UPDATED: Savage Carbon - STOL Realism Mod (v1.0.6 / Nov 28)


A lighter, faster and stronger Savage Cub with a 141HP Rotax 915iS powerplant.

The Savage Carbon is a custom backcountry aircraft built to be a versatile high performance stick and rudder bush machine. She excels at STOL yet flies with XCubs.

She’s a load of fun. She’s also awfully close to a study level aircraft.


The Savage Carbon will install as a new plane, appearing next to the Savage Cub. 13 Liveries are included.

1. Download the Savage Carbon (v1.0.6 / Nov 28)


Option 2: DOWNLOAD from MEGA

2. Drag into the Community Folder

  1. Delete older versions of the mod
  2. Extract the ZIP file
  3. Drag the folder named gotgravel-savage-carbon directly into the Community folder
  4. Restart the sim

If done correctly, your folder structure should look like this:




An Awesome Experience

Bush machines are extreme machines, often pushed to the edge of their performance envelopes. To give you the most authentic STOL experience possible, we knew from the start that the flight model had to be pushed to extremes as well.

To this end it took well over 150 hours of research, engineering and test flights to tune all aspects of the model to satisfaction, always supported by actual Zlin Aviation POH data and Rotax engine specifications. Performance is frequently evaluated by 2 seasoned pilots with experience in similar planes.

Some of the highlights:

  • Flight model parameters like parasite drag, induced drag, flap drag and lift, moment of inertia along all axis, P-factor, propwash, torque, weather vaning, gyroscopic precession and more have been finely tuned.
  • The CG has been reworked by correctly positioning all simulated masses in 3D space, resulting into a stable aircraft and a natural feeling flight experience.
  • Ground handling is what you would expect from a purpose-built backcountry aircraft: Lift your tail, propwash left and right, brake on a dime.
  • Vortex Generators on wing and tail are accurately simulated, delaying stalls and enabling those slow STOL approaches.
  • Aerodynamic pressure on control surfaces at high speeds is correctly represented giving you full control of the aircraft at all velocities.
  • Two auxiliary fuels tanks of 10gal each were installed giving you that extra range when you need it.
  • Night VFR. It’s got all the illumination and navigation lights you’ll need.
  • Parking brakes were added (use a keybind to control).

More STOL stuff:

  • A 3rd monster flap setting has been added (60 degrees!) so you can fly slower approaches, with higher sink rates, giving you 15ft landing bragging rights.
  • The mains were moved forward a bit so you can (almost) safely prime the brakes before touch down.
  • Flaps move faster so you can pump them for short take offs and retract them at touchdown for maximum braking power.

A Strong and Light Airframe

The Savage Carbon’s airframe is constructed of a tough carbon fiber skeleton, making her about 10% lighter than a Savage Cub while enabling her to sustain higher g-forces.

A Powerful Engine

Powered by the latest turbo charged and injected Rotax 915iS, this reliable 141HP workhorse is responsible for giving the Savage Carbon an unmatched power to weight ratio.

All 3 engine gauges - oil temperature, oil pressure and CHT temperature - are accurately simulated as well providing an immersive flight experience.

So yes, you do need to warm up your engine for 2 minutes or so, and the choke is needed on a cold day.

A Large Prop

A larger 2 meter carbon fiber fixed pitch propeller was installed converting all that power into plenty of thrust.

14 Liveries

Comes with 14 custom designed liveries including 2 popular historic D-Day designs (USAF and RAF). All liveries come with red lambskin seats.



This Savage Cub to Savage Carbon conversion mod is free and always will be, but if you enjoy it and feel you want to contribute towards this project it will always be appreciated.

PayPal_Logo_Icon paypal.me/gotgravel



Changelog v1.0.6 (Nov 28, 2020):

  • Autopilot. All setup and configured, but it is disabled by default as it does not come with the Savage. If you want it, please enable it by following the instructions in the next section.
  • New livery “Rust Bucket”, bringing the total to 14
  • Night VFR! With a flick of the strobe switch you now have illuminated gauges, navigation lights and double strobes. The landing light is also brighter.
  • Electrical system upgrade
  • Multiplayer sunken planes fixed
  • Propeller upgraded from wood to carbon, adding 3% power
  • Flight model realism improvements
  • Correct white arc added to the cockpit ASI (but the original white arc is still on the glass as it comes with the gauge itself, this is currently beyond my control)

Changelog v1.0.5 (Nov 19, 2020):

  • 3rd monster flap added (60deg!) to enable steeper high-sink rate approaches…and even slower ones
  • Faster flap change speed of half a second…commonly seen in STOL work
  • Auxiliary fuel tanks installed in the back seat
  • Prop shutdown a little slower to sync with shutdown sound exactly
  • Rotating prop 3x more transparent to match real-life looks
  • Increased maximum gross weight from 1111lbs to 1150lbs
  • Much easier to trim elevator
  • Faster roll at lower speeds
  • More tips added to the loading screen

Changelog v1.0.4 (Nov 13, 2020):

  • Added 2 more liveries (D-Day USAF and D-Day RAF), bringing the total to 13.
  • New and improved Rotax 915iS with much more accurate power curves
  • Further refined engine gauges (Oil temp, Oil press, CHT temp)
  • Simulated aerodynamic back pressure on control surfaces at higher velocities
  • Dramatically improved STOL realism and control
  • Excellent ground handling, can throw your tail left and right with just propwash
  • Fixed: much reduced nose-up attitude upon flap deployment
  • Much more realistic flight model overall

Changelog v1.0.3 (Nov 6, 2020):

