Mailing List lml@lancaironline.net Message #62345
From: <marv@lancair.net>
Subject: Re: 360 Main Gear
Date: Mon, 11 Jun 2012 09:11:23 -0400
To: <lml>


Posted for "Greenbacks, UnLtd." <N4ZQ@VERIZON.NET>:

 Hi Scott,
 
 1. The legs are rigid.
 2. Wheel bearings are properly tensioned.
 3. TK5's correctly installed
 4. The only side to side looseness is where the casting pivots on the leg. I
think a thin washer or two will correct.
 
 AMA
 
 
> 1. The LEG should be rigid as it can be with its 4 (or 5 if you like)
>movement points (2 solidly bolted rod ends on the over center over-center
>link, the 2 leg pivot bearings in the fwd and aft spars plus the link pivot
>bolt itself).
> 2. The wheel should be tight enough on the axle so that a push/flick attempt
>to rotate it should have it stop before one rotation (i.e. the bearings must
>be tight against the wheel hub), thus no side movement.
> 3. Then there is the leg pivot bolt that the casting rotates on and that
>should be tight enough to allow fwd/aft rotation, but very little sideways
>displacement.
> 4. That leaves the suspension (TK5's ?) that contributes nothing particularly
>structural to side loads.
>  
> So, where is it too loose or is it loose?
>  
> When the plane sits on its wheels, the stub wing is bearing the fuselage
>weight and flexes a bit so the wheel is under a load that pushes it outboard.
> You would notice this when the plane is first jacked off the floor and the
>wheels pull inboard a bit.
>  
> Scott Krueger

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