This supplement must be attached to the EASA approved Pilot´s
Operating Handbook of the DR400/120D, DR400/140B, DR400/180R,
DR400/200R or DR400/RP when the TAE 125-01 or TAE 125-02-99
installation has been installed in accordance with EASA.A.S.01380 or
EASA STC 10014219.
The information contained in this supplement supersedes or adds to the
information published in the EASA approved Pilot´s Operating Handbook
only as set forth herein.
For limitations, procedures, performance and loading information not
contained in this supplement, consult the EASA approved Pilot´s
Operating Handbook.
This supplement Pilot‘s Operating Handbook is approved with EASA
This manual contains the following convention and warnings. They
should be strictly followed to rule out personal injury, property damage,
and impairment to the aircraft´s operating safety or damage to it as a
result of improper functioning.
▲ WARNING: Non-compliance with these safety rules could lead to
injury or even death.
CAUTION: Non-compliance with these special notes
and safety measures could cause damage to the engine
or to the other components.
Note: Information added for a better understanding of an
instruction.
FOR DR400 AIRCRAFT FROM SERIAL NUMBER 2500 AND UP
This supplement is valid if the TAE 125-01 or TAE 125-02-99 aircraft
engine is installed.
UPDATE AND REVISION OF THE MANUAL
▲ WARNING: A safe operation is only assured with an up to date POH
supplement.
Note: The document number of this POH supplement is
Engine models ........................................ TAE 125-01 or TAE 125-02-99
The TAE 125-02-99 is the successor of the TAE 125-01. Both engine
variants have the same power output and the same propeller speeds but
different displacement. While the TAE 125-01 has 1689 ccm, the TAE
125-02-99 has 1991 ccm.
Both engine variants are liquid cooled in-line four-stroke 4-cylinder
engines with DOHC (double overhead camshaft) and are direct Diesel
injection engines with common-rail technology and turbocharging. Both
engine variants are controlled by a FADEC system. The propeller is
driven by a built-in gearbox (i = 1.69) with mechanical vibration damping
and overload release. The engine variants have an electrical self-starter
and an alternator.
▲ WARNING: The engine requires an electrical power source for
operation. If the main battery and alternator fail
simultaneously, the engine will operate for a very limited
time on FADEC backup battery power (TAE 125-02-99
installation).
Therefore, it is important to pay attention to indications of
alternator failure.
Due to the specific characteristic of the TAE 125 engine, all of the
information from the original DR400 flight manual recognized by EASA
are no longer valid with the reference to:
carburetor and carburetor pre-heating,
ignition magnetos and spark plugs, and
mixture control and priming system.
PROPELLER
Manufacturer ....................................... MT Propeller Entwicklung GmbH
Model ........................................................................... MTV-6-A/187-129
Number of blades ................................................................................... 3
Type ................................................................................ Constant Speed
NOISE LIMITATION
In compliance with the regulation ICAO, annex 16, Volume I, Part II,
Chapter X, the maximum acceptable noise level for the DR400/120D,
DR400/140B, DR400/180R, DR400/200R, DR400/RP at a certified max.
take-off weight of 980 kg (2161 lb) is 78.4 dB(A).
For the TAE 125-01 installation:
The noise level determined under the conditions of the abovementioned
regulation, with the MT Propeller MTV-6-A/187-129 propeller together
with "Akrapovic type for TAE 125" muffler, is 70.9 dB(A).
The noise level determined under the conditions of the abovementioned
regulation, with the MT Propeller MTV-6-A/187-129 propeller together
with no installed muffler, is 74.4 dB(A).
For the TAE 125-02-99 installation:
The noise level determined under the conditions of the abovementioned
regulation, with the MT Propeller MTV-6-A/187-129 propeller together
with "Akrapovic type for TAE 125" muffler, is 70.2 dB(A).
The noise level determined under the conditions of the abovementioned
regulation, with the MT Propeller MTV-6-A/187-129 propeller together
with “Langer LA 44” muffler, is 69.1 dB(A).
ELECTRICAL SYSTEM
The electrical system of the TAE 125 installation differs from the previous
Page 1 - 2 Issue 3 – July 2014
installation and is equipped with the following operating and display
elements:
1. Rocker Switch "Battery"
The battery must be switched ON in normal operation.
2. The circuit breaker below the Rocker Switch "Battery" disables the
alternator. The alternator can be left ON always.
3. Key Switch "Starter"
This switch controls the starter motor only.
