Certification FrameWork VTOL

VTOL Certification Framework

Mini-Bee / RED VTOL — EASA Certification Framework

Mini-Bee / RED VTOL — Certification Pathway

This page presents the high-level EASA certification framework studied for the Mini-Bee / RED VTOL concept. The objective is to understand how a 2PAX hybrid VTOL multicopter, designed as an ultra-light air ambulance concept, can be positioned inside the European aviation certification environment.

Figure 1. Mini-Bee / RED VTOL certification framework overview.

Main presentation

Download the full PowerPoint presentation

Red VTOL TRL4 — 2PAX VTOL hybrid multicopter — Ultra light air ambulance — EASA Certification Framework

File:20260422 RedVTOL EASA Certification 01 High Level Framework v2 en.pptx

This presentation was prepared in the context of the Mini-Bee / RED VTOL work, with contributions from RED VTOL, TechnoPlane as coordinator of the Mini-Bee project, and ALTEN Sud-Ouest through the ALTEN Solidaire initiative.

Project context

Item	Description
Project	Mini-Bee / RED VTOL
Aircraft concept	2PAX hybrid VTOL multicopter
Mission orientation	Ultra-light air ambulance / VEMS concept
Main certification authority	EASA — European Union Aviation Safety Agency
Main aircraft basis	CS-27 Small Rotorcraft
VTOL-specific basis	SC-VTOL-02 Small-Category VTOL-Capable Aircraft
Project logic	Build a credible path from innovative VTOL concept to certifiable aircraft architecture

The Mini-Bee / RED VTOL concept is not only a flying vehicle study. It is also a certification-oriented design exercise.

The central question is simple:

How can an innovative hybrid VTOL aircraft be designed from the beginning with certification, safety and operational approval in mind?

This question is essential because a VTOL aircraft cannot be evaluated only through performance. It must also be understandable by the authority, technically justified, testable, and traceable.

RED VTOL and ALTEN Solidaire

RED VTOL is associated with the humanitarian and emergency medical orientation of the project.

The RED VTOL vision gives the Mini-Bee concept a concrete use case: a compact VTOL aircraft able to support medical aid, rapid response, local mobility, and potentially emergency transport missions.

The name RED VTOL is linked to the idea of a VTOL vehicle for emergency medical service, or VEMS. This mission orientation creates strong design and certification implications:

• the aircraft must be safe in degraded modes;
• the lift and thrust system must be robust;
• the operational use must be clearly defined;
• the pilot and crew logic must be considered;
• medical or public-service missions may bring additional constraints;
• the aircraft must be credible not only as a prototype, but as a future operational system.

ALTEN Solidaire appears in the presentation as a collaborative support framework.

It refers to the involvement of ALTEN through a solidarity or skills-based contribution logic, with Christophe Marionneau, ALTEN Sud-Ouest for ALTEN Solidaire, mentioned in the presentation credits.

In this context, ALTEN Solidaire contributes to the technical structuring of the certification analysis. The value is not only to produce a document, but to help transform the project into a more rigorous engineering framework.

This type of collaboration is important for Mini-Bee because certification requires several levels of expertise:

• aircraft architecture;
• systems engineering;
• safety analysis;
• regulatory interpretation;
• electric and hybrid propulsion;
• rotorcraft certification logic;
• documentation and traceability.

TechnoPlane is identified as the coordinator of the Mini-Bee project, while RED VTOL and ALTEN Solidaire contribute to the broader collaborative R&D and certification preparation effort.

Objective of the certification framework

The purpose of the certification framework is to define the regulatory environment in which Mini-Bee / RED VTOL could be positioned.

The presentation has four main objectives:

Objective	Meaning for the project
Classify the aircraft	Understand whether the aircraft is treated as a rotorcraft, a VTOL-capable aircraft, or both.
Identify applicable texts	List the EASA certification specifications and special conditions that influence design choices.
Assess rule maturity	Understand where VTOL-capable aircraft regulation is mature, evolving, or still uncertain.
Prepare future evidence	Anticipate the analyses, tests and demonstrations needed to support certification.

Certification snapshot

Figure 2. Three-level certification logic: aircraft framework, system architecture, and compliance evidence.

Level	Main question	Main output
High Level	Where does Mini-Bee fit in the EASA framework?	Aircraft category and certification basis
Medium Level	Which rules apply to each system?	System and sub-system certification map
Low Level	Which evidence proves compliance?	Analyses, tests, inspections, simulations and reports

High Level — aircraft positioning

The high-level framework defines the regulatory positioning of Mini-Bee / RED VTOL.

The current logic is to consider the aircraft as:

• a small rotorcraft under CS-27;
• with VTOL-capable characteristics under SC-VTOL-02.

This is the main certification idea of the presentation.

CS-27 provides the small rotorcraft basis. SC-VTOL-02 covers the specific aspects of VTOL-capable aircraft.

Figure 3. Mini-Bee positioned between CS-27 small rotorcraft logic and SC-VTOL-02 VTOL-capable aircraft logic.

Main EASA references

EASA is the official European authority for aviation certification.

For the Mini-Bee / RED VTOL project, all certification assumptions must be traced back to official EASA documents, with the correct issue date, amendment level and applicability.

