[1] The Brougham prototype was derived from the later M-2 and was powered by a 150 hp Wright-Martin "Hisso"[nb 1] water cooled V8 engine.

[3] The only common parts shared with the famous Spirit of St. Louis and the first Ryan B-1s were the tail surfaces and a few of the wing fittings.

[4] Another reason for the success of the Brougham was its performance at the 1927 National Air Races in Spokane, Washington where Hawks, who had obtained a contract with Maxwell House Coffee, with the now renamed "Miss Maxwell House" came in first for speed in the Detroit news Air Transport Speed and Efficiency Trophy Race.

[4] Later, at the 1928 Ford Tudor Reliability Trial and Air Tour, Hawks placed sixth in "Miss Maxwell House".

[6] Production peaked at 20 per month[1] but was eventually halted by worsening economic conditions in the United States[5] that led to the sale of the Ryan factory in October 1930.

[8] As of 2001, only four complete Broughams were preserved,[9] one at the San Diego Air & Space Museum,[10] and three others which had been modified to look like the Spirit of St. Louis for the 1957 movie starring James Stewart as Charles Lindbergh.

The third movie Ryan was hanging in the Terminal 1 at Lambert Field in St. Louis, Missouri, when it was removed in 1998 Restoration work has continued on another three aircraft, one owned by the Yanks Air Museum[12] and two by Scott Gifford of Hood River, Oregon.