Gentlemen, I have located and purchased an outstanding pair of needle-nose
pliers made by XURON Corp. It also has serrations at the tip which is only 1/16"
square. For a complete product listing visit, www.xuron.com and the item # is:
450S TWEEZERNOSE PLIER with SERRATED JAWS. Enjoy, Ciao,
Phedon
________________________________
From: hermann andresen <hermanna_at_hotmail.com>
To: construction Indoor <indoor_construction_at_yahoogroups.com>
Sent: Mon, March 7, 2011 8:46:44 PM
Subject: RE: [Indoor_Construction] Re: SO heli's
The bottom rotor runs in the downwash of the top rotor, so benefits from higher
pitch.
Some use very low pitch in top ~10deg, & 60-90deg in bottom.
As to stability, many light indoor heli's can't be launched straight enuf down
to hit the floor before recovery.
Have never seen one launched horizontal that didn't make a quick turn for the
vertical. This included a "reversible" in NFFS SYMPO88 which was stable when
wound in either direction! Defies all logic & probably some physical laws.
Be happy, don't worry,
H
________________________________
To: Indoor_Construction_at_yahoogroups.com
From: spinecho_at_yahoo.com
Date: Tue, 8 Mar 2011 03:20:11 +0000
Subject: [Indoor_Construction] Re: SO heli's
"SO helicopter designers. Some of whom seem to go out of their way to align the
rotors along a common axis."
Perhaps this is done to increase stability?
Which rotor should have the greater pitch? The bottom fixed rotor or the top
free rotor?
--- In Indoor_Construction_at_yahoogroups.com, Bill Carney <wcarneyjx_at_...> wrote:
>
> Jeff,
> Thanks for the clarification. I don't know if this interpretation is held by
> event supervisors but seems to held by most SO helicopter designers. Some of
> whom seem to go out of their way to align the rotors along a common axis.
>
>
> Bill C
>
>
>
>
> ________________________________
> From: Jeff <janderson_at_...>
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Mon, March 7, 2011 5:08:27 PM
> Subject: [Indoor_Construction] Re: SO heli's
>
>
> Uhhh, what statement in the rules dictates rotors sharing a common axis? Not
> what I thought I wrote, nor the way I interpret it going back and re-reading.
>
> I think the relevant paragraph you are looking at is para 2.d. What we meant
> was that all the blades for a single rotor must be in a common plane, not that
> the axes for different rotors must be common. In other words, a Chinook style
> model helicopter should be fine (don't know about competitive though).
>
> If we butchered the lanquage so bad that one axis is a common interpretation by
>
> event supervisors, feel free to put in a clarification on the NSO site.
>
> Note, if folks feel this discussion is not appropriate to this forum, let me
> know and we'll take it off line.
>
> Jeff Anderson
> Livonia, MI
>
> --- In Indoor_Construction_at_yahoogroups.com, Bill Carney <wcarneyjx_at_> wrote:
> >
> > Neil,
> > Â Another thing, the rules practically dictate a ceiling walker design.
>Since
>
>
> > the rotors have to share an axis of rotation. About the only thing else you
>can
>
> >
> > do is add another rotor or increase number or blades per rotor.
> >
> > Bill
> >
> >
> >
> >
> > ________________________________
> > From: Neil Dennis <wombatt_at_>
> > To: Indoor_Construction_at_yahoogroups.com
> > Sent: Mon, March 7, 2011 8:50:07 AM
> > Subject: [Indoor_Construction] SO heli's
> >
> > Â
> > Just wondering, isn't anyone building something other than "ceiling
> > walkers" ?
> >
> > The ones I've built or worked with all had the bottom rotor fixed to the
> > motor stick, but I think the "both rotating" is a better idea as you can
> > let them come up to speed before launch instead of just "tossing" and
> > hoping it starts going vertical.
> >
> > wombat
> >
>
Received on Thu Mar 10 2011 - 16:34:02 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET