New AuthentiKit throttle quadrant introduces hydraulic damping technology

AuthentiKit is proud to launch a new throttle quadrant for the P-40B Tomahawk making a total of three aircraft types now supported with throttle quadrant and trim wheel sets. Earlier in the year we introduced the combined elevator and rudder trim wheel set for the P-40B which sits alongside this control. This particular quadrant has something a little extra up its sleeve however which isn’t immediately obvious from the picture.

A smooth but firm resistance to movement is very important in the design of a throttle quadrant in order to give a natural realistic feeling. Particularly for a vintage or classic aircraft, the ideal is for the sim pilot to feel that they are engaging with a mechanical object and that a modest degree of effort is required. To date this has been achieved in AuthentiKit designs through the use of cork friction pads and felt friction plates. Not only are these prone to wear over time, but cork can squeak under strong pressure.

Rotary silicon damper with 400g/cm resistance

In the pursuit of flight control realism AuthentiKit has introduced a new technology to supplement the friction approach. Rotary dampers contain liquid silicon which is forced through channels as the damper is rotated. Depending on the specification the resistance can be tuned from a few grams to many kilograms. After testing a great many variants, AuthentiKit has now chosen a suitable damper design from Wixroyd in the UK which just hits the sweet spot of resistance and natural feeling throttle movement.

This damping technology is likely to make an appearance in many more AuthentiKit products. Not only is it very well suited to throttle quadrants, but the Spitfire chassis (gear) lever currently under development is being modified to accept the new damping system. You can see more about how the damper is incorporated into throttle designs in this new video.

ATK1R308 M3 machine screw round head x 8mm

M3 phillips head machine screw with round (or pan) head x 8mm long zinc plated

  • Manufacturer: Various
  • Product ID: Various

One or our smallest screws these are used to hold down a rotary damper

Supplier Links

https://www.ebay.co.uk/itm/274428339832

Indicative Pricing With Allowance for P&P

These things are tiny any usually sold in packs of at least 20 for about £1.50. You’ll actually use very few of these, perhaps 4 making an effective price of around 40p each.

£0.40

Substitutions

These must be a small round head as some designs include cavities for the head. You could use a non phillips head fitting but it isn’t recommended as the screws are just a bit harder to handle.

ATK611: Rotary Damper 400

Rotary bi-directional hydraulic damper 400gf.cm

  • Manufacturer: Wixroyd
  • Product ID: Q3044

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.

Supplier Links

https://www.wixroyd.com/en/catalog/access-components/hinges-dampers/rotary-dampers/rotary-dampers/q3044/g+m+c+s+a

Indicative Pricing With Allowance for P&P

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

£10

Substitutions

Full size tubes are fine as well if a bit unwieldy. Just check that it’s white not clear.

Major Performance and Durability Update

Over the last few months I’ve made numerous incremental improvements to various AuthentiKit components. The changes have been to increase strength and longevity as well as to improve performance. An example is the MagHall 6803F unit that is used to read positional axis data. It was found that over time a little slack could develop where the lever fits to the MagHall unit causing an unsatisfying loose feel in use as well as impacting the accuracy of the positional data. In the render here you can see how the peg now has extra mesh points that make for a much more secure mating of the two parts.

Cosmetic improvements

Finally the Spitfire MkIX prop lever has the recessed lettering with AIRSCREW CONTROL that can be filled with white silicon. The lettering is also the correct way round unlike the version I made for the Spitfire Mk1A. The Mk1A also has this new corrected prop lever.

AIRSCREW CONTROL is now displayed on the prop lever – in the correct orientation

Improved Sourcing Information

As well as parts updates, there is now a new clearer Bill of Materials format with improved sourcing information. Every item used in an AuthentiKit product now has a unique part code and there is a sourcing page on this website with information about that code. An example is the microswitch used in the flaps levers. It has part code ATK206 and you can find out more about it at authentikit.org/ATK206/

Every single download refreshed

Some of the new parts have been shared on Discord already but in general the downloads have not yet been refreshed with these new parts as I wanted to test them over time. Today every single download has been refreshed either with a new Bill of Materials or new parts. Here is a list of changes and here is the download link.

  • Spitfire MkIX Starter Kit A
    • There is a new bill of materials
  • Spitfire MkIX Add on Kit B
    • New Bill of Materials
    • The following parts have been strengthened to reduce the chance of the jaws cracking if overtightened. Printing the jaws at 100% infill is still recommended.
      • Strengthened 27mm clutch grip – also now a 3MF file
      • Strengthened extension arm short – also now a 3MF file
      • Strengthened extension arm long – also now a 3MF file
      • Strengthened monitor pole clutch grip 35 – also now a 3MF file
      • Strengthened monitor pole clutch grip 48 – also now a 3MF file
    • Upgraded MagHall 6803F – Cap, Base and Peg are all improved
    • Upgraded Throttle lever – improved mating with MagHall peg
    • Upgraded Mixture lever – improved mating with MagHall peg
    • Upgraded Prop friction disc – improved mating with MagHall peg
    • Upgraded Prop lever – includes AIRSCREW CONTROL lettering
  • Spitfire Flaps Lever
    • New Bill of Materials
  • Spitfire Mk1A Quadrant and Trim Wheels Kit
    • New Bill of Materials
    • Upgraded MagHall 6803F – Cap, Base and Peg are all improved
    • Upgraded Throttle lever – improved mating with MagHall peg
    • Upgraded Mixture lever – improved mating with MagHall peg
    • Upgraded Prop friction disc – improved mating with MagHall peg
    • Upgraded Prop lever – includes AIRSCREW CONTROL lettering
  • P-40B Tomahawk Elevator and Rudder Trim Wheels Kit
    • New Bill of Materials
  • Universal Hub Starter Kit
    • New Bill of Materials
  • Universal Hub Upgrade Kit
    • New Bill of Materials
  • Rig Extension A
    • New Bill of Materials
    • The following parts have been strengthened to reduce the chance of the jaws cracking if overtightened. Printing the jaws at 100% infill is still recommended.
    • Strengthened 27mm clutch grip – also now a 3MF file
    • Strengthened extension arm short – also now a 3MF file
    • Strengthened extension arm long – also now a 3MF file
    • Strengthened monitor pole clutch grip 35 – also now a 3MF file
    • Added monitor pole clutch grip 48 for fat pole monitor stands
  • Instrument Panel Mounting System
    • New Bill of Materials