4. Voltmeter
5. Warning lamp "Alternator".
Illuminates when the power output of the alternator is too low or the
circuit breaker “Alternator” (Switch resp.) is switched off. Normally, this
warning lamp always illuminates when the “Engine Master” (“IGN” resp.)
is switched on without revolution and extinguished immediately after
starting the engine.
6. Switch "Engine Master"
The Engine Master switch controls the two redundant FADEC
components, and the back-up alternator excitation battery, with three
independent contacts. It is protected against unintentional switching with
a pull-to-actuate mechanism and a guard. The alternator excitation
battery is used to ensure that the alternator continues to function in any
circumstances even if the main battery fails.
7. Switch "FORCE B"
If the FADEC does not automatically switch from A-FADEC to the BFADEC in case of an emergency despite of obvious necessity, this
switch allows to switch manually to the B-FADEC.
The backup battery ensures power supply to A-FADEC only when supply
from main battery and alternator is interrupted. This allows continued
engine operation for limited time only.
In case of a FADEC-warning, one or both FADEC warning lamps are
flashing. If then the "FADEC" Test Knob is pressed for at least 2
seconds:
a) the active warning lamps will extinguish if it was a LOW category
warning.
b) the active warning lamps will be illuminated steady if it was a
HIGH category warning.
CAUTION: If a FADEC-warning occurred, contact your
service center. Next flight is not permitted.
When a high category warning occurs the pilot should land as soon as
practical, since the affected FADEC ECU has diagnosed a severe fault.
A low category fault has no significant impact on engine operation.
Refer also to the engine manual OM-02-01 or OM-02-02 for additional
information.
FUELS, OILS and LIQUIDS
Approved fuels, oil and liquids are published in Section 2 - Limitations of
this POH Supplement.
▲ WARNING: The engine must not be started if the oil or coolant level is
too low.
CAUTION: Use of unapproved fuels, oil and coolant may result in
damage to the engine and fuel system components,
resulting in possible engine failure.
CAUTION: Normally it is not necessary to fill the cooling liquid or
gearbox oil between maintenance intervals. If the level is
Oil quantity between dipstick min and max indication: .................. 1 liter
Total engine capacity including filters and coolers: .................. 6.7 liters
Approved grades: .................................. Refer to Section 2 – Limitations
CAUTION: Use the approved oil with exact declaration only!
FUEL SYSTEM
The fuel system of the TAE 125 installation includes a variant of the
original standard tank of the DR400, plus a level sender and display, and
an independent low-level warning light. An additional sensor and display
for fuel temperature is installed.
The fuel flows out of the tank to the Fuel Selector Valve which has
positions ON and OFF.
The electrically driven fuel pump supports the fuel flow to the filter
module if required. Upstream to the fuel filter module a thermostatcontrolled fuel pre-heater is installed. Then, the engine-driven feed pump
and the high-pressure pump supply the rail, from where the fuel is
injected into the cylinders depending upon the position of the thrust lever
and regulation by the FADEC.
Surplus fuel flows to the filter module and then through the fuel selector
valve back into the tank. A temperature sensor in the filter module
controls the heat exchange between the fuel feed and return. Since
Diesel fuel tends to form paraffin at low temperatures, the information in
Section 2 “Limitations“ pertaining to fuel temperature have to be
observed. The fuel return ensures a quicker warm up of the fuel in the
tank.
If Diesel fuel is used, Diesel fuel according DIN EN 590 has to be used
exclusively.
Note: There are differences in the national
supplements to EN 590. Approved are Diesel fuels with
the addition DIN EN 590.
Table 1-1 Fuel Capacity
OPTIONAL EXTENDED RANGE TANK
▲ WARNING: The optional tank is only approved for Jet-A1
The total fuel capacity can be increased to 160 l / 35.2 Imp gal / 42.24
US gal (159 l / 35 Imp gal / 42 US gal usable) by installing an optional
fuel tank of 50 l / 11 Imp gal / 13.2 US gal.
The optional tank is located in the fuselage, aft of the rear seat. The fuel
from the optional tank can be transferred into the main tank by pulling the
transfer valve control, located on the instrument panel. The fuel
temperature and the fuel level of the optional tank are displayed either on
the triple indicator or on the quad indicator (depending on the instrument
panel model) when a momentary switch is pushed (warning LED signal).
Note: The main fuel tank must be empty enough
to receive full quantity from the optional fuel tank.
Since the optional fuel tank is not heated, it is limited to the use of
JET A-1 only to prevent a potential clogging of Diesel Fuel to low
temperature.
