News

Throttle Box Progress



Steady progress with the Throttle Box build includes addition of Friction Device Star Wheel produced by Laser Prototypes Europe Ltd of Belfast.  This is a Alumid resin aluminium composite produced from an original drawing.

Also fitted are the throttle lever cam supports which have been machined from solid by Cambridge Precision Ltd of St Neots Cambridgeshire, these were yet another complex component part of the throttle box which required much thought in their  production.

CamsCams 4SC02326Box with cams 2Friction Device1Friction Wheel

 

 

Project Update – 2 Nov 15

Dear all

Some more progress to report:

Thanks to SAPA Profiles UK, who kindly donated the time and materials, we now have sufficient lengths of special extrusion for the outer bomb bay keel structure. These are aysmmetrical ‘U’ section channel which attaches to the bottom of the bomb frames and which the outer bomb doors are attached. These are an integral part of the bomb bay structure without which we cannot proceed to the build stage.

 

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Stirling Trim Box assembly

We’ve just had the trim box assembly modelled up using original drawings as the basis. The results are below and we will be getting the individual components 3D printed ready for casting.

Stirling trim box Stirling trim box 2

Additionally, the Project has achieved a major milestone in that we have drawn up and fabricated a prototype bomb bay frame as a proof of concept; this is our first piece of fuselage structure proper! With the assistance of Marshall ADG (Land Systems), the Project has secured the use of a laser cutting facility which will enable us to accurately produce components rapidly and will significantly cut down on the time taken to fabricate such components and work is progressing to design the required fuselage build jig which will be a significant investment for the Charity. Below are some photos of the seat beam assembly, the prototype bomb frame and the draft fuselage jig design.

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Donated Stirling items – 25/7/15

A quick update to show some parts from LK488 and EE975 that have been donated to the Project by Ian Carter. Some interesting items which we’ve identified are the throttle box cams, the remains of an elevator trim tab and the casting from the Flight Engineers fuel valve mounted at the forward spar. The latter is slightly damaged but certainly good enough to either repair or make good enough to use as a pattern.LK488 parts donated by Ian carter 2

Stirling Aircraft Project on the road

The Project recently attended 2 Veterans events, the first was at the RAF Museum in Hendon with the second following shortly after in Godmanchester Cambs. The latter was especially well attended and a special presentation of an original piece of MacRoberts Reply, was made to Donald Jeffs who is the last remaining person who’d flown on this famous Stirling. The pics are below:

Veterans Day Hendon Veterans Day - Godmanchester Veterans Day - Donald Jeffs

 

Proposed bomb bay jig

Here is the first image of our proposed bomb bay jig.  There is more work to be done on the design but things are coming together. We have decided to raise funds specificaly for this very important piece of kit so that we can  commission it to a suitable company for it to be built in kit form

First picture of our proposed bomb bay jig

First picture of our proposed bomb bay jig

to our needs. If you feel you would like to contribute to our jig fund please follow the directions for donations on the website.   Although we are unable to write to each contributor  rest assured we are most grateful for each donation however small.    K

 

Cambridge Precision machining update

Today our Chairman visited Cambridge Precision for an update on the parts they are making for us.

They have machined a new Rudder control spindle using our original as a pattern. The spindles differ in lentgh as although they work in tandem , they perform slightly different tasks.

20150427_135425The  small dome shaped part in the image above is one of a pair that  will screw onto the top of each spindle when fully assembled.  Attention can now be payed to machining the tops and bottoms of each  of the pyramid shaped pedal mounts to recieve bearings.

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This image shows the first of the throttle box cam followers that sit on the upper curve of the throttle box. Each of these is different and required a seperate  C.A.D  process.   The next stage for these is for them to be clamped in soft jaws to have the sacraficial material trimmed away leaving the desired component.         K

Progress update

Well we’ve now fully moved into our ‘new’ workshop and have started production again albeit in a small way. Fingers crossed we can be left alone to make some steady progress…..

The photo below show the slots in the P1 seat beam to allow the rudder control cables to pass through the structure from the rudder pedal bellcranks. the picture also shows some original Paxolin fairleads recovered from BK710 which will be used as a pattern to make a pair for the outboard P1 seat beam.
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We’ve also mounted the remains of the forward escape hatch opening from LJ628 on a display board to show it in context.

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On the to do list:

Design of the bomb bay jig is in progress
CAD drawings of the bomb bay structure are being finalised
throttle box is being worked on and is awaiting manufacture of some parts to progress it towards completion.

New Workshop!

We have finally moved into our new workshop thanks to our landlords Urban & Civic at Alconbury and still under the same tenancy arrangements as previously. Our new building is far more suitable to our needs and is exactly 100′ long by 23′ wide so big enough to build the forward fuselage.

We still have a lot of sorting out to do, not least in plumbing in our compressor and pneumatic ring main for our air tools, but with any luck we should be back up in full swing within a couple of weeks. 

Additionally, within the last week, we have had  a meeting to discuss the design of the jig for the bomb bay and which in time will support the production of the forward fuselage, this was very productive and the detail design is now under way. With such a large and complex assembly the jig in turn will also have to be sturdy and consequently will be heavy! More news as the structure progresses.