![Convair Model 37, a propsosed airliner beased on the XC-99 transport prototype. While Pan Am ordered 15 aircraft for transatlantic service, none were ever built, as the intended gas turbine engines never Convair Model 37, a propsosed airliner beased on the XC-99 transport prototype. While Pan Am ordered 15 aircraft for transatlantic service, none were ever built, as the intended gas turbine engines never](https://preview.redd.it/gdvw89l1use71.png?width=496&format=png&auto=webp&s=e7cc21a8cde877655bb0a3dbefedd072a0e3eb11)
Convair Model 37, a propsosed airliner beased on the XC-99 transport prototype. While Pan Am ordered 15 aircraft for transatlantic service, none were ever built, as the intended gas turbine engines never
![Pan American World Airways Future Postcard : Pan American World Airways : Free Download, Borrow, and Streaming : Internet Archive Pan American World Airways Future Postcard : Pan American World Airways : Free Download, Borrow, and Streaming : Internet Archive](https://archive.org/download/pan-american-world-airways-future-postcard/Pan%20American%20World%20Airways%20Future%20Postcard.jpg)
Pan American World Airways Future Postcard : Pan American World Airways : Free Download, Borrow, and Streaming : Internet Archive
![Convair Model 37, a propsosed airliner beased on the XC-99 transport prototype. While Pan Am ordered 15 aircraft for transatlantic service, none were ever built, as the intended gas turbine engines never Convair Model 37, a propsosed airliner beased on the XC-99 transport prototype. While Pan Am ordered 15 aircraft for transatlantic service, none were ever built, as the intended gas turbine engines never](https://preview.redd.it/m3z6qy4wtse71.png?width=504&format=png&auto=webp&s=2aec730be162364b0e13c85babc353c56100efa0)