Project Suntan – The Lockheed CL-400

Get 81% off with the NordVPN 3-year deal and 4 months free and the NordPass password manager app with the coupon code “curiousdroid” deal here:
Coupon code: curiousdroid

After the U-2 but before the SR-71 was created, another reconnaissance aircraft was planed by the USAF and designed by Lockheed’s Kelly Jonhson to take the place of the CIA’s U-2.
This that would be powered by liquid hydrogen and fly 30,000ft higher than the U-2 at 100,000 ft but the difficulties of working with hydrogen at that time put paid the to project. However the top-secret project did ultimately lead to the SR-71 and the advanced use of hydrogen in the upcoming space programs. This is the story of the Lockheed CL-400.

Written, researched and presented by Paul Shillito
Images and footage: NACA, NASA, Lockheed, Pratt & Whitney, Jozef Gatial

Music from the Youtube library
Saving the World by Aaron Kenny
The End by Quincas Moreira
The Framework by Jingle Punks
The Long Ascent by Cooper Cannell
Arp Ascent by DivKid
Cosmic Groove by Cooper Cannell
Descent by Houses of Heaven
Divider by Chris Zabriskie is licensed under a Creative Commons Attribution licence (

A big thank you also goes to all our Patreons too 🙂
Alan Johns
Allan Versaevel
Alok G Singh
Andrew SMITH
Bobby Up
Chad Mellor
Cody Belichesky
Collin Copfer
Damien Pasche
Daniele Noacco
David Stevens
Giacomo Catenazzi
Henri Saussure
Jared Swanson
Johan Rombaut
john edwards
Jonathan Merage
Jonathan Travers
Juerg Hurni
Kai Spuhler
Kevin Hinnen
Lorne Diebel
Loyd Hamilton
László Antal
Mark Koontz
Matthew MacKenzie
Peter Barber
Prashanth Ruthala
stefan hufenbach
Thomas Branch
Walt Dennig

Flattr this!