Could you please provide the source of your information and, in particular whether it refers mto the Vought Scout in general or the XRM-91A only.
Here is what I have on the XRM-91A:
The designation XRM-91A referred to a Ford managed development of the Vought Blue Scout Junior sounding rocket. The first flight was on 21 September 1960 (as Nudets-1), followed by flights on 8 November 1960 (as Nudets-3), 17 August 1961 (as Nudets-8) and 4 December 1961 (as Nudets-9).
There were further Blue Scout flights until 24 November 1970, but these are not considered XRM-91 flights. The sounding rockets had serials in the range 60-6082/6093 which also included the XRM-89, XRM-90 and XRM-92.
Just to complete the picture, here is what I have for the others:
The designation XRM 89A referred to a Ford managed development of the Vought Blue Scout I sounding rocket. The first flight was on 7 January 1961 (known as Nudets-4), followed by a flight on 9 May 1961 (as Nudets-7). There was a further flight on 12 April 1962 which carried a re-entry vehicle.
The designation XRM 90A referred to a Ford managed development of the Vought Blue Scout 2 sounding rocket. The first flight was on 3 March 1961 (as Nudets-5) followed by another two launches on 12 April 1961 (as Nudets-6) and 1 November 1961. The latter flight was also known as Mercury-Scout (MS)-1 and it failed after 30 seconds.
The designation XRM 92A referred to a Ford managed development of the Vought Scout X-1 sounding rocket. The sounding rockets were in the serial in the range 60 6082/6093.
Seven flights of the Scout X-1 were undertaken between 1 July 1960 and 19 October 1961 of which one flight, 4 October 1960, carried a USAF Nudets experiment. Probably that flight might have been the XRM-92A flight.