Reference	Role in the framework
CS-27	Main basis for small rotorcraft certification.
SC-VTOL-02	Special condition for small-category VTOL-capable aircraft.
CS-VLR	Possible reference for very light rotorcraft, only if the design fits its restrictions.
CS-29	Reference for complex rotorcraft aspects or if the aircraft exits CS-27 boundaries.
CS-E	Certification specifications for engines.
SC E-19	Special condition for electric and hybrid propulsion systems.
CS-P	Certification specifications for propellers.
CS-26	Additional airworthiness specifications for operations.
AMC-20	Acceptable means of compliance for products, parts and appliances.
CS-34	Aircraft engine emissions and fuel venting.

Figure 4. EASA reference map for the Mini-Bee / RED VTOL certification framework.

System and sub-system logic

The medium-level framework translates the aircraft-level certification basis into system and sub-system references.

For Mini-Bee / RED VTOL, the main technical domains are:

• engine;
• electric and hybrid propulsion system;
• propellers and rotors;
• high-power electrical architecture;
• lift / thrust system;
• operational airworthiness;
• emissions and fuel venting;
• environmental constraints.

The important point is that Mini-Bee cannot be certified only as a list of independent components.

The aircraft must be understood as an integrated system.

In particular, the complete lift / thrust system must be considered as a chain from energy source to thrust production.

Lift / thrust system chain

The lift / thrust system is the core technical object of the Mini-Bee / RED VTOL certification study.

It includes:

Chain element	Certification attention point
Fuel / battery	Energy availability, storage, safety and endurance.
Engine	Certified status, installation, operating limits and failure modes.
Generator	Electrical generation, reliability and integration with the hybrid chain.
Power electronics	High-voltage distribution, thermal control, EMC and safety.
Motors	Redundancy, monitoring, degraded modes and thrust command.
Rotors / propellers	Loads, vibration, thrust generation, noise and failure behaviour.
Lift	Aircraft controllability, stability and safety in normal and degraded conditions.

Figure 5. Lift / thrust system chain from energy source to distributed lift.

Certification risks

The presentation highlights several certification risks that must be controlled early.

Risk	Why it matters
CS-27 / SC-VTOL boundary	Mini-Bee combines rotorcraft behaviour and VTOL-capable characteristics.
Possible CS-29 drift	Mass, occupants, system complexity or operations may increase certification expectations.
Hybrid propulsion	The complete energy and propulsion chain may become a safety-critical integrated system.
High electrical power	EWIS, EMC, power electronics and electrical safety must be justified.
Distributed lift	Failure cases and degraded modes must be clearly demonstrated.
VEMS mission	Medical or public-service missions may create additional operational constraints.

Low Level — evidence and demonstration

The low level is the level of concrete proof.

Certification is not based only on design intention. It is based on evidence.

Typical evidence includes:

• requirement allocation;
• safety analyses;
• calculations;
• system schematics;
• bench tests;
• HIL / SIL simulations;
• inspection reports;
• environmental qualification;
• flight test preparation;
• flight test reports;
• compliance documentation.

The purpose of this work is to connect each certification requirement to a verifiable means of compliance.

This can include:

Analysis	Test	Simulation	Inspection	Demonstration
Safety studies	Bench tests	HIL / SIL	Installation checks	Flight evidence

Certification pathway logic

The certification pathway should be progressive.

It should move from regulatory positioning to detailed evidence:

Step 1	Step 2	Step 3	Step 4	Step 5
Aircraft classification	Applicable rules	System allocation	Evidence production	Testing and approval

The presentation therefore supports a structured development logic:

• first define the aircraft category;
• then identify the applicable EASA texts;
• then allocate requirements to systems and sub-systems;
• then prepare the evidence matrix;
• then organize tests, analyses and demonstrations.

What this work brings to the project

The RED VTOL / ALTEN Solidaire certification work brings structure to the Mini-Bee project.

It helps the project move from a conceptual aircraft architecture to a more credible engineering path.

The main benefits are:

• better understanding of EASA certification logic;
• clearer positioning between CS-27 and SC-VTOL-02;
• identification of system-level certification references;
• early detection of regulatory risks;
• preparation of future compliance evidence;
• improved design discipline;
• stronger credibility for partners, authorities and future operators.

Conclusion

Mini-Bee / RED VTOL should currently be considered as a small rotorcraft with VTOL-capable characteristics.

The most credible certification logic is based on:

• CS-27 as the small rotorcraft basis;
• SC-VTOL-02 for VTOL-capable aspects;
• SC E-19 for electric and hybrid propulsion;
• CS-E for engines;
• CS-P for propellers;
• additional references such as CS-26, AMC-20, CS-34, CS-VLR and CS-29 when relevant.

The certification framework is not only a regulatory checklist. It is a design management tool.

For Mini-Bee / RED VTOL, it helps transform an innovative hybrid VTOL concept into a structured, traceable and progressively certifiable aircraft project.

Useful links

• File:20260422 RedVTOL EASA Certification 01 High Level Framework v2 en.pptx
• Mini-Bee
• Minibee_TRL3
• RED VTOL ONG