also here may help
http://forum.keypublishing.com/showthread.php?106577-The-last-Battle-of-Britain-Film-Hurricane

Is it not be better that with this sponsorship deal the Dornier is now safely on dry land and heading to be a standing memorial than the RAFM to have had to abort and the thing still sits on the bottom of the sea slowly turning into diluted minerals.
Look how the Burma thread turned into a I told you so and this one cant.
Good luck with further recoveries from the watery Museum around this fine land. sponsored by whoever it takes to get the aircraft up.
one thing is to remember, the cost of this does not end now it is at Cosford so I am glad money is in place to continue and also the learning process of protecting, stabilising and finally display. whichever identity it turns out to be.

Hi Graham,
I was just giving a simple answer that the tube frame I thought was the same on all BT9 against Harvard. yes various wing and fuse differences on Harvards but the BT9 I thought stayed pretty much the same.

At lease Anna got the answer !”

I think a common frame was used but wings, engine and fuselage length smaller in dimmensions

Yale
Engine: Wright R-975-E3; 9 cylinder supercharged radial
Wing Span: 40 feet, 1-7/16 inch (12.25 m)
Length: 28 feet, 4-5-16 inches (8.64 m)
Height: 9 feet, 1-1/2 inches (2.77 m)
Weight (empty): 3163 pounds (1436 kg)
Weight (gross): 4291 pounds (1900 kg)
Maximum Speed: 170 miles per hour (274 km/h)
Range: 700 miles (1127 km)

Harvard
Engine: One 600-hp Pratt & Whitney R-1340-AN-1 radial piston engine
Weight: Empty 4,158 lbs., Max Takeoff 5,300 lbs.
Wing Span: 42ft. 0.25in.
Length: 29ft. 6in.
Height: 11ft. 9in.
Performance:
Maximum Speed: 205 mph
Ceiling: 21,500 ft.
Range: 750 miles

It will go in a fresh water bath I would think first and whilst in some forms of cleaning as whats the point of removing the salt from the crustations and corrosion.
keeping the Aeroplane very dry is a great way of stoping the chloride as the corrosion feeds from the salt and oxygen in the water. they also seem to have come up with a way of neutralising using natural acids and of course the strength will have to be spot on or it cannot work. conservation is top of the list to conserve as much as possible.
As to what they then put over the aircraft to protect it, I doubt WD40 as there are other good protectants like a clear cavity wax that can protect, keep oxygen out and be removed fairly easily if needed.
Main thing I see is keep it in a very arrid enviroment, look at the P40 in the sahara.
Anyway, I am sure others here are much more experten on dar resdorazion of zee Dornier

I would not be suprised he reads here and may private you. He should be picking the Chipmunk up from us this weekend so I will bring it to his attention.
Great to chat to but it was a shame we did not carry on our Spitfire conversation!

We are looking forward to seeing you all after missing Old Sarum last month. We are loading up Friday afternoon ready to head down early Saturday morning.