The following sections detail the various Blueprint and CAD packages available online. Please help support my work.
Feel free to make offers on specific datasets…just ask, and I will consider any reasonable offer.
Drop me a line for more details. hughtechnotes@gmail.com.
(A) 3D CAD PARTS LIBRARY AND DATA SPREADSHEETS ONLINE:
Over 300 CAD models as Autodesk Inventor IPT files (v2024 iParts) with all dimensions listed in MS Excel spreadsheets. Parameter names match the original military official specifications. Updated 28 Aug 2024. This library is included with all CAD/Datasets but is also now available separately for only £15…just send me an email for details.
Library of original Inventor iPart files…complete list:

If you don’t use Inventor then download a 30-trial copy from Autodesk and easily review, save, and convert the files to whatever suits your requirements.
For further details contact me at hughtechnotes@gmail.com
Sample Library Content:
AN161/MS21252 Rev P: CLEVIS END, TURNBUCKLE, CLIP LOCKING:
Military Spec: MIL-DTL-781 & QPL-781.
Part # AN161-8 to AN161-175 (L & R).
Stock Numbers MS21252.
3D iPart (ipt), Spreadsheet.
AN667/MS20667 Rev J: TERMINAL, WIRE ROPE, SWAGING, FORK END:
Military Spec: MIL-DTL-781 & QPL-781.
Part # AN667-2 to AN667-24.
Stock Numbers MS20667.
3D iPart (ipt), Spreadsheet. Dimensions to As-Fitted; swaged.
AN668/MS20668 Rev G: TERMINAL, WIRE ROPE. SWAGING, EYE END:
Military Spec: MIL-DTL-781 & QPL-781.
Part # AN668-2 to AN668-32.
Stock Numbers MS20668.
3D iPart (ipt), Spreadsheet. Dimensions to as-Fitted; swaged.
AN669/MS21260 Rev M: TERMINAL, WIRE ROPE. SWAGING, LOCK STUD:
Military Spec: MIL-DTL-781 & QPL-781.
Part # AN669-2 to AN669-32.
Stock Numbers MS21260.
3D iPart (ipt), Spreadsheet. Dimensions to as-Fitted; swaged.
AN155/MS21251 Rev M: TURNBUCKLE BODY, CLIP LOCKING:
Military Spec: MIL-DTL-8878 & QPL-8878.
Part # AN155-8 to AN155-80. (+2 unknown)
Stock Numbers MS21251.
3D iPart (ipt), Spreadsheet.
AN21 thru 37/ NASM21 thru NASM37: BOLT, CLEVIS:
-
-
- Part # AN21-5 to AN21-32
- Part # AN22-5 to AN22-32
- Part # AN23-8 to AN23-38
- Part # AN24-8 to AN24-38
- Part # AN25-9 to AN25-40
- Part # AN26-9 to AN26-40
-
3D iPart (ipt), Spreadsheet.
AN3 thru AN20, AN310, AN960: BOLT, CASTLE NUT, WASHER:
Separate Model files for:
- Part # AN3 to AN20
- Part # AN310
- Part # AN960
3D iPart (ipt), Spreadsheet.
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(B) FROM THE ARCHIVES:
A collection of Blueprint archives is available online for educational and research purposes.
The blueprint archives include all original scans from microfilm, manuals, reports, specifications, and photos. For details or inquiries, just drop me a line at hughtechnotes@gmail.com.
You have the option to purchase any individual Blueprint archive or the complete Blueprint collection, which is approximately 200GB, for only £89.00 (GBP) throughout November. The regular price is £439.10, so you save over 75%. This is a genuine offer.
PayPal is the preferred payment method, and download links will be sent to the recipient once payment is received. [PAYPAL LINK]… please include a contact email.

(C) ORDINATE/CAD COLLECTION:
This is the full list of all the available professionally prepared Cad/Ordinate projects as featured in the many blog articles. It is essentially a comprehensive dimensional study. These projects are accurately derived from original manufacturers’ drawings and blueprints. This compilation took many years. All sets are available for download. They are designed to help you get a head start on your project and will save you weeks of work.







- P-51 Mustang Ordinate/CAD
- B-25 Mitchell Ordinate/CAD
- F6F Hellcat Ordinate/CAD
- F4F Wildcat Ordinate/CAD
- Grumman Goose Ordinate/CAD
- New P-39 Airacobra Ordinate/CAD. Updated June 2023.
- New P-38 Lightning Ordinate/CAD. Updated June 2023. Probably the most comprehensive dimensional study ever done for the P-38 Lightning.

Thousands of ordinate dimensions are recorded in Excel spreadsheets (mm and inch), DWG drawing profiles, DWG fully dimensioned professionally prepared drawings, supporting blueprints and CAD 3D model files (Parasolid, 3d DWG, STP). All spreadsheets are fully editable so you can adapt the data to suit your own requirements. For details on the purchase, just contact me at hughtechnotes@gmail.com.




Note: These datasets are only available from this blog. Open to offers… Any reasonable offer will be considered… Just get in touch.
The CAD/Ordinate datasets include all study data in CAD, STP, STL and DWG formats alongside a comprehensive list of all known dimensions in Excel spreadsheets.

(D) P-51 MUSTANG MODELS: TAILWHEEL MECHANICAL
Incredibly accurate full-size CAD models professionally prepared, in STL, STP, Parasolid X-T and 3d DWG formats. All internal components, bushings, nuts and bolts are also modelled. Each of these models includes detailed 2D assembly drawings (Autocad DWG) with a full parts list.











CAD Design Services:
Are you looking for assistance with your next restoration or modeling project to turn your vision into a precise, tangible design? We specialize in advanced CAD design, transforming your blueprint from concept to a finished 3D CAD model. Whether you’re creating a replacement product, refurbishing an existing item, or need a detailed 3D model for manufacturing, we deliver designs that are functional, manufacturable, and visually impressive. We take full tolerances into account for downstream processes, whether that involves conventional machining, sheet metal work, or 3D printing prototypes.
🔧 Our Services Include:
- 2D & 3D CAD modeling
- Product design and prototyping
- Assembly drawings and technical documentation
💡 Why choose us?
- Fast turnarounds without compromising quality
- Deep industry experience across multiple sectors
- Seamless collaboration and project transparency
We’d love to explore how we can support your next project. Reply to this email to book a free consultation or request a quote! hughtechnotes@gmail.com
Let’s build something extraordinary.



Dear Hugh, do you have your AN hardware parts in STP format ? I do not believe to be able to import IPT format ? Thanks Eric
Yes all the parts listed are also available in STP format.
Hello Hugh; I have looked at your page where you discuss your work on the Bremen drawings for the FW190. Question: Have you developed a complete set of ordinals for that aircraft or….?
Hi Gerry; It is not quite a full set of ordinates but it does include all available information for the FW190. I can still offer the Fw190 with the Ta152 and all avalble ordinate datasets. Drop me a line at hughtechnotes@gmail.com
Hugh… The work you have done here is amazing, I share the interest in preserving the history and Engineering of these aircraft. I am specifically interested in the P51D and P38. I am hoping to build both of these utilizing composites and bring these birds back to life with modern materials, while staying true to their design principles and powerplants. I don’t believe the only folks that should have the chance to fly these are the 1%ers. Thank you!