Questions answered

Some great questions were asked by a prospective client, I thought it worthwhile to share them here with their answers. I am sure they will help others too!

Q1. Are all electrical parts required to connect the physical controls of the cockpit such as wires, switches, hall sensors, encoders, potentiometers, interface boards etc. documented with part numbers together with retail sources? Ie. How will the builder know what part will fit, perform the required job or where to buy them?

A. Yes they are and while not definitive, as it depends on your location, guidance is given on where you might source them.

Q2. If one of the parts purchased via your available kits such as the 3D printed parts or the metal parts is accidentally damaged or lost by the builder, do you sell parts from these kits as single items in these circumstances to replace the original part.

A. Unfortunately I cannot break up existing kits as it would render the rest of the kit unusable. The exception to this is the HP MultiJet Nylon parts, which although printed as a bulk order can be reordered on an individual basis. They are very unlikely to break given the toughness but you never know and you could loose or misplace a part. For the metal parts you are given the drawings and CNC cutting patterns so they could be remanufactured individually.

The metal kits are great to reduce cost and there are regrettably very few CNC concerns who will lasercut the thousands of small custom parts required for the build, hence I invested in this for my customers. When the current batch runs out I am unlikely to tackle that again however.

Q3. Has the cockpit been designed with maintenance tasks in mind. Ie. How easy is it conduct maintenance/replacement of the moving parts and computer interface parts once fully constructed or will the builder need to dismantle cockpit shell to gain access to work on loose or worn parts?

A. You would never need to dismantle the fuselage shell to do maintenance. As with all aircraft however once installed some parts are more difficult to get at than others. The loose cradle design with the cockpit floor fixed to the cradle instead of the fuselage allows you to lift it out of the cradle and lie it on its side to access the bottom bits. There is also access from the top, the seat can be readily removed as in the original, the front panel is easy to remove and the rear is open, so yes, mainly things are fairly easy to get at.

Q4. Does the build manual contain details/instructions on how to or when to paint parts during the build? Are paint colour codes specified so builders can source paint reflective of authentic internal/external colours?

A. Yes and yes.

Q5. With regards to VR mixed reality, I would prefer to see my hands in front of the flight instrument panel instead of disappearing behind the virtual instrument panel. This would require that the VR pass through area be extended upwards of the pilots legs to include the physical instrument panel of the physical cockpit. This would require the builder to implement gauges/flight instruments interfaced via electronic/software to MSFS or DCS. Is there a reason why your implementation does not include working physical gauges/flight instruments? Would you recommend NOT pursuing this option based on any complications/incompatibilities you experienced that I may be unaware of?


A. If one ignores the complexity of creating realistic gauges, (and it is not impossible, you will find many videos and blogs describing the process), I still would not go that route. Here’s why:

1. Lighting – When you are flying the effect of lighting, be it nightime or the sun moving over the panel as you manoeuvre, has a massive impact on immersion. I do not want to loose that with a panel that is no longer in the virtual world and keeps a constant lighting which is totally different to the virtual world.

2. When you are flying a WWII fighter aircraft you are not looking at your hands. You are looking outside, and scan the instruments regularly. When you want to look at a map, you look down at your lap where you have positioned the map or kneeboard. There is very little to be done on the panel of the Spitfire, other that adjust the clock (once, pre-flight if necessary), flip the flaps lever (once, when preparing to land), turn on the oxygen (if necessary) and check the fuel status (every 5 minutes or so?). All of these are done intuitively and as I can see where they are and the virtual matches the real, I have never struggled to find them.

So yes, for airliners I would want real gauges and panels and the VR world out the windscreen (if I don’t elect to go screens/projectors anyway) and for modern fighters I would want to see the MFD’s and their buttons. But for the Spitfire?.. not worth it for me in terms of additional work, programming and complexity.


Q6. In one of your demo videos, action is taken to close the physical cockpit door but the virtual door remains open until action is taken to close it within the simulation. Is there not a hall sensor or switch on the physical door to automatically trigger the simulation to maintain synchronization between the physical and virtual?


