Category Archives: Working with the small parts

2023.12.23

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The Aviation History Museum Sola is currently an ongoing and large construction project here. In addition, a major regrouping of the aircraft that we have on display will be done in our old exhibition hall. The high level of activity leads to a great need for voluntary efforts from the museum's members. This also affects the amount of work we are able to do on the Heinkel He 115 project.

Nevertheless, Egil Thomsen managed to make a new pilot's seat during the autumn. When the aircraft was raised in 2012, much of the equipment needed to adjust the pilot's seat height was still intact. In addition, the reinforced plate behind and under the seat was in good condition. The pilot seat itself, with associated frame made of aluminum tubes, however, was completely gone.     

Reinforcing plate and accessories for seat height adjustment as found when raising the aircraft i 2012
Reinforcement plate and accessories for height adjustment of the seat as found when the aircraft was raised 2012

Egil has reconstructed the tube frame and then made a new seat pan itself. This is bolted to the tube frame. The result has been very good. To be able to raise and lower the seating height, the seating arrangement was equipped with a separate hydraulic system. A hand pump was mounted on the side of the seat. The hydraulic pump and some of the valves that have been in the system are still in good condition. Egil is now working on finalizing and assembling this entire system. We are not yet ready to be able to reassemble the seat arrangement in the cockpit again. This will therefore be exhibited for a period in the museum's exhibition.

Egil Thomsen has made a new tube frame and seat pan to replace the pilot's seat which was completely destroyed
The new pilot's seat. The original seat was completely destroyed after lying down 70 years on the fiord.
Pilot's seat. The museum's Arado 96 can be seen in the background.
Egil has overhauled the mechanism used to lock the pilot's seat height.
The hydraulic pump which was part of the system to be able to raise and lower the pilot's sitting height
Some of the equipment included in the system to be able to raise and lower the pilot's sitting height.
Trial installation of some of the equipment used to height adjust the pilot's seat.

Throughout the winter, we will continue to work on reassembling equipment in the cockpit and Kanzel. This is equipment that we have previously taken out of the sections in order to preserve it

The center section has corrosion damage throughout 8 wing mounts with associated structure. The same applies to all four float mounts. In order to work with these injuries, the center section must be placed in a "crib". In addition to the "crib", we need jigs to ensure that we are able to reassemble the wing mounts in the correct position. The National Antiquities has given us financial support to be able to build a jig with an associated "crib". Work on building these is now well under way. We plan to be able to start work on repairing the corrosion damage to the center section during 2024.

The center section together with parts of the crib in which the section is to be placed while the work is in progress.

The museum services in Rogaland by conservator Eirik Aarebrot have preserved the aircraft's starter batteries for us. These are two twelve volt acid batteries that we in 2012 found at the back of the tunnel in the center section. The batteries were behind 70 years on the fjord bed still in a usable condition. We have attached some of the content of the reports that Eirik made after the conservation was finished.         

Conservation of batteries:

"The batteries had heavy deposits on the surface that resembled rust. There were also some holes and penetrations in the steel boxes. The battery terminals and lead contacts on top of the battery had some white deposits and corrosion. The top, which was made of pitch, had a number of cracks. All the acid meters, which is part of the corks, had broken off and fallen into the batteries.

The caps were removed and the batteries were rinsed out with warm water.

The steel cases were scraped clean of deposits using a scalpel. It turned out that the condition was much better than first thought. Large parts of the steel plate still had their fine original black surface. However, there were some minor holes which means that the batteries are leaking. These were sealed with Cosmoloid 80, which is a microcrystalline wax with a melting temperature of 80°C. The steel plates were preheated with a heat gun and melted wax was poured into the holes.

The battery poles with connection points were cleaned by knocking off the deposits with a small hammer. The battery cells were filled with Fluidfilm Liquid A, which is a thin lanolin oil.

The following materials have been used in connection with the conservation:

Cosmoloid H80 (Microcrystalline wax)

Fluidfilm Liquid A (Thin lanolin oil)

Loctite Repair Extreme ( Glue used on corks and acid meter tubes )»

Starter battery before preservation
Start battery after conservation
One of two starter batteries after preservation
One of the starter batteries after conservation at the Museums Spesialistene.