Figure 1-6 Heat Control Placard, Right Cabin Side Wall
This STC installation has a fourth control (Control 0 in table above). It
must be OFF (Push) when cabin heat is not required (hot outside air
temperature)
(Refer also to weight and balance chart, section 6)
The weight of the engine oil, as well as the unusable fuel must be
included in the empty weight of the aircraft.
Table 2-4 Load Planning
* The carriage on the rear seats of more than two passengers (whose
total weight remain below or equal to the maximum indicated) is
authorized, provided that passenger seat belts are installed for each
passenger and that weight and balance are kept within the authorized
limits.
** Within the authorized weight and balance limits.
Engine operating limits for takeoff and continuous operation
▲ WARNING: It is not allowed to start the engine outside of these
temperature limits.
Note: The operating limit temperature is a
temperature limit below which the engine may be started,
but not operated at the takeoff RPM. The warm-up RPM
to be selected can be found in Section 4 of this
supplement.
Oil temperature:
Minimum engine starting temperature: ........................................ -32 °C
Minimum operating limit temperature: .............................................50 °C
Maximum operating limit temperature: ..........................................140 °C
Coolant temperature:
Minimum engine starting temperature: ........................................ -32 °C
Minimum operating limit temperature: .............................................60 °C
Maximum operating limit temperature: ..........................................105 °C
Gearbox temperature:
Minimum operating limit temperature: ........................................... -30 °C
Maximum operating limit temperature: ..........................................120 °C
Oil pressure:
Minimum oil pressure ................................................................... 1.2 bar
Minimum oil pressure (at take-off power)..................................... 2.3 bar
Minimum oil pressure in flight ...................................................... 2.3 bar
Maximum oil pressure .................................................................. 6.0 bar
Maximum oil pressure (cold start <20 sec.) ................................. 6.5 bar
Maximum oil consumption ............................................................. 0.1 l/h
Minimum permissible fuel
temperature in the fuel
tank before takeoff
Minimum permissible fuel
temperature in the fuel
tank during the flight
Jet A-1, JET A,
Fuel No.3 JP-8,
JP-8+100, TS-1
- 30°C
- 35°C
Diesel
Greater than 0°C
- 5°C
Minimum fuel temperature limits in the fuel tanks:
Table 2-5 Min. Fuel Temperature Limits in the fuel tank
▲ WARNING: The following applies to Diesel and Jet A-1 mixtures in
the tank:
As soon as the proportion of Diesel in the tank is more
than 10%, the fuel temperature limits for Diesel operation
must be observed. If there is uncertainty about which fuel
is in the tank, the assumption should be made that it is
Diesel.
The engine data of the TAE 125 installation to be monitored are
integrated in the combined engine instrument CED-125. The ranges of
the individual engine monitoring parameters are shown in the following
table.
Table 2-6 Markings of the Engine Instruments
Note: If an engine reading is in the yellow or red
range, the "Caution" lamp is activated. It only
extinguishes when the "CED-Test / confirm" button is
pressed. If this test button is pressed longer than one
second, a self-test of the instrument is initiated.
GROUNDING (EARTHING) BEFORE AND DURING FUELING
Use the engine exhaust pipe for draining static charge.
Total capacity ......................................... 110 l / 29 US gal / 24.2 imp gal
Total usable fuel ..................................... 109 l / 28.7 US gal / 24 imp gal
Total unusable fuel .................................. 1 l / 0.26 US gal / 0.22 imp gal
Optional extended range tank (JET A-1 fuel only)
The total fuel capacity can be increased to 160 l / 35.2 imp gal / 42.24
US gal (159 l / 35 imp gal / 42 US gal usable) by installing an optional
fuel tank of 50 l / 11 imp gal / 13.2 US gal, which flows into the main tank
on command, most safely when the main tank can receive 50 liters. The
fuel level in the optional tank may be displayed on the instrument panel
fuel gauge indicator by pressing on the push-button switch.
Flaps retracted .................................................. (78 KIAS) 144 km/h
(In these conditions, without wind, the aircraft covers approx. 8 times
its height above ground). Locate suitable field.
