A successor model d, the Bell X-1A, with greater fuel capacity and therefore longer rocket burn time, reached a speed of more than 1,600 miles per hour (2600 km/h) in 1954.
A new low-pressure propellant system with a slightly increased propellant capacity was fitted to the X-1D.
Some minor changes were also made to the avionics
Plastic model kit
- with photoetched parts
- with resin parts
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