2023.06.12

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It is time again for summer and holidays. There will still be some work on the cockpit section in the coming months. When the plane was raised, the pilot's seat was completely corroded. Fortunately, everything was suspended, brackets, armrests, much of the hydraulic system, as well as the reinforced plate still intact. This summer's project will be to make a new tubular frame for the seat.

This spring we spent time reassembling equipment that had previously been removed from the cockpit and nose sections. Much of this is smaller details such as contacts and switches that do not show up very well in the big picture. By late autumn, we expect to have finished this reassembly. We will then permanently reassemble the cockpit and nose sections. There will then still remain some large and continuous systems that must be fitted into these sections.

We have been on a trip to Hungary to visit two businesses there that may be relevant to help us with work on the center section.

We have been out on the fjord several times this winter and this spring to look for the parts that were left on the bottom of the fjord when the plane was raised. The search shows us that the parts are still down there. The challenge is to get divers with the right qualifications to retrieve the parts for us.

A finer copy of the seat that we will rebuild in aluminium. In the picture, the hood plate is not fitted.

We have been out several times looking for remaining parts on the bottom of the fjord.

2023.01.08

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Efforts Heinkel He 115 has in the past year been affected by the need to complete other projects. This is both for reasons of space in the workshop, and of the need to be able to move things around before work on the museum's new building is started.

Nevertheless, continuous work has been ongoing at He 115. Work on preserving parts has continued in the same form as before.

We have now come so far in this work that we will now shift our focus from preserving components from the Kanzel and cockpit, to reassemble these parts in the aircraft. Initially, we will prioritize parts taken from Kanzel. As we now get more space around us in the workshop, we will also reassemble the Kanzel and cockpit sections.

When the aircraft was raised in 2012 was the big cassette, where in it was stored 5 PCS. M.G. 15 spectacle magazines, completely destroyed. Fortunately, we have photos of the remnants that were left of the cassette. We also have three black and white photos showing parts of this magazine. We have also benefited from an overview drawing which, among other things,. shows this cassette. After a lot of good thinking, as well as good craftsmanship, we now have a copy of such a cassette. This was built in the workshop and also consists of some remaining parts from the original cassette. It will now be fitted into the Kanzel.

Heinkel He 115 the project is approaching the time when it will need a fully renovated center section to move forward with the project. The center section is a large and complex structure. Fortunately, it has not sustained major damage after its stay on the fjord bed. Nevertheless, there is corrosion damage that must be repaired. There are also complicated joints where both steel and aluminum are riveted together. These must be opened both for cleaning and to prevent further corrosion.

The center section is the hub of the aircraft. All the aircraft's main parts are attached to this. Therefore, we must be sure that we do not have to dismantle this at a later stage to repair corrosion. We will now consider several solutions for who will, and where the work with the center section is to be, is performed. There are three main options here, either to do all the work, self, do the work yourself with the help of others, or outsourcing the work to an external commercial actor.

A lot of work has been done this winter to map out how the center section is built in detail. Furthermore, we have obtained a detailed overview of what needs to be done in terms of work on the section. The scope of work has been broken down into many different job packages with associated descriptions and photo documentation.

Before the museum's construction work starts, we have to cut out for access through the concrete walls in the hall where the center section is now stored. This is to be able to drive the center section out of the warehouse.

Egil Thomsen working on a cassette for M.G. 15 spectacle magazines
Siegfrid Hernes and Egil Thomsen rivet reinforcements on the outside of cassette for M.G 15 spectacle magazines
Cassette for storing M.G. 15 Spectacle magazines trial mounted in Kanzel
The cassette for M.G 15 the glasses magazines 3. June 2012
The center section, there has been a lot of work this winter on mapping the need for repairing corrosion damage

2022.06.14

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We have lately been working mostly on preparing to move the center section out of the concrete hall and into the workshop.. This is because we will start work on repairing local corrosion damage in the center section. These lesions are mainly localized to the areas within the wing, float and engine mounts. This will be a time consuming job. If we are lucky, we will not have to do other and more intrusive work on the center section. Ultrasound examinations, as IKM Inspection AS has done for, shows us that fortunately there is little corrosion on the most complicated parts of the support structure in the center section.