A. Me being lazy, I have a Hall sensor in the design but never installed one in the prototype. Easily done, thanks for the reminder 🙂


Q7. Do you provide information related to the configuration required of software interfaces for controls, VR googles, FlyingIron Spitfire, MSFS and DCS etc.?

A. Think of our Spitfire as a giant joystick setup. I have created software and preset controller files for: 

1. MSFS2020/4 using the FlyingIron Spitfire and SpadNEXT 

2. XPlane11 using the FlyingIron Spitfire (remember the FlyingIron Spitfire was a result of my request to FI to create it and it was a joint effort with them using my design. That was then ported to the magnificent version in MSFS2020 and soon in the much anticipated version for MSFS2024 which I have no doubt is going to blow the socks off everyone!)

3. DCS World

4. Presets and guidance for setting up Force Feedback and the gForce-Seat through the use Arduino code and Simtools.

MSFS2024…YES!!!

Well folks, it has taken a while but I can finally recommend upgrading your Heritage Flight Simulator to MSFS2024. This has been made possible by the following:

Overall the flight experience and environment is so much richer in MSFS2024 than we have seen anywhere else before. The developer environment also enables much more detailed flight physics and characteristics. FlyingIron is working hard at a paid upgrade to the Spitfire which will incorporate this as well as a number of new models:

“Can’t say much yet, but we’re making solid progress and yes, it’s going to all feel quite natural in 2024 for the new native 2024 Spit. Ground and flight physics are all new, with a deeper and highly accurate simulation. Reactions to actions will feel intuitive due to more complete laws of physics simulations, giving the responses you’d expect under all sorts of conditions.”

“Much more advanced and realistic for Spit 2.0 as we took advantage of everything 2024 has to offer plus spend a lot of time really trying to nail every aspect of ground physics and flight modelling using many references. Probably invested about 3 months so far in the physics alone.”

“we will have both the broad and round rudder options..and not just for show…both ground physics and flight model take them into account as well. We’re aiming for an accurate representation and experience for both rudders.”

It will again be tested by real world Spitfire pilots:

“Of course we will be testing again with the fine gentlemen at BBMF/RAF when we’re ready for it.”

Spring is here!

After a cold grey overcast winter here in Ireland, spring has finally sprung! Being able to bask in the sunlight the last few days has inspired me to put paw to keyboard and provide a much overdue update. It’s not that the weather stopped activity of our intrepid builders though, there is plenty to share..

Pivka Museum Spitfire moves to UK!

The Pivka Museum Spitfire in Slovenia, so beautifully built by AFormX, has been bought by a buyer in the UK. This was made possible through some big new developments at Pivka. The AFormX team did a zero-time refurbishment of the simulator before shipping it to its new home in Yorkshire. Dave, the proud new owner, has started configuring a new computer to just DCS at this stage and when that is ready will do the binding of the controls and switches to the sim software.

Dave kindly agreed to share some photos of the simulator arriving in the UK with us.

New licences

Just December saw the addition of six new licensees to our community of builders, bringing the total licenses issued to 72! Welcome everyone!

East Kirby Lancaster build

In between building a HFS Spitfire Simulator, one of our licensees based in the Netherlands has the good fortune to be able to assist with the rebuilding of a Lancaster bomber in East Kirby. Cees kindly shared a few photos of the tail section of the build coming along. I understand that there is also a DH98 Mosquito and a B25 bomber at the same facility. Very envious!

Down under

News from Melbourne is that the build by Doug, (who is also building a full size flying Spitfire by the way, seen in the background of the photos :-)) is in final stages of setup. Doug has previously shared photos of his superb build, here he shows the frame installation for some serious wind generating capacity!

MSFS2024

The Microsoft Flight Simulator 2024 released to great fanfare late last year. While it shows great promise, it was soon evident that much work remains to make it acceptably functional. Developers, such as our own FlyingIron Simulations, were left entirely in the dark as the software development requirements. I believe the SDK was only issued by Asobo in February and the team at FlyingIron Simulations is hard at work to produce a totally new update of the Spitfire MkIX. Alex recently posted on Discord:

Hey guys we are aware of the issues; despite what Asobo may have said 2020 aircraft are NOT  truly compatible with 2024. We didn’t actually have a say in our 2020 aircraft fleet being automatically brought into 24.

