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

From: Benjamin Saks <bensaks_at_gmail.com>
Date: Mon, 25 Jul 2011 17:10:16 -0400

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 - 14:10:18 CEST