Therefore , the Hornet suffered from high fuel consumption and poor range .
Unfortunately , the tip speeds on helicopter rotor blades are subsonic , and ramjets are inefficient at subsonic speeds due to low compression ratio of the inlets .
The Hornet suffered from high fuel consumption and poor range .
Unfortunately , the tip speeds on helicopter rotor blades are subsonic , and ramjets are inefficient at subsonic speeds due to low compression ratio of the inlets .