Väike-Sõjamäe 1A, 11415
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Aviation tools such as transporter stands have its standard arrangements which have to be carefully checked during aircraft maintenance process. Sixteen tie down rings, (eight on each side), are available on the longitudinal sides of the transporter stand FB70010-2V250, FB70010-2V250ASH for lashing down during shipping, (when the wheels are in the raised condition). Standard ground clearance, with wheels lowered, is 100mm.
The Transporter Stand FB70010-2V250, FB70010-2V250ASH dimensions are:
Aircraft tools as well as transporter stand can be factory finished to customer requirements. Normal finish is ‘Skydrol’ Resistant Gloss Paint.
Towing speed of the stand during workshop and aircraft maintenance ground handling is limited to a maximum of 3 m.p.h. (5 km/h), over a hard, flat and level surface. This is a safety requirement and must always be adhered to. Failure to do so could result in an accident and or damage to the equipment and jet engine.
Wheel assemblies: aviation tools standard arrangement – spring loaded castors
The transporter stand FB70010-2V250, FB70010-2V250ASH is provided with four special castor units, one at each corner of the unit. Each castor unit comprises a double wheel assembly, and is fitted with a foot-operated parking brake; and each unit is suitably spring loaded, once again to reduce shock transmissions to the engine.
All three springs per wheel assembly are pre-compressed at fabrication and locked. Each castor unit can be rotated through 360 degrees to increase the mobility of the transporter assembly, by using the special handles and locked in position by use of the indexing spigot. The handles are stored within the main frame when not in use.
Some aviation tools such as the castor wheels can be raised or lowered by removing the bolt and locking pin and re-adjusting their position. When these are in the raised position, the transporter will sit on the deck of the transport, or on the workshop floor.
Alternative arrangement – Ackerman type steering system
Ackerman type steering, complete with fully steerable cellular rubber tyred wheels, can be provided at both ends of the transporter stand, incorporating a hand operated hydraulic pump/cylinder assembly for raising and lowering each set of wheels. The hydraulic pumps fitted to this system are set to ‘break’ at between 390-400 bar pressure, to give a working pressure of 350 bar. All hoses and fittings are rated for normal use at 330 bar with a 4:1 factor of safety.
Flow restrictor valves are fitted at each cylinder to permanently control the rate of stand lowering to approx. 100mm/6 secs. including the event of sudden fluid loss caused by a hose, pump or joint failure. This option enables greater ground clearance to be obtained (than with the standard arrangement). This is useful when travelling up an incline or over a ramp.