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Dynam Waco YMF-5 Tailwheel Problem

Old 02-24-2021, 02:37 PM
  #1  
GorillaToast
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Default Dynam Waco YMF-5 Tailwheel Problem

Hi All.
I just finished putting together this plane, but I have a problem with the steerable tailwheel. The fitting for the wheel is frozen up in the fuselage and will only turn with fliers applied. I have loosened the screw in the pushrod at the servo arm, so I know it is not a problem there.

Has anyone else experienced this and come up with a fix for it?

Thanks.
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Old 02-24-2021, 08:26 PM
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solentlife
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is this the 1270mm Dynam version ?

https://cdn.shopify.com/s/files/1/10...ca326b10f9.pdf

You should be able to use a hex driver to remove the tailwheel assembly to see where its catching ... it may be that you have it reversed or something ...
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Old 02-24-2021, 09:52 PM
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GorillaToast
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The knurled nut that is embedded in the fuselage and is connected by pushrod to the rudder servo will not turn unless I apply leverage with pliers. I suspect some of that contact cement the factory used to glue everything together got slopped on to the mechanism. For now, until I hear from someone that has had this problem and fixed it, I plan to disconnect the pushrod at the servo arm so that it won't bind and stress the servo. I backed out the set screw that holds the TW wire in just enough so that the wheel will turn freely yet not fall out.

Thanks again.
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Old 02-24-2021, 10:06 PM
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solentlife
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So if you can disconnect that rear nut from servo .... then keep forcing by hand till it turns easily ... keep working it.

Another solution is to lose the servo connected system and then link to the rudder .... here's a simple shock absorbing link that does not stress rudder :

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Old 02-25-2021, 01:00 AM
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GorillaToast
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Thanks. I'll look into doing that.
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