We will be bringing them into MSFS2024 one module at a time, starting with the Spitfire. There is alot of work to be done converting the aircraft to 2024, and we expect each update to take several months.

You are of course welcome to enjoy the aircraft in 2024 as they are but just be aware that they won’t be functioning as intended.

The good news is that the Spitfire will be receiving a massive upgrade as part of the transition, with an all new exterior model, overhauled systems programming, new variants, liveries,  EFB integration, improved ground handling & so much more!  

Thanks for your patience!

Looking forward to that! In the meantime I am very happily enjoying the HFS simulator in MSFS2020 and of course DCS..

And just love the Passthrough in the VR cockpit!

Update 2.7 of the Builders Guide published!

Happy to announce that the Builders Guide and files have been updated. Changes are as follows:

Revision 2.7 8 October 2024

  1. Provided more detail on renaming requirement of Leo Bodnar cards
    a. Added guideline and files to a new Leo Bodnar directory under the Electronicsfolder.
    b. Updated wording in Control spreadsheet in Electronics directory (HFS Mk.IXSpitfire Control Rev10_6 Dist.xlsx).
    c. Updated wording in section 5.1.5 and 5.1.6
  2. Added more detail to the VR section 5.4.1 and 5.4.2, including Passthrough settings.
  3. Added replacement files to enable passthrough in the FlyingIron Simulations SpitfireMk.IX for MSFS2020/24 in the Electronics/FI Passthrough directory.

Revision 2.6 16 September 2024 (Published in book form only)

  1. Further clarifying detail on setting up SimTools, DCS World and MSFS2020 in section 5.2.3.2
  2. Rewrote VR and Mixed Reality section 5.4
  3. Updated section 5.6 to provide guidance on software startup using the Quest 3 withVirtual Desktop.

Ultimate VR Passthrough

HFS World First: Full cockpit VR Passthrough in MSFS202/2024

In something never done before (that I’ve seen anyway..), you are now able to view your real-world cockpit IN FULL , read maps, write notes etc. while outside the cockpit you see the virtual world. Not only that, you can (if you have created a safe space to do so!) also step out of the cockpit, and walk around the aircraft all the while being able to view the real cockpit interior. The instrument panel is remains virtual, so still no need to have the added complication of real working instruments.

Allow me to elaborate, but if you are in a rush to see what this looks like, by all means check out our video here and feel free to come back and learn more 🙂

I have been playing with the Meta Quest 3 headset using the Passthrough functionality through Virtual Desktop. If it all sounds a little confusing, I don’t blame you but let me explain:

The Quest 3 VR headset has dual cameras that allow you to see the real world in full 3D high resolution colour while virtual windows, games etc. are overlain over this real world. This is the basis of Mixed Reality and Meta have really pulled it off very well with an exceptional headset at a very reasonable price.

The Quest 3 is standalone, i.e. it is fed information via WIFI and you download programs to it and these can then run independently. To get it to run PC games or simulators such as DCS World, MSFS2020 or XPlane you can either use a cable or better yet (to maintain independence from any wiring which must be the way to go), use a programme called Virtual Desktop. You load the streamer portion of that programme on your PC and the main programme runs on your Quest. It uses WIFI to connect and to get the right bandwidth you need at least a router with 5Gbps capability. Your PC must be connected to the router with an ethernet cable.

Virtual Desktop (VD)(thankfully not a disease!) provides the facility to set up passthrough. You elect an unusual colour which VD then interprets as having to replace it with the real world footage. In my case I elected mono-coloured in RGB 255,0,255 which gives a strong pink colour. VD provides the passthrough but unfortunately and seemingly unavoidably there is still a small outline of the area that remains in pink. Anyway, it’s not too intrusive but perhaps that will also be resolved going into the future.

So using a program such as OpenKneeboard or MR Passthrough, you can have a little window into the real world. I thought however, if one can colour the cockpit interior in pink then you can select what you wish to have a passthrough. This was my own first attempt:

The problem with this was that there are still too many shadows, thus preventing the passthrough to work properly. It did prove the theory though, so I turned to Alex Kassabian at FlyingIron Simulations for his help. He did a colour application in the base files of the model, and the result of that you can see in the video.

