unk <
m...@privacy.net> wrote:
> On Tue, 17 Nov 2015 20:46:40 -0500, Steve Walker wrote:
>
>> On 11/17/2015 4:14 AM, unk wrote:
>>> I've just started playing with quadcopters, these are really neat toys.
>>>
>>> One variety of cheap ones drive a moulded plastic prop (x4) with a d.
>>>
>>> These are all loose about the same amount. I can easily measure how
>>> loose by angle.
>>>
>>> Is there a formula to calculate the shim from the angle?
>>>
>>>
>>
>> Little bit of silicone caulk.
>
> Thanks guys.
>
> You have to be able to remove props, so something like a silicone that
> will release from the steel and nylon-ish plastic could be good enough,
> just scrape it off and squirt some more in.
I've never had good luck with silicone as any type of shaft lock or
material to keep shafts and collars tight. It just has no strength, and
doesn't bond all that good to things like shafts anyways, plus it adds no
pressure to keep whatever on the shaft tight.
> The issue is that the thing is jittery and I suspect it's the props
> wobbling between driven and driving. What's the hardest when set type of
> silicone you can get in a small tube? Bonus points if it cures fast.
RTV gasket silicone has fillers and dries fast, but again, it's a poor
material for this type of use.