== Change in Engine From OX-5 to OXX == 

 Shock, James R., U.S. Navy Airships 1915-1962, 2001, Atlantis Productions, Edgewater Florida, ISBN 978-0963974389, page 15, describes the engine of the B-type Airship as either a Curtiss OX-5 or Hall Scott. Mr. Shock gives the horse power of the B Class engine as 100 hp. Several credible sources such as http://www.enginehistory.org/Curtiss%20OX5 http://www.aviation-history.com/engines/ox5.htm http://stcroix.50webs.com/pages/artricle_ox5.html and .pdf and http://ox5.org/ox5-engine/  all give 90 hp as as the horse power of the OX-5. I cannot recall ever seeing anything than 90 hp given for the OX-5. The Naval History and Heritage Command http://www.history.navy.mil/research/histories/naval-aviation-history.html has pdf files showing the original Aircraft History Cards for the B Class Airships at http://www.history.navy.mil/research/histories/naval-aviation-history/aircraft-history-cards/aircraft-history-card-listing-a-52-through-a-999/bureau-numbers-a-201-to-a-299.html The B Class Bureau Numbers were A-235 through A-250. With the exception of A-249  (B-15) and A-250 (B-16) which were built by the Connecticut Air Corp. the engine listed is the Curtiss OXX (A-249 & A-250 were delivered with Hall Scott engines). The horse power of both the OXX and Hall Scott is given as 100 hp. The OX-5, one of the OX series is listed as a 90 h.p. The Curtiss OXX was one of the Navy's most common engines being used on the standard trainer, the N-9, and the Curtiss F flying boat. Given that the Aircraft Record Cards are a primary source I have chosen to treat them as being more likely correct than Mr. Shock's history. Mr. Shock does not even agree with himself as he specifies the B Class engine as a "Curtiss OX-f 100 horsepower on the Goodyear/Goodrich Airships". 

 I have chosen to change the engine listed for the B Class from OX-5 to OXX. 

 Mark Lincoln