need to know:
“Coastal Command – The Unseen Films” has a section “Bomb handling, fuzing and loading (1945)”
Made for the RAF, this detailed training film for ground crews shows the correct procedure for bombing up a Sunderland Flying Boat with 250lb depth charges.
Available for £7.93 from Amazon with free delivery in the UK.
See http://www.amazon.co.uk/Royal-Air-Force ... B000RJEIJ8

Image

Cheers
Richard
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Re: Sunderlands

Postby GUMMIPUFFER » Sun Jan 13, 2013 3:18 am

GOOD AFTERNOON FOLKS - I SERVED APPRENTISHIP AT SHORTS BELFAST MAIN PLANT AS A+P ON SUNDERLAND ETC. - THE MK V BOMB DOORS ARE DROPPED AS THE GUY SAID BY ENERGIZING A SOLENOID FROM THE 1ST PILOTS SW. WHICH MOVES THE VERTICAL TRACK BOTTOMS INBOARD - THE TRACKS ARE HINGED AT THE TOP . THE DOORS DROP UNDER GRAVITY RESTRAINED BY BUNGEE CORDS . THEN THE ELEC. MOTORS DRIVE THE TROLLEYS OUTBOARD . THE BOMB DOORS HAVE TO BE CLOSED MANUALLY .
THE DOORS CAN BE CLOSED WITH TROLLEYS OUTBOARD - THIS REDUCED THE SLIPSTREAM BLAST WHICH AFFECTED THE 2 X .50 CAL BROWNING BEAM GUNNERS - AND ALSO THE FLARE / SONOBUOY LAUNCHER BEHIND THEM - THERE WAS A BLAST CURTAIN ABOVE REAR BOMB ROOM BULKHEAD , BUT IT DID NOT LAST LONG . THEY ALSO TRIED ONE IN THE REAR FUSE / TUNNEL TO REAR GUNNER , SAME PROBLEM . ALSO IN THE EVENT OF A LOW LEVEL U-BOAT ATTACK IF THE SUNDERLAND WAS HIT AND HAD TO DITCH , IT AVOIDED HUGE INGRESS OF SEAWATER / SINKING . THE 2 X 10 MAN AUTO INFLATABLE RUBBER DINGIES ARE JUST ABOVE THESE TRIPLE TRACKS IN WING ROOTS .
YES, THE BULKHEADS ON FLIGHTDECK ARE WRONG ON THAT AIRFIX KIT - WHY DON'T THESE GUYS GO LOOK AT A SUNDERLAND OR ASK FOR SHOTS FIRST .
SELDOM SEE ANY REFERENCE TO J.A.P. - A.P.U. IN STBD WING ROOT - USED TO POWER 28 V. D.C BUSS ON WATER - AND ALSO TO PUMP FUEL UP INTO WING DRUM F. TANKS . CONTROL PANEL WAS BEHIND RADIO OPS RT. SHOULDER - ALSO ENGINE STARTING PANEL JUST ABOVE THAT AT ASTRODOME SO F/E COULD HELP START P+W 1830 ENGINES - BY PRIMING CARBS / CYLINDERS - PILOTS CANNOT DO THAT ALONE . MAIN L.A. BATTERIES WERE JUST OPPOSIT F/E - BEHIND W/O . MAIN FUSE PANEL ABOVE THEM . I ALSO WORKED ON MK III - ABOVE APPLIES TO MK V ALSO TO THE HIGHLY MODIFIED R.N.Z.A.F. SUNDERLANDS . NO W/O STN. ON THEM - ALL COLLINS REMOTE CONTROLLED.
ALL THE BEST IN 2013 - J.C.
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