I'm writing a book on history of control in flying, and have some questions about DC-3s and other aircraft of early 1930s.
Today most IAS indicators (airspeed) have markings showing key speeds (bugs). Was that done with early DC-3s? It would have been very easy. I've found a picture of a C-47 showing red and yellow marks; but the C-47 was 10 years later. (http://www.propellor.tv/C47%20instrument%20panel.html)
Is there any indication how accurate the early IAS were?
Bonus question: Does anyone know of a CHECKLIST for a DC-3? AFAIK they were not invented until about 1937 for the B-17, and were in widespread use in the USAAF during WW II. But I would love to be proven wrong by an earlier example.
Thank you! Any finders will get a credit in my book.