I still need to play around with the settings to reduce some of the pink remnants and optimise the experience overall, but Build License holders are free to contact me for the base files with instructions on how to use them should they wish to try it out.

Next level immersion

We published a video yesterday to demonstrate how technology is reshaping flight simulation.

Our own philosophy has been to couple an accurately modelled simulator cockpit with full working controls to the virtual world. Treating the simulator essentially as a large joystick allows the VR technology to develop separately, ensuring the cockpit will remain as relevant many years into the future as it is today.

In order to enhance immersion and the feeling of actually being there we have added force feedback, vibration and g-Force simulation to our design in simple, (relatively easily achieved by the homebuilder) modules. The one element that remained elusive at reasonable cost was being able to see your own body and hands in the cockpit while still being in the virtual world.

Limited passthough, being able to see a part of your real world integrated into the virtual world, offers that opportunity.

While the likes of Varjo have with their XR3 and now XR4 headsets offered passthrough for a while, this came at a huge cost ($4000+). Add to this some serious graphics processing power to be able to run the software at acceptable rates to enjoy the enhanced resolution available in these units and you are talking serious money.

Enter the Quest 3. Much lighter and more compact than the Varjo, you need no more than the 128Gb model selling for under $500. Add a proper headstrap with battery and in case you have not got one, a high speed router to handle the wireless PCVR setup. Coupled with Virtual Desktop to run the PCVR and a free passthrough utility from SpitIce (Thank you! Would happily pay for that!) we now have a very good passthrough experience available to us lesser mortals!

Check out our video here of it in action:

Pretty pleased with the result.. 🙂

Graphics quality is great. You can see yourself and your surroundings in 3D. Bear in mind the video much degrades the visual quality, cuts the field of view severely, is only from one eye’s view and no longer in 3D, so can only offer a small glimpse of the actual experience.

Lack of physical presence was perhaps the one element that still made some prefer a physical cockpit with dome projection. The disadvantage of that is that generally the visuals are a little washed out and in flat 2D. Its perfect for procedural training in an aircraft with limited outside visibility (front and side windows) and where the focus is on the cockpit environment, not external visuals. The requirement normally revolves around flying on instruments anyway, therefore seeing the outside becomes somewhat irrelevant and in fact undesirable.

In contrast our focus is on experiencing flight in historical fighter planes, where the visual senses are extremely important in creating a convincing and fully immersive environment. With passthrough, still in early stages of development but available now, a new level of immersion has arrived.

Diamond Jubilee License and the Malta Spitfire!

Spitfire in Malta colours over Valetta in MSFS2020

It was a fantastic occasion to be able to issue our Diamond Jubilee Spitfire Build License No.60 in February.

What is even more exciting is that it has gone to Malta, with it’s incredibly rich historic association with the Spitfire and its heroic defiance against the Axis onslaught.

Spitfire Mk.IX in Malta Aviation Museum

The small island of Malta, a crucial stronghold in the Mediterranean during the Second World War, found an unlikely hero in the sleek and graceful form of the Supermarine Spitfire. As the Axis powers endeavoured to dominate the skies, the Spitfire emerged as a symbol of resilience and an instrument of salvation for the beleaguered Maltese people.

Resupply of Spitfires for Malta from aircraft carriers was fraught with danger

From the moment its Merlin engines roared into life, the Spitfire was not just a mere fighter aircraft; it was a beacon of hope. The exemplary performance of these fighters during the Siege of Malta between 1940 and 1943 is a saga of heroism and tenacity.

The pilots of these magnificent machines formed an unbreakable bond with the island nation. They were not just defenders; they were the heart and soul of the resistance. Every engagement served as testament to their unwavering commitment to protect Malta’s freedom against overwhelming odds.

This image has an empty alt attribute; its file name is HM_Spitfire02-31Fighter-Group-at-Gozo-1-1024x502.jpg
American 31 Fighter Group Spitfire at Gozo, Malta

Against a relentless barrage from the enemy, the Spitfire’s and their brave pilots managed to turn the tide. They displayed a steely determination that mirrored the steadfast spirit of the Maltese people, ensuring they never stood alone.

