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Osprey single-engine takeoff??
I was driving into LAS yesterday and saw 2 Ospreys departing to the east on what looked like single-engines. The right engines were running and the left wasnt until they were in "plane" mode. Is that a thing or were my eyes playing tricks on me??
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- FrmrKSEngr
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Re: Osprey single-engine takeoff??
Eyes were playing tricks. The prop-rotors are cross linked to to make sure both stay turning in an engine out situation.
Re: Osprey single-engine takeoff??
i think your eyes where playing tricks hahahaha
Re: Osprey single-engine takeoff??
FrmrKSEngr wrote:Eyes were playing tricks. The prop-rotors are cross linked to to make sure both stay turning in an engine out situation.
Does this mean the RPM will stay similar on both rotors if there's an engine out? What about prop pitch, is that different on each engine? If there's an engine out, does the remaining engine have the power to keep it airborne, or will it have to do a controlled ditch?
Re: Osprey single-engine takeoff??
JetBuddy wrote:FrmrKSEngr wrote:Eyes were playing tricks. The prop-rotors are cross linked to to make sure both stay turning in an engine out situation.
Does this mean the RPM will stay similar on both rotors if there's an engine out? What about prop pitch, is that different on each engine? If there's an engine out, does the remaining engine have the power to keep it airborne, or will it have to do a controlled ditch?
Really depends on a lot of other conditions -- ambient temp/pressure, weights etc.
Re: Osprey single-engine takeoff??
JetBuddy wrote:FrmrKSEngr wrote:Eyes were playing tricks. The prop-rotors are cross linked to to make sure both stay turning in an engine out situation.
Does this mean the RPM will stay similar on both rotors if there's an engine out? What about prop pitch, is that different on each engine? If there's an engine out, does the remaining engine have the power to keep it airborne, or will it have to do a controlled ditch?
Not a controlled ditch per say but an extremely hurried landing.
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- WIederling
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Re: Osprey single-engine takeoff??
JetBuddy wrote:FrmrKSEngr wrote:Eyes were playing tricks. The prop-rotors are cross linked to to make sure both stay turning in an engine out situation.
Does this mean the RPM will stay similar on both rotors if there's an engine out? What about prop pitch, is that different on each engine? If there's an engine out, does the remaining engine have the power to keep it airborne, or will it have to do a controlled ditch?
rotors should stay in sync. ( as on all twin rotor craft !? )
My guess would be no issues in airplane mode staying airborne.
Landing in semitilted "semiairplane" mode.
Controlled landing in hover.
You won't be able to see the difference in pitch ( from control inputs
helps?:
http://www.pprune.org/archive/index.php/t-421092.html
does the Osprey have anything in the domain of a controlled blade ejection?
Re: Osprey single-engine takeoff??
Interesting answers, thank you for that. The Osprey is a very unique and fascinating design.
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- dragon6172
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Re: Osprey single-engine takeoff??
JetBuddy wrote:Does this mean the RPM will stay similar on both rotors if there's an engine out? What about prop pitch, is that different on each engine? If there's an engine out, does the remaining engine have the power to keep it airborne, or will it have to do a controlled ditch?
There are synchronization shafts that run down the wing between the two transmissions. The prop-rotors will always be at the same RPM and synced. As I recall the test aircraft that crashed near Quantico in 1992 was because there was an engine fire that lead to one of the sync shafts burning up, and then loss of control.
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