The center section will take up a lot of space inside the workshop. To free up this space, it has been a priority to work with the Caproni nose section. The latter has of course had some consequences for the progress of the work with He 115 cockpit and nose section. The first relocation of the center section inside the concrete hall has now been completed. The plan further now is to saw out a five meter wide opening in the west- the wall of the concrete hall. Through this we will then roll the center section. When the center section is out of the concrete hall, we must immediately close the opening in the brick wall. The process of sawing out the hole in the concrete, move out the center section and then close the hole in the concrete wall must happen in one and the same day. We plan to do this during the autumn.

The center section has been moved and is here ready to be rolled further out of the concrete hall
The concrete wall to be sawn out to make room for the exit of the center section

When we raised the plane, we found in the Kanzel parts of a measuring instrument that we did not understand the use of. We understood that these were parts of a drift meter, but we were unsure how this had been mounted in the plane. The drift meter was then given a temporary preservation and then stored. On the starboard side at the front of the Kanzel there is a rectangular hatch. Behind this hatch we found the remains of a magnesium bracket and the remains of a cloth cuff. We did not understand what this hatch and bracket had been used for. In pictures by Heinkel 115 this hatch appears, with few exceptions, as closed.

Then we are lucky and are contacted by Marc Bressan who lives in Switzerland. Marc Bressan has a very solid knowledge of and experience with German aircraft instruments. He had restored and built up a complete drift meter himself. Marc offered us to share with us his extensive knowledge and documentation about He 115 Tribsgërete. He sent us a bunch of pictures that showed us what a complete system should look like and work.

The information we received from Marc showed us that we needed a lot to have a complete system for drift measurement.. Marc now offered to complete and donate to us parts he had left over from the restoration of his own Tribsgërete. With these parts we were now in possession of a complete system for drift measurement. The drift meter that we found in the plane in 2012 was only temporarily preserved and did not open up for interior cleaning and preservation. Marc opened this for us and did a thorough internal preservation of the meter for. This facility for measuring drift, will when these are mounted in the aircraft show these well again forward in the Kanzel. We owe Marc Bressan a very big thank you for the help the project has given.

This equipment, along with everything else we have found on board, shows that a very well-trained crew was needed for them to be able to operate and benefit from all the aircraft's systems.

The tube to the drift meter system was the only one we found when we were in 2012 raised the plane.

The following pictures we have mainly received from Marc Bressan:

This base plate that we were missing was donated to us by Marc Bressan
Same base plate finished lacquered
These are the parts that make up the base plate
The base plate is test-mounted on the starboard side of the Kanzel.
Behind the black hatch there should be a canvas bellows through which the pipe should be inserted.
The base plate is test-mounted in Kanzel.
The top of the tube was missing, this we also got donated by Marc Bressan.
The top of the tube.
Top sample mounted on the aircraft's original tubes.
Marc Bressan opened and preserved the inside of the tube for us.
From the inside conservation work on the pipe.
The lens was removed and cleaned.
Pictures of the pipe after Marc Bressan has finished preserving and completing missing parts.
Detail photos of the top that we received as a gift from Marc Bressan.
Original parts mixed together with parts that we received as a gift.
The lens is reattached after cleaning.

2021.01.11

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The year 2020

The year 2020 was a good year for Heinkel 115 the project through which many positive things have happened.

We have for several years had restrictions on the type of work we could do on the plane. During the past year, the Armed Forces Museums have largely been abolished these restrictions.

It formerly Heinkel 115 the steering group has been closed down. As a replacement for this a support group has been established with members from the Friends' Association, as well as two conservators engaged by the Jærmuseet. This solution gives us that working with the aircraft an easy access to a very versatile experience and competence.

It also in over the past year there has been a unanimous understanding that it can be necessary to make some interventions on the center section. This mainly applies to supporting beams, with associated attachments for wings and floats. This has led to it now is working to find solutions for how such work can be completed. Our goal is still to make small interventions and preserve as much as possible much of this section.

It has Throughout the year, work has been done on a number of different sub-projects. I de cases where equipment is completely destroyed, we integrate what may be left of the original equipment in the new one being built.

An example is the work that has now been completed to build a new hydraulic hand pump for flap and opening of bomb hatches etc.. Of the original pump, only handles remained, mechanical transfer to stamps, pistons and end caps. Said parts are built of high-quality materials and had done well down on the fjord bottom. All the pump housing and cylinders, on the other hand, were almost completely corroded.  Pump housings and cylinders have now been rebuilt and the pump can now again be used to pump oil. The above mentioned remaining parts have been integrated in the new pump.  

