[NSRCA-discussion] Elevator setup with anhedral stabs

Sun Sep 23 22:35:13 AKDT 2007

I've used the technique of attaching two lasers on each elevator half on
flat stabs on my last four pattern planes,
though I've never done so on an anhedral stab.

Three great things about this technique are: 1) you can project the dots out
quite far (I normally do so about 6 to 10 feet) which greatly exaggerates
any difference in the travel of the elevators. 2) you can move the elevator
up an down very rapidly and make sure the speed of travel
of each half is the same. It's quite easy to see if the dots stay next to
each other, and 3) the lasers are so light that they don't effect the
movement of the elevators as long rods do.

On a flat stab you can focus the two dots right next to each other or on top
of each other but with the anhedral stab they will
cross as they move up and down, this should still work though but it may not
as easy to see.

BTW, I normally point mine at my white refrigerator, it works just fine, no
need for anything fancy.

Keith Black

On 9/23/07, John Ferrell <johnferrell at earthlink.net> wrote:
>
>  This whole thread has me pondering the effects of the angle of the
> elevator hinge line.
> Is it too small to worry with or could there be some advantage there to be
> exploited?
>
> John Ferrell    W8CCW
> "Life is easier if you learn to plow
>        around the stumps"
> http://DixieNC.US <http://dixienc.us/>
>
> ----- Original Message -----
> *From:* rcmaster199 at aol.com
> *To:* nsrca-discussion at lists.nsrca.org
> *Sent:* Sunday, September 23, 2007 7:02 AM
> *Subject:* Re: [NSRCA-discussion] Elevator setup with anhedral stabs
>
>
>
>  HMMMM.....The laser idea I think is a good one. I wonder how a pair of
> small pointer lasers, each taped onto an elevator half, could work. Turn
> them on and let them point at some kind of screen against a wall. A 17x24"
> piece of quadruled vellum might make a good screen. Accurate positioning of
> the lasers is critical but shouldn't be too bad for a real pattern animal.
> Haven't tried it myself tho, so take it with a big grain of salt.
>
> Am planning anhedral on my new design so I will need a good technique too.
>
> MattK
>
>
>
>
> -----Original Message-----
> From: Stuart Chale <schale at optonline.net>
> To: 'NSRCA Mailing List' <nsrca-discussion at lists.nsrca.org>
> Sent: Fri, Sep 21 11:57 AM
> Subject: Re: [NSRCA-discussion] Elevator setup with anhedral stabs
>
> I think a laser setup could work pretty well if the pivot is accurate.  I  will probably try the measuring from the table to the rods first and see if  I can pick up a cross hair laser next trip to Home Depot or similar.  Thanks for the idea guys    -----Original Message-----  From: nsrca-discussion-bounces at lists.nsrca.org  [mailto:nsrca-discussion-bounces at lists.nsrca.org <nsrca-discussion-bounces at lists.nsrca.org?>] On Behalf Of Steve Byrum  Sent: Friday, September 21, 2007 10:12 AM  To: 'NSRCA Mailing List'  Subject: Re: [NSRCA-discussion] Elevator setup with anhedral stabs    Guys    Walmart has a $10 level that does as Ed suggests.  I use it to set up  Curares for SPA.  Level the ele!
>  vator at neutral with the laser on both ends  of the elevator.  Hold full up and elevate the laser.  If it doesn't still  hit both ends of the elevator, it's obvious which one is off.  Same with  down.    Semi high tech and cheap.  To elevate the laser, I use a scrap of 2-1/2 wide  aileron stock as a wedge.  Slide it under to elevate.  Pull it out to  depress.    Steve Byrum   (256)737-9828      -----Original Message-----  From: nsrca-discussion-bounces at lists.nsrca.org  [mailto:nsrca-discussion-bounces at lists.nsrca.org <nsrca-discussion-bounces at lists.nsrca.org?>] On Behalf Of Ed Alt  Sent: Friday, September 21, 2007 8:51 AM  To: 'NSRCA Mailing List'  Subject: Re: [NSRCA-discussion] Elevator setup with anhedral stabs    Hi Stu:  Bushnell makes a nifty laser level that can be set for a point, a horizontal  line or a crosshair.  I've used the crosshair for this type of adjustment  with a flat stab !
>  and it works great.  I suspect that it might also work well  if you us
>
> e it in a "scanning mode".      What I normally do is just line up the vertical line on the rudder post, get  the stab set and then do the elevators.  The level has a magnetic base and  you can pivot it up & down on that base.  Now, for the anhedral stab it  might work well if you sight it at the root, then adjust up or down to site  a mid point, then again at the tips of the elevators.  Seems plausible  anyway.    Radio Shack was dumping these at half price for a while, not sure if you can  still find them there.    Ed    -----Original Message-----  From: nsrca-discussion-bounces at lists.nsrca.org  [mailto:nsrca-discussion-bounces at lists.nsrca.org <nsrca-discussion-bounces at lists.nsrca.org?>] On Behalf Of Stuart Chale  Sent: Friday, September 21, 2007 8:24 AM  To: 'NSRCA Mailing List'  Subject: Re: [NSRCA-discussion] Elevator setup with anhedral stabs    I tried this question on RCU and didn't !
>  get any great answers so I thought I  would try here.    Does anyone have a good method for comparing the throw of both elevator  halves on anhedral stabs?  With a regular stab I use a 15 inch piece of 1/8  carbon fiber rod on each elevator meeting behind the rudder and compare  their track with movement of the elevator stick.  This is much more accurate  to me, than clip on throw meters or ruler measurements.  With anhedral stabs  the two rods will separate as you give up elevator and come together and  cross with down elevator.  I guess you can measure the height of the end of  the rod from the table at different positions but does anyone have a better  method?    Thanks,  Stuart      _______________________________________________  NSRCA-discussion mailing list  NSRCA-discussion at lists.nsrca.org  http://lists.nsrca.org/mailman/listinfo/nsr!
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