A2A Simulations - Accu-Sim Comanche 250 MSFS

"Well, I can finally show you why we have been so quiet for three years. We’ve been steadily working on an all new way to create airplanes called “Accu-Sim 2.0”. Our long time customers know Accu-Sim well as it’s been powering our airplanes for over a decade. During that time we’ve learned a lot. While this new technology carries the same Accu-Sim name, this latest version was built brand new from a clean slate.

We are so very happy to say, we have succeeded in everything we set out to do. We didn’t cut any corners and this brand new Accu-Sim technology represents everything we dreamed of. Perhaps the biggest dream and challenge was to create a new aerodynamics system that allowed us to model how an airplane flies through the air. It’s the kind of simulation we knew was possible but wasn’t yet realized. Nobody has done anything like this before. This represents a quantum leap for us, and it’s the beginning of a whole new way of developing airplanes for flight simulation.

I decided early on the first airplane we had to simulate with Accu-Sim 2.0 would be the Comanche 250, as this is an airplane I have owned and operated for over 10 years. It feels like a nice pair of shoes that are perfectly broken in yet still look good. During development I was continuously asking questions without acceptable answers, and our Comanche gave us every answer we asked. Owning the airplane offers tremendous advantages as you don’t need to ask permission or explain why you need to perform some odd sounding test. None of our testing was dangerous but much of it involved things nobody, including me had ever done before. There is a reason I have owned and operated a Comanche 250, N6229P for over a decade, and now through Accu-Sim 2.0, you can better understand why."

Scott Gentile
President
A2A Simulations Inc

Features:

• A brand new external aerodynamics engine built with Accu-Sim 2.0 ‘Merlin’ technology
• Remarkable performance accuracy based on operating A2A’s own Comanche 250, N6229P, over many years
• Unparalleled aircraft feel, handling characteristics and trim behaviour based on extensive flight testing
• A complete physics-based per-cylinder simulation of the Lycoming O-540-A internal combustion engine
• Dynamic ground physics featuring true weight on wheels simulation, tyre side-loading and response to different surface types
• Advanced turbulence system and subtle wing flex simulation which responds based on turbulence strength, ground bumps and fuel load
• Sophisticated airframe vibration physics with unique ground roll and engine vibration-based effects
• Authentic fuel system simulates fuel lines, primer, strainers and fuel contamination
• Custom oil system with dynamic viscosity and contaminants that degrade and change the color of the oil
• Advanced engine starter simulation that physically turns the engine through its compression cycle
• Physics-driven sound environment featuring hundreds of dynamic sound effects
• Beautifully-rendered external and internal modelling and texturing with subtle wear effects, dynamic aircraft registration decals and advanced animations.
• Detailed JPI EDM 830 engine monitor with authentic displays and leaning procedures
• Custom-coded Narco avionics stack with NCS812 COM/NAV/DME unit, Mark12E COM/NAV, AT150 transponder, CP 136 audio panel and 841 ADF receiver
• Customisable integration of MSFS default/Working Title GNS 430W and 530W GPS units
• Further integration options for PMS GTN 750 and TDS GTN 750Xi GPS systems
• Century NSD-360A HIS with custom needle-smoothing physics
• Advanced simulation of the S-TEC System 30 two axis autopilot
• Beautiful night lighting implementation featuring multi-purpose dimmable and directable Type C-4A cockpit light, dimmable emissive indicator lamps and white and red lighting options.
• Pilot’s tablet for intuitive interaction with, and management of your airplane
• Interactive walkaround with many moving parts that can be grabbed, manipulated and inspected
• Customisable persistent airplane with failure and wear simulation which can be adjusted and deactivated if desired
• Graphical tablet engine analyser provides a detailed insight into the piston engine operation
• Real time load manager with dynamic weight and balance indicator
• Electrical system analyzer and circuit breaker functionality
• Two naturally animated rear seat passengers and support for native MSFS avatars in the front seats
• Fluid in-sim performance comparable with default aircraft of the same class

• Microsoft Flight Simulator (Version 2020)
• OS: Windows 10 / 11
• Processor: Intel i5-8400 | AMD Ryzen 5 1500X
• Graphics: NVIDIA GTX 970 | AMD Radeon RX 590
• Video Memory: 2 GB VRAM
• Memory: 8 GB RAM
• Free hard disk space: 1 GB

Version 1.5.0:

• Fixed airplane creeping post SU15 when engine is run up with brakes or chocks applied
• Fixed a bug preventing airplane from moving away from parking spot in some locations when outside air temperature is well below freezing
• Improved synchronization between navigation light switching and relay click sound when using panel light rheostat
• Fixed air pressure display error in altimeter Kollsman window when set to use imperial units (inHg)
• Improved battery performance slightly at very cold temperatures allowing for better chance of engine start
• Extended the lifespan of the oil pump and oil lines
• Slightly reduced the effectiveness of the fresh air vents
• Improved the display logic for centre of gravity in tablet
• Added additional telemetry variables for force-feedback hardware
• Omitted WT GNS initialization sequence when aircraft is loaded with avionics power already on
• Added update history for Marketplace

Version 1.4.7:

• Added support for Xbox marketplace platform in sim
• Fixed overstress crash which would occur if view was switched to outside camera following an apron start with cockpit persistence switched off
• Improved engine physics so very high temperature can cause more rapid cylinder wall deterioration
• Improved integrity of cabin against air leaks to allow more efficient heating
• Fixed cabin vent bug which caused vents to not exchange air properly
• Fixed issue which caused vents to pick up too much ambient wind on the ground
• Improved magneto physics so badly worn mags will generally perform worse
• Added new localizations for aircraft description

Version 1.4.3:

• Improved support for loading saved flights
• Fixed repetitive 'tick' in engine sound at around 1,200 RPM
• Added input configurator support for multiple joystick devices with the same name
• Fixed typos in airframe and engine maintenance section descriptions
• Updated hangar aircraft description to match Marketplace release

Version 1.4:

• Updated sound system to use Wwise interface
• Removed HelperA2AserviceMSFS executable and its entry in exe.xml
• Removed master volume slider from tablet as this is now controlled by the MSFS master volume slider
• Restored proper engine preheater functionality
• Slightly improved performance of battery at very low temperature
• Improved handling of custom joystick shortcuts with the new functions added to MSFS SDK in SU13. (The change will take effect after saving config using the updated Input Configurator.)
• Fixed GTN 750Xi not being shown as selected in tablet after restart
• Enlarged environment occlusion to prevent long blades of grass from poking through cockpit floor
• Fixed point and drag interaction when using gamepad
• Fixed symmetry of navigation lights
• Fixed wing loading displayed on tablet when metric units are selected
• Fixed transponder ident light remaining on if lit when avionics power switched off
• Modified beacon lighting to eliminate slight leak onto cabin ceiling
• Removed pitch control out of range log warning
• Updated Hobbs and tachometer counters to show tenths of hours digit as black on white
• Corrected mistyped instance of ‘crankshaft’ in maintenance details of tablet