It is also throughout the year made a new instrument panel for the cockpit. Although most of the original panel was gone when the plane was lifted, will still the new panel be equipped with original instruments. These are instruments that were found in the aircraft and which has now been preserved and in some cases partially rebuilt.

Through At the same time, we have gained a good overview of the work with the instruments which instruments and other similar equipment have been in the cockpit of the aircraft and nasal section.

Another of the bigger things that have been done through 2020 is the work of rebuilding the system for suspension and transmissions from the rudder and toe pedals. Also here is remaining original parts have been integrated into the new finished product.

It has also become worked hard to preserve original electrical equipment. These are things like circuit breakers, switches, terminal blocks and many other smaller electrical components. The work is a time-consuming work of patience that is now really beginning to show again in form of finished preserved parts. These have either already been reassembled in the plane, or in stock ready for use..

The big and extensive cableway along the port side of the cockpit was also completed early in 2020

The outer the section of one engine stand was completely missing when the plane was lifted in June 2012. This is because one engine was salvaged before the plane sank in December 1942. It the missing section has been rebuilt during the autumn. At the same time, we have what we have of original brackets and other equipment for the motor brackets have been reassembled on the engine jacks.

Photo sharing archive and documentation is a time-consuming task that runs as long as the project ongoing. It is also through 2020 been working a lot on these things.

When the plane was raised in June 2012 a few smaller parts were left at the site. It was last year, several ROV dives were made at the crash site in Hafsfjord. Although the plane was unusually complete sea ​​wreck to be, also missing our plane things that can not be found elsewhere. A new application has therefore been sent to raise He 115 parts from Limingen.

2019.09.01

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A new summer is almost past, and it is again time to think about what work needs and should be done on our Heinkel He 115. The situation is now a little different than what the was before we finished the work before the holiday

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. There is an ongoing extensive and intensive works to finalize museum Bf 109 project. This work will be for a shorter period lay claim to very much of the area in the workshop. Accordingly, it be small area free for other work . We must, therefore, in this period limit our work into smaller parts that can be handled by the area we currently have available.

This restriction in the workshop area gives us extra time to think through what alternative methods we have available to preserve the aircraft originality of the longest possible period. It is the second and major players, that work to preserve the originality of sjøvrak of aircraft, done a lot of work to develop methods to stabilize the compositions of these wrecks. A method they have developed is to give the material an electrolytic treatment. We will in the future, and in cooperation with the other parties involved in He 115 project, make a new survey of which of the methods developed that may be relevant for our aircraft. This work will require that we make a wide range of requests among the actors has been involved in the development and use of the different methods.

2019.03.03

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We had 11 January pleasure of having Christian König visiting. Cristian has previously written three great books on various German planes, including Arado 196. He is also famous as a writer in a number of reputable fly journals. The occasion for that he now wanted to take a closer look at our Heinkel He 115, his plans to write a book about, among others. this aircraft. His knowledge of German planes are very impressive and he has given us new information on both parts as belonging to the plane, as painted markings on aircraft

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. Surface cockpit is a label with the number 87 and text ROTRING standing right under this. We have previously not known to the meaning of this. Christian has been able to establish for us that's 87 reported that it would be filled aviation gasoline of quality A2 or A4. ROTRING says ROTRING oil made from INTAVA had to be used on engines. He works also work to find information on the pilot's seat has been designed. Pilot's seat is provided with a reinforcing plate which we are uncertain whether stood under and behind the seat, proportions if the disc has been an integral part of this.

Siegfried work steadily ahead with conserving and as far as possible to rebuild the instruments that we in June 2012 found in plane. Some of these are now finished and ready for further use in the new exhibition space our. We learn along the way constantly new things about which instruments hav been in use for aircraft, and not least about how these worked.

When inventory in the nose and cockpit sections were dismantled, we saw that it was missing several støypte constructions. Including suspension of rudder pedals. We are currently working to make copies of these suspensions. These copies will be used as “plugs” in støypeformer for the parts that we lack. This is time-consuming work that we previously did not have personal experience with. Fortunately lacking not all parts of pedal suspensions and some of these we can after some repair use that plug into a støypeform.