If altitude is sufficient to restart:
2) Electric fuel pump ........................................................................ ON
3) FADEC A/B switch .............................................................. Force B
if this doesn't improve engine operation, return switch to "Auto"
4) If no restart ......................... Reset Engine Master (OFF then to ON)
5) Battery and ALT CB ......................................................... Check ON
6) Engine and fuel level gauges /alarm panel
................................................................. Check for cause of failure
7) FADEC A, B circuit breakers ........................................... Check ON
8) In case the tank has been run to empty with still some fuel available
in the auxiliary tank
(if so equipped) ................................. Open aux. tank transfer valve
If the propeller does not turn:
9) Starter .......................................................................................... ON
The propeller will normally continue to turn as long as the airspeed
is above 120 km/h (65 KIAS). Should the propeller stop at airspeed
of more than 120 km/h or more, the reason for this should be found
out before attempting a restart.
If it is obvious that the engine or propeller is blocked, do not use the
Starter.
If power is not restored, prepare for "landing without engine power".
If the tank has been run to empty, both FADEC lights will be flashing.
▲ WARNING: The engine high pressure pump must be checked before
a) Observe the other FADEC lamp,
b) Land as soon as practical,
c) Airspeed should be below 100 KIAS (185 km/h),
d) Inform service center after landing.
automatically between FADEC A and B in case of
malfunction, in order to select the "healthiest"
component.
If this automatic switching doesn't work, it is possible to
manually force the system to switch to FADEC B only,
and check for improvement in engine behavior.
1) Maximum airspeed ........................................ (100 KIAS) 185 km/h
2) "FADEC A/B" switch........................................................FORCE B
3) If no engine operation improvement ......... Return switch to "Auto"
Note: The switching from one FADEC to the other
one is usually accompanied by a short RPM fluctuation.
1) Engine master switch .............................................................. OFF
2) Fuel selector ............................................................................ OFF
3) Electric fuel pump.................................................................... OFF
4) Battery + alternator switch ...................................................... OFF
5) Emergency ground egress ........................................... As required
Extinguish the flames with a fire extinguisher, wool blankets or sand.
Have fire damage thoroughly examined and appropriate repairs made
before the next flight.
Engine fire in flight
1) Power lever ...................................................................... Reduce
2) Reduce speed .................................. Below (100 KIAS) 185 km/h
3) Engine master switch ............................................................ OFF
4) Fuel selector .......................................................................... OFF
5) Electric fuel pump .................................................. OFF (if in use)
6) Battery + alternator switch (after radio calls) ........................ OFF
7) Cabin heat ............................................................................. OFF
8) Glide speed ................................................... (78 KIAS) 144 km/h
9) Adjust cabin ventilation for lowest smoke in the cabin
10) Fire extinguisher (if available) ............................. Use as required
Note: Proceed with "landing without engine power".
Note: In case of an electrical fire (smell of fumes
indicating wire insulation burning):
1) All electrical equipment and c (after brief call) ....................... OFF
leave Alternator, Battery and Engine Master ON
2) Cabin ventilation .................................................................... OFF
3) Cabin heat .............................................................................. OFF
4) Fire extinguisher (if available) ............................. Use as required
▲ WARNING: After the fire extinguisher has been used, make sure that
the fire is extinguished before exterior air is used to
remove smoke from the cabin
5) If there is evidence of continued electrical fire, consider turning
OFF Battery and Alternator
▲ WARNING: If both Battery and Alternator are turned OFF, the engine
will continue to operate using the FADEC backup battery
for limited time (TAE 125-02-99 installation).
- Perform emergency landing. Refer to page 3-4.
- do not switch the “FORCE-B” switch, this will shut down
the engine!
If the fire has been extinguished:
6) Cabin ventilation ...................................................................... ON
7) Check circuit breakers, do not reset if open
8) Avionics Master Switch ............................................................ ON
9) Turn ON only electrical equipment required to continue flight
depending on the situation and land as soon as practical.
Do only switch ON one at a time, with delay after each.
Oil pressure too low (< 2.3 bar in cruise or <1.2 bar at idle power)
(1) Reduce power as quickly as possible
(2) Check oil temperature: If the oil temperature is high or near operating
limits,
i) Land as soon as possible
ii) Be prepared for an emergency landing
iii) Expect engine failure
Note: During warm-weather operation or longer
climb outs at low airspeed engine temperatures could
rise into the amber range and trigger the "Caution" light.
This warning allows the pilot to avoid overheating of the
engine as follows:
(3) Increase the climbing airspeed, reduce angle of climb
(4) Reduce power, if the engine temperatures approach the red area.