ATK1R450 M4 machine screw round head x 50mm

M4 phillips head machine screw with round (or pan) head x 50mm long zinc plated

  • Manufacturer: Various
  • Product ID: Various

Used to provide a more interesting bolt head for external parts. This is a rather long and currently nt commonly used screw. The P40B uses two of them in the quadrant.

Supplier Links

https://www.ebay.co.uk/itm/252499953593

Indicative Pricing With Allowance for P&P

So far these is only a need for two of these and you can order two via the link above for 75p each. You might as well buy a few more for little extra cost in case we use them again. As a compromise on indicative price I’ve suggested 50p each.

£0.50

Substitutions

Allen key head looks good too. Stainless steel or black is nicer but costs more.

ATK1R412 M4 machine screw round head x 12mm

M4 phillips head machine screw with round (or pan) head x 12mm long zinc plated

  • Manufacturer: Various
  • Product ID: Various

Used to provide a more interesting bolt head for external parts. A rarely used length – currently just the P40B trim wheels use this.

Supplier Links

https://www.ebay.co.uk/itm/252499953593

Indicative Pricing With Allowance for P&P

These are quite a rarely used size which makes the unit price effectively more than the other lengths of this machine screw. You could just buy a pack of two as that is all that is used so far in AuthentiKit controls, which would make these about 75p each. As there may be occasional further uses an indicative price of 35p has been chosen.

£0.35

Substitutions

These must be a small round head as some designs include cavities for the head. You could use a non phillips head fitting but it isn’t recommended as the screws are just a bit harder to handle.

ATK1C425 M4 Countersunk Screw x 25mm

M4 Countersunk flat head phillips head machine screw 25mm long

  • Manufacturer: Various
  • Product ID: Various

Use either zinc plated or stainless steel. Get philips head if you can as the PH2 but fits them very nicely, otherwise pozidrive will do. These tend to only get used with Roten6003 units where for stability you need the screw to go all the way through the base with some clearance.

Supplier Links

https://www.ebay.co.uk/itm/252355920381

Indicative Pricing With Allowance for P&P

These are not a common length with AuthentiKit designs and as you tend to have to buy packs of at least 10 the unit price is effectively higher than other lengths.

£0.25

Substitutions

Pozidrive is an option if you can’t get phillips head.

ATK1S210 M2 Self Tapping screw x 10mm

Black self tapping M2 screw x 10mm long (round head, not flange or countersunk)

  • Manufacturer: Various
  • Product ID: Various

These sorts of screws often come in PC repair kits. Black is far preferable to silver coloured but fortunately these screws usually come in black.

Supplier Links

https://www.ebay.co.uk/itm/383056913339

Indicative Pricing With Allowance for P&P

These things are tiny any usually sold in packs of 50, 100 or even 500. Unfortunately we don’t use these much in AuthentiKit controls and you will probably only use 2, maybe 4. You may be able to get a pack for as little as £2 putting the unit price at £0.50. With a bit of luck though you’ll have some lying around.

£0.50

Substitutions

You can get away with as little as 5mm in length and 8mm at a push. You’d probably also get away with M2.3

ATK1R212 M2 machine screw round head x 12mm

M2 phillips head machine screw with round (or pan) head x 12mm long zinc plated

  • Manufacturer: Various
  • Product ID: Various

One or our smallest screws these are used in the mClick component and other small items.

Supplier Links

https://www.ebay.co.uk/itm/274428339832

Indicative Pricing With Allowance for P&P

These things are tiny any usually sold in packs of at least 20. You’ll use perhaps 8 of these in a full cockpit.

£0.30

Substitutions

These must be a small round head as some designs include cavities for the head. You could use a non phillips head fitting but it isn’t recommended as the screws are just a bit harder to handle.

ATK708: Craft wire 0.5mm

Strong thin craft wire used for pulling wires through silicone tube.

  • Manufacturer: Various
  • Product ID: Various

Dragging silicone wires through silicone tubes, as we do with the Spitfire MkIX throttle quadrant, is not easy as the friction causes the wire to stick. Craft wire like this is a good solution. A length of at least 60cm is needed. Aluminium has good strength for this.

Supplier Links

https://www.ebay.co.uk/itm/313572101136

Indicative Pricing With Allowance for P&P

You’ll find short lengths on eBay for £1.

£1

Substitutions

0.7mm will do at a push.