TECHNICAL SPECIFICATIONS
OF
NOSE WHEEL
FOR
ADVANCED LIGHT HELICOPTER (ALH)
Design Data Summary
A. Aircraft
Max. take-off weight 5500 Kg
Take-off speed 65 kmph
Max. landing weight 5500 kg
Touch down speed 65 kmph
Design Attitude Sea level
Temp ISA +15°C
B Wheels &lyres
Main Undercarriage
No. of wheels 2
No. of tyres 2
Tyre Size 18 II X5,5" -8"
Inflation pressure 195-200psi
Nominal loaded radius 202.5 mm
Max. static load
Normal 2004 Kg • Overload 2004 Kg
Max. dynamic landing load
Normal 6250 Kg
Over load 8750 Kg
Max. take off load
Normal 2004 Kg
Overload 2004 Kg
Nose Undercarriage
No. of wheels 2
No. of tyres 2
Tyre Size 13.5" X4.25" -6"
Tyre inflation pressure 105-110psi
Nominal loaded radius 147.5 mm
Max. static load
Normal 916 Kg
Over load 916 Kg • Max, dynamic landing load
Normal 2550 Kg
Over load 3426 Kg
Max, take off load
Normal 1116 Kg
Over Load 1n6Kg
C Brake
KE Capacity
Per brake 0.45 MJ
Per aircraft 0.90 MJ
Design Drag
Per brake 560 Kg
Per aircraft 1120 Kg
Decelaration 2m/sec2
Annexure -I
Sheet 2 of 3
Annexure -I
Sheet 3 of3
Table-1:: Wheel Tyre Data
Data Main Undercarriage Nose Undercarriage
Tyre Size 18" X5.5" -8" 13.5" X4.25" -6"
Ply rating 10 6
TubelTubeless Tubeless Tubeless
Max. tyre rolling speed 65 kmph 65 kmph
Max grown dimension 466X150mm 356X116 mm
Clearance Dimension 494x165 mm 382x131 mm
Wheel rim diameter 203mm 152mm
Wheel rim width 10Bmm 92mm
Fatigue life 3000 service km 3000 service km
Table-2:: Aircraft Operating Data
Taxiing distance to and from apron
Turn around time
Flight time
Undercarriage bay temperature range
Stopping Distance
Typical
Maximum
Average
Minimum
Average
Minimum
-54°C to +71°C
80 meter
300 meter
1000 meter
17 min
5 min
17 min
5 min
Table-3:: Brake &Brake System Data:
Operating fluid
Max. Back pressure in return line
Brake operating pressure
Type of control
TabJe-4:: Life Data
Main Wheel
Nose Wheel
Brake Unit
• Normal system
• Emergency system
• Parking
On Condition
On Condition
On Condition
MIL-H-5606
13.5 bar (Transient)
3.5 bar (Static)
• Normal system 68 bar
• Parking 68 bar
Master Cylinders operating brake control valve
Parking lever
TTL
10,000 landings
10,000 landings
17,500 landings
(Na~)
,.~),'20l)

Annexure - II
CLAIMS
We claim that this Nose Wheel
1. Is for use on Advanced Light Helicopter (ALH)
2. works with Tube less Tyre Size 13.5" X 4.25" -6", 6 PRo
3. Tyre Pressure range is 105 to 110 psi.
4. Overpressure is up to 3.5 times of normal tyre pressure.
5. Nominal loaded radius is 147.5 mm.
6. Is capable of taking maximum static load of 916 Kg.
7. Is capable of taking maximum dynamic landing load of 2550
Kg (Normal) and 3426 Kg (Over Load)
8. Is capable of taking maximum take off load of 1116 Kg
9. Total technical life is 10,000 landings