Sparweb
Aerospace
- May 21, 2003
- 5,119
This was fun to read:
This follows an article on the same subject in Aviation Week by Steve Trimble (for those who subscribe).
There are some great quotes in the VTOL article:
On further consideration, however, I'm not sure I fully agree. I looked up the Westland Lynx and find that it's pretty close to the performance targets cited in the article. No idea what operational targets are in the Army specification (and unlikely to find out!).
FARA spec
First flight: 2023
Maximum speed: 180 knot
Engine: one 3,000-shp GE T901 Improved Turbine Engine Program (ITEP)
Rotor: 40 ft diameter
Max gross weight: 14,000 lb
Westland Lynx
First flight: 1977
Maximum speed: 175 knot (with a 216 knots FAI record)
Engines: 2, combined power 2,700-shp
Rotor: 42 ft diameter
Max gross weight: 11,750 lb
So I don't yet see the physics problem. The Lynx is a bit light for the FARA spec, but not much. I can't see from the information provided how the Lynx and FARA compare in both payload and cabin seating, which are usually more important to the mission. Given the dual rotors of the FARA spec, there's a lot more structural weight expected there. So the Lynx may be closer to the useful payload than you'd think at first glance. For sure, the Lynx doesn't look anything like the counter-rotating rotor proposal that Sikorsky is showing. Maybe this colonel just objects to the ugliness.
This follows an article on the same subject in Aviation Week by Steve Trimble (for those who subscribe).
There are some great quotes in the VTOL article:
Col. Greg Fortier said:
Mike Hirschberg said:
On further consideration, however, I'm not sure I fully agree. I looked up the Westland Lynx and find that it's pretty close to the performance targets cited in the article. No idea what operational targets are in the Army specification (and unlikely to find out!).
FARA spec
First flight: 2023
Maximum speed: 180 knot
Engine: one 3,000-shp GE T901 Improved Turbine Engine Program (ITEP)
Rotor: 40 ft diameter
Max gross weight: 14,000 lb
Westland Lynx
First flight: 1977
Maximum speed: 175 knot (with a 216 knots FAI record)
Engines: 2, combined power 2,700-shp
Rotor: 42 ft diameter
Max gross weight: 11,750 lb
So I don't yet see the physics problem. The Lynx is a bit light for the FARA spec, but not much. I can't see from the information provided how the Lynx and FARA compare in both payload and cabin seating, which are usually more important to the mission. Given the dual rotors of the FARA spec, there's a lot more structural weight expected there. So the Lynx may be closer to the useful payload than you'd think at first glance. For sure, the Lynx doesn't look anything like the counter-rotating rotor proposal that Sikorsky is showing. Maybe this colonel just objects to the ugliness.
