Re: Re: VP-mechanism: geometry symmetry and bearing friction

From: Ken Achee <laflyer100_at_yahoo.com>
Date: Mon, 25 Jul 2011 20:14:14 -0700 (PDT)

on the machinist blog they straightening music wire but chucking one end in a drill motor with the wire running through a hole in a 1/4" plate or piece of wood.  the tool is held at a 45 degree angle starting next to the chuck.  Run the motor at a fairly slow speed and move the tool away from the chuck towards the end of the wire.   I was amazed how well it worked.



>________________________________
>From: Benjamin Saks <bensaks_at_gmail.com>
>To: Indoor_Construction_at_yahoogroups.com
>Sent: Monday, July 25, 2011 4:10 PM
>Subject: Re: [Indoor_Construction] Re: VP-mechanism: geometry symmetry and bearing friction
>
>
> 
>It's worthwhile to straighten your music wire or guitar string before making prop shafts. Most strings come packaged in a coiled loop in a paper envelope. The coiled wire has a memory and I've found props wobble from this.
>How do I straighten mine? Well stringing them on a guitar works great if you have one but hanging a weight off the end will do fine. I let mine stretch for a week or so.
>On Jul 25, 2011 4:37 PM, "John Kagan" <john_kagan_at_hotmail.com> wrote:
>> --- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo <tapio.linkosalo_at_...> wrote:
>>>
>>> Looking at Treger's drawing (in INAV 125) I find that he uses 0.35mm
>>> (0.0138") wire for the axis. Mine is 0.30 (0.0118"), as that size is
>>> readily available, but maybe that is too thin and bends in an
>>> uncontrolled manner? What size are other D fliers using?
>>>
>>
>> If you are talking about the prop shaft (the part the rubber connects to), I'd say .0118" is too small. I use .013" marked, which measures more like .0135"
>>
>> The material will also make a difference. Guitar strings work for me - and are cheap and readily available. I tried some stainless steel wire from Small Parts once that didn't work well.
>>
>
>
>
>
Received on Mon Jul 25 2011 - 20:14:20 CEST