(1) Increase airspeed and reduce power as quickly as possible
(2) Check oil pressure. If the oil pressure is lower than normal (<2.3 bar
in cruise or <1.2 bar at idle),
i) Land as soon as possible
ii) Be prepared for an emergency landing
iii) Expect engine failure
(3) If the oil pressure is in the normal range
i) Land as soon as practical
Note: During hot weather operation or prolonged
climbs at low airspeed, engine temperatures could rise
into the yellow range and trigger the caution light. This
warning allows the pilot to avoid overheating of the
engine as follows:
1. Increase the climbing airspeed
2. Reduce power if the engine temperature approaches
the red area.
Coolant temperature too high
1) Check coolant level light
2) Increase airspeed and reduce the power.
3) Check cabin heat ................................................................... OFF
If coolant level light is on, or an obvious malfunction is suspected
(because airspeed was maintained above Vy, non-hot weather
conditions, cabin heat OFF) or if this does not cause the coolant
temperature to drop,
i) Land as soon as practical
ii) Be prepared for an emergency landing
iii) Expect an engine failure
2) Reduce airspeed below 100 KIAS (185 km/h) or as appropriate to
prevent propeller overspeed
3) Set power as required to maintain altitude and land as soon as
practical.
Note: If the propeller speed control fails, climb
flights can be performed at 120 km/h (65 KIAS) and a
power setting of 100%. In case of over speed the
FADEC will reduce the engine power at higher airspeeds
to avoid propeller speeds above 2500 rpm.
Fluctuations in propeller RPM
If the propeller RPM fluctuates by more than ± 100 RPM with a constant
power lever position:
1) Change the power setting and attempt to find a power setting
where the propeller RPM no longer fluctuates.
2) If unsuccessful power lever full forward at airspeed < 185 km/h
(100 KIAS) until propeller speed stabilizes
3) If normal operation is resumed, continue the flight
4) If problem continues, select a power setting where the propeller
RPM fluctuations are minimum. Fly at airspeed below 185 km/h
(100 KIAS) and land as soon as practical.
▲ WARNING: It is prohibited to fly in known icing conditions.
Icing has a very strong negative effect on the
aerodynamic characteristics of the aircraft. Stalling
speed increases.
Proceed as follows when inadvertently encountering icing:
1) Pitot heat switch ....................................................... ON (if installed)
If no pitot heat installed, expect airspeed indications to become
unreliable
2) Immediately leave the region in which the icing occurred. If possible
change the altitude to obtain an outside air temperature that is less
conductive to icing
3) Cabin heat / defrost ........................................................ As required
4) Alternate induction air ............................................................ OPEN
5) Increase power; make quick power changes from time to time to try
to clear ice from the propeller blades.
Plan to land at the nearest airfield. If the build-up of ice is extremely fast,
execute an off-airfield forced landing.
Note: A layer of 0.5 cm (0.2 in) on the leading
edge of the wing substantially increases the stalling
speed. If needed, use a higher than normal approach
speed: 145 km/h (78 KIAS). Do not use flaps.
Note: The TAE 125 requires an electrical power source for its
operation. If the alternator fails, the only power source
will be provided by the battery. The time the engine can
run on battery alone will depend on total electrical
consumption supported by the battery, i.e. the load of the
electrical equipment kept in use.
The pilot should turn off all non-essential items and
supply power only to equipment which is absolutely
necessary for continued flight depending upon the
situation.
If the FADEC back-up battery is installed (TAE 125-02-99 installation):
▲ WARNING: When both main battery and alternator have failed, the
engine will continue to operate using the FADEC backup
battery for limited time. In this case, all electrical
equipment will not operate:
- land immediately
- do not switch the “FORCE-B” switch, this will shut down
the engine!
The failure of the alternator is indicated by:
"ALT" light is ON
Voltmeter shows too low or too high voltage (red range)
Ammeter (if installed) shows battery discharge for more than
The speeds listed below are indicated airspeeds recommended for
normal operation of the aircraft.
These speeds are based on a standard aircraft, operated at max. takeoff weight, in standard atmosphere and at sea level. They may vary from
one aircraft to another depending on the equipment installed, the
conditions of the aircraft and of the engine, the atmospheric conditions
and the skills of the pilot.
Best rate of climb speed
Flaps in takeoff position (1st notch) ............................ (76 KIAS) 141 km/h
Flaps up ...................................................................... (78 KIAS) 144 km/h
Best angle of climb speed
Flaps in takeoff position (1st notch) ............................ (65 KIAS) 120 km/h
Flaps up ...................................................................... (65 KIAS) 120 km/h
Maximum operating speed in turbulent air
Flaps up .................................................................... (140 KIAS) 260 km/h
Maximum speed
Flaps in landing position (2nd notch) .......................... (92 KIAS) 170 km/h
Landing speed, final approach
Flaps in landing position (2nd notch) .......................... (62 KIAS) 115 km/h
11) Circuit breakers ........................................................................... ON
Note: The electronic engine control needs an
electrical power source for its operation. For normal
operation, battery switch and alternator circuit breaker
have to be ON. Separate switching is only allowed for
tests and in event of emergencies.