SAAF Spit over Malta

Today, the legacy of the Spitfire and its pilots is etched into the very fabric of Malta’s history. It is remembered as a shining example of courage and a herald of peace, a heroic chapter that showcases the indefatigable spirit of a nation under siege. Every rivet, every wing, and every propeller of the Spitfires that soared above the Mediterranean blue tells a story — a story of valor, determination, and a relentless will to survive.

Welcome to the Builders Group Malta!

Design Update 2.5 – Full Force MSFS2020..!

Hi folks!

This week we released our latest design update for the HFS Mk.IX Simulator Cockpit to our Build License Holders. This update brings full Force Feedback, Wind Generation and G-Force to the MSFS2020 implementation. Almost all the controls are simulated in MSFS2020 too (as far as the simulation engine allows) through the Spad.Next programme.

Details for Rev.2-5 are as follows:

1.     Added Microsoft Flight Simulator 2020 operability through SPAD.Next software

a.     Updated “HFS MK.IX Spitfire Control Rev10_5 Dist.xlsx” file in Electronics folder.

b.     Included SPAD.Next profile in Electronics folder. (HFS FlyingIron Spitfire MkIX.xml)

c.     Updated section 5.1.6 accordingly.

d.     Added section 5.1.3.2 Microsoft Flight Simulator

e.     Updated section 5.1.3.3 X-Plane

2.     Consolidated G-Force Seat and Force Feedback functionality through SimTools v.2.6 This means it is no longer necessary to run DCS Bios to achieve the Force Feedback for Ailerons and Rudders.

a.     Updated “HFS MK.IX Spitfire Control Rev10_5 Dist.xlsx” file in Electronics folder.

b.     Included new configuration files in Electronics/HFS FullForce folder

c.     Deleted Electronics/G-Force Seat and HFS_BD_Rev9c_AS_WS folders

d.     Updated description in section 5.1.1 Introduction

e.     Updated section 5.2.2.1 Connecting the fan to the Arduino

f.      Renamed section 5.2.3 to Force Feedback and G-Force Software Setup and major rewrite to use SimTools.

g.     Added section 5.6 Running the Software

3.     Pneumatic Assembly Base for G-Force seat missing files included:

a.     Added two missing STL files for the Pneumatic Assembly base in the STL Files/G-Force Seat folder:

                                      i.     04.04.01.01.01 Base.stl

                                    ii.     04.04.01.01.02 Base.stl

b.     Updated section 4.10.5.6 to include the missing two base files in the listing.

c.     Updated section 3.12 to include full listing of supplied STL files for self 3D printing.

4.     Cleared up inconsistency and clarified naming convention of the Seat Airshims used in the G-Force Seat:

a.     Added description and sketch showing the naming convention of the shims in section 4.10.5.4

b.     Added Pneumatic Tubing Layout diagram to section 4.10.5.8.2

c.     Corrected nomenclature on wiring diagram section 4.12.3.2

5.     Updated section 3.13.1 Bubble Hood Plexi to reflect the supplier details for individual Malcolm Hoods in the UK and Australia.

6.     Updated section 5.1.5 Calibration of the Axes to:

a.     reflect use of DIView as a better alternative to the Windows Joystick utility. 

b.     Also included a download link and added the DIView.exe to the Electronics folder for convenience.

Enjoy and a Merry Christmas to all!

Flying Legends 2023 – Church Fenton

Twelve Spitfires on the flight line

I was privileged to be able to attend the Flying Legends Airshow this last weekend. It was the first time it was held at its new venue at Church Fenton near Leeds. The location lent itself to setting up a beautiful flight line, including 12 Spitfires of various types and 3 Hurricanes.

It was great to meet up with Steve and Terry of Simply Spitfire again. I look forward to seeing their Mk.II soon!

Despite challenging weather the rain stopped and clouds parted at critical moments of the Saturday afternoon display. This included a superb display by 8 Spitfires.

Here for your viewing pleasure and builders inspiration, a few of the pics I managed to take: