The resulting R - 2 was named for the Ibis bird .
Was very similar to the RS - 1 , using a similar gull wing of 48 ft ( 14.6 m ) span and an all - flying tail .
The resulting R - 2 was named for the Ibis bird and was very similar to the RS - 1 , using a similar gull wing of 48 ft ( 14.6 m ) span and an all - flying tail .