Published: · Reviewed by: FSDC Aerosolutions Engineering · Reading time: ~9 minutes
Full-Motion vs Fixed-Base Flight Simulators: Which One Does a Training Center Need?
Quick answer. Choose fixed-base when the syllabus is mostly procedural — checklists, instrument scan, IFR, navigation, normal & abnormal procedures, basic emergencies. Choose full-motion when the syllabus depends on motion cues — upset recovery, unusual-attitude training, autorotation entry, type-rating fidelity, and qualification levels that require motion. Many training centres run both, with fixed-base devices for high-volume procedural training and a smaller number of full-motion devices for advanced and motion-dependent training.
What the two devices actually are
Both full-motion and fixed-base simulators share the same core: a cockpit replica with operating instruments and controls, control loading, a visual system and an Instructor Operating Station. The difference is one specific subsystem.
Full-motion simulator
The cockpit shell sits on a 6-DOF motion platform that can pitch, roll, yaw, heave, sway and surge. The platform delivers acceleration, attitude and vibration cues that are calculated from the flight model and synchronised with the visual scene. Modern FSDC platforms are electric (servo-driven), which is quieter, more efficient and easier to maintain than legacy hydraulic platforms.
Fixed-base simulator
Same cockpit, same control loading, same visuals — but the cockpit is stationary. The pilot still feels real control forces through the control loading system, sees the same outside world through the visual system and operates the same IOS-driven scenarios. They just don't feel acceleration and attitude cues physically.
Where motion actually helps training
Motion adds the most value
- Upset prevention and recovery training (UPRT). Recognising and recovering from unusual attitudes depends partly on what the body feels. Motion cues let pilots train the recognition cues that are otherwise hard to teach.
- Autorotation entry in helicopters. The vertical heave and yaw onset when an engine fails in the hover or in forward flight are part of what helicopter pilots react to. Motion makes those cues real.
- Settling-with-power / vortex ring state. The onset is partly somatic. Motion helps pilots recognise it earlier.
- Stall and approach-to-stall. Buffet onset, sink, attitude changes — motion contributes to the visceral recognition.
- Turbulence and crosswind landings. Realistic gust response feels much more like the aircraft on motion.
- Type-rating fidelity. Where the regulator requires motion as part of the qualification basis (e.g. FFS Level B and above), there's no fixed-base alternative.
Motion adds little
- Cockpit familiarisation. Switches, panel layout, checklist flow — static.
- Instrument scan training. The eyes and brain pattern, not the body.
- IFR procedures. Holding patterns, approaches, missed approach — flown on instruments.
- Cross-country navigation. Plotting, flight planning, en-route management.
- Most CRM / multi-crew procedures. Communication, briefing, decision-making.
- Many emergency procedures. Checklist execution, system isolation, decision-making.
Decision matrix
| Training need | Fixed-base | Full-motion |
|---|---|---|
| Ab-initio procedural training | ✓ Recommended | Overkill for most schools |
| Instrument / IFR training | ✓ Excellent | Acceptable but not necessary |
| Circuit / pattern training | ✓ Good | Marginal benefit |
| Emergency procedures (checklist) | ✓ Good | Marginal benefit |
| Upset prevention & recovery | Acceptable | ✓ Strongly preferred |
| Autorotation (helicopter) | Acceptable for procedure | ✓ Preferred for handling |
| Settling-with-power | Acceptable for procedure | ✓ Preferred for handling |
| Turbulence / crosswind | Limited | ✓ Strongly preferred |
| Type-rating to FFS Level B+ | Not eligible | ✓ Required |
| Mission rehearsal | ✓ Good | ✓ Better — visceral cues |
Cost of ownership
Full-motion simulators cost more in three areas:
- Capex. The motion platform itself, plus the structural foundation, larger room and reinforced flooring.
- Operating costs. Higher electricity demand under motion and additional maintenance for the platform, encoders and safety systems.
- Facility. Motion devices need ceiling height, structural loading and access for the platform travel envelope.
FSDC's electric platforms substantially reduce points (2) and (3) compared with legacy hydraulic platforms, but a fixed-base device is still simpler, smaller and cheaper to run.
Qualification considerations
Regulator frameworks (EASA, FAA and others) define qualification levels for training devices. Lower levels — FNPT, FTD — can deliver substantial training credit without motion. Higher levels — FFS Level B, C, D — require motion as part of the qualification basis.
FSDC does not assert specific regulator qualification for its devices on this page — qualification depends on the customer's facility, qualification programme, operator and the regulator they're working with. Each programme is scoped against a specific qualification target. See the flight simulator certification levels guide for an overview of the EASA / FAA framework.
Typical training-centre fleet shapes
Primary & basic training academy
Two or three fixed-base devices on the primary type, plus optionally one full-motion or mixed-reality device for advanced phases. High pilot throughput, mostly procedural.
Multi-engine / IFR school
Fixed-base FNPT-class devices for IFR procedures and instrument training. Full-motion is optional and depends on qualification credit being sought.
Type-rating organisation
One or more full-motion devices per type, supplemented by fixed-base devices for procedural revision and instrument refresh.
Defence rotary-wing programme
Full-motion is strongly preferred for handling-intensive scenarios — autorotation, settling-with-power, brownout / whiteout, NVG-style ops. Fixed-base devices supplement for procedural training.
How FSDC scopes the choice with customers
FSDC normally runs three questions early in a customer conversation:
- What does the syllabus actually require? If the high-value training items are motion-dependent, motion belongs in scope.
- What qualification credit are you claiming? If the credit framework requires motion, the answer is forced.
- What facility and budget envelope are you operating in? Motion needs more room, more structural support and more capex; the trade-off has to make sense.
The output is a recommended device mix that delivers the syllabus rather than a one-size-fits-all answer.
Related FSDC capabilities
- Full-Motion Flight Simulators
- Fixed-Wing Simulator service
- Rotary-Wing Simulator service
- AeroSim Pro single-cockpit FMS family
- AeroMix Multi-Crew Mixed-Reality Simulator
- Instructor Operating Station
- Electric vs hydraulic motion platforms
- Flight simulator qualification levels explained
Frequently asked questions
What is the difference between full-motion and fixed-base simulators?
A full-motion simulator places the cockpit on a 6-DOF motion platform that delivers acceleration, attitude and turbulence cues. A fixed-base simulator has the same cockpit, controls and visuals but the cockpit doesn't move. Both can deliver high training value — the right choice depends on the syllabus and qualification target.
Do I need full-motion for ab-initio training?
Usually no. Procedural, instrument and basic-handling training is well served by fixed-base devices. Motion adds the most value for upset recovery, unusual attitudes, autorotation entry and visceral cues.
Is motion required for any qualification level?
Yes — higher-level qualification (e.g. FFS Level B and above under EASA / FAA frameworks) requires motion. Lower-level FTD / FNPT devices generally do not.
Is FSDC's motion platform electric or hydraulic?
Electric — quieter, more efficient and easier to maintain than legacy hydraulic platforms, with continuous 360° yaw capability.
Can FSDC build a custom flight model for either type?
Yes — FSDC develops custom flight models for both full-motion and fixed-base devices, validated by type-rated instructor pilots.