How does this replace my Excel and Python workflow?

Instead of maintaining fragile spreadsheets and scripts, you get integrated tools with automatic data flow. Geometry feeds directly into aerodynamics, which feeds into performance analysis.

How do I hand off to CAD and detail design?

Export validated geometry to STEP, STL, and other standard formats. Use these for wind-tunnel models, prototypes, or as starting geometry in CATIA/SiemensNX. aircraftdesign.io remains useful after handover—for trade studies, configuration control, and tracking original design assumptions.

Is this accurate enough for conceptual design?

Yes. We use validated aerospace methods (lifting line, panel methods, CFD) benchmarked against industry-standard tools and academic test cases. For early-phase design, our accuracy is more than sufficient to make informed decisions and guide detail design.

Sign up with your email to join the waitlist. We'll notify you when early access becomes available. No payment information required—just your email to stay updated.

What happens after I sign up?

You'll receive a confirmation email and be added to our waitlist. We'll send updates as we approach the early access launch, and you'll be among the first to get access when we're ready.

What can the platform actually do?

Parametric aircraft geometry design with real-time 3D visualization. Aerodynamic analysis from handbook methods to high-fidelity CFD. Weight and balance estimation with center of gravity calculation. Performance analysis for range, endurance, and climb rate. Configuration management and certification requirements tracking. Export to standard formats (STEP, STL) for CAD handoff.

Terms of Service | aircraftdesign.io

Last updated: January 2026

1. Acceptance of Terms

1.1 These Terms of Service ("Terms") govern your use of aircraftdesign.io ("the Service"), operated by Nils Kleemann as identified in our Legal Notice.

1.2 By accessing and using the Service, you agree to be bound by these Terms. If you do not agree to these Terms, please do not use the Service.

2. Description of Service

aircraftdesign.io is a web-based platform for aircraft conceptual design, analysis, and optimization. The Service includes tools for parametric geometry design, aerodynamic analysis, weight estimation, and performance calculations.

3. Account Registration

3.1 When you create an account on aircraftdesign.io, you agree to: (a) provide accurate and complete registration information; (b) maintain the security of your account credentials; (c) receive email communications about platform updates and service-related notifications; and (d) accept responsibility for all activity under your account.

3.2 You can unsubscribe from promotional emails at any time using the link provided in our emails.

4. Early Access Subscription

4.1 The Early Access subscription provides immediate access to the platform for a one-time payment of €299.

4.2 The Early Access subscription includes: (a) an access period of 12 months from the date of purchase; (b) 30,000 compute credits for the Early Access period; (c) full access to all current and upcoming features during Early Access; and (d) the option to purchase additional compute credits at any time if needed.

4.3 Compute credits are consumed when running analyses (aerodynamic, structural, performance). Unused credits roll over to the next billing cycle as long as your subscription remains active.

4.4 Compute credits are non-refundable. All unused credits expire immediately upon plan cancellation or subscription termination.

5. Money-Back Guarantee

5.1 We offer a 30-day money-back guarantee for Early Access subscribers. If aircraftdesign.io does not deliver value within your first 30 days, contact us for a full refund.

5.2 Refund requests must be made within 30 days of purchase. We may conduct a brief exit interview to understand how we can improve.

5.3 Refunds are processed to the original payment method. Any compute credits purchased separately (credit top-ups) are non-refundable.

6. Termination

6.1 You may cancel your subscription at any time. No refunds are provided for partial periods unless covered by the money-back guarantee. All unused compute credits expire immediately upon cancellation.

6.2 We reserve the right to terminate any user account at our discretion, including but not limited to violations of these Terms. In such cases, we will provide a pro-rata refund for the remaining subscription period, excluding any consumed or separately purchased compute credits.

7. Data Retention

7.1 Following termination or expiry of your subscription, you will have 90 days to export or download your project data.

7.2 After the 90-day period, we may delete your data from our servers without further notice.

7.3 You are responsible for maintaining your own backups of important project files. aircraftdesign.io is not liable for any data loss.

8. User Content and Data Ownership

8.1 You retain all ownership rights to the aircraft designs, project data, and other content you create or upload through the Service ("User Content").

8.2 You grant aircraftdesign.io a non-exclusive, worldwide, royalty-free license to use, store, and process your User Content solely for the purpose of providing and improving the Service.

8.3 You represent and warrant that you have all necessary rights to upload and use your User Content, and that your User Content does not infringe any third-party intellectual property rights.

