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Robart - ROBQ0558 ROB551RS 551RS 758936500100 0758936500100
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Robart 551RS 85 Degree Main Gear RoboStrut Ready
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Robart 551RS 85 Degree Main Gear RoboStrut Ready
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Stock Number
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Stock Status
Early Oct

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Tech Notes
This is a set of Robart 85 Non-Rotating Main Retracts for
model airplanes weighing 8-18 pounds.


These are Robostrut ready
Positive UP and DOWN lock and smooth cam action mechanism.
Aluminum housing supports an aluminum pivot bearing.
Retract unit only with NO struts


One 85 Heavy Duty Retract unit right side
One 85 Heavy Duty Retract unit left side
One detailed installation instruction sheet


Air Control Kit (Tubing, Valves, Air Vessel).
Hand pump with gauge, use ROBQ2363.
Wheels, struts.


Retract Unit: Length: 3.69" (93mm) (including air cylinder)
Length: 1.5" (38mm) (mounting plate)
Width: 1.75"
Depth: 1.125"


Optional Quick Connector (ROBQ2395)
(for ease in connecting and disconnecting the lines to the wings)
Optional Air Restrictors (ROBQ2389)
(restricts air flow to the Retract for a realistic movement,
and slows down the Retract Mechanism to scale speed).
A standard servo may be used to operate these Retracts.
Axles are not included (The instructions state how to bend the struts
with heat)

ajw 8/22/06

– If you need more information, use these Robart resources –
Web Site:
Phone: 630-584-7616
  Postal Address:
625 N. 12TH STREET

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