Jonker Sailplanes JS3 Technical specifications

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page i
JS-3 Jet Sustainer
Flight Manual Supplement
Type:
JS-3
Model:
JS-3
Serial number:
Registration Number:
Document number:
JS03-AFM-00-002
Title:
JS-3 Jet Sustainer
Flight Manual Supplement
Issue:
00
Date of issue:
08.02.2019
Responsible for
content:
Issue 00 of this JS-3 Aircraft Flight Manual is in the approval process
approved under the authority of Jonker Sailplanes DO
Sections 2, 3, 4 and 6 are in the approval process by the SACAA.
Copyright ©:
Jonker Sailplanes (Pty) Ltd
1 Tiger Moth Street 
2531 Potchefstroom
-All rights reserved-

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
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JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–1
0 Document Management
0.1 Record of Revisions
Issue
Date
Reason for Change
00.32JS
08.02.2019
Draft issue submitted to SACAA
for approval

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–2
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JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–3
0.3 Record of Amendments
Date of Issue/
Revision
Date of
Insertion
Signature

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–4
0.4 Table of Contents
0Document Management............................................................0–1
0.1 Record of Revisions.......................................................................0–1
0.2 List of effective Sections.................................................................0–2
0.3 Record of Amendments..................................................................0–3
0.4 Table of Contents...........................................................................0–4
0.5 List of Figures.................................................................................0–6
0.6 List of Tables..................................................................................0–7
0.7 List of Abbreviations.......................................................................0–7
1General .......................................................................................1–1
1.1 Introduction.....................................................................................1–1
1.2 Certification Basis...........................................................................1–1
1.3 Warnings, Cautions and Notes.......................................................1–1
1.4 Descriptive Data.............................................................................1–1
1.5 Technical Data ...............................................................................1–2
1.6 Engine System Illustration..............................................................1–3
2Limitations .................................................................................2–1
2.1 Introduction.....................................................................................2–1
2.2 Airspeed limits................................................................................2–1
2.3 Airspeed indicator markings...........................................................2–1
2.4 Power-plant fuel and oil..................................................................2–2
2.5 Power plant instrument markings...................................................2–2
2.6 Power plant limitations ...................................................................2–3
2.7 Approved manoeuvres ...................................................................2–4
2.8 Minimum equipment list..................................................................2–5
2.9 Temperature restrictions when flying with the engine running........2–5
2.10 Altitude limitations ..........................................................................2–5
2.11 Limitations and jet system operation placards................................2–6
3Emergency procedures ............................................................3–1
3.1 Introduction.....................................................................................3–1
3.2 Engine failure in flight.....................................................................3–1
3.3 Fire.................................................................................................3–2
4Normal operating procedure....................................................4–1
4.1 Introduction.....................................................................................4–1
4.2 Daily Inspection..............................................................................4–1
4.3 System inspection..........................................................................4–1

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–5
4.4 JDU primary Controls.....................................................................4–3
4.5 Modes overview .............................................................................4–5
4.6 Primary Modes...............................................................................4–6
4.7 Transition modes............................................................................4–9
4.8 Engine Protection modes .............................................................4–13
4.9 In-flight operating procedures.......................................................4–14
4.10 Ground operation procedures.......................................................4–16
5Engine status and information display ...................................5–1
5.1 Status Indicators.............................................................................5–1
5.2 Error messages..............................................................................5–7
6Performance...............................................................................6–1
6.1 Engine performance.......................................................................6–1
6.2 Flight performance .........................................................................6–2
7System description ...................................................................7–1
7.1 Kinematic system...........................................................................7–1
7.2 Electrical system ............................................................................7–7
8Settings ......................................................................................8–1
8.1 Fuel and battery levels...................................................................8–2
8.2 Altitude and Outside air temperature..............................................8–3
8.3 Viewing Engine log.........................................................................8–3
8.4 Password........................................................................................8–4
8.5 Configuration..................................................................................8–5
9Service Bulletins........................................................................9–1
10 STCs and Minor Change Approvals...................................10–1
11 Contact...................................................................................11-1
11.1 Type Certificate Holder.......................Error! Bookmark not defined.
11.2 Manufacturer / Maintenance...............Error! Bookmark not defined.

