Altitude(ft.).Speed(mph)/Climb(fpm)
S.L.......345/3,180
10,000.383/2,920
20,000.417/2,470
32,000.435/1,100
I think this is the proper specs for the D-30, either way it will be hard beat it at altitude.
I dont know the speeds of the Dora or 109K so if someone could post those for a better comparison that would be great.