Category Archives: Visitor

We have just had the pleasure of having meet both managers and conservationists from Forsvarsmuseet, Jærmuseet and museum in Bodø. In addition to inspect aircraft, they gave us clear advice on what methods we can choose from ready to take care of the plane, in both the short and the long term. We got them learn that there are two very different methods to choose from
. One is to disassemble the aircraft completely and physically clean of salts and removing corrosion. The second is to wipe the plane completely out and not provide it any kind of preservative. This latter method involves the aircraft permanently be kept under very stable conditions with a relative humidity down to 15%.

It is gratifying to confirm that we are on the right path when we opted to dry out the hall where wings, center section and most of the parts that we have dismantled from the aircraft is stored. Interestingly, it is of course also to hear that there is a very clear correlation between the advice we were given by Professor Thorfinn Harbor, and the views and experiences communicated from professional expertise in Defense- Bodo museums.

Should one be able to stop corrosion in all the materials that the plane is composed of, we have yet a lot to strive for. We have the good days have seen a humidity down on 30% relative humidity in the hall. Unfortunately, we are also affected by this success. Trek wire which is used in parts of the end walls have dried out and we now have a considerable air leakage through this. We need to prioritize to get rectified before we can implement new measures to further get lowered relative humidity down ideal that is 15%.

We must therefore now a priority to continue to work to lower the humidity outside in the hall, while we still have a lot of work left to do to improve the way we have structured warehouse on

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. When winter temperatures do dat little deadlines to work further out in the hall, it is still our plan to begin working to rebuild the nose and cockpit sections.

From left Jeremy Hutchings, Target conservator / Head of collection- and Documentation Department, Armed Museums, Målfrid Snørteland, Director Jørmuseet, Målfrid Grimstvedt, chief curator Jærmuseet, Hans Dybvad Olesen, Avdelingsdiretør Jørmuseet and Sondre Hvam conservator Jærmuseet.

From left Anders Utgård, Boss, Air Defense Museum, Hanne Jakhelln, Director, Norwegian Aviation Museum, and Erling Kjærnes, Director, Armed Museums

We have earlier this summer had the pleasure of a visit from Thorfinn Harbor, Prof Dr II. ing. Materials Science / corrosion. The purpose of the visit was to obtain input to a method for safe removal of salt from the aircraft numerous joints

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. Here we have made a summary of the information we received in this meeting with Thorfinn Harbor

• Corrosion in a piece of material does not have a knock-on effect against another piece of material that is undamaged and clean.

• Salt will not create bonds with or penetrate into the material sit in plane.

  Salt will not penetrate into the aluminum. But it will be able to bind to aluminum through corrosion products on the surface.

• Salt will penetrate the joints when a plane over time is submerged in seawater
  . Shall be removed salt must be "driven" out. This can be done by mechanical means, Fa.aks. through the application of hot water under pressure inside the joints. Hot water increases the solubility of salt relative to the cold water, and therefore increases the removal of salt.

• salt solved / thinned easiest by water.

  Stagnant fresh water alone will in a small degree be able to drive salt from joints.

• Corrosion can be stopped if the salt is isolated from being able to absorb moisture from the environment.

• One can stop corrosion by reducing the moisture content of the environment of less than 35- 40 % relative humidity.

• Salt water heated becomes more and more aggressively to aluminum. The oxygen content in the salt water will sink, but the chemical reactions will increase so much that on the whole becomes more aggressive. This is a safe rule for temperatures up to 100 degrees C.

• Mixing a preservative product, like for example. Lanolin with salt, could reduce the corrosion rate, but not stop corrosion. Such products will not dissolve or carry the salt from a joining. Should preservative products stop corrosion, this must be done in that they serve as a barrier between the salt and humidity in the environment. A product e.g.. Lanolin will prevent the salt from drying out and thereby crystallize.