  • Added 5 more liveries (purple, teal, black, batman and zebra), bringing the total to 11
  • More realistic oil temperature and pressure gauge simulation
  • Much improved ground handling
  • Much improved CG (even harder to nose-dip now…unless you don’t apply stick back pressure)
  • More powerful pneumatic brakes
  • Ground effect (added)
  • Gyroscopic precession effect (stronger effect)
  • P-Factor (stronger effect)
  • Torque (stronger effect)
  • Weather Vaning (added)
  • Adverse Yaw (added…but FS2020 does not do this very well yet)
  • Propwash (stronger effect)

Changelog v1.0.2 (Nov 1, 2020):

  • Added 5 new liveries to the default white: red, orange, yellow, green and blue
  • Added handbrake
  • Adjusted brakes (it’s now harder to nose-dip)
  • Increased fuel capacity by 50%
  • Improved flight model
  • ICAO Type Designator set to SVCB (seen in multiplayer labels)

Changelog v1.0.1 (Oct 28, 2020):

  • Initial release


The autopilot is disabled by default as it is not installed in the Savage. If you want its functionality you will need to manually enable it as per the instructions below. Use your own keybinds to manage the autopilot on / off state, altitude hold and heading hold.

  1. Go to your community folder
  2. Go to gotgravel-savage-carbon / SimObjects / Airplanes / Asobo_Savage_Carbon
  3. Open the file engines.cfg in a text editor
  4. Go to the last line and change the 1 to 0 (DisableAutopilotControls = 0)


  • Most of this information is also found on a placard on the left side inside the cockpit
  • All performance data was obtained at sea level under ISA (clear skies) and MTOW (Maximum Take Off Weight) conditions

Power Settings

  • 75% POWER 5500 RPM
  • 70% POWER 5000 RPM


  • CRUISE SPEED (VC) 115kts
  • BEST CLIMB RATE (VY) 65kts

Fuel Flow

  • 4500 RPM 5.2gph
  • 4800 RPM 6.7gph
  • 5000 RPM 7.2gph
  • 5500 RPM 9.8gph
  • 5800 RPM 11.5gph




Sensitivity settings are personal and very much depend on your controller and preferences, but if you don’t know where to start…this is a good one!
(X is Aileron, Y is Elevator, Z is Rudder, Slider X is Throttle)








I don’t know if it’s realistic, but i love it. Nice low speed landings and enough power to be fast high in the sky. :wink:


I have been flying this homesick angel for about an hour now. It has become my go to for Bush flying. Thanks, awesome aerie!!


Thanks guys! Very glad you’re all enjoying this bush machine :sunglasses:

Just a heads-up, gonna be working on the brakes a little in a couple of hours, so expect update 1.0.2 today. There have been a couple of reports that it is too easy to get a nose-over on some approaches, so will be fixing that. Perhaps move the mains forward a few more inches or reduce brake power just a little. Maybe a bit of both.
Secondly I will consider installing handbrakes. Did not come with the original Savage but that does not stop me from upgrading the Carbon :wink:

A selection of liveries are also in the pipeline, but that will be later this week most likely. In any case, development is ongoing and I’m hearing all your feedback.


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Freakin LOVE it!!! If there is a way you could do this kind of mod with the shock ultra it would be awesome!!! I see on their website you can run the 915is in the shock ultra , im curious to see the performance with that! Until then , the carbon is my new go to for bush flying! Many thanks for your hard work!!


How realistic is this fictional mod? Good question!

I would say very. The engine is a highly accurate simulation of the Rotax 915iS. For starters. The plane’s weight has only be reduced by 10% (empty weight from 650 to 585lbs, or 265kg). Not unrealistic given that carbon fiber is about 45% lighter than regular aluminum. The CG calculations are much more accurate than the default Savage Cub too, and so are many other parameters.

Move the mains forward so you can brake harder? Entirely what is done in the real STOL world too. Have done my homework here :wink:


Upgrade the Shock Ultra with the 915? Would love to seriously. However all premium aircraft are locked when it comes to modding, so can’t touch that (for now…here is hoping the modding community will gain access to fixing premium planes in the future).

You sound like a virtual Mike Patey. Look at the performance of the Wilga mods he has done. Power to weight ratio is a marvellous thing.:+1:


Can only take that as a compliment. But got to admit, watched most of his videos. Totally amazing what he does. Now following all his work on his Scrappy bush plane…looks like it’s getting closer and closer to first flight :slight_smile:

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13 litre engine for Scrappy. You can never have too much power.:muscle:

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You can trust mike to max thrust. No small engines for his planes!

In the mean time…handbrakes have been installed in the Savage Carbon! Coming in the next update :wink:

Great. No glass panels or nav equipment. Much VFR fun to be had.!


Cool. Fun stuff. You community modders are making the sim interesting.

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Thanks for this mod, nothing like a little more power. Notice the nav and strobe lights aren’t appearing from some angles. Wasn’t quick enough to catch the stobe lights but they seem to use the same logic as the associated nav light.

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Yeah there’s a bit of a bug with the newly installed nav and strobe lights directions, have yet to dive into that. They weirdly enough seem to follow a fixed heading … not relative to the plane but to the world.

Test-flights with a friend:

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Superb !! Thank you !

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Nice shots! Love it :slight_smile:

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Update 1.0.2 is out…and with 5 electrifying liveries!

DOWNLOAD (V1.0.2 / NOV 1)

Changelog v1.0.2:

  • Added 5 new liveries to the default white: red, orange, yellow, green and blue
  • Added handbrake
  • Adjusted brakes (it’s now harder to nose-dip)
  • Increased fuel capacity by 50%
  • Improved flight model

Here’s a little trivia for you on the liveries:

  1. The original white is using a gun-metal color palette
  2. The red is none other than Ferrari red
  3. The orange is Dutch orange
  4. The yellow, green and blue are all Lamborghini colors

Oranje, blanje blaauw. :+1:

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