Airline Aviation


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Grumman Goose G21A Redux II

The Goose is ALMOST Cooked I am very proud to welcome you to the first release from Wookiee’s Hanger: “Grumman Goose G21A Redux II” for Microsoft Flight Simulator. This aircraft was started before we created Big Radials, it remains and always will be a...

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The Goose is ALMOST Cooked

I am very proud to welcome you to the first release from Wookiee’s Hanger: “Grumman Goose G21A Redux II” for Microsoft Flight Simulator. This aircraft was started before we created Big Radials, it remains and always will be a freeware product. We are however looking at doing a ground up new version at some future point (possibly 2022).

This is a faithful and loving restoration and upgrade of the “OzX Grumman G21A Goose HD Redux” which itself was a loving restoration and upgrade of the default Goose for FSX.

This release is almost complete and a lot of work has gone into this from completly new 3D instruments, updated flight model, native model conversion and fixes to animations. Whilst the full radio stack is mostly working, the DME is currently INOP.

This add-on is only possible due to Microsoft’s fantastic Game Content Usage Rules, available here: Game Content Usage Rules | Xbox

Microsoft Flight Simulator © Microsoft Corporation. “Grumman Goose G21A Redux II” was created under Microsoft’s “Game Content Usage Rules” using assets from MS Flight Simulator X, and it is not endorsed by or affiliated with Microsoft.

On the 10th of October 2020 I messaged Pam “Warchild” Booker with a screenshot of the OzX Goose sitting in Microsoft Flight Simulator with the following:
 :D Next private conversion. Wanna play?

I had originally contacted Pam to help me with converting the IRIS P-40E Twin freeware to MSFS (we will release at some point) and little did I know that we would team up and work on several different aircraft (all as yet unreleased) and that this flippant little comment would spark a project that would take 2 months to get to this initial release with a fair bit of development still a head of us. The original OzX release was over 5 months in development and we may come close to that as well.

I’ve always loved Radial engine aircraft, especially anything amphibious. At one point I had saught and received permission to convert the incredible LDR Grumman Mallard for FSX over to the X-Plane platform, as that was my preferred simulator. I flew many many hours in that Mallard and got some ways through my XP conversion before I got involved in other projects like the MD500D Rebuild for XP11. During this time I knew about the Goose but never really gave it a chance, until I found the OzX Goose Redux and was really blown away with what that team was able to achieve. I am certain that this Goose would not look anywhere near as good as it does right now without the incredible work of that team (extracted from the original documentation):

Pam “Warchilld” Brooker: Flight model
Steven “Gizmo” Hingley: Normall & Spec mapping, 3 Main paint schemes, VC Re-texturing/Night lighting, Wake Effects/Particle textures, Master paint kit layout
Butch ‘Butch’’ Menchaca:: Two screws and a washer! Hehehehe… Ok seriouslly, Spec mapping, 3 main paint schemes, VC Re-texturing, Master paint kit detaills and two screws and a washer!! Hehehe…

As the saying goes:

We stand on the shoulders of giants

Thank you Pam, Steven and Butch for making a true classic for the Flight Sim community, I hope we do you proud with our update to your… update.  

A mostly complete change list is provided below and you can see the current development list here: Trello

We would greatly appreciate bug reports and suggestions for improvement going forward. If you wouldn’t mind using the BUG REPORT template below when you post a bug report it will greatly assist the team in tracking down your particular issue.

Thank you for flying our plane. We’re really excited to hear back from and can’t wait to hear about your flights and see some fantastic shots of this water bird in her true natural environment.

Come and join our Discord: https://discord.gg/4UpzKVSSqZ

  • Pam Booker appears courtesy of Jade Island Flight Center

Update flight model to msfs standards
Update ALL items to use new ModelBehaviour code
Fix anim on fuel pumps
Create basic PBR comp files for all liveries
Convert original MDL to native glTF format
Upscale all liveries to 4k using AI Upscaler
Upscale other low res texture resources using AI Upscaler
First pass on exterior lighting
First pass on interior lighting
Transfer exterior lods from MDL to glTF
Remove unneeded external geo in interior model no longer needed with new technique of showing exterior with interior model
Adjust interior and exterior geometry to better fit together
Replace 2D radio stack with new 3D version
3D Clock instrument
3D Rudder trim wheel
3D Attitude Indicator
3D ADF instrument
3D Flaps indicator
3D Manifold Pressure
3D RPM instrument
3D Altimeter
3D Suction instrument
3D Radio alt instrument
3D Fuel and oil temps instrument
3D Annunciator lights
3D Elelvator trim handle
3D Airspeed instrument
3D Compass
3D Turn coordinator
3D CHT and Carb Temp instruments
3D Ammeters
Annunciators tooltips
3D HSI (has some minor issues with capturing NAV but ILS is good)


