Heliciel in your AI assistant

Heliciel is a propeller, wing and turbine engineering software. Its MCP connector lets an AI assistant (Claude, ChatGPT, Le Chat, and any MCP-capable client) drive a real Heliciel instance: every number your assistant gives you then comes from a BEM (Blade Element Momentum) computation, not from the assistant's general knowledge — and the geometry it designs is exportable for manufacturing (STL, IGES, OBJ).

1. What you need

• A Heliciel MCP pass (day, week or month), purchased on https://www.mecaflux.com/suite/en/pass_mcp.php. Your pass page shows your access and its remaining duration.
• An AI assistant that supports MCP connectors (sometimes called « connectors », « apps » or « plugins » depending on the client).

2. Connect

The server address is the same for everyone:

https://mcp.heliciel.com/mcp

In your assistant, look for the feature named « connector » or « MCP » (in ChatGPT it lives in the developer/apps settings; in Claude under connectors; in Le Chat under connectors), add a custom connector with the address above, and follow the authorization: a Heliciel page opens and asks for your pass key. Paste either the key itself or the full access address shown on your pass page — both are accepted. That is all: no token to copy into URLs.

Your pass page on mecaflux.com also offers one-click setup buttons for some clients (Cursor, VS Code) and ready-to-paste configuration blocks for the others.

3. First steps — example prompts

Just talk to your assistant. A few requests that work well:

• « I have an 8 kg drone with 4 motors and a 150 % thrust margin. Size the propellers. »
• « Design an aircraft propeller: 50 kW, 120 km/h, max diameter 1.5 m, 2 blades. »
• « Load a wind turbine, 3 blades, 4 m diameter, 8 m/s wind — what power can I harvest? »
• « Design a Kaplan runner for 5 m³/s and a 4 m net head, then show me the efficiency curve. »
• « Compare 2 vs 3 blades and show me the best one in 3D. »

The assistant will ask you for the missing parameters (diameter, speed, regime…) rather than assume them: the levers of a design — blade count, diameter, chord law, regime — are your choices, and Heliciel refuses to invent them.

4. What to expect

• Real numbers. Thrust, torque, power, efficiency, cavitation, tip Mach: everything is computed by Heliciel and reported with its own design alerts. A computation that fails says so — it is never replaced by a guess.
• An interactive 3D view. On clients that support embedded apps, the blade can be rotated in the conversation, element by element; elsewhere you get an image plus a link to a standalone 3D viewer. Every image of results comes from Heliciel itself.
• Exports. STL (3D printing, CFD), IGES (CAD), OBJ, blade sections (JSON), analysis tables (CSV). Download links are valid for 60 minutes; your projects are not archived after the session (see the privacy policy).
• One computation at a time. Long searches (design-point RPM search, sweeps, genetic optimization) can take minutes; the assistant can query their progress while they run.

5. Troubleshooting

• « 401 » or authentication error: your pass has expired, or the key was mistyped. Check the remaining duration on your pass page.
• The assistant does not see the new tools: assistants cache the tool list. Look for the « refresh » action on the connector in your assistant's settings, then start a new conversation.
• A result looks like a screenshot but contains no Heliciel link: ask the assistant whether the image came from the Heliciel visualiser tool. Genuine results always can be traced to a tool call.
• Anything else: contact@mecaflux.com.

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