Some important bits of information that you should be aware of when flying this aircraft!
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Please read through these notes, and the ones included in the accompanying "YS-11 flight data.txt", which
contains a lots of information about flying the real plane.


The throttle panel has following controls and indicators that are essential for operating the aircraft:
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- Two throttle levers, one for each engine. Moves the "Low Stop"
lever automatically to "flight fine pitch" position as either lever
is advanced to takeoff power. Takeoff power setting (15000 RPM)is indicated by the
topmost red line.
- A fully functional "Low Stop" lever which has two settings:
- "ground fine pitch" allows the propeller blade angle to decrease below 13 deg
for ground control and after touchdown deceleration.
- "flight fine pitch" allows a minimum blade angle of 14 deg. At
this setting propeller operates as normal constant speed type
propeller, automatically adjusting the blade angle.
- Two fully functional "high pressure fuel cock" levers, one for each
engine. Each lever has four positions:
- "HSWL" or "High Stop Withdrawal" this position manually
retracts the safety lock in the propeller which prevents the
propeller blade angle from decreasing to a flat-pitch, high-
drag condition during takeoff and cruise if the propeller
windmills without engine power input for any reason.
- "ON" allows fuel to flow to the engine.
- "OFF" cuts off the fuel flow to the engine.
- "Feather" allows the propeller to be manually feathered.
- Two buttons for feathering/unfeathering the propellers, note that feathering
is only available when "high pressure fuel cock" is in "Feather" position.
Unfeathering is always available.
- Six indicator lights for the status of propeller pitch locks.
Starting form left these are:
- "Low Stop Unsafe" light indicates that the low stop lock has been removed
and thus blade angle can decrease below 14 deg.
- "no.1 Below Low Stop" indicates when no1. (left) propeller
blade angle is at 13 degrees or below.
- "no.2 Below Low Stop" indicates when no2. (right) propeller
blade angle is at 13 degrees or below.
- "no.1 High Stop Removed" indicates when no1. propeller safety
lock has been withdrawn either manually or automatically when
the blade angle of both propellers is below 29.5 degrees, or other
propeller has been feathered and the other is below 29.5 degrees.
- "no.2 High Stop Removed" same as above but for right side prop.
- "High Stop Unsafe" light indicates that the blade pitch of either
propeller, or both, is below 29.5 deg.
- a switch for controlling the left engine propeller brake. Since FS
does not support propeller brakes it currently feathers the left
propeller and locks it in feathered position stopping the propeller
rotation faster. In YS-11, the prop brake is only installed for No.1 engine.
This switch has two settings:
- "Brake ARM" arms the propeller brake, so that when left engine
fuel flow is cut-off it automatically feathers the propeller. No
effect until the fuel flow has been cut.
- "OFF" turns off the propeller brake and allows manual unfeathering.

- The plane now has prop autofeather system. The autofeather happens when if throttle-levers are above 12800 RPM position (the lower red line in the gauge), and torque pressure is below 50 PSI. Important note, if you move the joystick's throttle too fast, it may initiate autofeather! This is because it is possible to move the throttles faster than on the real plane. So, you'll have to advance the throttles so that you DO NOT exceed the 12800 RPM position BEFORE the torque pressure has reached the minimum of 50 PSI. In case you have trouble getting the autofeather to work, there is a small switch provided that will allow you to turn the autofeather system off.

Engine failures:
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- The engines will now fail if either maximum allowed temperature (940C), or RPM limit (16300) is exceeded. Both engines won't fail simultaneously, and the exact point where failure occurs does vary a bit from time to time. Two engine overheat warning lights have been added to the auxiliary panel. When either one illuminates, you'll have to reduce engine power to prevent failure.


About using the Water/Methanol injection:
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- To turn on the W/M system, turn on the two switches located in the throttle panel. The two lamps will ignite when the injection starts (engine RPM is above 14800 RPM). In real plane, these two lights will lit up immediatly when turning the switches. For testing purposes, we have set the lights to lit up only when the actual injection is taking place.

- You should activate (or arm) the W/M injection system before starting taxi. The acutal injection starts when engine RPM is advanced to 14800 RPM or above. You should never need to run engines much above 12000 RPM while taxiing. The plane should start rolling around 12500 RPM, depending on the aircraft weight.

- After takeoff, and while maintaining runway heading, you should disengage the W/M system after retracting landing gear and flaps. This should take place around reaching middle marker, or when passing 1000ft AGL.