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–6
0.5 List of Figures
Figure 1-1: Jet System Illustration..................................................................1–3
Figure 2-1: Jet Sustainer Limitation Placard...................................................2–6
Figure 2-2: Engine Start-up Procedure Placard .............................................2–7
Figure 2-3: Engine Shut-down Procedure Placard.........................................2–7
Figure 2-4: Emergency Fuel Shutoff Placard .................................................2–8
Figure 2-5: Fuel Type and Mixture Placard....................................................2–8
Figure 2-6: Refueling/Defueling Placard.........................................................2–9
Figure 2-7: Fuse Box Layout Placard.............................................................2–9
Figure 4-1: JDU Primary Controls ..................................................................4–3
Figure 4-2: Modes Overview..........................................................................4–5
Figure 4-3: Quick Connector for Refueling...................................................4–18
Figure 5-1: Status Indicators..........................................................................5–1
Figure 5-2: Display.........................................................................................5–3
Figure 6-1: Static Thrust and Fuel Consumption vs RPM ..............................6–1
Figure 6-2: Expected Saw-tooth Profile Flown Between 2000 and
3000 m at 95000 RPM........................................................................6–3
Figure 7-1: Kinematics System ......................................................................7–1
Figure 7-2: Kinematics System ......................................................................7–2
Figure 7-3: Front Doors Kinematics ...............................................................7–3
Figure 7-4: Fuel System and Tanks ...............................................................7–4
Figure 7-5: Fuel System Layout Diagram.......................................................7–6
Figure 7-6: Schematic Layout of Electrical System........................................7–8

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 0–7
0.6 List of Tables
Table 1.5-1: Engine Technical Data...............................................................1–2
Table 2.2-1: Airspeed Limits...........................................................................2–1
Table 2.3-1: Airspeed Indicator Markings.......................................................2–1
Table 2.4-1: Engine Technical Data...............................................................2–2
Table 2.6-1: Power Plant Limitations..............................................................2–3
Table 4.6-1: Throttle Settings and Thrust.......................................................4–7
Table 5.1-1: Status Indicators Description......................................................5–2
Table 5.1-2: RPM Limitations Display............................................................5–4
Table 5.1-3: Temperature Limitations Display................................................5–4
Table 6.2-1: Range from Saw-tooth Profile for Different RPM Settings at
400 kg –SI units.................................................................................6–3
Table 6.2-2: Range from Saw-tooth Profile for Different RPM Settings at
882 lbs –US customary units .............................................................6–4
Table 6.2-3: Endurance & Range vs RPM in Level Flight ..............................6–5
0.7 List of Abbreviations
ECU
Electronic Control Unit
EGT
Exhaust Gas Temperature
JDU
Jet Display Unit
M&D
M&D Flugzeugbau GmbH & Co. KG
OAT
Outside Air Temperature
RPM
Revolutions Per Minute
L/H
Liters Per Hour
GPH
Gallons per hour (US Gallons)
VFR
Visual flight rules
VMC
Visual meteorological conditions

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 1–1
1 General
1.1 Introduction
This manual has been prepared to provide pilots, instructors and
maintenance personnel with all the information for the safe and efficient
operation of the JS-3 sailplanes equipped with the jet sustainer system
MD-TJ42.
1.2 Certification Basis
Refer to the JS03-AFM-00-001 JS-3 Aircraft Flight Manual Section 1.2.
1.3 Warnings, Cautions and Notes
The following definitions apply to Warnings, Cautions and Notes used
in this Flight Manual Supplement.
WARNING: means that the non-observation of the corresponding
procedure leads to an immediate or important degradation
of the flight safety.
CAUTION: means that the non-observation of the corresponding
procedure leads to a minor or to a more or less long-term
degradation of the flight safety.
NOTE: draws the attention on any special item not directly related
to safety but which is important or unusual.
1.4 Descriptive Data
The JS-3 with the MD-TJ42 is a sustainer version of the pure sailplane.
A jet system designed to sustain the glider in flight is fitted in the rear
fuselage. The system is completely retractable and does not impact the
normal operation of the glider during conventional soaring flight.