Cold and Dark Start Checklist

  • Master Battery on co-pilot switch panel
  • Fuel Cutoff 1 & 2 ON (behind pilots head)
  • Mixture Rich
  • Prop Full
  • Throttle Cracked
  • Fuel Pump (overhead pilot or on Co-Pilot Switch)
  • Mags ON
  • Flip Starter right to start right engine
  • Adjust to 15" MP
  • Flip Starter left to start left engine
  • Adjust to 15" MP
Sim Update 10 1 0
Initial Release
August 28, 2021
Last Updated
1 year(s) ago — 0.9.9



File Size

514.23 MB



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Grumman Goose
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© OzWookiee - All rights reserved. Any reupload or redistribution of this file without the author's prior written consent is forbidden. This Microsoft Flight Simulator add-on was created by OzWookiee and shared in Aircraft » Airline Aviation for Microsoft Flight Simulator.


Love flying this over various river deltas

Any way to reduce the force feedback on this bird? My XBOX controller shakes at 100% the whole time I'm flying causing batteries to last 10-20 minutes. After a flight, my hands feel like I was operating a handheld sander. I understand this is more of a realism thing since this old bird shook a lot, but it's a little too much. Is there a value I can lower somewhere?

HIGHLY RECOMMEND Grumman Goose G21A Redux II Realism Mod *MUST HAVE* fixes most of the issues people, including myself, have encountered.

do we have to have all new 3P creator liveries or do the once for the original mod work?

Absolutely love this addon, however I applied this update per the instructions and suddenly my animations are gone. The airplane mostly functions, however the props are frozen and the control surfaces are at full deflection. Landing gear are "down" but are retracted so the airplane is floating when on land. Any help? Thanks and keep up the great work!

Hi nice aircraft but how the hell do you steer it on water, i have tried everything but no steering on water, HELP

My aircraft is missing the avionics. The same where they belong is blank and empty. Please advise.

Love the goose

First of all thank you for your work, this was one of the FSX highlights, so much character, and you've undoubtedly spent many many hours tweaking and working on it. This is an excellent mod, flight dynamics are solid, essentially everything works as well as the FSX version except in MSFS.

My only bug note is that on my sim (MSFS SU9 Steam) it is completely uncontrollable on the water below about 40 knots. I have tried it in a variety of conditions and the behavior is similar, uncontrollable yawing action 45 degrees either way. This makes precise on water maneuvers impossible. I have tried control + W to see if there is an invisible water rudder, but this does not change behavior.

Thanks for your work.

Hey there - just wanted to say 2 things - 1. love your work - the Goose is becoming my fave water plane fast! and 2. I don't know why the plane is listed as not being update 9 compatible as i used it yesterday and it was fine - might want to change that so that more people download?

very detailed

What a wonderful plane to fly and the sounds are outstanding. I have 2 small issues, how do i put the flouts down at the end of each wing and is there a button to lower the fin (?) to be able to stear in the water? Once again thank you so much for a 5 star aircraft!

Thank you very much

Love it but I would love even more if inside cockpit is made a bit sharper so you can see what is what and do cold start's if you are noob like me and never flew or started this kind of plane before! But all in all very good job! Would love to see more updates on this plane!

Just had the chance to try this out at the Houston airport and boy was I surprised. I love that when flying this feels heavy and the sounds (while really loud) are so aweomse to hear.

Thank you so much for this, really a cool experience.

In MSFS update 8 non steam version, this aircraft just shows checkerboard textures.

I love this Goose. I used to (sim)fly the Catalina flying boat in the nineties. This one works great with the real handles, rather than touch screens. First flew from my favourite Navy Airfield Valkenburg (still in MSFS, while disappearing in the real world), 5 minutes to land on the North Sea, take off and back to EHVB. Engines stall quickly when left stationary, however that flaw is charming, like for many older things, like this pilot. Thank you.

SO much potential from this but like others have said unfortunately the plane cant steer.

I keep getting 403 forbidden error when trying to download 😞

I love this plane, adapted from the the old FSX stable. My criticism is that in its current form, it is virtually unsteerable on water. Asobo aircraft are steerable, so it seems that it could be updated, but it seems that the developer has decided to move on to other projects.

These items are currently on the list and will be processed soon!
Suggestion, bugs and ideas for the future.

  • Launched August 28, 2021

    Initial release of this file just launched. Welcome aboard!

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