This device is used to provide detents in throttle quadrants, flap levers etc. The spec for this ball plunger is an 8mm diameter barrel. You can get these in steel and brass but the technopolymer (the ‘KD’ suffix) version is recommended to avoid excessive wear on the printed parts. For full dimensions see the link below to Berger tools and select d1=8 and KD as the material.
This is used in the Spitfire spade stick to group the wires emerging from the angle bracket and stop them sliding through any further into the body. 2mm or 2.5mm width is fine. They’re likely to be used again.
This device contains liquid silicon which resists movement and so creates a smooth mechanical resistance to the rotation of levers. There are many manufacturers of these dampers and hopefully you will find an equivalent in your region. Check the dimensions on the Wixroyd page to ensure it is an exact match. There are weaker versions of this damper which have damping forces of the order of 100gf.cm but this offers much more substantial resistance.
The unit price of this part is only £2.18 + p&p + tax. However I have yet to find a supplier who is not focussed on businesses and higher volumes, so at present it is rather expensive to source. You need to spend at least £10 and then with small order surcharges and delivery you end up with a bill of just under £30. You can choose not to get this part as it won’t prevent the AuthentiKit device from working – it just won’t feel as good. So far only one of these is used in AuthentiKit controls (P-40B quadrant) but it does add a nice feel so I intend to add it to several devices. As an indicative unit price, let’s say you will use 3 of these over time making a unit price of £10
Although this damper can usually be ommitted from a control without loss of functionality, it makes a huge difference to the feel of the control. I am trying to find alternatives to the Wixroyd damper as it is so expensive. There is a possibility that the ACE FRT-C2-301-G1 from ACE Controls can be adapted although it isn’t exactly the same. It appears that only the mounting is different.
IMPORTANT: It is important that the felt is just 1mm thick and no thicker. Expect it be to around 1.1mm when measured with calipers including the non-stick backing paper. I have heard that the above product from Amazon can vary and someone found that their felt was 1.3mm which was too much when used in the P40B and caused the levers to stick. In order to have a definitive way of measuring thickness I have made a set of clamps which you can fit over calipers creating a surface area of 20mm x 30mm which can be used to lightly press against the felt. Download the clamp design from this link. This is how it should look when you use them.
Indicative Pricing With Allowance for P&P
You only need small lengths and you should be able to by on eBay by the metre though suppliers come and go. I’ve seen it for around £5/metre inc. postage
Wider is fine as you cut shapes out of it. You may be happy with grey rather than black though black usually looks best. 1mm thickness is essential.