- During final approach, the W/M system is again turned on when passing outer marker inbound. This is to ensure enough power is immediately available in the case of missed approach. Normally, there should be no need to advance the throttles beyond 14800 RPM during the final approach.

- You should never use W/M system in level flight, under normal cruise conditions!

- In the real plane, the maximum allowed duration for W/M injection is 5 minutes. This restriction has now been integrated into the gauge code. Using the W/M injection for extended time periods (>5min) now increases the turbine temperature, eventually causing an engine failure.

- To refill W/M supply, you will need to press the small button found on the panel behind Shift+6 keypress. The refill is only possible when aircraft is stationary on the ground, and engines are shut down.

Fuel De-icing:
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- On the aux panel (shift+6) there are two switches that control fuel deicing, one for each engine.
Each switch has three positions.
- "Manual" : Fuel heaters are always on.
- "OFF" : Fuel heaters are always off.
- "Auto" : Fuel heaters are turned on automatically when the fuel pressure in the fuel filter differs more
than 3.75 psi. When pressure difference once again drops below 3.75 psi the heaters are automatically
turned off
- There is single indicator light below each fuel deicing switch. This light illuminates when the pressure difference in
the fuel filters is greater than 3.75 psi, which suggest a clog in the fuel filters probably caused by an accumulation
of ice.
- Note that using fuel heaters will reduce the available power by approximately 5%.
- Ys11 operations manual states that: "If the indicated fuel temperature is below 5C or
the outside air temperature is below -15C, in case of airplanes not equipped with the fuel
temperature indicators, keep the fuel filter deicing switch in "MANUAL" ".
- For approach and landing, the manual recommends to keep the fuel deicing switch to MANUAL
for 2 minutes within 5 minutes before landing and then turn off the fuel filter deicing
switch. (Fuel deicing is recommended to be turned off before landing because it
limits the available engine power in case of a go-around)
"The National Transportation Safety Board determines that the probable cause of this accident
was the loss of power in the right engine due to the freezing of water in the fuel filter after
the fuel heaters were turned off in accordance with the before-landing checklist"
Source: NATIONAL TRANSPORTATION SAFETY BOARD,
Aircraft Accident Report,
Reeve Aleutian Airways Nihon YS-11A, N169RV
MNG SALMON, ALASKA
FEBRUARY 16,1982
NTSB-AAR-82-14
- Important: When the outside temperature drops below -20C the amount of ice forming increases rapidly, under these
conditions it is recommended to keep the fuel deicing switch always on "MANUAL". If the outside temperature is
above -20C the recommendations given in the operations manual are adequate and should be followed.

Starting the engines:
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Engine start and light switch panel is brought up with "Shift+2".

A step-by-step procedure:

Pre-start check:
Check that "low stop lever" is on "Ground" position and H.P.C levers are "off", and that neither prop is feathered.

1. Select the engine you are starting with the "engine select" switch. Normally No. 2 engine (starboard) is started first.
2. Switch Starter Master Switch to "start"
3. Push Starter push button.
4. Wait the starter motor to increase engine RPM to around 1200-1500 RPM, then move the H.P.C lever for that engine to "on".
5. After ignition, wait for the engine to reach approximately 4000 RPM, then move the H.P.C lever to H.SWL.
6. Repeat the procedure for the other engine

You'll leave the H.P.C levers at the H.SWL position for the taxi and takeoff. After you've stabilized the climb, you can move them back to the "on" position for the cruise phase. Once you're preparing for the approach, you'll move them back to the H.SWL. The H.SWL is referred in the checklists as "lock out".

When starting up the engines:
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- Ctrl+E command for auto-starting the engines does not work unless both
"high pressure fuel cock" levers are set to HSLW.

Few other things:
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For takeoff, you should set the engine RPM to 15000, and after the initial climb reduce it to 14500 RPM.

After touchdown, you must manually place the "low stop lever" to "ground fine pitch" position to slow down the aircraft.

Please remember to copy the ys11_gauges.cab to the fs2002\gauges folder and the fx_tchdwn_YS11.fx to the fs2002\effects folder. Depending on your system settings, the *.cab file may show up as a WinZip file, and the file extension may not be visible. Whatever the case, you should under no circumtances unzip or extract the contents of the ys11_gauges.cab! Please copy it into the main FS2002's gauges folder as it is.