REFLECTOR:retractable gear -mechanical stop to limit up travel
Carl Hoffman
reflector@tvbf.org
Tue, 29 Jul 2003 20:54:02 -0400
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The mechanical stops you refer to are in the wheel wells, in the top
strakes. They are half moon in shape and are made by removing the inner
skin and foam, and glassing the resulting cavity with micro and 3 or 4
plies of BID. They are made at the time the top strake is prepare for
closure. They provide additional room for the wheels, stop the rotating
wheels, prevent foam from being crushed.
There is of course an aluminum stop (over thick washer) on the end of
the hydraulic ram and cable bridle to build pressure for the limit
switch to shut down the motor.
Since the retract system is not symmetrical, one of the wheels is
stopped by it's stop, and the remaining wheel is pulled into the well
with the pulleys, cables, bridle and scissors action of the over center
linkage.
The system should be rigged so that the aluminum stop causes the motor
to shut down, not the second stop in the wells.
The system should be check as part of the "Annual Condition Inspection",
which I did last Saturday during N1QR's 3rd Annual.
Place the plane on jack stands, retract the gear. Place your hand into
the wells, rotate the wheels. One wheel should be hard to rotate, the
other easy to rotate. If not, adjust bridle or length of the aluminum
stop.
Carl Hoffman, SRGE Franklin-MT
jack wrote:
> I recall seeing pictures somewhere showing a mechanical stop, to stop
> the tire from raising to high in the well.I cannot locate any
> reference to any stops in the manual.I understand that if properly set
> up ,this should not be an issue ,but in any case wonder what others
> have done, and if they have installed a stop, where did you install
> it?
> Thanks Jack std rg elite
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The mechanical stops you refer to are in the wheel wells, in the top strakes.
They are half moon in shape and are made by removing the inner skin and
foam, and glassing the resulting cavity with micro and 3 or 4 plies of
BID. They are made at the time the top strake is prepare for closure. They
provide additional room for the wheels, stop the rotating wheels, prevent
foam from being crushed.
<br>There is of course an aluminum stop (over thick washer) on the end
of the hydraulic ram and cable bridle to build pressure for the limit switch
to shut down the motor.
<br>Since the retract system is not symmetrical, one of the wheels is stopped
by it's stop, and the remaining wheel is pulled into the well with the
pulleys, cables, bridle and scissors action of the over center linkage.
<br>The system should be rigged so that the aluminum stop causes the motor
to shut down, not the second stop in the wells.
<br>The system should be check as part of the "Annual Condition Inspection",
which I did last Saturday during N1QR's 3rd Annual.
<br>Place the plane on jack stands, retract the gear. Place your hand into
the wells, rotate the wheels. One wheel should be hard to rotate, the other
easy to rotate. If not, adjust bridle or length of the aluminum stop.
<p>Carl Hoffman, SRGE Franklin-MT
<p>jack wrote:
<blockquote TYPE=CITE><style></style>
<font face="Arial"><font size=-1>I
recall seeing pictures somewhere showing a mechanical stop, to stop the
tire from raising to high in the well.</font></font><font face="Arial"><font size=-1>I
cannot locate any reference to any stops in the manual.</font></font><font face="Arial"><font size=-1>I
understand that if properly set up ,this should not be an issue ,but in
any case wonder what others have done, and if they have installed a stop,
where did you install it?</font></font><font face="Arial"><font size=-1>
Thanks</font></font><font face="Arial"><font size=-1>
Jack std rg elite</font></font> </blockquote>
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