I want to know the answer to the following question:
In what year did Frank Shuman patent his solar engine?
All the background I'm provided with is that "He, along with his technical advisor A.S.E. Ackermann and British physicist Sir Charles Vernon Boys, developed an improved system using mirrors to reflect solar energy upon collector boxes, increasing heating capacity to the extent that water could now be used instead of ether.". Is that enough to answer the question?
Answer: no