There are planetary gear systems and then there are planetary gear systems.
Granted that probably there are present day boxes that you can turn by hand,
but thern I believe that technically speaking the gear box on the propitch
motors is also planetary and you sure can't turn that one back
Gene / W2LU
.
----- Original Message -----
From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
To: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Sent: Thursday, April 15, 2010 5:52 PM
Subject: Re: [TowerTalk] Rotor on the verge of failure? - Follow up
>
>
> Tony wrote:
>> On 4/13/2010 8:05 PM, ronald schmid wrote:
>>
>>> Get up their and make sure the bolts are all tight. Mabe it will make
>>> the noise while your up their Ron / N6DCN
>>>
>>>
>>
>> Ron,
>>
>> Ive been on the tower several times (see link below). Tower / rotator
>> bolts are tight. The noise seems to be coming directly from the rotator
>> itself and some say it's normal, others say it's not. I'm hoping that if
>> it does fail, it will freeze and not free-spin. Not sure what to expect
>> with Yaesu's planetary gear rotators.
>>
> I've not seen any rotators using planetary gear trains that offered much
> resistance to rotation. IOW you can probably turn most any of them by
> hand when the wedge is disengaged, which is the reason I went to
> rotators that use double worm gear drives.
>
> 73
>
> Roger (K8RI)
>> http://www25.zippyshare.com/v/53201444/file.html
>>
>> Thanks,
>>
>> Tony -K2MO
>>
>> _______________________________________________
>>
>>
>>
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