9. Service Availability

We strive to offer constant availability of the Service but cannot warrant uninterrupted access. The Service may be temporarily unavailable due to maintenance, updates, or circumstances beyond our control. We are not liable for any downtime or service interruptions.

10. Pricing Changes

aircraftdesign.io reserves the right to update pricing for compute credits and future subscription plans at any time. Existing Early Access subscriptions will not be affected by price changes during their 12-month access period.

11. User Responsibilities and Export Controls

11.1 You agree to: (a) provide accurate information when registering; (b) not use the Service for any unlawful purpose; (c) not attempt to gain unauthorized access to the Service; and (d) not interfere with or disrupt the Service.

11.2 You shall not reverse engineer, decompile, or disassemble any portion of the Service, except to the extent permitted by mandatory applicable law.

11.3 You shall comply with all applicable export control laws and regulations, including those of the European Union, Germany, and the United States. You shall not use the Service from any country subject to comprehensive sanctions or if you are a person or entity on any applicable sanctions list.

11.4 You acknowledge that the Service may be subject to export restrictions and agree not to export or re-export any technical data or analysis results in violation of applicable laws.

12. Intellectual Property

The Service and its original content, features, and functionality are owned by aircraftdesign.io and are protected by international copyright, trademark, and other intellectual property laws.

13. Disclaimer

13.1 The Service is provided "as is" without warranties of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement.

13.2 aircraftdesign.io provides aircraft simulation software. You acknowledge that aircraftdesign.io is not responsible for: (a) the correctness, completeness, or accuracy of any data you upload or input; (b) any conclusions drawn from any analysis, simulation, calculation, or optimization performed by or through the Service; (c) the technical, scientific, regulatory, or commercial feasibility of any aircraft design or project; and (d) any decisions made based on the results of our tools.

13.3 The Service is not a substitute for flight testing, wind tunnel testing, structural testing, or any regulatory certification process. Analysis results are intended for preliminary design exploration and must be validated independently for any safety-critical, certification, or production applications.

13.4 The Service is intended for use by qualified engineers and professionals who can independently evaluate the validity and applicability of simulation results to their specific use case.

13.5 You assume full responsibility for all engineering decisions made based on the results of the Service. aircraftdesign.io shall not be liable for any consequences arising from the use of simulation results in design, manufacturing, certification, or operation of aircraft.

14. Indemnification

14.1 You agree to indemnify and hold harmless aircraftdesign.io and its officers, employees, and agents from any claims, damages, losses, or expenses (including reasonable legal fees) arising from: (a) your use of the Service; (b) your violation of these Terms; (c) your violation of any third-party rights, including intellectual property rights; or (d) your User Content.

14.2 aircraftdesign.io will promptly notify you of any such claim and reasonably cooperate with your defense. You may not settle any claim without our prior written consent.

15. Limitation of Liability

15.1 aircraftdesign.io shall be liable without limitation for damages arising from injury to life, body or health, for intent and gross negligence, and for claims under the German Product Liability Act.

15.2 For breaches of essential contractual obligations (obligations whose fulfillment is necessary for the proper execution of the contract), liability for slight negligence is limited to foreseeable, typically occurring damages.

15.3 In all other cases, liability for slight negligence is excluded.

15.4 Subject to the above, our total liability shall not exceed one hundred percent (100%) of the fees paid by you in the twelve (12) months preceding the event giving rise to the liability.

15.5 The disclaimers and limitations set forth in Section 13 apply without limitation.

16. Changes to Terms

We reserve the right to modify these terms at any time. We will notify users of any material changes via email or through the Service. Continued use of the Service after such modifications constitutes acceptance of the updated terms.

17. Governing Law and Jurisdiction

17.1 These Terms shall be governed by and construed in accordance with the laws of the Federal Republic of Germany. The United Nations Convention on Contracts for the International Sale of Goods (CISG) shall not apply.

17.2 The exclusive place of jurisdiction for all disputes arising out of or in connection with these Terms shall be Darmstadt, Germany.

18. Severability

Should any provision of these Terms be or become ineffective or invalid in whole or in part, the effectiveness and validity of the other provisions shall not be affected. Such ineffective or invalid provision shall be replaced by a provision which comes as close as legally possible to what the parties would have agreed pursuant to the meaning and purpose of the original provision.

19. Entire Agreement

These Terms, together with any applicable Agreement, represent the entire agreement between you and aircraftdesign.io regarding the Service and supersede all prior negotiations, agreements, and understandings between the parties, whether written or oral.

20. Contact

If you have any questions about these Terms, please contact us at: info@aircraftdesign.io