“Yellow River” – Type 83 Radar

These photographs were kindly donated to us by  Mr Ernest Miller. They show a “Yellow River” Type 83 Bloodhound Mk1 Radar and were taken at at the test site near Leicester, about 1959. Ernerst said that the site was in the middle of the sewage farm which did tend to keep visitors away.

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A basic drawing showing the major components can be seen here:
http://www.radarpages.co.uk/mob/bloodhound/bloodhound4.htm

A YouTube video showing the radar deployed at RAF North Coates is here:

Two references to doucments held in the National Archives are:
Ref: AVIA 6/1914 Effect of carcinotron jamming on radar type 83 (Yellow River) – 1960
Ref: AVIA 54/1507 Equipment Radar A.A. No.3 Mk.9, `Yellow River’: development – 1947-57

 

Workday 19th May 2018

T86
The plan is to complete all the prep work for a repaint of the T86 this summer still holds good. The work being undertaken is thorough and includes the removal of the cabin wheels and treating the chassis corrosion.

Wheel removal
Removal of the wheels from the cabin has proved to be challenging, that is until a torque multiplier was acquired, Pete M’s comment was ‘this is a dream’ following previous weeks that were spent creating all sorts of leverage systems to try and release the wheel nuts.  Here shows the torque multiplier in action.

T86 Removing Wheel with Torque Multiplier wm.jpgOnce the wheels are removed lose paint and corrosion is removed from the wheels, leaf springs, brake drum etc, all becoming much easier. Pete M in action on a leaf spring below.

T86 Removing Corrosion - Leaf Spring wm.jpg

The T86 cabin wheels are in a poor condition due to their age and the extended period the cabin has been in the open. The tyre rubber is perishing and corrosion on the wheel hubs is severe but not terminal. The accompanying image shows the inside of wheel after removal, not much paint left and a decent amount of vegetation! The T86 cabin will not be made road worthy as it does not comply with current vehicle regulations etc. but it will still need moving short distances and the perished tyres will not be suitable for that purpose in the longer term. We are therefore on the lookout for part worn 10.00 15 tyres – please anyone?

T86 Wheel Original Condition 2 wm.jpg

Replacing the cabin floor
Dave and Pete J have replaced the front cabin floor which can be described as a precision job. The first image shows the floor fitted before moving on to priming. To complete the new floor the lino, or a more modern version of, will be laid over the wood with metal fillets to cover joins on the wheel arches.

T86 New Floor Front Cabin 2 wm.jpg

T86 Floor Primed Front Cabin 1 wm.jpg

Preparing the aerial assembly
Neil continues with what looks to be a never ending task of rubbing down all the aerial system components and the rats nest of the wave guide assembly.  Here is Neil being ‘embraced’ by the aerial system!

Refurbishing components
Many of the smaller components are being refurbished off site as they are easily transported! Two accompanying images show the handles for the receiver cover and the pedestal support pillars from the rear of the cabin, before and after paint stripping.

T86 Rx Cover Handles wm.jpg

T86 Pedestal Anchors wm.jpg

F16 (400Hz) Power Supply
We gave the power supply a good soak test on Saturday by connecting its output to 115V incandescent bulbs; it ran for several hours without a problem. ge. At a date to be decided a test run of driving a few synchros will take place.

T86 F16 on Soak Test wm.jpg

LCP
After several weeks of being U/S the LCP (simulator) was run up and as per last week remains serviceable with the exception of a vertical sync issue on one monitor which has been shelved to get on with other work.

Pete H