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 1–2
1.5 Technical Data
Engine technical data
Engine
MD-TJ42
Manufacturer
M&D Flugzeugbau GmbH, Friedeburg
Maximum rotary speed
97 000 RPM
Idle speed
30 000 RPM
Thrust at maximum rotary speed
35 daN (at MSL and ISA conditions)
Consumption at maximum rotary
speed
60 kg/h
Thrust at idle speed
3 N
Consumption at idle speed
7.47 kg/h
Air consumption
0.5 m3/s
Compression ratio
1 : 3.8
Exhaust gas temperature at Idle
speed
500 °C (932 °F)
Exhaust gas temperature at
maximum RPM
790 °C (1472 °F)
System technical data
Complete system weight –no fuel
16 kg
Table 1.5-1: Engine Technical Data

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 1–3
1.6 Engine System Illustration
Figure 1-1: Jet System Illustration

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 1–4
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JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 2–1
2 Limitations
2.1 Introduction
Section 2 includes operating limitations, instrument markings, and basic
placards necessary for safe operation of the aircraft’s engine systems.
The limitations included in this section in the approval process by the
SACAA.
2.2 Airspeed limits
Speed limitations and their operational significance are shown below.
Speed
IAS
Remarks
VPOmax
Maximum power plant
extension & retraction
speed
140 km/h
76 kts
Do not extend or
retract the engine
above this speed.
VPE
Power plant extended
maximum permitted
speed
250 km/h
135 kts
Do not exceed this
speed with the
engine extended.
Table 2.2-1: Airspeed Limits
2.3 Airspeed indicator markings
The airspeed indicator requires the following additional markings when
fitted with the jet turbine:
Marking
IAS
Significance
Blue line
_
135 km/h
73 kts
Best rate-of-climb speed VY(if engine is
fitted)
Table 2.3-1: Airspeed Indicator Markings

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 2–2
2.4 Power-plant fuel and oil
Table 2.4-1 gives the power plant, fuel and oil information.
Engine technical data
Fuel
Diesel mixed with 2% 2-stroke oil
Oil
Synthetic two stroke oil complying with
specification API TA, API TB, API TC or JASO
FC
Fuel capacity
22.2 liters
Unusable fuel
0.2 liters
Table 2.4-1: Engine Technical Data
2.5 Power plant instrument markings
The following information is displayed to the pilot on the Jet Display
Unit (JDU):
RPM
Throttle setting
EGT
Fuel quantity
Battery voltage
Fuel flow
Engine status
Error messages
Refer to Section 5 for a detailed description of the power plant
instrument markings.

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 2–3
2.6 Power plant limitations
Parameter
Limitation
Maximum Engine RPM
97 000 RPM
Maximum Continuous RPM
80 000 RPM
Maximum EGT
790 °C
Maximum while Starting (max. 3 s)
1000 °C
Minimum operational outside air temperature
-15 °C
Maximum operating altitude (AMSL)
3000 m (10 000 ft)
Table 2.6-1: Power Plant Limitations

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 2–4
2.7 Approved manoeuvres
This aircraft is certified in the Utility category (U), but aerobatic
maneuvers with the engine running are not permitted.
Approved flight rules2.7.1
Operation of the JS-3 in sustained flight is approved for VFR flight by
day in VMC conditions only.
Engine start, run-up, taxi procedures2.7.2
Taxi is not permitted for the jet sustainer. Engine start-up may be
performed on the ground for maintenance purposes only.
Self-launch2.7.3
Self-launch with the jet sustainer is not permitted.
Approach and landing2.7.4
Approaches and landing with the jet sustainer running is not approved.
NOTE: Operation of the Jet engine over unlandable terrain is not
approved.
NOTE: Cloud flying with the engine extended is not approved.
CAUTION: Operating the jet sustainer in heavy rain is not
recommended, as it may cause damage to the turbine
blades.

JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 2–5
2.8 Minimum equipment list
Additional instrumentation required if engine is fitted:
Magnetic direction indication
Jet display unit (JDU)
2.9 Temperature restrictions when flying with the
engine running
The engine operation is certified for an air temperature range of -15 °C
to +40 °C. Flights in conditions below -15 °C are prohibited. When the
outside air temperature is less than -15 °C, a descent to lower altitudes
(higher temperatures) must be conducted or the engine must be shut
down.
2.10 Altitude limitations
The aircraft is limited to an altitude of 3 000 m or 10 000 ft AMSL whilst
operating the jet engine.