12) All electrical switches and avionics ........................................... OFF
CAUTION: The avionics power switch must be off
during engine start to prevent possible damage to
avionics.
▲ WARNING: The whole test procedure has to be performed without
any discrepancy. In case the engine shuts down or the
FADEC lamps are flashing, takeoff is PROHIBITED. This
applies even if the engine seems to run without failure
after the test.
Note: If the test button is released before the self-test is fully
completed, the FADEC immediately resumes normal
operation.
Note: While switching from one FADEC to
another, it is normal to hear and feel a momentary surge
in the engine.
10) Thrust Lever ........................................................ FULL FORWARD,
RPM must be stabilized
load display minimum 94%
RPM 2240 - 2300
Note: The power check should be performed at a
place which is free of debris to minimize risk of damage
to propeller or other parts.
11) Thrust Lever .............................................................................. IDLE
12) Engine instruments and Voltmeter ...................................... CHECK
Best rate of climb:
145 km/h (78 KIAS) from 0 to 9 500 ft,
139 km/h (75 KIAS) up to 11 500 ft,
133 km/h (72 KIAS) above 11 500 ft.
A climb at higher speed, when best rate is not required, will provide for
more forward visibility.
1) Thrust Lever ................................................................. Full forward
Best angle of climb
A better angle of climb is obtained at 120 km/h (65 KIAS), flaps in takeoff
position or flaps up.
Note: In case that oil temperature and/or coolant temperature
are approaching the upper limit:
Verify that cabin heat is OFF.
Continue at a lower climb angle and higher speed
for better cooling if possible.
CRUISE
Note: Refer to Section 5 for RPM settings and
cruise performance.
1) Power ............ Maximum load 100 % (maximum continuous power)
Recommended: 75 % or less
2) Elevator trim ........................................................................ADJUST
3) Compliance with limits for oil pressure, oil temperature, coolant
temperature and gearbox temperature
(CED 125 and caution lamp) ......................... MONITOR constantly
4) Fuel quantity and temperature
(display and low level warning lamp) ...............................MONITOR
▲ WARNING: If fuel temperature falls below allowable minimum,
expect engine failure. Fuel in tank is actively heated by
the returning injector overflow, so too low fuel
temperature is an extreme condition.
1) Power .................. As required to maintain the desired descent path
2) Pull cabin heat to keep the coolant warm if power setting is low. If
coolant temperature in amber range and engine caution lamp
illuminated, increase power to recover green coolant temperature
range.
Approach or down wind
1) Electric fuel pump ........................................................................ ON
Press on both pedals. Keep pressure on while pulling the parking brake
control.
Release the pressure on the pedals, the parking brake control must
remain in pulled position.
or
Pull the parking brake control.
Press on both pedals, then release the pressure on the pedals. The
parking brake control must remain in the pulled position.
Table 5-10 Time to climb (mn) at 880 kg (MTOW), 9500 – 16500 ft
Rate of climb, flaps in takeoff position
Best rate of climb:
Subtract 10% from the flaps retracted rates of climb in the above tables.
Maximum angle of climb:
8.3% at sea level, standard atmosphere, MTOW, and 120 km/h (65 kt).
Glide performance
Engine off, the aircraft glides8 times its altitude above ground (without
wind) at 145 km/h (78 kt).
Altitude and temperature do not have perceptible influence.
At maximum takeoff weight 980 kg (2161 lb), in standard atmosphere.
Range and endurance calculations take into account 45 min. reserve (at
55% load) at destination.
Assumption is made that higher consumption for climb is compensated
by a cruise descent.
Range assumes no wind.
Standard Tank ............................................................... 109 liters usable
Standard and Auxiliary Tanks ....................................... 159 liters usable
The following nomograph is used to determine balance of the DR400.
Remember that diesel and JET FUEL are heavier than AVGAS, and they
carry more energy per volume. Because the fuel in the Robin series is in
an aft location, fuel consumption shifts the CG forward.
The DR400 delivers greater range and, at altitude, greater speed, than
AVGAS-powered Robin of equivalent sea-level power ratings, for a given
volume of fuel.