This wasn't a typical RTG. It had stirling engine and was a lot more efficient (made a lot more power per unit weight of Pu) than RTG. I don't think there was

This wasn't a typical RTG. It had stirling engine and was a lot more efficient (made a lot more power per unit weight of Pu) than RTG. I don't think there was any way to save and restart anything if an engine failed as it would have likely destroyed the engine. https://rps.nasa.gov/system/downloadable_items/36_APP_ASRG_Fact_Sheet_v3_9-3-13.pdf https://rps.nasa.gov/system/downloadable_items/36_APP_ASRG_F...