Efforts Heinkel He 115 project since January 2018 been ruled by the Armed Forces Museum is in a process where they will consider future ownership of equipment that is lent on landfill agreements. We therefore remain temporarily any restrictions on working with plane.

Christian König on his visited with us 11. January

Marking telling the petrol and oil quality to be used on aircraft.

How so fygerens seat out when it was taken off the plane 3. June 2012. Christian König is trying to help us with information about how the seat has set out before the plane crashed in 1942.

Done rebuilt Double drückmesser FL 20512-2
. The instrument has been cleaned and the brazing between the capillary tube and shows repaired. Beacuse is wiser and dial again. The instrument now appears tilnærmert in the same condition as when the plane crashed.

Vario finished overhauled. The instrument has been thoroughly cleaned and has a new glass, wiser and locking ring for glass.

Recently pbegynt combined evaporator and voltmeter FL 32502-3. There were two of these instruments in the airplane. There the picture we found advancement in Kanzel, while others still stood assembled in telegraphist dashboard.

A poor image of the arrangement which forms the suspension for one rudder pedal. We are currently working to make plugs for use in støypeformer of parts that we are missing from this suspension.

One of DLEN from suspension for siderorspedane who let themselves be frightened and that after some work can be used as plug in a noisy kind of 4 corresponding new brackets.

 

2018.05.17

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Efforts Heinkel He 115 the project has since January been ruled by the Armed Forces Museum is in a process where they will consider future ownership of equipment that is lent on landfill agreements. We therefore still some temporary some restrictions on the work of Heinkel He 115 project.

In addition, the air temperatures in winter has been unusually low here on the south west coast
. The cold has made unattractive to continue the work that we were doing out in the Heinkel hall

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. This work consists in cataloging the small parts that are not yet fully registered
. This work will be continued when the summer's activities begin to wane.

Heinkel 115 the project is allocated a separate room in the museum's exhibition
. Here we are working continuously to create an exhibition around the aircraft and selected smaller parts this.

2018.01.10

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So it's a new year-end has passed and we who work with Heinkel He 115 project wish all of you who read this record a happy new year.

We have started the new year in the same way as we finished the last, registering and creating archival references for a multitude of the small parts

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. These are parts that have not yet been registered and that we now have had lying around the various boxes
. The work is painstaking, but also interesting. This is because among these small parts are many special touches and things. These can put both knowledge and imagination to the test when we're deciding what function they had in the plane.

Unfortunately at times really cool to work out concrete hall, and Jærbunad with accessories is an absolute necessity that one over a bit of time to be able to stay in the hall.

At the last meeting of the Steering Committee for the Heinkel He 115 project, it was decided that we who are actively working with plane, in collaboration with personnel from the Armed Forces Museum and California Museum, shall examine the plane and make a plan for what to do with the plane's main parts.

It was also decided that we can begin the work of rebuilding the nose and cockpit section.

For the sake of a better presentation of the Heinkel He 115 project in the museum's exhibition, we are now allocated a separate room to showcase parts of the aircraft and to present the project. We are now working to prepare the room for this exhibition.

We also want to get to a better presentation of Heinkel tail, nose and cockpit sections in the exhibit. To achieve this, it must be made a major rearrangement among the museum's aircraft. The plan is that this swap is to do the museum's German planes, in conjunction with the museum of things from the allied war effort, to be collected at a location in the hangar
. The changes will be labor intensive. This will, for a limited period at the expense of work Heinkel He 115.

 

Among the parts we tub cataloged is telegraphist radio direction-finding compass

Inside the radio compass bearing was on deviasjonsskiven found an inscription showing that the aircraft shortly before the crash landing had another acquaintance code than what it had when it was wrecked.

Roar Henriksen started to record parts

Unfortunately, there is often a cold amusement and winter working out in Heinkel hall

 

2017.10.24

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We have now started the process of sorting and organizing a number of large and small parts that we have not been placed in the right place in the storage rack out in the Heinkel hall

. This is a collection of large and small parts that either were expecting to be marked, cataloged and parts that we have moved from other locations and out in the dry hall. We use this opportunity to reorganize the way we now have placed a part of what we have stored in premises
. We hope that we will manage to get done done much of this work and at the same time do something after sealing of the end walls before winter temperatures make it too unpleasant to stay outdoors in Heinkel hall

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Parts awaiting sorting and storage